git.stricted.de - GitHub/moto-9609/android_kernel_motorola

PCI: fix oops when try to find Root Port for a PCI device

Eric report a oops when booting the system after applying
the commit a99b646afa8a ("PCI: Disable PCIe Relaxed..."):

[    4.241029] BUG: unable to handle kernel NULL pointer dereference at 0000000000000050
[    4.247001] IP: pci_find_pcie_root_port+0x62/0x80
[    4.253011] PGD 0
[    4.253011] P4D 0
[    4.253011]
[    4.258013] Oops: 0000 [#1] SMP DEBUG_PAGEALLOC
[    4.262015] Modules linked in:
[    4.265005] CPU: 31 PID: 1 Comm: swapper/0 Not tainted 4.13.0-dbx-DEV #316
[    4.271002] Hardware name: Intel RML,PCH/Iota_QC_19, BIOS 2.40.0 06/22/2016
[    4.279002] task: ffffa2ee38cfa040 task.stack: ffffa51ec0004000
[    4.285001] RIP: 0010:pci_find_pcie_root_port+0x62/0x80
[    4.290012] RSP: 0000:ffffa51ec0007ab8 EFLAGS: 00010246
[    4.295003] RAX: 0000000000000000 RBX: ffffa2ee36bae000 RCX: 0000000000000006
[    4.303002] RDX: 000000000000081c RSI: ffffa2ee38cfa8c8 RDI: ffffa2ee36bae000
[    4.310013] RBP: ffffa51ec0007b58 R08: 0000000000000001 R09: 0000000000000000
[    4.317001] R10: 0000000000000000 R11: 0000000000000000 R12: ffffa51ec0007ad0
[    4.324005] R13: ffffa2ee36bae098 R14: 0000000000000002 R15: ffffa2ee37204818
[    4.331002] FS:  0000000000000000(0000) GS:ffffa2ee3fcc0000(0000) knlGS:0000000000000000
[    4.339002] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    4.345001] CR2: 0000000000000050 CR3: 000000401000f000 CR4: 00000000001406e0
[    4.351002] Call Trace:
[    4.354012]  ? pci_configure_device+0x19f/0x570
[    4.359002]  ? pci_conf1_read+0xb8/0xf0
[    4.363002]  ? raw_pci_read+0x23/0x40
[    4.366011]  ? pci_read+0x2c/0x30
[    4.370014]  ? pci_read_config_word+0x67/0x70
[    4.374012]  pci_device_add+0x28/0x230
[    4.378012]  ? pci_vpd_f0_read+0x50/0x80
[    4.382014]  pci_scan_single_device+0x96/0xc0
[    4.386012]  pci_scan_slot+0x79/0xf0
[    4.389001]  pci_scan_child_bus+0x31/0x180
[    4.394014]  acpi_pci_root_create+0x1c6/0x240
[    4.398013]  pci_acpi_scan_root+0x15f/0x1b0
[    4.402012]  acpi_pci_root_add+0x2e6/0x400
[    4.406012]  ? acpi_evaluate_integer+0x37/0x60
[    4.411002]  acpi_bus_attach+0xdf/0x200
[    4.415002]  acpi_bus_attach+0x6a/0x200
[    4.418014]  acpi_bus_attach+0x6a/0x200
[    4.422013]  acpi_bus_scan+0x38/0x70
[    4.426011]  acpi_scan_init+0x10c/0x271
[    4.429001]  acpi_init+0x2fa/0x348
[    4.433004]  ? acpi_sleep_proc_init+0x2d/0x2d
[    4.437001]  do_one_initcall+0x43/0x169
[    4.441001]  kernel_init_freeable+0x1d0/0x258
[    4.445003]  ? rest_init+0xe0/0xe0
[    4.449001]  kernel_init+0xe/0x150

====================== cut here =============================

It looks like the pci_find_pcie_root_port() was trying to
find the Root Port for the PCI device which is the Root
Port already, it will return NULL and trigger the problem,
so check the highest_pcie_bridge to fix thie problem.

Fixes: a99b646afa8a ("PCI: Disable PCIe Relaxed Ordering if unsupported")
Fixes: c56d4450eb68 ("PCI: Turn off Request Attributes to avoid Chelsio T5 Completion erratum")
Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

sfc: don't try and read ef10 data on non-ef10 NIC

The MAC stats command takes a port ID, which doesn't exist on
pre-ef10 NICs (5000- and 6000- series). This is extracted from the
NIC specific data; we misinterpret this as the ef10 data structure,
causing us to read potentially unallocated data. With a KASAN kernel
this can cause errors with:
BUG: KASAN: slab-out-of-bounds in efx_mcdi_mac_stats

Fixes: 0a2ab4d988d7 ("sfc: set the port-id when calling MC_CMD_MAC_STATS")
Reported-by: Stefano Brivio <sbrivio@redhat.com>
Tested-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: Bert Kenward <bkenward@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net_sched: remove warning from qdisc_hash_add

It was added in commit e57a784d8cae ("pkt_sched: set root qdisc
before change() in attach_default_qdiscs()") to hide duplicates
from "tc qdisc show" for incative deivices.

After 59cc1f61f ("net: sched: convert qdisc linked list to hashtable")
it triggered when classful qdisc is added to inactive device because
default qdiscs are added before switching root qdisc.

Anyway after commit ea3274695353 ("net: sched: avoid duplicates in
qdisc dump") duplicates are filtered right in dumper.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>

net_sched/sfq: update hierarchical backlog when drop packet

When sfq_enqueue() drops head packet or packet from another queue it
have to update backlog at upper qdiscs too.

Fixes: 2ccccf5fb43f ("net_sched: update hierarchical backlog too")
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net_sched: reset pointers to tcf blocks in classful qdiscs' destructors

Traffic filters could keep direct pointers to classes in classful qdisc,
thus qdisc destruction first removes all filters before freeing classes.
Class destruction methods also tries to free attached filters but now
this isn't safe because tcf_block_put() unlike to tcf_destroy_chain()
cannot be called second time.

This patch set class->block to NULL after first tcf_block_put() and
turn second call into no-op.

Fixes: 6529eaba33f0 ("net: sched: introduce tcf block infractructure")
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

ipv4: fix NULL dereference in free_fib_info_rcu()

If fi->fib_metrics could not be allocated in fib_create_info()
we attempt to dereference a NULL pointer in free_fib_info_rcu() :

    m = fi->fib_metrics;
    if (m != &dst_default_metrics && atomic_dec_and_test(&m->refcnt))
            kfree(m);

Before my recent patch, we used to call kfree(NULL) and nothing wrong
happened.

Instead of using RCU to defer freeing while we are under memory stress,
it seems better to take immediate action.

This was reported by syzkaller team.

Fixes: 3fb07daff8e9 ("ipv4: add reference counting to metrics")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: Fix a typo in comment about sock flags.

Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

ipv6: fix NULL dereference in ip6_route_dev_notify()

Based on a syzkaller report [1], I found that a per cpu allocation
failure in snmp6_alloc_dev() would then lead to NULL dereference in
ip6_route_dev_notify().

It seems this is a very old bug, thus no Fixes tag in this submission.

Let's add in6_dev_put_clear() helper, as we will probably use
it elsewhere (once available/present in net-next)

[1]
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 17294 Comm: syz-executor6 Not tainted 4.13.0-rc2+ #10
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88019f456680 task.stack: ffff8801c6e58000
RIP: 0010:__read_once_size include/linux/compiler.h:250 [inline]
RIP: 0010:atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP: 0010:refcount_sub_and_test+0x7d/0x1b0 lib/refcount.c:178
RSP: 0018:ffff8801c6e5f1b0 EFLAGS: 00010202
RAX: 0000000000000037 RBX: dffffc0000000000 RCX: ffffc90005d25000
RDX: ffff8801c6e5f218 RSI: ffffffff82342bbf RDI: 0000000000000001
RBP: ffff8801c6e5f240 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff10038dcbe37
R13: 0000000000000006 R14: 0000000000000001 R15: 00000000000001b8
FS:  00007f21e0429700(0000) GS:ffff8801dc100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001ddbc22000 CR3: 00000001d632b000 CR4: 00000000001426e0
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
refcount_dec_and_test+0x1a/0x20 lib/refcount.c:211
in6_dev_put include/net/addrconf.h:335 [inline]
ip6_route_dev_notify+0x1c9/0x4a0 net/ipv6/route.c:3732
notifier_call_chain+0x136/0x2c0 kernel/notifier.c:93
__raw_notifier_call_chain kernel/notifier.c:394 [inline]
raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401
call_netdevice_notifiers_info+0x51/0x90 net/core/dev.c:1678
call_netdevice_notifiers net/core/dev.c:1694 [inline]
rollback_registered_many+0x91c/0xe80 net/core/dev.c:7107
rollback_registered+0x1be/0x3c0 net/core/dev.c:7149
register_netdevice+0xbcd/0xee0 net/core/dev.c:7587
register_netdev+0x1a/0x30 net/core/dev.c:7669
loopback_net_init+0x76/0x160 drivers/net/loopback.c:214
ops_init+0x10a/0x570 net/core/net_namespace.c:118
setup_net+0x313/0x710 net/core/net_namespace.c:294
copy_net_ns+0x27c/0x580 net/core/net_namespace.c:418
create_new_namespaces+0x425/0x880 kernel/nsproxy.c:107
unshare_nsproxy_namespaces+0xae/0x1e0 kernel/nsproxy.c:206
SYSC_unshare kernel/fork.c:2347 [inline]
SyS_unshare+0x653/0xfa0 kernel/fork.c:2297
entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x4512c9
RSP: 002b:00007f21e0428c08 EFLAGS: 00000216 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 0000000000718150 RCX: 00000000004512c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000062020200
RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000216 R12: 00000000004b973d
R13: 00000000ffffffff R14: 000000002001d000 R15: 00000000000002dd
Code: 50 2b 34 82 c7 00 f1 f1 f1 f1 c7 40 04 04 f2 f2 f2 c7 40 08 f3 f3
f3 f3 e8 a1 43 39 ff 4c 89 f8 48 8b 95 70 ff ff ff 48 c1 e8 03 <0f> b6
0c 18 4c 89 f8 83 e0 07 83 c0 03 38 c8 7c 08 84 c9 0f 85
RIP: __read_once_size include/linux/compiler.h:250 [inline] RSP:
ffff8801c6e5f1b0
RIP: atomic_read arch/x86/include/asm/atomic.h:26 [inline] RSP:
ffff8801c6e5f1b0
RIP: refcount_sub_and_test+0x7d/0x1b0 lib/refcount.c:178 RSP:
ffff8801c6e5f1b0
---[ end trace e441d046c6410d31 ]---

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge tag 'wireless-drivers-for-davem-2017-08-15' of git://git./linux/kernel/git/kvalo/wireless-drivers

Kalle Valo says:

====================
wireless-drivers fixes for 4.13

This time quite a few fixes for iwlwifi and one major regression fix
for brcmfmac. For the iwlwifi aggregation bug a small change was
needed for mac80211, but as Johannes is still away the mac80211 patch
is taken via wireless-drivers tree.

brcmfmac

* fix firmware crash (a recent regression in bcm4343{0,1,8}

iwlwifi

* Some simple PCI HW ID fix-ups and additions for family 9000

* Remove a bogus warning message with new FWs (bug #196915)

* Don't allow illegal channel options to be used (bug #195299)

* A fix for checksum offload in family 9000

* A fix serious throughput degradation in 11ac with multiple streams

* An old bug in SMPS where the firmware was not aware of SMPS changes

* Fix a memory leak in the SAR code

* Fix a stuck queue case in AP mode;

* Convert a WARN to a simple debug in a legitimate race case (from
which we can recover)

* Fix a severe throughput aggregation on 9000-family devices due to
aggregation issues, needed a small change in mac80211
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

tcp: fix possible deadlock in TCP stack vs BPF filter

Filtering the ACK packet was not put at the right place.

At this place, we already allocated a child and put it
into accept queue.

We absolutely need to call tcp_child_process() to release
its spinlock, or we will deadlock at accept() or close() time.

Found by syzkaller team (Thanks a lot !)

Fixes: 8fac365f63c8 ("tcp: Add a tcp_filter hook before handle ack packet")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Chenbo Feng <fengc@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

dccp: purge write queue in dccp_destroy_sock()

syzkaller reported that DCCP could have a non empty
write queue at dismantle time.

