GitHub/MotorolaMobilityLLC/kernel-slsi.git
7 years agoi40e: Fix a sleep-in-atomic bug
Jia-Ju Bai [Wed, 14 Jun 2017 23:35:31 +0000 (16:35 -0700)]
i40e: Fix a sleep-in-atomic bug

The driver may sleep under a spin lock, and the function call path is:
i40e_ndo_set_vf_port_vlan (acquire the lock by spin_lock_bh)
  i40e_vsi_remove_pvid
    i40e_vlan_stripping_disable
      i40e_aq_update_vsi_params
        i40e_asq_send_command
          mutex_lock --> may sleep

To fixed it, the spin lock is released before "i40e_vsi_remove_pvid", and
the lock is acquired again after this function.

Signed-off-by: Jia-Ju Bai <baijiaju1990@163.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: don't global ICMP rate limit packets originating from loopback
Jesper Dangaard Brouer [Wed, 14 Jun 2017 11:27:37 +0000 (13:27 +0200)]
net: don't global ICMP rate limit packets originating from loopback

Florian Weimer seems to have a glibc test-case which requires that
loopback interfaces does not get ICMP ratelimited.  This was broken by
commit c0303efeab73 ("net: reduce cycles spend on ICMP replies that
gets rate limited").

An ICMP response will usually be routed back-out the same incoming
interface.  Thus, take advantage of this and skip global ICMP
ratelimit when the incoming device is loopback.  In the unlikely event
that the outgoing it not loopback, due to strange routing policy
rules, ICMP rate limiting still works via peer ratelimiting via
icmpv4_xrlim_allow().  Thus, we should still comply with RFC1812
(section 4.3.2.8 "Rate Limiting").

This seems to fix the reproducer given by Florian.  While still
avoiding to perform expensive and unneeded outgoing route lookup for
rate limited packets (in the non-loopback case).

Fixes: c0303efeab73 ("net: reduce cycles spend on ICMP replies that gets rate limited")
Reported-by: Florian Weimer <fweimer@redhat.com>
Reported-by: "H.J. Lu" <hjl.tools@gmail.com>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet/act_pedit: fix an error code
Dan Carpenter [Wed, 14 Jun 2017 10:29:31 +0000 (13:29 +0300)]
net/act_pedit: fix an error code

I'm reviewing static checker warnings where we do ERR_PTR(0), which is
the same as NULL.  I'm pretty sure we intended to return ERR_PTR(-EINVAL)
here.  Sometimes these bugs lead to a NULL dereference but I don't
immediately see that problem here.

Fixes: 71d0ed7079df ("net/act_pedit: Support using offset relative to the conventional network headers")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Amir Vadai <amir@vadai.me>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: update undefined ->ndo_change_mtu() comment
Magnus Damm [Wed, 14 Jun 2017 07:15:24 +0000 (16:15 +0900)]
net: update undefined ->ndo_change_mtu() comment

Update ->ndo_change_mtu() callback comment to remove text
about returning error in case of undefined callback. This
change makes the comment match the existing code behavior.

Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet_sched: move tcf_lock down after gen_replace_estimator()
WANG Cong [Tue, 13 Jun 2017 20:36:24 +0000 (13:36 -0700)]
net_sched: move tcf_lock down after gen_replace_estimator()

Laura reported a sleep-in-atomic kernel warning inside
tcf_act_police_init() which calls gen_replace_estimator() with
spinlock protection.

It is not necessary in this case, we already have RTNL lock here
so it is enough to protect concurrent writers. For the reader,
i.e. tcf_act_police(), it needs to make decision based on this
rate estimator, in the worst case we drop more/less packets than
necessary while changing the rate in parallel, it is still acceptable.

Reported-by: Laura Abbott <labbott@redhat.com>
Reported-by: Nick Huber <nicholashuber@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agocaif: Add sockaddr length check before accessing sa_family in connect handler
Mateusz Jurczyk [Tue, 13 Jun 2017 18:06:12 +0000 (20:06 +0200)]
caif: Add sockaddr length check before accessing sa_family in connect handler

Verify that the caller-provided sockaddr structure is large enough to
contain the sa_family field, before accessing it in the connect()
handler of the AF_CAIF socket. Since the syscall doesn't enforce a minimum
size of the corresponding memory region, very short sockaddrs (zero or one
byte long) result in operating on uninitialized memory while referencing
sa_family.

Signed-off-by: Mateusz Jurczyk <mjurczyk@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge tag 'batadv-net-for-davem-20170613' of git://git.open-mesh.org/linux-merge
David S. Miller [Tue, 13 Jun 2017 17:46:01 +0000 (13:46 -0400)]
Merge tag 'batadv-net-for-davem-20170613' of git://git.open-mesh.org/linux-merge

Simon Wunderlich says:

====================
Here are two batman-adv bugfixes:

 - fix rx packet counters for local ARP replies, by Sven Eckelmann

 - fix memory leaks for unicast packetes received from another gateway
   in bridge loop avoidance, by Andreas Pape
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge tag 'mac80211-for-davem-2017-06-13' of git://git.kernel.org/pub/scm/linux/kerne...
David S. Miller [Tue, 13 Jun 2017 17:34:13 +0000 (13:34 -0400)]
Merge tag 'mac80211-for-davem-2017-06-13' of git://git./linux/kernel/git/jberg/mac80211

Johannes Berg says:

====================
Some fixes:
 * Avi fixes some fallout from my mac80211 RX flags changes
 * Emmanuel fixes an issue with adhering to the spec, and
   an oversight in the SMPS management code
 * Jason's patch makes mac80211 use constant-time memory
   comparisons for message authentication, to avoid having
   potentially observable timing differences
 * my fix makes mac80211 set the basic rates bitmap before
   the channel so the next update to the driver has more
   consistent data - this required another rework patch to
   remove some useless 5/10 MHz code that can never be hit
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoqed: fix dump of context data
Tayar, Tomer [Tue, 13 Jun 2017 09:15:59 +0000 (12:15 +0300)]
qed: fix dump of context data

Currently when dumping a context data only word number '1' is read for the
entire context.

Fixes: c965db444629 ("qed: Add support for debug data collection")

Signed-off-by: Tomer Tayar <Tomer.Tayar@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoqmi_wwan: new Telewell and Sierra device IDs
Bjørn Mork [Tue, 13 Jun 2017 17:10:18 +0000 (19:10 +0200)]
qmi_wwan: new Telewell and Sierra device IDs

A new Sierra Wireless EM7305 device ID used in a Toshiba laptop,
and two Longcheer device IDs entries used by Telewell TW-3G HSPA+
branded modems.

Reported-by: Petr Kloc <petr_kloc@yahoo.com>
Reported-by: Teemu Likonen <tlikonen@iki.fi>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: phy: Fix MDIO_THUNDER dependencies
Florian Fainelli [Tue, 13 Jun 2017 00:18:51 +0000 (17:18 -0700)]
net: phy: Fix MDIO_THUNDER dependencies

After commit 90eff9096c01 ("net: phy: Allow splitting MDIO
bus/device support from PHYs") we could create a configuration where
MDIO_DEVICE=y and PHYLIB=m which leads to the following undefined
references:

 drivers/built-in.o: In function `thunder_mdiobus_pci_remove':
>> mdio-thunder.c:(.text+0x2a212f): undefined reference to
>> `mdiobus_unregister'
>> mdio-thunder.c:(.text+0x2a2138): undefined reference to
>> `mdiobus_free'
   drivers/built-in.o: In function `thunder_mdiobus_pci_probe':
   mdio-thunder.c:(.text+0x2a22e7): undefined reference to
`devm_mdiobus_alloc_size'
   mdio-thunder.c:(.text+0x2a236f): undefined reference to
`of_mdiobus_register'

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Fixes: 90eff9096c01 ("net: phy: Allow splitting MDIO bus/device support from PHYs")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonetconsole: Remove duplicate "netconsole: " logging prefix
Joe Perches [Mon, 12 Jun 2017 23:39:51 +0000 (16:39 -0700)]
netconsole: Remove duplicate "netconsole: " logging prefix

It's already added by pr_fmt so remove the explicit use.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoigmp: acquire pmc lock for ip_mc_clear_src()
WANG Cong [Mon, 12 Jun 2017 16:52:26 +0000 (09:52 -0700)]
igmp: acquire pmc lock for ip_mc_clear_src()