WARNING: CPU: 1 PID: 2953 at net/core/stream.c:199 sk_stream_kill_queues+0x3ce/0x520 net/core/stream.c:199
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 2953 Comm: syz-executor0 Not tainted 4.13.0-rc4+ #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:16 [inline]
dump_stack+0x194/0x257 lib/dump_stack.c:52
panic+0x1e4/0x417 kernel/panic.c:180
__warn+0x1c4/0x1d9 kernel/panic.c:541
report_bug+0x211/0x2d0 lib/bug.c:183
fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:190
do_trap_no_signal arch/x86/kernel/traps.c:224 [inline]
do_trap+0x260/0x390 arch/x86/kernel/traps.c:273
do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:310
do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:323
invalid_op+0x1e/0x30 arch/x86/entry/entry_64.S:846
RIP: 0010:sk_stream_kill_queues+0x3ce/0x520 net/core/stream.c:199
RSP: 0018:ffff8801d182f108 EFLAGS: 00010297
RAX: ffff8801d1144140 RBX: ffff8801d13cb280 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff85137b00 RDI: ffff8801d13cb280
RBP: ffff8801d182f148 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d13cb4d0
R13: ffff8801d13cb3b8 R14: ffff8801d13cb300 R15: ffff8801d13cb3b8
inet_csk_destroy_sock+0x175/0x3f0 net/ipv4/inet_connection_sock.c:835
dccp_close+0x84d/0xc10 net/dccp/proto.c:1067
inet_release+0xed/0x1c0 net/ipv4/af_inet.c:425
sock_release+0x8d/0x1e0 net/socket.c:597
sock_close+0x16/0x20 net/socket.c:1126
__fput+0x327/0x7e0 fs/file_table.c:210
____fput+0x15/0x20 fs/file_table.c:246
task_work_run+0x18a/0x260 kernel/task_work.c:116
exit_task_work include/linux/task_work.h:21 [inline]
do_exit+0xa32/0x1b10 kernel/exit.c:865
do_group_exit+0x149/0x400 kernel/exit.c:969
get_signal+0x7e8/0x17e0 kernel/signal.c:2330
do_signal+0x94/0x1ee0 arch/x86/kernel/signal.c:808
exit_to_usermode_loop+0x21c/0x2d0 arch/x86/entry/common.c:157
prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline]
syscall_return_slowpath+0x3a7/0x450 arch/x86/entry/common.c:263

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

udp: fix linear skb reception with PEEK_OFF

copy_linear_skb() is broken; both of its callers actually
expect 'len' to be the amount we are trying to copy,
not the offset of the end.
Fix it keeping the meanings of arguments in sync with what the
callers (both of them) expect.
Also restore a saner behavior on EFAULT (i.e. preserving
the iov_iter position in case of failure):

The commit fd851ba9caa9 ("udp: harden copy_linear_skb()")
avoids the more destructive effect of the buggy
copy_linear_skb(), e.g. no more invalid memory access, but
said function still behaves incorrectly: when peeking with
offset it can fail with EINVAL instead of copying the
appropriate amount of memory.

Reported-by: Sasha Levin <alexander.levin@verizon.com>
Fixes: b65ac44674dd ("udp: try to avoid 2 cache miss on dequeue")
Fixes: fd851ba9caa9 ("udp: harden copy_linear_skb()")
Signed-off-by: Al Viro <viro@ZenIV.linux.org.uk>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Tested-by: Sasha Levin <alexander.levin@verizon.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

ipv6: release rt6->rt6i_idev properly during ifdown

When a dst is created by addrconf_dst_alloc() for a host route or an
anycast route, dst->dev points to loopback dev while rt6->rt6i_idev
points to a real device.
When the real device goes down, the current cleanup code only checks for
dst->dev and assumes rt6->rt6i_idev->dev is the same. This causes the
refcount leak on the real device in the above situation.
This patch makes sure to always release the refcount taken on
rt6->rt6i_idev during dst_dev_put().

Fixes: 587fea741134 ("ipv6: mark DST_NOGC and remove the operation of
dst_free()")
Reported-by: John Stultz <john.stultz@linaro.org>
Tested-by: John Stultz <john.stultz@linaro.org>
Tested-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Wei Wang <weiwan@google.com>
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

af_key: do not use GFP_KERNEL in atomic contexts

pfkey_broadcast() might be called from non process contexts,
we can not use GFP_KERNEL in these cases [1].

This patch partially reverts commit ba51b6be38c1 ("net: Fix RCU splat in
af_key"), only keeping the GFP_ATOMIC forcing under rcu_read_lock()
section.

[1] : syzkaller reported :

in_atomic(): 1, irqs_disabled(): 0, pid: 2932, name: syzkaller183439
3 locks held by syzkaller183439/2932:
#0:  (&net->xfrm.xfrm_cfg_mutex){+.+.+.}, at: [<ffffffff83b43888>] pfkey_sendmsg+0x4c8/0x9f0 net/key/af_key.c:3649
#1:  (&pfk->dump_lock){+.+.+.}, at: [<ffffffff83b467f6>] pfkey_do_dump+0x76/0x3f0 net/key/af_key.c:293
#2:  (&(&net->xfrm.xfrm_policy_lock)->rlock){+...+.}, at: [<ffffffff83957632>] spin_lock_bh include/linux/spinlock.h:304 [inline]
#2:  (&(&net->xfrm.xfrm_policy_lock)->rlock){+...+.}, at: [<ffffffff83957632>] xfrm_policy_walk+0x192/0xa30 net/xfrm/xfrm_policy.c:1028
CPU: 0 PID: 2932 Comm: syzkaller183439 Not tainted 4.13.0-rc4+ #24
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:16 [inline]
dump_stack+0x194/0x257 lib/dump_stack.c:52
___might_sleep+0x2b2/0x470 kernel/sched/core.c:5994
__might_sleep+0x95/0x190 kernel/sched/core.c:5947
slab_pre_alloc_hook mm/slab.h:416 [inline]
slab_alloc mm/slab.c:3383 [inline]
kmem_cache_alloc+0x24b/0x6e0 mm/slab.c:3559
skb_clone+0x1a0/0x400 net/core/skbuff.c:1037
pfkey_broadcast_one+0x4b2/0x6f0 net/key/af_key.c:207
pfkey_broadcast+0x4ba/0x770 net/key/af_key.c:281
dump_sp+0x3d6/0x500 net/key/af_key.c:2685
xfrm_policy_walk+0x2f1/0xa30 net/xfrm/xfrm_policy.c:1042
pfkey_dump_sp+0x42/0x50 net/key/af_key.c:2695
pfkey_do_dump+0xaa/0x3f0 net/key/af_key.c:299
pfkey_spddump+0x1a0/0x210 net/key/af_key.c:2722
pfkey_process+0x606/0x710 net/key/af_key.c:2814
pfkey_sendmsg+0x4d6/0x9f0 net/key/af_key.c:3650
sock_sendmsg_nosec net/socket.c:633 [inline]
sock_sendmsg+0xca/0x110 net/socket.c:643
___sys_sendmsg+0x755/0x890 net/socket.c:2035
__sys_sendmsg+0xe5/0x210 net/socket.c:2069
SYSC_sendmsg net/socket.c:2080 [inline]
SyS_sendmsg+0x2d/0x50 net/socket.c:2076
entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x445d79
RSP: 002b:00007f32447c1dc8 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000445d79
RDX: 0000000000000000 RSI: 000000002023dfc8 RDI: 0000000000000008
RBP: 0000000000000086 R08: 00007f32447c2700 R09: 00007f32447c2700
R10: 00007f32447c2700 R11: 0000000000000202 R12: 0000000000000000
R13: 00007ffe33edec4f R14: 00007f32447c29c0 R15: 0000000000000000

Fixes: ba51b6be38c1 ("net: Fix RCU splat in af_key")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Cc: David Ahern <dsa@cumulusnetworks.com>
Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tcp: ulp: avoid module refcnt leak in tcp_set_ulp

__tcp_ulp_find_autoload returns tcp_ulp_ops after taking a reference on
the module. Then, if ->init fails, tcp_set_ulp propagates the error but
nothing releases that reference.

Fixes: 734942cc4ea6 ("tcp: ULP infrastructure")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge branch 'Add-new-PCI_DEV_FLAGS_NO_RELAXED_ORDERING-flag'

Ding Tianhong says:

====================
Add new PCI_DEV_FLAGS_NO_RELAXED_ORDERING flag

Some devices have problems with Transaction Layer Packets with the Relaxed
Ordering Attribute set.  This patch set adds a new PCIe Device Flag,
PCI_DEV_FLAGS_NO_RELAXED_ORDERING, a set of PCI Quirks to catch some known
devices with Relaxed Ordering issues, and a use of this new flag by the
cxgb4 driver to avoid using Relaxed Ordering with problematic Root Complex
Ports.

It's been years since I've submitted kernel.org patches, I appolgise for the
almost certain submission errors.

v2: Alexander point out that the v1 was only a part of the whole solution,
    some platform which has some issues could use the new flag to indicate
    that it is not safe to enable relaxed ordering attribute, then we need
    to clear the relaxed ordering enable bits in the PCI configuration when
    initializing the device. So add a new second patch to modify the PCI
    initialization code to clear the relaxed ordering enable bit in the
    event that the root complex doesn't want relaxed ordering enabled.

    The third patch was base on the v1's second patch and only be changed
    to query the relaxed ordering enable bit in the PCI configuration space
    to allow the Chelsio NIC to send TLPs with the relaxed ordering attributes
    set.

    This version didn't plan to drop the defines for Intel Drivers to use the
    new checking way to enable relaxed ordering because it is not the hardest
    part of the moment, we could fix it in next patchset when this patches
    reach the goal.

v3: Redesigned the logic for pci_configure_relaxed_ordering when configuration,
    If a PCIe device didn't enable the relaxed ordering attribute default,
    we should not do anything in the PCIe configuration, otherwise we
    should check if any of the devices above us do not support relaxed
    ordering by the PCI_DEV_FLAGS_NO_RELAXED_ORDERING flag, then base on
    the result if we get a return that indicate that the relaxed ordering
    is not supported we should update our device to disable relaxed ordering
    in configuration space. If the device above us doesn't exist or isn't
    the PCIe device, we shouldn't do anything and skip updating relaxed ordering
    because we are probably running in a guest.

v4: Rename the functions pcie_get_relaxed_ordering and pcie_disable_relaxed_ordering
    according John's suggestion, and modify the description, use the true/false
    as the return value.

    We shouldn't enable relaxed ordering attribute by the setting in the root
    complex configuration space for PCIe device, so fix it for cxgb4.

    Fix some format issues.

v5: Removed the unnecessary code for some function which only return the bool
    value, and add the check for VF device.

    Make this patch set base on 4.12-rc5.

v6: Fix the logic error in the need to enable the relaxed ordering attribute for cxgb4.

v7: The cxgb4 drivers will enable the PCIe Capability Device Control[Relaxed
    Ordering Enable] in PCI Probe() routine, this will break our current
    solution for some platform which has problematic when enable the relaxed
    ordering attribute. According to the latest recommendations, remove the
    enable_pcie_relaxed_ordering(), although it could not cover the Peer-to-Peer
    scene, but we agree to leave this problem until we really trigger it.

    Make this patch set base on 4.12 release version.

v8: Change the second patch title and description to make it more reasonable,
    add the acked-by from Alex and Ashok.

    Add a new patch to enable the Relaxed Ordering Attribute for cxgb4vf driver.

    Make this patch set base on 4.13-rc2.

v9: The document (https://software.intel.com/sites/default/files/managed/9e/
    bc/64-ia-32-architectures-optimization-manual.pdf) indicate that the Xeon
    processors based on Broadwell/Haswell microarchitecture has the problem
    with Relaxed Ordering Attribute enabled, so add the whole list Device ID
    from Intel to the patch.

v10: Significant rework based on Bjorn's feedback, reorganize the first 2 patches,
     now the Intel and AMD erratum soc has been divided to the different patches,
     rename the pcie_relaxed_ordering_supported() to pcie_relaxed_ordering_enabled(),
     and no need to check every intervening switch except the root ports, update
     some commits.

v11: We shouldn't let the Intel engineer to acked the AMD's erratum patch, fix the
     funny mistake.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

net/cxgb4vf: Use new PCI_DEV_FLAGS_NO_RELAXED_ORDERING flag

cxgb4vf Ethernet driver now queries PCIe configuration space to
determine if it can send TLPs to it with the Relaxed Ordering
Attribute set, just like the pf did.

Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Reviewed-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/cxgb4: Use new PCI_DEV_FLAGS_NO_RELAXED_ORDERING flag

cxgb4 Ethernet driver now queries PCIe configuration space to determine
if it can send TLPs to it with the Relaxed Ordering Attribute set.

Remove the enable_pcie_relaxed_ordering() to avoid enable PCIe Capability
Device Control[Relaxed Ordering Enable] at probe routine, to make sure
the driver will not send the Relaxed Ordering TLPs to the Root Complex which
could not deal the Relaxed Ordering TLPs.

Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Reviewed-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

PCI: Disable Relaxed Ordering Attributes for AMD A1100

Casey reported that the AMD ARM A1100 SoC has a bug in its PCIe
Root Port where Upstream Transaction Layer Packets with the Relaxed
Ordering Attribute clear are allowed to bypass earlier TLPs with
Relaxed Ordering set, it would cause Data Corruption, so we need
to disable Relaxed Ordering Attribute when Upstream TLPs to the
Root Port.