Andrey reported a use-after-free in add_grec():

        for (psf = *psf_list; psf; psf = psf_next) {
...
                psf_next = psf->sf_next;

where the struct ip_sf_list's were already freed by:

 kfree+0xe8/0x2b0 mm/slub.c:3882
 ip_mc_clear_src+0x69/0x1c0 net/ipv4/igmp.c:2078
 ip_mc_dec_group+0x19a/0x470 net/ipv4/igmp.c:1618
 ip_mc_drop_socket+0x145/0x230 net/ipv4/igmp.c:2609
 inet_release+0x4e/0x1c0 net/ipv4/af_inet.c:411
 sock_release+0x8d/0x1e0 net/socket.c:597
 sock_close+0x16/0x20 net/socket.c:1072

This happens because we don't hold pmc->lock in ip_mc_clear_src()
and a parallel mr_ifc_timer timer could jump in and access them.

The RCU lock is there but it is merely for pmc itself, this
spinlock could actually ensure we don't access them in parallel.

Thanks to Eric and Long for discussion on this bug.

Reported-by: Andrey Konovalov <andreyknvl@google.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Reviewed-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agor8152: give the device version
Oliver Neukum [Mon, 12 Jun 2017 11:56:51 +0000 (13:56 +0200)]
r8152: give the device version

Getting the device version out of the driver really aids debugging.

Signed-off-by: Oliver Neukum <oneukum@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: rps: fix uninitialized symbol warning
Ashwanth Goli [Tue, 13 Jun 2017 11:24:55 +0000 (16:54 +0530)]
net: rps: fix uninitialized symbol warning

This patch fixes uninitialized symbol warning that
got introduced by the following commit
773fc8f6e8d6 ("net: rps: send out pending IPI's on CPU hotplug")

Signed-off-by: Ashwanth Goli <ashwanth@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomac80211: don't send SMPS action frame in AP mode when not needed
Emmanuel Grumbach [Sat, 10 Jun 2017 10:52:45 +0000 (13:52 +0300)]
mac80211: don't send SMPS action frame in AP mode when not needed

mac80211 allows to modify the SMPS state of an AP both,
when it is started, and after it has been started. Such a
change will trigger an action frame to all the peers that
are currently connected, and will be remembered so that
new peers will get notified as soon as they connect (since
the SMPS setting in the beacon may not be the right one).

This means that we need to remember the SMPS state
currently requested as well as the SMPS state that was
configured initially (and advertised in the beacon).
The former is bss->req_smps and the latter is
sdata->smps_mode.

Initially, the AP interface could only be started with
SMPS_OFF, which means that sdata->smps_mode was SMPS_OFF
always. Later, a nl80211 API was added to be able to start
an AP with a different AP mode. That code forgot to update
bss->req_smps and because of that, if the AP interface was
started with SMPS_DYNAMIC, we had:
   sdata->smps_mode = SMPS_DYNAMIC
   bss->req_smps = SMPS_OFF

That configuration made mac80211 think it needs to fire off
an action frame to any new station connecting to the AP in
order to let it know that the actual SMPS configuration is
SMPS_OFF.

Fix that by properly setting bss->req_smps in
ieee80211_start_ap.

Fixes: f69931748730 ("mac80211: set smps_mode according to ap params")
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
7 years agomac80211/wpa: use constant time memory comparison for MACs
Jason A. Donenfeld [Sat, 10 Jun 2017 02:59:12 +0000 (04:59 +0200)]
mac80211/wpa: use constant time memory comparison for MACs

Otherwise, we enable all sorts of forgeries via timing attack.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: linux-wireless@vger.kernel.org
Cc: stable@vger.kernel.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
7 years agomac80211: set bss_info data before configuring the channel
Johannes Berg [Sat, 10 Jun 2017 10:52:43 +0000 (13:52 +0300)]
mac80211: set bss_info data before configuring the channel

When mac80211 changes the channel, it also calls into the driver's
bss_info_changed() callback, e.g. with BSS_CHANGED_IDLE. The driver
may, like iwlwifi does, access more data from bss_info in that case
and iwlwifi accesses the basic_rates bitmap, but if changing from a
band with more (basic) rates to one with fewer, an out-of-bounds
access of the rate array may result.

While we can't avoid having invalid data at some point in time, we
can avoid having it while we call the driver - so set up all the
data before configuring the channel, and then apply it afterwards.

This fixes https://bugzilla.kernel.org/show_bug.cgi?id=195677

Reported-by: Johannes Hirte <johannes.hirte@datenkhaos.de>
Tested-by: Johannes Hirte <johannes.hirte@datenkhaos.de>
Debugged-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
7 years agomac80211: remove 5/10 MHz rate code from station MLME
Johannes Berg [Sat, 10 Jun 2017 10:52:44 +0000 (13:52 +0300)]
mac80211: remove 5/10 MHz rate code from station MLME

There's no need for the station MLME code to handle bitrates for 5
or 10 MHz channels when it can't ever create such a configuration.
Remove the unnecessary code.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
7 years agomac80211: Fix incorrect condition when checking rx timestamp
Avraham Stern [Mon, 12 Jun 2017 07:44:58 +0000 (10:44 +0300)]
mac80211: Fix incorrect condition when checking rx timestamp

If the driver reports the rx timestamp at PLCP start, mac80211 can
only handle legacy encoding, but the code checks that the encoding
is not legacy. Fix this.

Fixes: da6a4352e7c8 ("mac80211: separate encoding/bandwidth from flags")
Signed-off-by: Avraham Stern <avraham.stern@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
7 years agomac80211: don't look at the PM bit of BAR frames
Emmanuel Grumbach [Thu, 8 Jun 2017 11:00:49 +0000 (14:00 +0300)]
mac80211: don't look at the PM bit of BAR frames

When a peer sends a BAR frame with PM bit clear, we should
not modify its PM state as madated by the spec in
802.11-20012 10.2.1.2.

Cc: stable@vger.kernel.org
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
7 years agoi40e: fix handling of HW ATR eviction
Jacob Keller [Mon, 12 Jun 2017 22:38:36 +0000 (15:38 -0700)]
i40e: fix handling of HW ATR eviction

A recent commit to refactor the driver and remove the hw_disabled_flags
field accidentally introduced two regressions. First, we overwrote
pf->flags which removed various key flags including the MSI-X settings.

Additionally, it was intended that we have now two flags,
HW_ATR_EVICT_CAPABLE and HW_ATR_EVICT_ENABLED, but this was not done,
and we accidentally were mis-using HW_ATR_EVICT_CAPABLE everywhere.

This patch adds the missing piece, HW_ATR_EVICT_ENABLED, and safely
updates pf->flags instead of overwriting it.

Without this patch we will have many problems including disabling MSI-X
support, and we'll attempt to use HW ATR eviction on devices which do
not support it.

Fixes: 47994c119a36 ("i40e: remove hw_disabled_flags in favor of using separate flag bits", 2017-04-19)
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agohsr: fix incorrect warning
Karicheri, Muralidharan [Mon, 12 Jun 2017 19:06:26 +0000 (15:06 -0400)]
hsr: fix incorrect warning

When HSR interface is setup using ip link command, an annoying warning
appears with the trace as below:-