Reported-and-suggested-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Acked-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

PCI: Disable Relaxed Ordering for some Intel processors

According to the Intel spec section 3.9.1 said:

    3.9.1 Optimizing PCIe Performance for Accesses Toward Coherent Memory
          and Toward MMIO Regions (P2P)

    In order to maximize performance for PCIe devices in the processors
    listed in Table 3-6 below, the soft- ware should determine whether the
    accesses are toward coherent memory (system memory) or toward MMIO
    regions (P2P access to other devices). If the access is toward MMIO
    region, then software can command HW to set the RO bit in the TLP
    header, as this would allow hardware to achieve maximum throughput for
    these types of accesses. For accesses toward coherent memory, software
    can command HW to clear the RO bit in the TLP header (no RO), as this
    would allow hardware to achieve maximum throughput for these types of
    accesses.

    Table 3-6. Intel Processor CPU RP Device IDs for Processors Optimizing
               PCIe Performance

    Processor                            CPU RP Device IDs

    Intel Xeon processors based on       6F01H-6F0EH
    Broadwell microarchitecture

    Intel Xeon processors based on       2F01H-2F0EH
    Haswell microarchitecture

It means some Intel processors has performance issue when use the Relaxed
Ordering Attribute, so disable Relaxed Ordering for these root port.

Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Acked-by: Alexander Duyck <alexander.h.duyck@intel.com>
Acked-by: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

PCI: Disable PCIe Relaxed Ordering if unsupported

When bit4 is set in the PCIe Device Control register, it indicates
whether the device is permitted to use relaxed ordering.
On some platforms using relaxed ordering can have performance issues or
due to erratum can cause data-corruption. In such cases devices must avoid
using relaxed ordering.

The patch adds a new flag PCI_DEV_FLAGS_NO_RELAXED_ORDERING to indicate that
Relaxed Ordering (RO) attribute should not be used for Transaction Layer
Packets (TLP) targeted towards these affected root complexes.

This patch checks if there is any node in the hierarchy that indicates that
using relaxed ordering is not safe. In such cases the patch turns off the
relaxed ordering by clearing the capability for this device.

Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Acked-by: Ashok Raj <ashok.raj@intel.com>
Acked-by: Alexander Duyck <alexander.h.duyck@intel.com>
Acked-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tipc: avoid inheriting msg_non_seq flag when message is returned

In the function msg_reverse(), we reverse the header while trying to
reuse the original buffer whenever possible. Those rejected/returned
messages are always transmitted as unicast, but the msg_non_seq field
is not explicitly set to zero as it should be.

We have seen cases where multicast senders set the message type to
"NOT dest_droppable", meaning that a multicast message shorter than
one MTU will be returned, e.g., during receive buffer overflow, by
reusing the original buffer. This has the effect that even the
'msg_non_seq' field is inadvertently inherited by the rejected message,
although it is now sent as a unicast message. This again leads the
receiving unicast link endpoint to steer the packet toward the broadcast
link receive function, where it is dropped. The affected unicast link is
thereafter (after 100 failed retransmissions) declared 'stale' and
reset.

We fix this by unconditionally setting the 'msg_non_seq' flag to zero
for all rejected/returned messages.

Reported-by: Canh Duc Luu <canh.d.luu@dektech.com.au>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tipc: accept PACKET_MULTICAST packets

On L2 bearers, the TIPC broadcast function is sending out packets using
the corresponding L2 broadcast address. At reception, we filter such
packets under the assumption that they will also be delivered as
broadcast packets.

This assumption doesn't always hold true. Under high load, we have seen
that a switch may convert the destination address and deliver the packet
as a PACKET_MULTICAST, something leading to inadvertently dropped
packets and a stale and reset broadcast link.

We fix this by extending the reception filtering to accept packets of
type PACKET_MULTICAST.

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

ipv4: route: fix inet_rtm_getroute induced crash

"ip route get $daddr iif eth0 from $saddr" causes:
BUG: KASAN: use-after-free in ip_route_input_rcu+0x1535/0x1b50
Call Trace:
  ip_route_input_rcu+0x1535/0x1b50
  ip_route_input_noref+0xf9/0x190
  tcp_v4_early_demux+0x1a4/0x2b0
  ip_rcv+0xbcb/0xc05
  __netif_receive_skb+0x9c/0xd0
  netif_receive_skb_internal+0x5a8/0x890

Problem is that inet_rtm_getroute calls either ip_route_input_rcu (if an
iif was provided) or ip_route_output_key_hash_rcu.

But ip_route_input_rcu, unlike ip_route_output_key_hash_rcu, already
associates the dst_entry with the skb.  This clears the SKB_DST_NOREF
bit (i.e. skb_dst_drop will release/free the entry while it should not).

Thus only set the dst if we called ip_route_output_key_hash_rcu().

I tested this patch by running:
while true;do ip r get 10.0.1.2;done > /dev/null &
while true;do ip r get 10.0.1.2 iif eth0  from 10.0.1.1;done > /dev/null &
... and saw no crash or memory leak.

Cc: Roopa Prabhu <roopa@cumulusnetworks.com>
Cc: David Ahern <dsahern@gmail.com>
Fixes: ba52d61e0ff ("ipv4: route: restore skb_dst_set in inet_rtm_getroute")
Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

brcmfmac: feature check for multi-scheduled scan fails on bcm4343x devices

The firmware feature check introduced for multi-scheduled scan turned out
to be failing for bcm4343{0,1,8} devices resulting in a firmware crash.
The reason for this crash has not yet been root cause so this patch avoids
the feature check for those device as a short-term fix.

Reported-by: Stefan Wahren <stefan.wahren@i2se.com>
Reported-by: Ian Molton <ian@mnementh.co.uk>
Fixes: 9fe929aaace6 ("brcmfmac: add firmware feature detection for gscan feature")
Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

bonding: ratelimit failed speed/duplex update warning

bond_miimon_commit() handles the UP transition for each slave of a bond
in the case of MII. It is triggered 10 times per second for the default
MII Polling interval of 100ms. For device drivers that do not implement
__ethtool_get_link_ksettings() the call to bond_update_speed_duplex()
fails persistently while the MII status could remain UP. That is, in
this and other cases where the speed/duplex update keeps failing over a
longer period of time while the MII state is UP, a warning is printed
every MII polling interval.

To address these excessive warnings net_ratelimit() should be used.
Printing a warning once would not be sufficient since the call to
bond_update_speed_duplex() could recover to succeed and fail again
later. In that case there would be no new indication what went wrong.

Fixes: b5bf0f5b16b9c (bonding: correctly update link status during mii-commit phase)
Signed-off-by: Andreas Born <futur.andy@googlemail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

udp: harden copy_linear_skb()

syzkaller got crashes with CONFIG_HARDENED_USERCOPY=y configs.

Issue here is that recvfrom() can be used with user buffer of Z bytes,
and SO_PEEK_OFF of X bytes, from a skb with Y bytes, and following
condition :

Z < X < Y

kernel BUG at mm/usercopy.c:72!
invalid opcode: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 2917 Comm: syzkaller842281 Not tainted 4.13.0-rc3+ #16
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
task: ffff8801d2fa40c0 task.stack: ffff8801d1fe8000
RIP: 0010:report_usercopy mm/usercopy.c:64 [inline]
RIP: 0010:__check_object_size+0x3ad/0x500 mm/usercopy.c:264
RSP: 0018:ffff8801d1fef8a8 EFLAGS: 00010286
RAX: 0000000000000078 RBX: ffffffff847102c0 RCX: 0000000000000000
RDX: 0000000000000078 RSI: 1ffff1003a3fded5 RDI: ffffed003a3fdf09
RBP: ffff8801d1fef998 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d1ea480e
R13: fffffffffffffffa R14: ffffffff84710280 R15: dffffc0000000000
FS:  0000000001360880(0000) GS:ffff8801dc000000(0000)
knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000202ecfe4 CR3: 00000001d1ff8000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
check_object_size include/linux/thread_info.h:108 [inline]
check_copy_size include/linux/thread_info.h:139 [inline]
copy_to_iter include/linux/uio.h:105 [inline]
copy_linear_skb include/net/udp.h:371 [inline]
udpv6_recvmsg+0x1040/0x1af0 net/ipv6/udp.c:395
inet_recvmsg+0x14c/0x5f0 net/ipv4/af_inet.c:793
sock_recvmsg_nosec net/socket.c:792 [inline]
sock_recvmsg+0xc9/0x110 net/socket.c:799
SYSC_recvfrom+0x2d6/0x570 net/socket.c:1788
SyS_recvfrom+0x40/0x50 net/socket.c:1760
entry_SYSCALL_64_fastpath+0x1f/0xbe

Fixes: b65ac44674dd ("udp: try to avoid 2 cache miss on dequeue")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge branch 'bpf-Minor-fix-in-bpf_convert_ctx_access'

Daniel Borkmann says:

====================
bpf: Minor fix in bpf_convert_ctx_access

First one was found while trying to compile the kernel
with !CONFIG_NET_RX_BUSY_POLL.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

bpf: fix two missing target_size settings in bpf_convert_ctx_access

When CONFIG_NET_SCHED or CONFIG_NET_RX_BUSY_POLL is /not/ set and
we try a narrow __sk_buff load of tc_index or napi_id, respectively,
then verifier rightfully complains that it's misconfigured, because
we need to set target_size in each of the two cases. The rewrite
for the ctx access is just a dummy op, but needs to pass, so fix
this up.

Fixes: f96da09473b5 ("bpf: simplify narrower ctx access")
Reported-by: Shubham Bansal <illusionist.neo@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: fix compilation when busy poll is not enabled

MIN_NAPI_ID is used in various places outside of
CONFIG_NET_RX_BUSY_POLL wrapping, so when it's not set
we run into build errors such as:

  net/core/dev.c: In function 'dev_get_by_napi_id':
  net/core/dev.c:886:16: error: ‘MIN_NAPI_ID’ undeclared (first use in this function)
    if (napi_id < MIN_NAPI_ID)
                  ^~~~~~~~~~~

Thus, have MIN_NAPI_ID always defined to fix these errors.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

mISDN: Fix null pointer dereference at mISDN_FsmNew

If mISDN_FsmNew() fails to allocate memory for jumpmatrix
then null pointer dereference will occur on any write to
jumpmatrix.

The patch adds check on successful allocation and
corresponding error handling.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Anton Vasilyev <vasilyev@ispras.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>

nfp: do not update MTU from BH in flower app

The Flower app may receive a request to update the MTU of a representor
netdev upon receipt of a control message from the firmware. This requires
the RTNL lock which needs to be taken outside of the packet processing
path.

As a handling of this correctly seems a little to invasive for a fix simply
skip setting the MTU for now.

Relevant backtrace:
[ 1496.288489] BUG: scheduling while atomic: kworker/0:3/373/0x00000100
[ 1496.294911]  dca syscopyarea sysfillrect sysimgblt fb_sys_fops ptp drm mxm_wmi ahci pps_core libahci i2c_algo_bit wmi [last unloaded: nfp]
[ 1496.294918] CPU: 0 PID: 373 Comm: kworker/0:3 Tainted: G           OE   4.13.0-rc3+ #3
[ 1496.294919] Hardware name: Supermicro X10DRi/X10DRi, BIOS 2.0 12/28/2015
[ 1496.294923] Workqueue: events work_for_cpu_fn
[ 1496.294924] Call Trace:
[ 1496.294927]  <IRQ>
[ 1496.294931]  dump_stack+0x63/0x82
[ 1496.294935]  __schedule_bug+0x54/0x70
[ 1496.294937]  __schedule+0x62f/0x890
[ 1496.294941]  ? intel_unmap_sg+0x90/0x90
[ 1496.294942]  schedule+0x36/0x80
[ 1496.294943]  schedule_preempt_disabled+0xe/0x10
[ 1496.294945]  __mutex_lock.isra.2+0x445/0x4a0
[ 1496.294947]  ? device_is_rmrr_locked+0x12/0x50
[ 1496.294950]  ? kfree+0x162/0x170
[ 1496.294952]  ? device_is_rmrr_locked+0x12/0x50
[ 1496.294953]  ? iommu_should_identity_map+0x50/0xe0
[ 1496.294954]  __mutex_lock_slowpath+0x13/0x20
[ 1496.294955]  ? iommu_no_mapping+0x48/0xd0
[ 1496.294956]  ? __mutex_lock_slowpath+0x13/0x20
[ 1496.294957]  mutex_lock+0x2f/0x40
[ 1496.294960]  rtnl_lock+0x15/0x20
[ 1496.294979]  nfp_flower_cmsg_rx+0xc8/0x150 [nfp]
[ 1496.294986]  nfp_ctrl_poll+0x286/0x350 [nfp]
[ 1496.294989]  tasklet_action+0xf6/0x110
[ 1496.294992]  __do_softirq+0xed/0x278
[ 1496.294993]  irq_exit+0xb6/0xc0
[ 1496.294994]  do_IRQ+0x4f/0xd0
[ 1496.294996]  common_interrupt+0x89/0x89

Fixes: 948faa46c05b ("nfp: add support for control messages for flower app")
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: stmmac: Use the right logging function in stmmac_mdio_register

Currently, the function stmmac_mdio_register() is only used by
stmmac_dvr_probe() from stmmac_main.c, in order to register the MDIO bus
and probe information about the PHY. As this function is called before
calling register_netdev(), all messages logged from stmmac_mdio_register
are prefixed by "(unnamed net_device)". The goal of netdev_info or
netdev_err is to dump useful infos about a net_device, when this data
structure is partially initialized, there is no point for using these
functions.