[  203.019828] hsr_get_node: Non-HSR frame
[  203.019833] Modules linked in:
[  203.019848] CPU: 0 PID: 158 Comm: sd-resolve Tainted: G        W       4.12.0-rc3-00052-g9fa6bf70 #2
[  203.019853] Hardware name: Generic DRA74X (Flattened Device Tree)
[  203.019869] [<c0110280>] (unwind_backtrace) from [<c010c2f4>] (show_stack+0x10/0x14)
[  203.019880] [<c010c2f4>] (show_stack) from [<c04b9f64>] (dump_stack+0xac/0xe0)
[  203.019894] [<c04b9f64>] (dump_stack) from [<c01374e8>] (__warn+0xd8/0x104)
[  203.019907] [<c01374e8>] (__warn) from [<c0137548>] (warn_slowpath_fmt+0x34/0x44)
root@am57xx-evm:~# [  203.019921] [<c0137548>] (warn_slowpath_fmt) from [<c081126c>] (hsr_get_node+0x148/0x170)
[  203.019932] [<c081126c>] (hsr_get_node) from [<c0814240>] (hsr_forward_skb+0x110/0x7c0)
[  203.019942] [<c0814240>] (hsr_forward_skb) from [<c0811d64>] (hsr_dev_xmit+0x2c/0x34)
[  203.019954] [<c0811d64>] (hsr_dev_xmit) from [<c06c0828>] (dev_hard_start_xmit+0xc4/0x3bc)
[  203.019963] [<c06c0828>] (dev_hard_start_xmit) from [<c06c13d8>] (__dev_queue_xmit+0x7c4/0x98c)
[  203.019974] [<c06c13d8>] (__dev_queue_xmit) from [<c0782f54>] (ip6_finish_output2+0x330/0xc1c)
[  203.019983] [<c0782f54>] (ip6_finish_output2) from [<c0788f0c>] (ip6_output+0x58/0x454)
[  203.019994] [<c0788f0c>] (ip6_output) from [<c07b16cc>] (mld_sendpack+0x420/0x744)

As this is an expected path to hsr_get_node() with frame coming from
the master interface, add a check to ensure packet is not from the
master port and then warn.

Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoproc: snmp6: Use correct type in memset
Christian Perle [Mon, 12 Jun 2017 08:06:57 +0000 (10:06 +0200)]
proc: snmp6: Use correct type in memset

Reading /proc/net/snmp6 yields bogus values on 32 bit kernels.
Use "u64" instead of "unsigned long" in sizeof().

Fixes: 4a4857b1c81e ("proc: Reduce cache miss in snmp6_seq_show")
Signed-off-by: Christian Perle <christian.perle@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ipmr: Fix some mroute forwarding issues in vrf's
Donald Sharp [Sat, 10 Jun 2017 20:30:17 +0000 (16:30 -0400)]
net: ipmr: Fix some mroute forwarding issues in vrf's

This patch fixes two issues:

1) When forwarding on *,G mroutes that are in a vrf, the
kernel was dropping information about the actual incoming
interface when calling ip_mr_forward from ip_mr_input.
This caused ip_mr_forward to send the multicast packet
back out the incoming interface.  Fix this by
modifying ip_mr_forward to be handed the correctly
resolved dev.

2) When a unresolved cache entry is created we store
the incoming skb on the unresolved cache entry and
upon mroute resolution from the user space daemon,
we attempt to forward the packet.  Again we were
not resolving to the correct incoming device for
a vrf scenario, before calling ip_mr_forward.
Fix this by resolving to the correct interface
and calling ip_mr_forward with the result.

Fixes: e58e41596811 ("net: Enable support for VRF with ipv4 multicast")
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
Acked-by: David Ahern <dsahern@gmail.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Reviewed-by: Yotam Gigi <yotamg@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge tag 'mlx5-fixes-2017-06-11' of git://git.kernel.org/pub/scm/linux/kernel/git...
David S. Miller [Sun, 11 Jun 2017 20:40:52 +0000 (16:40 -0400)]
Merge tag 'mlx5-fixes-2017-06-11' of git://git./linux/kernel/git/saeed/linux

Saeed Mahameed says:

====================
Mellanox mlx5 fixes 2017-06-11

This series contains some fixes for the mlx5 core and netdev driver.

Please pull and let me know if there's any problem.

For -stable:
("net/mlx5e: Added BW check for DIM decision mechanism")              kernels >= 4.9
("net/mlx5e: Fix wrong indications in DIM due to counter wraparound") kernels >= 4.9
("net/mlx5: Remove several module events out of ethtool stats")       kernels >= 4.10
("net/mlx5: Enable 4K UAR only when page size is bigger than 4K")     kernels >= 4.11

*all patches apply with no issue on their -stable.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'ena-fixes'
David S. Miller [Sun, 11 Jun 2017 20:36:48 +0000 (16:36 -0400)]
Merge branch 'ena-fixes'

Netanel Belgazal says:

====================
Bugs fixes in ena ethernet driver

This patchset contains fixes for the bugs that were discovered so far.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ena: update ena driver to version 1.1.7
Netanel Belgazal [Sun, 11 Jun 2017 12:42:51 +0000 (15:42 +0300)]
net: ena: update ena driver to version 1.1.7

Signed-off-by: Netanel Belgazal <netanel@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ena: bug fix in lost tx packets detection mechanism
Netanel Belgazal [Sun, 11 Jun 2017 12:42:50 +0000 (15:42 +0300)]
net: ena: bug fix in lost tx packets detection mechanism

check_for_missing_tx_completions() is called from a timer
task and looking for lost tx packets.
The old implementation accumulate all the lost tx packets
and did not check if those packets were retrieved on a later stage.
This cause to a situation where the driver reset
the device for no reason.

Fixes: 1738cd3ed342 ("Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Netanel Belgazal <netanel@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ena: disable admin msix while working in polling mode
Netanel Belgazal [Sun, 11 Jun 2017 12:42:49 +0000 (15:42 +0300)]
net: ena: disable admin msix while working in polling mode

Fixes: 1738cd3ed342 ("Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Netanel Belgazal <netanel@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ena: fix theoretical Rx hang on low memory systems
Netanel Belgazal [Sun, 11 Jun 2017 12:42:48 +0000 (15:42 +0300)]
net: ena: fix theoretical Rx hang on low memory systems

For the rare case where the device runs out of free rx buffer
descriptors (in case of pressure on kernel  memory),
and the napi handler continuously fail to refill new Rx descriptors
until device rx queue totally runs out of all free rx buffers
to post incoming packet, leading to a deadlock:
* The device won't send interrupts since all the new
Rx packets will be dropped.
* The napi handler won't try to allocate new Rx descriptors
since allocation is part of NAPI that's not being invoked any more

The fix involves detecting this scenario and rescheduling NAPI
(to refill buffers) by the keepalive/watchdog task.

Fixes: 1738cd3ed342 ("Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Netanel Belgazal <netanel@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ena: add missing unmap bars on device removal
Netanel Belgazal [Sun, 11 Jun 2017 12:42:47 +0000 (15:42 +0300)]
net: ena: add missing unmap bars on device removal

This patch also change the mapping functions to devm_ functions

Fixes: 1738cd3ed342 ("Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Netanel Belgazal <netanel@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ena: fix race condition between submit and completion admin command
Netanel Belgazal [Sun, 11 Jun 2017 12:42:46 +0000 (15:42 +0300)]
net: ena: fix race condition between submit and completion admin command

Bug:
"Completion context is occupied" error printout will be noticed in
dmesg.
This error will cause the admin command to fail, which will lead to
an ena_probe() failure or a watchdog reset (depends on which admin
command failed).

Root cause:
__ena_com_submit_admin_cmd() is the function that submits new entries to
the admin queue.
The function have a check that makes sure the queue is not full and the
function does not override any outstanding command.
It uses head and tail indexes for this check.
The head is increased by ena_com_handle_admin_completion() which runs
from interrupt context, and the tail index is increased by the submit
function (the function is running under ->q_lock, so there is no risk
of multithread increment).
Each command is associated with a completion context. This context
allocated before call to __ena_com_submit_admin_cmd() and freed by
ena_com_wait_and_process_admin_cq_interrupts(), right after the command
was completed.

This can lead to a state where the head was increased, the check passed,
but the completion context is still in use.

Solution:
Use the atomic variable ->outstanding_cmds instead of using the head and
the tail indexes.
This variable is safe for use since it is bumped in get_comp_ctx() in
__ena_com_submit_admin_cmd() and is freed by comp_ctxt_release()

Fixes: 1738cd3ed342 ("Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Netanel Belgazal <netanel@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ena: add missing return when ena_com_get_io_handlers() fails
Netanel Belgazal [Sun, 11 Jun 2017 12:42:45 +0000 (15:42 +0300)]
net: ena: add missing return when ena_com_get_io_handlers() fails

Fixes: 1738cd3ed342 ("Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Netanel Belgazal <netanel@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ena: fix bug that might cause hang after consecutive open/close interface.
Netanel Belgazal [Sun, 11 Jun 2017 12:42:44 +0000 (15:42 +0300)]
net: ena: fix bug that might cause hang after consecutive open/close interface.