This commit fixes the issue by replacing all netdev_*() by the
corresponding dev_*() function for logging. The last netdev_info is
replaced by phy_attached_info(), as a valid phydev can be used at this
point.

Signed-off-by: Romain Perier <romain.perier@collabora.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/sched/hfsc: allocate tcf block for hfsc root class

Without this filters cannot be attached.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Fixes: 6529eaba33f0 ("net: sched: introduce tcf block infractructure")
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

bonding: require speed/duplex only for 802.3ad, alb and tlb

The patch c4adfc822bf5 ("bonding: make speed, duplex setting consistent
with link state") puts the link state to down if
bond_update_speed_duplex() cannot retrieve speed and duplex settings.
Assumably the patch was written with 802.3ad mode in mind which relies
on link speed/duplex settings. For other modes like active-backup these
settings are not required. Thus, only for these other modes, this patch
reintroduces support for slaves that do not support reporting speed or
duplex such as wireless devices. This fixes the regression reported in
bug 196547 (https://bugzilla.kernel.org/show_bug.cgi?id=196547).

Fixes: c4adfc822bf5 ("bonding: make speed, duplex setting consistent
with link state")
Signed-off-by: Andreas Born <futur.andy@googlemail.com>
Acked-by: Mahesh Bandewar <maheshb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: dsa: ksz: fix skb freeing

The DSA layer frees the original skb when an xmit function returns NULL,
meaning an error occurred. But if the tagging code copied the original
skb, it is responsible of freeing the copy if an error occurs.

The ksz tagging code currently has two issues: if skb_put_padto fails,
the skb copy is not freed, and the original skb will be freed twice.

To fix that, move skb_put_padto inside both branches of the skb_tailroom
condition, before freeing the original skb, and free the copy on error.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Woojung Huh <woojung.huh@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller:

1) Fix handling of initial STATE message in TIPC, from Jon Paul Maloy.

2) Fix stats handling in bcm_sysport_get_stats(), from Florian
    Fainelli.

3) Reject 16777215 VNI value in geneve_validate(), from Girish
    Moodalbail.

4) Fix initial IGMP sysctl setting regression, from Nikolay Borisov.

5) Once a UFO fragmented frame is treated as UFO, we should continue
    doing so. Likewise once a frame has been segmented, we should
    continue doing that and not try to convert it to a UFO frame. From
    Willem de Bruijn.

6) Test the AF_PACKET RX/TX ring pg_vec state under the socket lock to
    prevent races. From Willem de Bruijn.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  packet: fix tp_reserve race in packet_set_ring
  udp: consistently apply ufo or fragmentation
  net: sched: set xt_tgchk_param par.nft_compat as 0 in ipt_init_target
  igmp: Fix regression caused by igmp sysctl namespace code.
  geneve: maximum value of VNI cannot be used
  net: systemport: Fix software statistics for SYSTEMPORT Lite
  tipc: remove premature ESTABLISH FSM event at link synchronization

packet: fix tp_reserve race in packet_set_ring

Updates to tp_reserve can race with reads of the field in
packet_set_ring. Avoid this by holding the socket lock during
updates in setsockopt PACKET_RESERVE.

This bug was discovered by syzkaller.

Fixes: 8913336a7e8d ("packet: add PACKET_RESERVE sockopt")
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

udp: consistently apply ufo or fragmentation

When iteratively building a UDP datagram with MSG_MORE and that
datagram exceeds MTU, consistently choose UFO or fragmentation.

Once skb_is_gso, always apply ufo. Conversely, once a datagram is
split across multiple skbs, do not consider ufo.

Sendpage already maintains the first invariant, only add the second.
IPv6 does not have a sendpage implementation to modify.

A gso skb must have a partial checksum, do not follow sk_no_check_tx
in udp_send_skb.

Found by syzkaller.

Fixes: e89e9cf539a2 ("[IPv4/IPv6]: UFO Scatter-gather approach")
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge git://git./linux/kernel/git/davem/sparc

Pull sparc updates from David Miller:

1) Recognize M8 cpus, just basic chip ID matching, from Allen Pais.

2) Prevent crashes when bringing up sunvdc virtual block devices in
    some environments. From Jim Quigley.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sunvdc: prevent sunvdc panic when mpgroup disk added to guest domain
  sparc64: Increase max_phys_bits to 51 and VA bits to 53 for M8.
  sparc64: recognize and support sparc M8 cpu type
  sparc64: properly name the cpu constants

net: sched: set xt_tgchk_param par.nft_compat as 0 in ipt_init_target

Commit 55917a21d0cc ("netfilter: x_tables: add context to know if
extension runs from nft_compat") introduced a member nft_compat to
xt_tgchk_param structure.

But it didn't set it's value for ipt_init_target. With unexpected
value in par.nft_compat, it may return unexpected result in some
target's checkentry.

This patch is to set all it's fields as 0 and only initialize the
non-zero fields in ipt_init_target.

v1->v2:
As Wang Cong's suggestion, fix it by setting all it's fields as
0 and only initializing the non-zero fields.

Fixes: 55917a21d0cc ("netfilter: x_tables: add context to know if extension runs from nft_compat")
Suggested-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

igmp: Fix regression caused by igmp sysctl namespace code.

Commit dcd87999d415 ("igmp: net: Move igmp namespace init to correct file")
moved the igmp sysctls initialization from tcp_sk_init to igmp_net_init. This
function is only called as part of per-namespace initialization, only if
CONFIG_IP_MULTICAST is defined, otherwise igmp_mc_init() call in ip_init is
compiled out, casuing the igmp pernet ops to not be registerd and those sysctl
being left initialized with 0. However, there are certain functions, such as
ip_mc_join_group which are always compiled and make use of some of those
sysctls. Let's do a partial revert of the aforementioned commit and move the
sysctl initialization into inet_init_net, that way they will always have
sane values.

Fixes: dcd87999d415 ("igmp: net: Move igmp namespace init to correct file")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=196595
Reported-by: Gerardo Exequiel Pozzi <vmlinuz386@gmail.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

geneve: maximum value of VNI cannot be used

Geneve's Virtual Network Identifier (VNI) is 24 bit long, so the range
of values for it would be from 0 to 16777215 (2^24 -1). However, one
cannot create a geneve device with VNI set to 16777215. This patch fixes
this issue.

Signed-off-by: Girish Moodalbail <girish.moodalbail@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: systemport: Fix software statistics for SYSTEMPORT Lite

With SYSTEMPORT Lite we have holes in our statistics layout that make us
skip over the hardware MIB counters, bcm_sysport_get_stats() was not
taking that into account resulting in reporting 0 for all SW-maintained
statistics, fix this by skipping accordingly.

Fixes: 44a4524c54af ("net: systemport: Add support for SYSTEMPORT Lite")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tipc: remove premature ESTABLISH FSM event at link synchronization

When a link between two nodes come up, both endpoints will initially
send out a STATE message to the peer, to increase the probability that
the peer endpoint also is up when the first traffic message arrives.
Thereafter, if the establishing link is the second link between two
nodes, this first "traffic" message is a TUNNEL_PROTOCOL/SYNCH message,
helping the peer to perform initial synchronization between the two
links.

However, the initial STATE message may be lost, in which case the SYNCH
message will be the first one arriving at the peer. This should also
work, as the SYNCH message itself will be used to take up the link
endpoint before initializing synchronization.

Unfortunately the code for this case is broken. Currently, the link is
brought up through a tipc_link_fsm_evt(ESTABLISHED) when a SYNCH
arrives, whereupon __tipc_node_link_up() is called to distribute the
link slots and take the link into traffic. But, __tipc_node_link_up() is
itself starting with a test for whether the link is up, and if true,
returns without action. Clearly, the tipc_link_fsm_evt(ESTABLISHED) call
is unnecessary, since tipc_node_link_up() is itself issuing such an
event, but also harmful, since it inhibits tipc_node_link_up() to
perform the test of its tasks, and the link endpoint in question hence
is never taken into traffic.

This problem has been exposed when we set up dual links between pre-
and post-4.4 kernels, because the former ones don't send out the
initial STATE message described above.

We fix this by removing the unnecessary event call.

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

sunvdc: prevent sunvdc panic when mpgroup disk added to guest domain

Using mpgroup to define multiple paths for a virtual disk causes multiple
virtual-device-port ports to be created for that virtual device.
Each virtual-device-port port then gets a vdisk created for it by the Linux
sunvdc driver. As mpgroup is not supported by the Linux sunvdc driver it
cannot handle multiple ports for a single vdisk, leading to a kernel panic
at startup.

This fix prevents more than one vdisk per virtual-device-port being created
until full virtual disk multipathing (mpgroup) support is implemented.

Signed-off-by: Jim Quigley <Jim.Quigley@oracle.com>
Reviewed-by: Liam Merwick <liam.merwick@oracle.com>
Reviewed-by: Shannon Nelson <shannon.nelson@oracle.com>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Reviewed-by: Aaron Young <aaron.young@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge tag 'pinctrl-v4.13-2' of git://git./linux/kernel/git/linusw/linux-pinctrl

Pull pin control fixes from Linus Walleij:
"These are the pin control fixes I have gathered since the return from
  my vacation. They boiled in -next a while so let's get them in.

  Apart from the documentation build it is purely driver fixes. Which is
  nice. The Intel fixes seem kind of important.

   - Fix the documentation build as the docs were moved

   - Correct the UART pin list on the Intel Merrifield

   - Fix pin assignment and number of pins on the Marvell Armada 37xx
     pin controller

   - Cover the Setzer models in the Chromebook DMI quirk in the Intel
     cheryview driver so they start working

   - Add the missing "sim" function to the sunxi driver

   - Fix USB pin definitions on Uniphier Pro4

   - Smatch fix for invalid reference in the zx pin control driver"

* tag 'pinctrl-v4.13-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
  pinctrl: generic: update references to Documentation/pinctrl.txt
  pinctrl: intel: merrifield: Correct UART pin lists
  pinctrl: armada-37xx: Fix number of pin in south bridge
  pinctrl: armada-37xx: Fix the pin 23 on south bridge
  pinctrl: cherryview: Add Setzer models to the Chromebook DMI quirk
  pinctrl: sunxi: add a missing function of A10/A20 pinctrl driver
  pinctrl: uniphier: fix USB3 pin assignment for Pro4
  pinctrl: zte: fix dereference of 'data' in zx_set_mux()

futex: Remove unnecessary warning from get_futex_key

Commit 65d8fc777f6d ("futex: Remove requirement for lock_page() in
get_futex_key()") removed an unnecessary lock_page() with the
side-effect that page->mapping needed to be treated very carefully.

Two defensive warnings were added in case any assumption was missed and
the first warning assumed a correct application would not alter a
mapping backing a futex key.  Since merging, it has not triggered for
any unexpected case but Mark Rutland reported the following bug
triggering due to the first warning.

  kernel BUG at kernel/futex.c:679!
  Internal error: Oops - BUG: 0 [#1] PREEMPT SMP
  Modules linked in:
  CPU: 0 PID: 3695 Comm: syz-executor1 Not tainted 4.13.0-rc3-00020-g307fec773ba3 #3
  Hardware name: linux,dummy-virt (DT)
  task: ffff80001e271780 task.stack: ffff000010908000
  PC is at get_futex_key+0x6a4/0xcf0 kernel/futex.c:679
  LR is at get_futex_key+0x6a4/0xcf0 kernel/futex.c:679
  pc : [<ffff00000821ac14>] lr : [<ffff00000821ac14>] pstate: 80000145

The fact that it's a bug instead of a warning was due to an unrelated
arm64 problem, but the warning itself triggered because the underlying
mapping changed.

This is an application issue but from a kernel perspective it's a
recoverable situation and the warning is unnecessary so this patch
removes the warning.  The warning may potentially be triggered with the
following test program from Mark although it may be necessary to adjust
NR_FUTEX_THREADS to be a value smaller than the number of CPUs in the
system.

    #include <linux/futex.h>
    #include <pthread.h>
    #include <stdio.h>
    #include <stdlib.h>
    #include <sys/mman.h>
    #include <sys/syscall.h>
    #include <sys/time.h>
    #include <unistd.h>

    #define NR_FUTEX_THREADS 16
    pthread_t threads[NR_FUTEX_THREADS];

    void *mem;

    #define MEM_PROT  (PROT_READ | PROT_WRITE)
    #define MEM_SIZE  65536

    static int futex_wrapper(int *uaddr, int op, int val,
                             const struct timespec *timeout,
                             int *uaddr2, int val3)
    {
        syscall(SYS_futex, uaddr, op, val, timeout, uaddr2, val3);
    }

    void *poll_futex(void *unused)
    {
        for (;;) {
            futex_wrapper(mem, FUTEX_CMP_REQUEUE_PI, 1, NULL, mem + 4, 1);
        }
    }

    int main(int argc, char *argv[])
    {
        int i;

        mem = mmap(NULL, MEM_SIZE, MEM_PROT,
               MAP_SHARED | MAP_ANONYMOUS, -1, 0);

        printf("Mapping @ %p\n", mem);

        printf("Creating futex threads...\n");

        for (i = 0; i < NR_FUTEX_THREADS; i++)
            pthread_create(&threads[i], NULL, poll_futex, NULL);

        printf("Flipping mapping...\n");
        for (;;) {
            mmap(mem, MEM_SIZE, MEM_PROT,
                 MAP_FIXED | MAP_SHARED | MAP_ANONYMOUS, -1, 0);
        }

        return 0;
    }

Reported-and-tested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Mel Gorman <mgorman@suse.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: stable@vger.kernel.org # 4.7+
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Merge branch 'i2c/for-current' of git://git./linux/kernel/git/wsa/linux

Pull i2c fixes from Wolfram Sang:
"The main thing is to allow empty id_tables for ACPI to make some
  drivers get probed again. It looks a bit bigger than usual because it
  needs some internal renaming, too.