Fixing a bug that the driver does not unmask the IO interrupts
in ndo_open():
occasionally, the MSI-X interrupt (for one or more IO queues)
can be masked when ndo_close() was called.
If that is followed by ndo open(),
then the MSI-X will be still masked so no interrupt
will be received by the driver.

Fixes: 1738cd3ed342 ("Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Netanel Belgazal <netanel@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ena: fix rare uncompleted admin command false alarm
Netanel Belgazal [Sun, 11 Jun 2017 12:42:43 +0000 (15:42 +0300)]
net: ena: fix rare uncompleted admin command false alarm

The current flow to detect admin completion is:
while (command_not_completed) {
if (timeout)
error

check_for_completion()
sleep()
   }
So in case the sleep took more than the timeout
(in case the thread/workqueue was not scheduled due to higher priority
task or prolonged VMexit), the driver can detect a stall even if
the completion is present.

The fix changes the order of this function to first check for
completion and only after that check if the timeout expired.

Fixes: 1738cd3ed342 ("Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Netanel Belgazal <netanel@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet/mlx5: Enable 4K UAR only when page size is bigger than 4K
Majd Dibbiny [Sun, 28 May 2017 11:47:56 +0000 (14:47 +0300)]
net/mlx5: Enable 4K UAR only when page size is bigger than 4K

When the page size isn't bigger than 4K, there is no added value of enabling 4K
UAR feature in the Firmware.

Modified the condition of enabling the 4K UAR accordingly.

Fixes: f502d834950a ("net/mlx5: Activate support for 4K UARs")
Signed-off-by: Majd Dibbiny <majd@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
7 years agonet/mlx5e: Fix wrong indications in DIM due to counter wraparound
Tal Gilboa [Mon, 29 May 2017 14:02:55 +0000 (17:02 +0300)]
net/mlx5e: Fix wrong indications in DIM due to counter wraparound

DIM (Dynamically-tuned Interrupt Moderation) is a mechanism designed for
changing the channel interrupt moderation values in order to reduce CPU
overhead for all traffic types.
Each iteration of the algorithm, DIM calculates the difference in
throughput, packet rate and interrupt rate from last iteration in order
to make a decision. DIM relies on counters for each metric. When these
counters get to their type's max value they wraparound. In this case
the delta between 'end' and 'start' samples is negative and when
translated to unsigned integers - very high. This results in a false
indication to the algorithm and might result in a wrong decision.

The fix calculates the 'distance' between 'end' and 'start' samples in a
cyclic way around the relevant type's max value. It can also be viewed as
an absolute value around the type's max value instead of around 0.

Testing show higher stability in DIM profile selection and no wraparound
issues.

Fixes: cb3c7fd4f839 ("net/mlx5e: Support adaptive RX coalescing")
Signed-off-by: Tal Gilboa <talgi@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
7 years agonet/mlx5e: Added BW check for DIM decision mechanism
Tal Gilboa [Mon, 15 May 2017 11:13:16 +0000 (14:13 +0300)]
net/mlx5e: Added BW check for DIM decision mechanism

DIM (Dynamically-tuned Interrupt Moderation) is a mechanism designed for
changing the channel interrupt moderation values in order to reduce CPU
overhead for all traffic types.
Until now only interrupt and packet rate were sampled.
We found a scenario on which we get a false indication since a change in
DIM caused more aggregation and reduced packet rate while increasing BW.

We now regard a change as succesfull iff:
current_BW > (prev_BW + threshold) or
current_BW ~= prev_BW and current_PR > (prev_PR + threshold) or
current_BW ~= prev_BW and current_PR ~= prev_PR and
    current_IR < (prev_IR - threshold)
Where BW = Bandwidth, PR = Packet rate and IR = Interrupt rate

Improvements (ConnectX-4Lx 25GbE, single RX queue, LRO off)
    --------------------------------------------------
    packet size | before[Mb/s] | after[Mb/s] | gain  |
    2B          | 343.4        | 359.4       |  4.5% |
    16B         | 2739.7       | 2814.8      |  2.7% |
    64B         | 9739         | 10185.3     |  4.5% |