  Other than that, there is a fix for broken DSTDs, a super simple
  enablement for ARM MPS, and two documentation fixes which I'd like to
  see in v4.13 already"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: rephrase explanation of I2C_CLASS_DEPRECATED
  i2c: allow i2c-versatile for ARM MPS platforms
  i2c: designware: Some broken DSTDs use 1MiHz instead of 1MHz
  i2c: designware: Print clock freq on invalid clock freq error
  i2c: core: Allow empty id_table in ACPI case as well
  i2c: mux: pinctrl: mention correct module name in Kconfig help text

Merge tag 'iwlwifi-for-kalle-2018-08-09' of git://git./linux/kernel/git/iwlwifi/iwlwifi-fixes

Some more fixes for 4.13

* Fix a memory leak in the SAR code;
* Fix a stuck queue case in AP mode;
* Convert a WARN to a simple debug in a legitimate race case (from
which we can recover);
* Fix a severe throughput aggregation on 9000-family devices due to
aggregation issues.

Merge branch 'for-linus' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
"Three patches that should go into this release.

  Two of them are from Paolo and fix up some corner cases with BFQ, and
  the last patch is from Ming and fixes up a potential usage count
  imbalance regression due to the recent NOWAIT work"

* 'for-linus' of git://git.kernel.dk/linux-block:
  blk-mq: don't leak preempt counter/q_usage_counter when allocating rq failed
  block, bfq: consider also in_service_entity to state whether an entity is active
  block, bfq: reset in_service_entity if it becomes idle

Merge branch 'linus' of git://git./linux/kernel/git/herbert/crypto-2.6

Pull crypto fixes from Herbert Xu:
"Fix two regressions in the inside-secure driver with respect to
  hmac(sha1)"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: inside-secure - fix the sha state length in hmac_sha1_setkey
  crypto: inside-secure - fix invalidation check in hmac_sha1_setkey

Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller:
"The pull requests are getting smaller, that's progress I suppose :-)

   1) Fix infinite loop in CIPSO option parsing, from Yujuan Qi.

   2) Fix remote checksum handling in VXLAN and GUE tunneling drivers,
      from Koichiro Den.

   3) Missing u64_stats_init() calls in several drivers, from Florian
      Fainelli.

   4) TCP can set the congestion window to an invalid ssthresh value
      after congestion window reductions, from Yuchung Cheng.

   5) Fix BPF jit branch generation on s390, from Daniel Borkmann.

   6) Correct MIPS ebpf JIT merge, from David Daney.

   7) Correct byte order test in BPF test_verifier.c, from Daniel
      Borkmann.

   8) Fix various crashes and leaks in ASIX driver, from Dean Jenkins.

   9) Handle SCTP checksums properly in mlx4 driver, from Davide
      Caratti.

  10) We can potentially enter tcp_connect() with a cached route
      already, due to fastopen, so we have to explicitly invalidate it.

  11) skb_warn_bad_offload() can bark in legitimate situations, fix from
      Willem de Bruijn"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (52 commits)
  net: avoid skb_warn_bad_offload false positives on UFO
  qmi_wwan: fix NULL deref on disconnect
  ppp: fix xmit recursion detection on ppp channels
  rds: Reintroduce statistics counting
  tcp: fastopen: tcp_connect() must refresh the route
  net: sched: set xt_tgchk_param par.net properly in ipt_init_target
  net: dsa: mediatek: add adjust link support for user ports
  net/mlx4_en: don't set CHECKSUM_COMPLETE on SCTP packets
  qed: Fix a memory allocation failure test in 'qed_mcp_cmd_init()'
  hysdn: fix to a race condition in put_log_buffer
  s390/qeth: fix L3 next-hop in xmit qeth hdr
  asix: Fix small memory leak in ax88772_unbind()
  asix: Ensure asix_rx_fixup_info members are all reset
  asix: Add rx->ax_skb = NULL after usbnet_skb_return()
  bpf: fix selftest/bpf/test_pkt_md_access on s390x
  netvsc: fix race on sub channel creation
  bpf: fix byte order test in test_verifier
  xgene: Always get clk source, but ignore if it's missing for SGMII ports
  MIPS: Add missing file for eBPF JIT.
  bpf, s390: fix build for libbpf and selftest suite
  ...

iwlwifi: mvm: send delba upon rx ba session timeout

When an RX block-ack session times out, the firmware, which offloads
RX reordering but not the BA session negotiation, stops the session
but doesn't send a DELBA. This causes the the session to remain
active in the remote device, so no more BA sessions will be
established, causing a severe throughput degradation due to the lack
of aggregation.

Use the new ieee80211_rx_ba_timer_expired API when the ba session timer
expires, since this will tear down the ba session and also send a delba.

The previous API used is intended for drivers that offload the
addba/delba negotiation, but not the rx reordering, while our driver
does the opposite.

This patch depends on "mac80211: add api to start ba session timer
expired flow".

Signed-off-by: Naftali Goldstein <naftali.goldstein@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

mac80211: add api to start ba session timer expired flow

Some drivers handle rx buffer reordering internally (and by extension
handle also the rx ba session timer internally), but do not ofload the
addba/delba negotiation.
Add an api for these drivers to properly tear-down the ba session,
including sending a delba.

Signed-off-by: Naftali Goldstein <naftali.goldstein@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

iwlwifi: mvm: don't WARN when a legit race happens in A-MPDU

When we start an Rx A-MPDU session, we first get the AddBA
request, then we send an ADD_STA command to the firmware
that will reply with a BAID which is a hardware resource
that tracks the BA session.
This BAID will appear on each and every frame that we get
from the firwmare until the A-MPDU session is torn down.
In the Rx path, we look at this BAID to manage the
reordering buffer.

This flow is inherently racy since the hardware will start
to put the BAID in the frames it receives even if the
firmware hasn't sent the response to the ADD_STA command.
This basically means that the driver can get frames with
a valid BAID that it doesn't know yet.
When that happens, the driver used to WARN.
Fix this by simply not WARN in this case. When the driver
will know abou the BAID, it will initialise the relevant
states and the next frame with a valid BAID will refresh
them.

Fixes: b915c10174fb ("iwlwifi: mvm: add reorder buffer per queue")
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

iwlwifi: mvm: start mac queues when deferred tx frames are purged

In AP mode, if a station is removed just as it is adding a new stream,
the queue in question will remain stopped and no more TX will happen
in this queue, leading to connection failures and other problems.

This is because under DQA, when tx is deferred because a queue needs
to be allocated, the mac queue for that TID is stopped until the new
stream is added. If at this point the station that this stream
belongs to is removed, all the deferred tx frames are purged, but the
mac queue is not restarted. As a result, all following tx on this
queue will not be transmitted.

Fix this by starting the relevant mac queues when the deferred tx
frames are purged.

Fixes: 24afba7690e4 ("iwlwifi: mvm: support bss dynamic alloc/dealloc of queues")
Signed-off-by: Avraham Stern <avraham.stern@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

net: avoid skb_warn_bad_offload false positives on UFO

skb_warn_bad_offload triggers a warning when an skb enters the GSO
stack at __skb_gso_segment that does not have CHECKSUM_PARTIAL
checksum offload set.

Commit b2504a5dbef3 ("net: reduce skb_warn_bad_offload() noise")
observed that SKB_GSO_DODGY producers can trigger the check and
that passing those packets through the GSO handlers will fix it
up. But, the software UFO handler will set ip_summed to
CHECKSUM_NONE.

When __skb_gso_segment is called from the receive path, this
triggers the warning again.

Make UFO set CHECKSUM_UNNECESSARY instead of CHECKSUM_NONE. On
Tx these two are equivalent. On Rx, this better matches the
skb state (checksum computed), as CHECKSUM_NONE here means no
checksum computed.

See also this thread for context:
http://patchwork.ozlabs.org/patch/799015/

Fixes: b2504a5dbef3 ("net: reduce skb_warn_bad_offload() noise")
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

qmi_wwan: fix NULL deref on disconnect

qmi_wwan_disconnect is called twice when disconnecting devices with
separate control and data interfaces.  The first invocation will set
the interface data to NULL for both interfaces to flag that the
disconnect has been handled.  But the matching NULL check was left
out when qmi_wwan_disconnect was added, resulting in this oops:

  usb 2-1.4: USB disconnect, device number 4
  qmi_wwan 2-1.4:1.6 wwp0s29u1u4i6: unregister 'qmi_wwan' usb-0000:00:1d.0-1.4, WWAN/QMI device
  BUG: unable to handle kernel NULL pointer dereference at 00000000000000e0
  IP: qmi_wwan_disconnect+0x25/0xc0 [qmi_wwan]
  PGD 0
  P4D 0
  Oops: 0000 [#1] SMP
  Modules linked in: <stripped irrelevant module list>
  CPU: 2 PID: 33 Comm: kworker/2:1 Tainted: G            E   4.12.3-nr44-normandy-r1500619820+ #1
  Hardware name: LENOVO 4291LR7/4291LR7, BIOS CBET4000 4.6-810-g50522254fb 07/21/2017
  Workqueue: usb_hub_wq hub_event [usbcore]
  task: ffff8c882b716040 task.stack: ffffb8e800d84000
  RIP: 0010:qmi_wwan_disconnect+0x25/0xc0 [qmi_wwan]
  RSP: 0018:ffffb8e800d87b38 EFLAGS: 00010246
  RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
  RDX: 0000000000000001 RSI: ffff8c8824f3f1d0 RDI: ffff8c8824ef6400
  RBP: ffff8c8824ef6400 R08: 0000000000000000 R09: 0000000000000000
  R10: ffffb8e800d87780 R11: 0000000000000011 R12: ffffffffc07ea0e8
  R13: ffff8c8824e2e000 R14: ffff8c8824e2e098 R15: 0000000000000000
  FS:  0000000000000000(0000) GS:ffff8c8835300000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: 00000000000000e0 CR3: 0000000229ca5000 CR4: 00000000000406e0
  Call Trace:
   ? usb_unbind_interface+0x71/0x270 [usbcore]
   ? device_release_driver_internal+0x154/0x210
   ? qmi_wwan_unbind+0x6d/0xc0 [qmi_wwan]
   ? usbnet_disconnect+0x6c/0xf0 [usbnet]
   ? qmi_wwan_disconnect+0x87/0xc0 [qmi_wwan]
   ? usb_unbind_interface+0x71/0x270 [usbcore]
   ? device_release_driver_internal+0x154/0x210

Reported-and-tested-by: Nathaniel Roach <nroach44@gmail.com>
Fixes: c6adf77953bc ("net: usb: qmi_wwan: add qmap mux protocol support")
Cc: Daniele Palmas <dnlplm@gmail.com>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>

ppp: fix xmit recursion detection on ppp channels

Commit e5dadc65f9e0 ("ppp: Fix false xmit recursion detect with two ppp
devices") dropped the xmit_recursion counter incrementation in
ppp_channel_push() and relied on ppp_xmit_process() for this task.
But __ppp_channel_push() can also send packets directly (using the
.start_xmit() channel callback), in which case the xmit_recursion
counter isn't incremented anymore. If such packets get routed back to
the parent ppp unit, ppp_xmit_process() won't notice the recursion and
will call ppp_channel_push() on the same channel, effectively creating
the deadlock situation that the xmit_recursion mechanism was supposed
to prevent.

This patch re-introduces the xmit_recursion counter incrementation in
ppp_channel_push(). Since the xmit_recursion variable is now part of
the parent ppp unit, incrementation is skipped if the channel doesn't
have any. This is fine because only packets routed through the parent
unit may enter the channel recursively.

Finally, we have to ensure that pch->ppp is not going to be modified
while executing ppp_channel_push(). Instead of taking this lock only
while calling ppp_xmit_process(), we now have to hold it for the full
ppp_channel_push() execution. This respects the ppp locks ordering
which requires locking ->upl before ->downl.

Fixes: e5dadc65f9e0 ("ppp: Fix false xmit recursion detect with two ppp devices")
Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>

rds: Reintroduce statistics counting

In commit 7e3f2952eeb1 ("rds: don't let RDS shutdown a connection
while senders are present"), refilling the receive queue was removed
from rds_ib_recv(), along with the increment of
s_ib_rx_refill_from_thread.

Commit 73ce4317bf98 ("RDS: make sure we post recv buffers")
re-introduces filling the receive queue from rds_ib_recv(), but does
not add the statistics counter. rds_ib_recv() was later renamed to
rds_ib_recv_path().

This commit reintroduces the statistics counting of
s_ib_rx_refill_from_thread and s_ib_rx_refill_from_cq.

Signed-off-by: Håkon Bugge <haakon.bugge@oracle.com>
Reviewed-by: Knut Omang <knut.omang@oracle.com>
Reviewed-by: Wei Lin Guay <wei.lin.guay@oracle.com>
Reviewed-by: Shamir Rabinovitch <shamir.rabinovitch@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tcp: fastopen: tcp_connect() must refresh the route

With new TCP_FASTOPEN_CONNECT socket option, there is a possibility
to call tcp_connect() while socket sk_dst_cache is either NULL
or invalid.

+0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 4
+0 fcntl(4, F_SETFL, O_RDWR|O_NONBLOCK) = 0
+0 setsockopt(4, SOL_TCP, TCP_FASTOPEN_CONNECT, [1], 4) = 0
+0 connect(4, ..., ...) = 0

<< sk->sk_dst_cache becomes obsolete, or even set to NULL >>

+1 sendto(4, ..., 1000, MSG_FASTOPEN, ..., ...) = 1000

We need to refresh the route otherwise bad things can happen,
especially when syzkaller is running on the host :/

Fixes: 19f6d3f3c8422 ("net/tcp-fastopen: Add new API support")
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Wei Wang <weiwan@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Acked-by: Wei Wang <weiwan@google.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: sched: set xt_tgchk_param par.net properly in ipt_init_target

Now xt_tgchk_param par in ipt_init_target is a local varibale,
par.net is not initialized there. Later when xt_check_target
calls target's checkentry in which it may access par.net, it
would cause kernel panic.

Jaroslav found this panic when running:

  # ip link add TestIface type dummy
  # tc qd add dev TestIface ingress handle ffff:
  # tc filter add dev TestIface parent ffff: u32 match u32 0 0 \
    action xt -j CONNMARK --set-mark 4

This patch is to pass net param into ipt_init_target and set
par.net with it properly in there.

v1->v2:
  As Wang Cong pointed, I missed ipt_net_id != xt_net_id, so fix
  it by also passing net_id to __tcf_ipt_init.
v2->v3:
  Missed the fixes tag, so add it.

Fixes: ecb2421b5ddf ("netfilter: add and use nf_ct_netns_get/put")
Reported-by: Jaroslav Aster <jaster@redhat.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: dsa: mediatek: add adjust link support for user ports

Manually adjust the port settings of user ports once PHY polling has
completed. This patch extends the adjust_link callback to configure the
per port PMCR register, applying the proper values polled from the PHY.
Without this patch flow control was not always getting setup properly.

Signed-off-by: Shashidhar Lakkavalli <shashidhar.lakkavalli@openmesh.com>
Signed-off-by: Muciri Gatimu <muciri@openmesh.com>
Signed-off-by: John Crispin <john@phrozen.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/mlx4_en: don't set CHECKSUM_COMPLETE on SCTP packets

if the NIC fails to validate the checksum on TCP/UDP, and validation of IP
checksum is successful, the driver subtracts the pseudo-header checksum
from the value obtained by the hardware and sets CHECKSUM_COMPLETE. Don't
do that if protocol is IPPROTO_SCTP, otherwise CRC32c validation fails.

V2: don't test MLX4_CQE_STATUS_IPV6 if MLX4_CQE_STATUS_IPV4 is set

Reported-by: Shuang Li <shuali@redhat.com>
Fixes: f8c6455bb04b ("net/mlx4_en: Extend checksum offloading by CHECKSUM COMPLETE")
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Acked-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge tag 'for-linus' of git://git./linux/kernel/git/dledford/rdma

Pull rdma fixes from Doug Ledford:
"Third set of -rc fixes for 4.13 cycle

   - small set of miscellanous fixes

   - a reasonably sizable set of IPoIB fixes that deal with multiple
     long standing issues"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma:
  IB/hns: checking for IS_ERR() instead of NULL
  RDMA/mlx5: Fix existence check for extended address vector
  IB/uverbs: Fix device cleanup
  RDMA/uverbs: Prevent leak of reserved field
  IB/core: Fix race condition in resolving IP to MAC
  IB/ipoib: Notify on modify QP failure only when relevant
  Revert "IB/core: Allow QP state transition from reset to error"
  IB/ipoib: Remove double pointer assigning
  IB/ipoib: Clean error paths in add port
  IB/ipoib: Add get statistics support to SRIOV VF
  IB/ipoib: Add multicast packets statistics
  IB/ipoib: Set IPOIB_NEIGH_TBL_FLUSH after flushed completion initialization
  IB/ipoib: Prevent setting negative values to max_nonsrq_conn_qp
  IB/ipoib: Make sure no in-flight joins while leaving that mcast
  IB/ipoib: Use cancel_delayed_work_sync when needed
  IB/ipoib: Fix race between light events and interface restart

parse-maintainers: Move matching sections from MAINTAINERS

Allow any number of command line arguments to match either the
section header or the section contents and create new files.

Create MAINTAINERS.new and SECTION.new.

This allows scripting of the movement of various sections from
MAINTAINERS.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parse-maintainers: Use perl hash references and specific filenames

Instead of reading STDIN and writing STDOUT, use specific filenames of
MAINTAINERS and MAINTAINERS.new.

Use hash references instead of global hash %hash so future modifications
can read and write specific hashes to split up MAINTAINERS into multiple
files using a script.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parse-maintainers: Add section pattern sorting

Section [A-Z]: patterns are not currently in any required sorting order.
Add a specific sorting sequence to MAINTAINERS entries.
Sort F: and X: patterns in alphabetic order.

The preferred section ordering is:

  SECTION HEADER
  M: Maintainers
  R: Reviewers
  P: Named persons without email addresses
  L: Mailing list addresses
  S: Status of this section (Supported, Maintained, Orphan, etc...)
  W: Any relevant URLs
  T: Source code control type (git, quilt, etc)
  Q: Patchwork patch acceptance queue site
  B: Bug tracking URIs
  C: Chat URIs
  F: Files with wildcard patterns (alphabetic ordered)
  X: Excluded files with wildcard patterns (alphabetic ordered)
  N: Files with regex patterns
  K: Keyword regexes in source code for maintainership identification

Miscellaneous perl neatening:

- Rename %map to %hash, map has a different meaning in perl
- Avoid using \& and local variables for function indirection
- Use return for a little c like clarity
- Use c-like function call style instead of &function

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

get_maintainer: Prepare for separate MAINTAINERS files

Allow for MAINTAINERS to become a directory and if it is,
read all the files in the directory for maintained sections.

Optionally look for all files named MAINTAINERS in directories
excluding the .git directory by using --find-maintainer-files.

This optional feature adds ~.3 seconds of CPU on an Intel
i5-6200 with an SSD.

Miscellanea:

- Create a read_maintainer_file subroutine from the existing code
- Test only the existence of MAINTAINERS, not whether it's a file

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

MAINTAINERS: openbmc mailing list is moderated

The openbmc mailing list is moderated for non-subscribers.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Brendan Higgins <brendanhiggins@google.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Joel Stanley <joel@jms.id.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

MAINTAINERS: greybus: Fix typo s/LOOBACK/LOOPBACK

Fixes: f47e07bc5f1a5c48 ("Fix up MAINTAINERS file problems")
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
"Two small fixes, one re-fix of a previous fix and five patches sorting
  out hotplug in the bnx2X class of drivers. The latter is rather
  involved, but necessary because these drivers have started dropping
  lockdep recursion warnings on the hotplug lock because of its
  conversion to a percpu rwsem"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: sg: only check for dxfer_len greater than 256M
  scsi: aacraid: reading out of bounds
  scsi: qedf: Limit number of CQs
  scsi: bnx2i: Simplify cpu hotplug code
  scsi: bnx2fc: Simplify CPU hotplug code
  scsi: bnx2i: Prevent recursive cpuhotplug locking
  scsi: bnx2fc: Prevent recursive cpuhotplug locking
  scsi: bnx2fc: Plug CPU hotplug race

random: fix warning message on ia64 and parisc

Fix the warning message on the parisc and IA64 architectures to show the
correct function name of the caller by using %pS instead of %pF. The
message is printed with the value of _RET_IP_ which calls
__builtin_return_address(0) and as such returns the IP address caller
instead of pointer to a function descriptor of the caller.

The effect of this patch is visible on the parisc and ia64 architectures
only since those are the ones which use function descriptors while on
all others %pS and %pF will behave the same.

Cc: Theodore Ts'o <tytso@mit.edu>
Cc: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Helge Deller <deller@gmx.de>
Fixes: eecabf567422 ("random: suppress spammy warnings about unseeded randomness")
Fixes: d06bfd1989fe ("random: warn when kernel uses unseeded randomness")
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Merge tag 'xtensa-20170807' of git://github.com/jcmvbkbc/linux-xtensa

Pull Xtensa fixes from Max Filippov:

- use asm-generic instances of asm/param.h and asm/device.h instead of
   exact copies in arch/xtensa/include/asm;

- fix build error for xtensa cores with aliasing WT cache: define cache
   flushing functions and copy_{to,from}_user_page;

- add missing EXPORT_SYMBOLs for clear_user_highpage, copy_user_highpage,
   flush_dcache_page, local_flush_cache_range, local_flush_cache_page,
   csum_partial and csum_partial_copy_generic.

* tag 'xtensa-20170807' of git://github.com/jcmvbkbc/linux-xtensa:
  xtensa: mm/cache: add missing EXPORT_SYMBOLs
  xtensa: don't limit csum_partial export by CONFIG_NET
  xtensa: fix cache aliasing handling code for WT cache
  xtensa: remove wrapper header for asm/param.h
  xtensa: remove wrapper header for asm/device.h

Merge tag 'for-linus-20170807' of git://git.infradead.org/linux-mtd

Pull MTD fixes from Brian Norris:
"I missed getting these out for rc4, but here are some MTD fixes.

  Just NAND fixes (in both the core handling, and a few drivers). Notes
  stolen from Boris:

  Core fixes:

   - fix data interface setup for ONFI NANDs that do not support the SET
     FEATURES command

   - fix a kernel doc header

   - fix potential integer overflow when retrieving timing information
     from the parameter page

   - fix wrong OOB layout for small page NANDs

  Driver fixes:

   - fix potential division-by-zero bug

   - fix backward compat with old atmel-nand DT bindings

   - fix ->setup_data_interface() in the atmel NAND driver"

* tag 'for-linus-20170807' of git://git.infradead.org/linux-mtd:
  mtd: nand: atmel: Fix EDO mode check
  mtd: nand: Declare tBERS, tR and tPROG as u64 to avoid integer overflow
  mtd: nand: Fix timing setup for NANDs that do not support SET FEATURES
  mtd: nand: Fix a docs build warning
  mtd: nand: sunxi: fix potential divide-by-zero error
  nand: fix wrong default oob layout for small pages using soft ecc
  mtd: nand: atmel: Fix DT backward compatibility in pmecc.c

Merge tag 'xfs-4.13-fixes-3' of git://git./fs/xfs/xfs-linux

Pull xfs fixes from Darrick Wong:
"I have a couple more bug fixes for you today:

   - fix memory leak when issuing discard

   - fix propagation of the dax inode flag"

* tag 'xfs-4.13-fixes-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: Fix per-inode DAX flag inheritance
  xfs: Fix leak of discard bio

qed: Fix a memory allocation failure test in 'qed_mcp_cmd_init()'

We allocate 'p_info->mfw_mb_cur' and 'p_info->mfw_mb_shadow' but we check
'p_info->mfw_mb_addr' instead of 'p_info->mfw_mb_cur'.

'p_info->mfw_mb_addr' is never 0, because it is initiliazed a few lines
above in 'qed_load_mcp_offsets()'.

Update the test and check the result of the 2 'kzalloc()' instead.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Tomer Tayar <Tomer.Tayar@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

hysdn: fix to a race condition in put_log_buffer

The synchronization type that was used earlier to guard the loop that
deletes unused log buffers may lead to a situation that prevents any
thread from going through the loop.

The patch deletes previously used synchronization mechanism and moves
the loop under the spin_lock so the similar cases won't be feasible in
the future.

Found by by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Anton Volkov <avolkov@ispras.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>

s390/qeth: fix L3 next-hop in xmit qeth hdr

On L3, the qeth_hdr struct needs to be filled with the next-hop
IP address.
The current code accesses rtable->rt_gateway without checking that
rtable is a valid address. The accidental access to a lowcore area
results in a random next-hop address in the qeth_hdr.
rtable (or more precisely, skb_dst(skb)) can be NULL in rare cases
(for instance together with AF_PACKET sockets).
This patch adds the missing NULL-ptr checks.

Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Fixes: 87e7597b5a3 qeth: Move away from using neighbour entries in qeth_l3_fill_header()
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge tag 'rdma-rc-2017-07-26' of git://git./linux/kernel/git/leon/linux-rdma into leon-ipoib

IPoIB fixes for 4.13

The patchset provides various fixes for IPoIB. It is combination of
fixes to various issues discovered during verification along with
static checkers cleanup patches.

Most of the patches are from pre-git era and hence lack of Fixes lines.

There is one exception in this IPoIB group - addition of patch revert:
Revert "IB/core: Allow QP state transition from reset to error", but
it followed by proper fix to the annoying print, so I thought it is
appropriate to include it.

Signed-off-by: Doug Ledford <dledford@redhat.com>

Merge branch 'asix-Improve-robustness'

Dean Jenkins says:

====================
asix: Improve robustness

Please consider taking these patches to improve the robustness of the ASIX USB
to Ethernet driver.

Failures prompting an ASIX driver code review
=============================================

On an ARM i.MX6 embedded platform some strange one-off and two-off failures were
observed in and around the ASIX USB to Ethernet driver. This was observed on a
highly modified kernel 3.14 with the ASIX driver containing back-ported changes
from kernel.org up to kernel 4.8 approximately.

a) A one-off failure in asix_rx_fixup_internal():

There was an occurrence of an attempt to write off the end of the netdev buffer
which was trapped by skb_over_panic() in skb_put().

[20030.846440] skbuff: skb_over_panic: text:7f2271c0 len:120 put:60 head:8366ecc0 data:8366ed02 tail:0x8366ed7a end:0x8366ed40 dev:eth0
[20030.863007] Kernel BUG at 8044ce38 [verbose debug info unavailable]

[20031.215345] Backtrace:
[20031.217884] [<8044cde0>] (skb_panic) from [<8044d50c>] (skb_put+0x50/0x5c)
[20031.227408] [<8044d4bc>] (skb_put) from [<7f2271c0>] (asix_rx_fixup_internal+0x1c4/0x23c [asix])
[20031.242024] [<7f226ffc>] (asix_rx_fixup_internal [asix]) from [<7f22724c>] (asix_rx_fixup_common+0x14/0x18 [asix])
[20031.260309] [<7f227238>] (asix_rx_fixup_common [asix]) from [<7f21f7d4>] (usbnet_bh+0x74/0x224 [usbnet])
[20031.269879] [<7f21f760>] (usbnet_bh [usbnet]) from [<8002f834>] (call_timer_fn+0xa4/0x1f0)
[20031.283961] [<8002f790>] (call_timer_fn) from [<80030834>] (run_timer_softirq+0x230/0x2a8)
[20031.302782] [<80030604>] (run_timer_softirq) from [<80028780>] (__do_softirq+0x15c/0x37c)
[20031.321511] [<80028624>] (__do_softirq) from [<80028c38>] (irq_exit+0x8c/0xe8)
[20031.339298] [<80028bac>] (irq_exit) from [<8000e9c8>] (handle_IRQ+0x8c/0xc8)
[20031.350038] [<8000e93c>] (handle_IRQ) from [<800085c8>] (gic_handle_irq+0xb8/0xf8)
[20031.365528] [<80008510>] (gic_handle_irq) from [<8050de80>] (__irq_svc+0x40/0x70)

Analysis of the logic of the ASIX driver (containing backported changes from
kernel.org up to kernel 4.8 approximately) suggested that the software could not
trigger skb_over_panic(). The analysis of the kernel BUG() crash information
suggested that the netdev buffer was written with 2 minimal 60 octet length
Ethernet frames (ASIX hardware drops the 4 octet FCS field) and the 2nd Ethernet
frame attempted to write off the end of the netdev buffer.

Note that the netdev buffer should only contain 1 Ethernet frame so if an
attempt to write 2 Ethernet frames into the buffer is made then that is wrong.
However, the logic of the asix_rx_fixup_internal() only allows 1 Ethernet frame
to be written into the netdev buffer.

Potentially this failure was due to memory corruption because it was only seen
once.

b) Two-off failures in the NAPI layer's backlog queue:

There were 2 crashes in the NAPI layer's backlog queue presumably after
asix_rx_fixup_internal() called usbnet_skb_return().

[24097.273945] Unable to handle kernel NULL pointer dereference at virtual address 00000004

[24097.398944] PC is at process_backlog+0x80/0x16c

[24097.569466] Backtrace:
[24097.572007] [<8045ad98>] (process_backlog) from [<8045b64c>] (net_rx_action+0xcc/0x248)
[24097.591631] [<8045b580>] (net_rx_action) from [<80028780>] (__do_softirq+0x15c/0x37c)
[24097.610022] [<80028624>] (__do_softirq) from [<800289cc>] (run_ksoftirqd+0x2c/0x84)

and

[ 1059.828452] Unable to handle kernel NULL pointer dereference at virtual address 00000000

[ 1059.953715] PC is at process_backlog+0x84/0x16c

[ 1060.140896] Backtrace:
[ 1060.143434] [<8045ad98>] (process_backlog) from [<8045b64c>] (net_rx_action+0xcc/0x248)
[ 1060.163075] [<8045b580>] (net_rx_action) from [<80028780>] (__do_softirq+0x15c/0x37c)
[ 1060.181474] [<80028624>] (__do_softirq) from [<80028c38>] (irq_exit+0x8c/0xe8)
[ 1060.199256] [<80028bac>] (irq_exit) from [<8000e9c8>] (handle_IRQ+0x8c/0xc8)
[ 1060.210006] [<8000e93c>] (handle_IRQ) from [<800085c8>] (gic_handle_irq+0xb8/0xf8)
[ 1060.225492] [<80008510>] (gic_handle_irq) from [<8050de80>] (__irq_svc+0x40/0x70)

The embedded board was only using an ASIX USB to Ethernet adaptor eth0.

Analysis suggested that the doubly-linked list pointers of the backlog queue had
been corrupted because one of the link pointers was NULL.

Potentially this failure was due to memory corruption because it was only seen
twice.

Results of the ASIX driver code review
======================================

During the code review some weaknesses were observed in the ASIX driver and the
following patches have been created to improve the robustness.

Brief overview of the patches
-----------------------------

1. asix: Add rx->ax_skb = NULL after usbnet_skb_return()

The current ASIX driver sends the received Ethernet frame to the NAPI layer of
the network stack via the call to usbnet_skb_return() in
asix_rx_fixup_internal() but retains the rx->ax_skb pointer to the netdev
buffer. The driver no longer needs the rx->ax_skb pointer at this point because
the NAPI layer now has the Ethernet frame.

This means that asix_rx_fixup_internal() must not use rx->ax_skb after the call
to usbnet_skb_return() because it could corrupt the handling of the Ethernet
frame within the network layer.

Therefore, to remove the risk of erroneous usage of rx->ax_skb, set rx->ax_skb
to NULL after the call to usbnet_skb_return(). This avoids potential erroneous
freeing of rx->ax_skb and erroneous writing to the netdev buffer. If the
software now somehow inappropriately reused rx->ax_skb, then a NULL pointer
dereference of rx->ax_skb would occur which makes investigation easier.

2. asix: Ensure asix_rx_fixup_info members are all reset

This patch creates reset_asix_rx_fixup_info() to allow all the
asix_rx_fixup_info structure members to be consistently reset to initial
conditions.

Call reset_asix_rx_fixup_info() upon each detectable error condition so that the
next URB is processed from a known state.

Otherwise, there is a risk that some members of the asix_rx_fixup_info structure
may be incorrect after an error occurred so potentially leading to a
malfunction.

3. asix: Fix small memory leak in ax88772_unbind()

This patch creates asix_rx_fixup_common_free() to allow the rx->ax_skb to be
freed when necessary.

asix_rx_fixup_common_free() is called from ax88772_unbind() before the parent
private data structure is freed.

Without this patch, there is a risk of a small netdev buffer memory leak each
time ax88772_unbind() is called during the reception of an Ethernet frame that
spans across 2 URBs.

Testing
=======

The patches have been sanity tested on a 64-bit Linux laptop running kernel
4.13-rc2 with the 3 patches applied on top.

The ASIX USB to Adaptor used for testing was (output of lsusb):
ID 0b95:772b ASIX Electronics Corp. AX88772B

Test #1
-------

The test ran a flood ping test script which slowly incremented the ICMP Echo
Request's payload from 0 to 5000 octets. This eventually causes IPv4
fragmentation to occur which causes Ethernet frames to be sent very close to
each other so increases the probability that an Ethernet frame will span 2 URBs.
The test showed that all pings were successful. The test took about 15 minutes
to complete.

Test #2
-------

A script was run on the laptop to periodically run ifdown and ifup every second
so that the ASIX USB to Adaptor was up for 1 second and down for 1 second.

From a Linux PC connected to the laptop, the following ping command was used
ping -f -s 5000 <ip address of laptop>

The large ICMP payload causes IPv4 fragmentation resulting in multiple
Ethernet frames per original IP packet.

Kernel debug within the ASIX driver was enabled to see whether any ASIX errors
were generated. The test was run for about 24 hours and no ASIX errors were
seen.

Patches
=======

The 3 patches have been rebased off the net-next repo master branch with HEAD
fbbeefd net: fec: Allow reception of frames bigger than 1522 bytes
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

asix: Fix small memory leak in ax88772_unbind()

When Ethernet frames span mulitple URBs, the netdev buffer memory
pointed to by the asix_rx_fixup_info structure remains allocated
during the time gap between the 2 executions of asix_rx_fixup_internal().

This means that if ax88772_unbind() is called within this time
gap to free the memory of the parent private data structure then
a memory leak of the part filled netdev buffer memory will occur.

Therefore, create a new function asix_rx_fixup_common_free() to
free the memory of the netdev buffer and add a call to
asix_rx_fixup_common_free() from inside ax88772_unbind().

Consequently when an unbind occurs part way through receiving
an Ethernet frame, the netdev buffer memory that is holding part
of the received Ethernet frame will now be freed.

Signed-off-by: Dean Jenkins <Dean_Jenkins@mentor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

asix: Ensure asix_rx_fixup_info members are all reset

There is a risk that the members of the structure asix_rx_fixup_info
become unsynchronised leading to the possibility of a malfunction.

For example, rx->split_head was not being set to false after an
error was detected so potentially could cause a malformed 32-bit
Data header word to be formed.

Therefore add function reset_asix_rx_fixup_info() to reset all the
members of asix_rx_fixup_info so that future processing will start
with known initial conditions.

Also, if (skb->len != offset) becomes true then call
reset_asix_rx_fixup_info() so that the processing of the next URB
starts with known initial conditions. Without the call, the check
does nothing which potentially could lead to a malfunction
when the next URB is processed.

In addition, for robustness, call reset_asix_rx_fixup_info() before
every error path's "return 0". This ensures that the next URB is
processed from known initial conditions.

Signed-off-by: Dean Jenkins <Dean_Jenkins@mentor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

asix: Add rx->ax_skb = NULL after usbnet_skb_return()

In asix_rx_fixup_internal() there is a risk that rx->ax_skb gets
reused after passing the Ethernet frame into the network stack via
usbnet_skb_return().

The risks include:

a) asynchronously freeing rx->ax_skb after passing the netdev buffer
to the NAPI layer which might corrupt the backlog queue.

b) erroneously reusing rx->ax_skb such as calling skb_put_data() multiple
times which causes writing off the end of the netdev buffer.

Therefore add a defensive rx->ax_skb = NULL after usbnet_skb_return()
so that it is not possible to free rx->ax_skb or to apply
skb_put_data() too many times.

Signed-off-by: Dean Jenkins <Dean_Jenkins@mentor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

bpf: fix selftest/bpf/test_pkt_md_access on s390x

Commit 18f3d6be6be1 ("selftests/bpf: Add test cases to test narrower ctx field loads")
introduced new eBPF test cases. One of them (test_pkt_md_access.c)
fails on s390x. The BPF verifier error message is:

[root@s8360046 bpf]# ./test_progs
test_pkt_access:PASS:ipv4 349 nsec
test_pkt_access:PASS:ipv6 212 nsec
[....]
libbpf: load bpf program failed: Permission denied
libbpf: -- BEGIN DUMP LOG ---
libbpf:
0: (71) r2 = *(u8 *)(r1 +0)
invalid bpf_context access off=0 size=1

libbpf: -- END LOG --
libbpf: failed to load program 'test1'
libbpf: failed to load object './test_pkt_md_access.o'
Summary: 29 PASSED, 1 FAILED
[root@s8360046 bpf]#

This is caused by a byte endianness issue. S390x is a big endian
architecture. Pointer access to the lowest byte or halfword of a
four byte value need to add an offset.
On little endian architectures this offset is not needed.

Fix this and use the same approach as the originator used for other files
(for example test_verifier.c) in his original commit.

With this fix the test program test_progs succeeds on s390x:
[root@s8360046 bpf]# ./test_progs
test_pkt_access:PASS:ipv4 236 nsec
test_pkt_access:PASS:ipv6 217 nsec
test_xdp:PASS:ipv4 3624 nsec
test_xdp:PASS:ipv6 1722 nsec
test_l4lb:PASS:ipv4 926 nsec
test_l4lb:PASS:ipv6 1322 nsec
test_tcp_estats:PASS: 0 nsec
test_bpf_obj_id:PASS:get-fd-by-notexist-prog-id 0 nsec
test_bpf_obj_id:PASS:get-fd-by-notexist-map-id 0 nsec
test_bpf_obj_id:PASS:get-prog-info(fd) 0 nsec
test_bpf_obj_id:PASS:get-map-info(fd) 0 nsec
test_bpf_obj_id:PASS:get-prog-info(fd) 0 nsec
test_bpf_obj_id:PASS:get-map-info(fd) 0 nsec
test_bpf_obj_id:PASS:get-prog-fd(next_id) 0 nsec
test_bpf_obj_id:PASS:get-prog-info(next_id->fd) 0 nsec
test_bpf_obj_id:PASS:get-prog-fd(next_id) 0 nsec
test_bpf_obj_id:PASS:get-prog-info(next_id->fd) 0 nsec
test_bpf_obj_id:PASS:check total prog id found by get_next_id 0 nsec
test_bpf_obj_id:PASS:get-map-fd(next_id) 0 nsec
test_bpf_obj_id:PASS:get-map-fd(next_id) 0 nsec
test_bpf_obj_id:PASS:get-map-fd(next_id) 0 nsec
test_bpf_obj_id:PASS:get-map-fd(next_id) 0 nsec
test_bpf_obj_id:PASS:get-map-fd(next_id) 0 nsec
test_bpf_obj_id:PASS:get-map-fd(next_id) 0 nsec
test_bpf_obj_id:PASS:get-map-fd(next_id) 0 nsec
test_bpf_obj_id:PASS:check get-map-info(next_id->fd) 0 nsec
test_bpf_obj_id:PASS:get-map-fd(next_id) 0 nsec
test_bpf_obj_id:PASS:check get-map-info(next_id->fd) 0 nsec
test_bpf_obj_id:PASS:check total map id found by get_next_id 0 nsec
test_pkt_md_access:PASS: 277 nsec
Summary: 30 PASSED, 0 FAILED
[root@s8360046 bpf]#

Fixes: 18f3d6be6be1 ("selftests/bpf: Add test cases to test narrower ctx field loads")
Signed-off-by: Thomas Richter <tmricht@linux.vnet.ibm.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

pinctrl: generic: update references to Documentation/pinctrl.txt

Update deprecated references to Documentation/pinctrl.txt since it has been
moved to Documentation/driver-api/pinctl.rst.

Signed-off-by: Ludovic Desroches <ludovic.desroches@o2linux.fr>
Fixes: 5a9b73832e9e ("pinctrl.txt: move it to the driver-api book")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: intel: merrifield: Correct UART pin lists

UART pin lists consist GPIO numbers which is simply wrong.
Replace it by pin numbers.

Fixes: 4e80c8f50574 ("pinctrl: intel: Add Intel Merrifield pin controller support")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: armada-37xx: Fix number of pin in south bridge

On the south bridge we have pin from to 29, so it gives 30 pins (and not
29).

Without this patch the kernel complain with the following traces:
cat /sys/kernel/debug/pinctrl/d0018800.pinctrl/pingroups
[  154.530205] armada-37xx-pinctrl d0018800.pinctrl: failed to get pin(29) name
[  154.537567] ------------[ cut here ]------------
[  154.542348] WARNING: CPU: 1 PID: 1347 at /home/gclement/open/kernel/marvell-mainline-linux/drivers/pinctrl/core.c:1610 pinctrl_groups_show+0x15c/0x1a0
[  154.555918] Modules linked in:
[  154.558890] CPU: 1 PID: 1347 Comm: cat Tainted: G        W       4.13.0-rc1-00001-g19e1b9fa219d #525
[  154.568316] Hardware name: Marvell Armada 3720 Development Board DB-88F3720-DDR3 (DT)
[  154.576311] task: ffff80001d32d100 task.stack: ffff80001bdc0000
[  154.583048] PC is at pinctrl_groups_show+0x15c/0x1a0
[  154.587816] LR is at pinctrl_groups_show+0x148/0x1a0
[  154.592847] pc : [<ffff0000083e3adc>] lr : [<ffff0000083e3ac8>] pstate: 00000145
[  154.600840] sp : ffff80001bdc3c80
[  154.604255] x29: ffff80001bdc3c80 x28: 00000000f7750000
[  154.609825] x27: ffff80001d05d198 x26: 0000000000000009
[  154.615224] x25: ffff0000089ead20 x24: 0000000000000002
[  154.620705] x23: ffff000008c8e1d0 x22: ffff80001be55700
[  154.626187] x21: ffff80001d05d100 x20: 0000000000000005
[  154.631667] x19: 0000000000000006 x18: 0000000000000010
[  154.637238] x17: 0000000000000000 x16: ffff0000081fc4b8
[  154.642726] x15: 0000000000000006 x14: ffff0000899e537f
[  154.648214] x13: ffff0000099e538d x12: 206f742064656c69
[  154.653613] x11: 6166203a6c727463 x10: 0000000005f5e0ff
[  154.659094] x9 : ffff80001bdc38c0 x8 : 286e697020746567
[  154.664576] x7 : ffff000008551870 x6 : 000000000000011b
[  154.670146] x5 : 0000000000000000 x4 : 0000000000000000
[  154.675544] x3 : 0000000000000000 x2 : 0000000000000000
[  154.681025] x1 : ffff000008c8e1d0 x0 : ffff80001be55700
[  154.686507] Call trace:
[  154.688668] Exception stack(0xffff80001bdc3ab0 to 0xffff80001bdc3be0)
[  154.695224] 3aa0:                                   0000000000000006 0001000000000000
[  154.703310] 3ac0: ffff80001bdc3c80 ffff0000083e3adc ffff80001bdc3bb0 00000000ffffffd8
[  154.711304] 3ae0: 4554535953425553 6f6674616c703d4d 4349564544006d72 6674616c702b3d45
[  154.719478] 3b00: 313030643a6d726f 6e69702e30303838 ffff80006c727463 ffff0000089635d8
[  154.727562] 3b20: ffff80001d1ca0cb ffff000008af0fa4 ffff80001bdc3b40 ffff000008c8e1dc
[  154.735648] 3b40: ffff80001bdc3bc0 ffff000008223174 ffff80001be55700 ffff000008c8e1d0
[  154.743731] 3b60: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[  154.752354] 3b80: 000000000000011b ffff000008551870 286e697020746567 ffff80001bdc38c0
[  154.760446] 3ba0: 0000000005f5e0ff 6166203a6c727463 206f742064656c69 ffff0000099e538d
[  154.767910] 3bc0: ffff0000899e537f 0000000000000006 ffff0000081fc4b8 0000000000000000
[  154.776085] [<ffff0000083e3adc>] pinctrl_groups_show+0x15c/0x1a0
[  154.782823] [<ffff000008222abc>] seq_read+0x184/0x460
[  154.787505] [<ffff000008344120>] full_proxy_read+0x60/0xa8
[  154.793431] [<ffff0000081f9bec>] __vfs_read+0x1c/0x110
[  154.799001] [<ffff0000081faff4>] vfs_read+0x84/0x140
[  154.803860] [<ffff0000081fc4fc>] SyS_read+0x44/0xa0
[  154.808983] [<ffff000008082f30>] el0_svc_naked+0x24/0x28
[  154.814459] ---[ end trace 4cbb00a92d616b95 ]---

Cc: stable@vger.kernel.org
Fixes: 87466ccd9401 ("pinctrl: armada-37xx: Add pin controller support
for Armada 37xx")
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: armada-37xx: Fix the pin 23 on south bridge

Pin 23 on South bridge does not belong to the rgmii group. It belongs to
a separate group which can have 3 functions.

Due to this the fix also have to update the way the functions are
managed. Until now each groups used NB_FUNCS(which was 2) functions. For
the mpp23, 3 functions are available but it is the only group which needs
it, so on the loop involving NB_FUNCS an extra test was added to handle
only the functions added.

The bug was visible with the merge of the commit 07d065abf93d "arm64:
dts: marvell: armada-3720-db: Add vqmmc regulator for SD slot", the gpio
regulator used the gpio 23, due to this the whole rgmii group was setup
to gpio which broke the Ethernet support on the Armada 3720 DB
board. Thanks to this patch, the UHS SD cards (which need the vqmmc)
_and_ the Ethernet work again.

Cc: stable@vger.kernel.org
Fixes: 87466ccd9401 ("pinctrl: armada-37xx: Add pin controller support
for Armada 37xx")
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

netvsc: fix race on sub channel creation

The existing sub channel code did not wait for all the sub-channels
to completely initialize. This could lead to race causing crash
in napi_netif_del() from bad list. The existing code would send
an init message, then wait only for the initial response that
the init message was received. It thought it was waiting for
sub channels but really the init response did the wakeup.

The new code keeps track of the number of open channels and
waits until that many are open.

Other issues here were:
* host might return less sub-channels than was requested.
* the new init status is not valid until after init was completed.

Fixes: b3e6b82a0099 ("hv_netvsc: Wait for sub-channels to be processed during probe")
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Linux 4.13-rc4

Merge tag 'platform-drivers-x86-v4.13-4' of git://git.infradead.org/linux-platform-drivers-x86

Pull x86 platform driver fix from Darren Hart:
"Fix loop preventing some platforms from waking up via the power button
  in s2idle:

   - intel-vbtn: match power button on press rather than release"

* tag 'platform-drivers-x86-v4.13-4' of git://git.infradead.org/linux-platform-drivers-x86:
  platform/x86: intel-vbtn: match power button on press rather than release

Merge tag 'ext4_for_linus_stable' of git://git./linux/kernel/git/tytso/ext4

Pull ext4 fixes from Ted Ts'o:
"A large number of ext4 bug fixes and cleanups for v4.13"

* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: fix copy paste error in ext4_swap_extents()
  ext4: fix overflow caused by missing cast in ext4_resize_fs()
  ext4, project: expand inode extra size if possible
  ext4: cleanup ext4_expand_extra_isize_ea()
  ext4: restructure ext4_expand_extra_isize
  ext4: fix forgetten xattr lock protection in ext4_expand_extra_isize
  ext4: make xattr inode reads faster
  ext4: inplace xattr block update fails to deduplicate blocks
  ext4: remove unused mode parameter
  ext4: fix warning about stack corruption
  ext4: fix dir_nlink behaviour
  ext4: silence array overflow warning
  ext4: fix SEEK_HOLE/SEEK_DATA for blocksize < pagesize
  ext4: release discard bio after sending discard commands
  ext4: convert swap_inode_data() over to use swap() on most of the fields
  ext4: error should be cleared if ea_inode isn't added to the cache
  ext4: Don't clear SGID when inheriting ACLs
  ext4: preserve i_mode if __ext4_set_acl() fails
  ext4: remove unused metadata accounting variables
  ext4: correct comment references to ext4_ext_direct_IO()

Merge branch 'upstream' of git://git.linux-mips.org/ralf/upstream-linus

Pull MIPS fixes from Ralf Baechle:
"This fixes two build issues for ralink platforms, both due to missing
  #includes which used to be included indirectly via other headers"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
  MIPS: ralink: mt7620: Add missing header
  MIPS: ralink: Fix build error due to missing header

Fix compat_sys_sigpending breakage

The latest change of compat_sys_sigpending in commit 8f13621abced
("sigpending(): move compat to native") has broken it in two ways.

First, it tries to write 4 bytes more than userspace expects:
sizeof(old_sigset_t) == sizeof(long) == 8 instead of
sizeof(compat_old_sigset_t) == sizeof(u32) == 4.

Second, on big endian architectures these bytes are being written in the
wrong order.

This bug was found by strace test suite.

Reported-by: Anatoly Pugachev <matorola@gmail.com>
Inspired-by: Eugene Syromyatnikov <evgsyr@gmail.com>
Fixes: 8f13621abced ("sigpending(): move compat to native")
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

ext4: fix copy paste error in ext4_swap_extents()

This bug was found by a static code checker tool for copy paste
problems.

Signed-off-by: Maninder Singh <maninder1.s@samsung.com>
Signed-off-by: Vaneet Narang <v.narang@samsung.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

ext4: fix overflow caused by missing cast in ext4_resize_fs()

On a 32-bit platform, the value of n_blcoks_count may be wrong during
the file system is resized to size larger than 2^32 blocks. This may
caused the superblock being corrupted with zero blocks count.

Fixes: 1c6bd7173d66
Signed-off-by: Jerry Lee <jerrylee@qnap.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@vger.kernel.org # 3.7+

ext4, project: expand inode extra size if possible

When upgrading from old format, try to set project id
to old file first time, it will return EOVERFLOW, but if
that file is dirtied(touch etc), changing project id will
be allowed, this might be confusing for users, we could
try to expand @i_extra_isize here too.

Reported-by: Zhang Yi <yi.zhang@huawei.com>
Signed-off-by: Miao Xie <miaoxie@huawei.com>
Signed-off-by: Wang Shilong <wshilong@ddn.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

ext4: cleanup ext4_expand_extra_isize_ea()

Clean up some goto statement, make ext4_expand_extra_isize_ea() clearer.

Signed-off-by: Miao Xie <miaoxie@huawei.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Wang Shilong <wshilong@ddn.com>