Fixes: cb3c7fd4f839 ("net/mlx5e: Support adaptive RX coalescing")
Signed-off-by: Tal Gilboa <talgi@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
7 years agonet/mlx5: Remove several module events out of ethtool stats
Huy Nguyen [Mon, 8 May 2017 16:46:50 +0000 (11:46 -0500)]
net/mlx5: Remove several module events out of ethtool stats

Remove the following module event counters out of ethtool stats. The
reason for removing these event counters is that these events do not
occur without techinician's intervention.
  module_pwr_budget_exd
  module_long_range
  module_no_eeprom
  module_enforce_part
  module_unknown_id
  module_unknown_status
  module_plug

Fixes: bedb7c909c19 ("net/mlx5e: Add port module event counters to ethtool stats")
Signed-off-by: Huy Nguyen <huyn@mellanox.com>
Reviewed by: Gal Pressman <galp@mellanox.com>

Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
7 years agonet/mlx5: Continue health polling until it is explicitly stopped
Mohamad Haj Yahia [Sun, 9 Apr 2017 14:19:37 +0000 (17:19 +0300)]
net/mlx5: Continue health polling until it is explicitly stopped

The issue is that when we get an assert we will stop polling the health
and thus we cant enter error state when we have a real health issue.

Fixes: fd76ee4da55a ('net/mlx5_core: Fix internal error detection conditions')
Signed-off-by: Mohamad Haj Yahia <mohamad@mellanox.com>
Reviewed-by: Daniel Jurgens <danielj@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
7 years agonet/mlx5: Fix create vport flow table flow
Mohamad Haj Yahia [Thu, 25 May 2017 13:46:14 +0000 (16:46 +0300)]
net/mlx5: Fix create vport flow table flow

Send vport number to the create flow table inner method instead of
ignoring the vport argument and sending always 0.

Fixes: b3ba51498bdd ('net/mlx5: Refactor create flow table method to accept underlay QP')
Signed-off-by: Mohamad Haj Yahia <mohamad@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
7 years agoMerge branch 'mvpp2-fixes'
David S. Miller [Sat, 10 Jun 2017 22:22:56 +0000 (18:22 -0400)]
Merge branch 'mvpp2-fixes'

Thomas Petazzoni says:

====================
net: mvpp2: driver fixes

As requested, here is a series of patches containing only bug fixes
for the mvpp2 driver. It is based on the latest "net" branch.

Changes since v1:

 - Fixed a build breakage that occurred when only PATCH 1 was only,
   and not later patches in the series. Was reported by the kbuild
   report on the first submission.

 - Added Tested-by from Marc Zyngier on PATCH 2.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: mvpp2: use {get, put}_cpu() instead of smp_processor_id()
Thomas Petazzoni [Sat, 10 Jun 2017 21:18:22 +0000 (23:18 +0200)]
net: mvpp2: use {get, put}_cpu() instead of smp_processor_id()

smp_processor_id() should not be used in migration-enabled contexts. We
originally thought it was OK in the specific situation of this driver,
but it was wrong, and calling smp_processor_id() in a migration-enabled
context prints a big fat warning when CONFIG_DEBUG_PREEMPT=y.

Therefore, this commit replaces the smp_processor_id() in
migration-enabled contexts by the appropriate get_cpu/put_cpu sections.

Reported-by: Marc Zyngier <marc.zyngier@arm.com>
Fixes: a786841df72e ("net: mvpp2: handle register mapping and access for PPv2.2")
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Tested-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: mvpp2: remove mvpp2_bm_cookie_{build,pool_get}
Thomas Petazzoni [Sat, 10 Jun 2017 21:18:21 +0000 (23:18 +0200)]
net: mvpp2: remove mvpp2_bm_cookie_{build,pool_get}

This commit removes the useless remove
mvpp2_bm_cookie_{build,pool_get} functions. All what
mvpp2_bm_cookie_build() was doing is compute a 32-bit value by
concatenating the pool number and the CPU number... only to get the pool
number re-extracted by mvpp2_bm_cookie_pool_get() later on.

Instead, just get the pool number directly from RX descriptor status,
and pass it to mvpp2_pool_refill() and mvpp2_rx_refill().

This has the added benefit of dropping a smp_processor_id() call in a
migration-enabled context, which is wrong, and is the original
motivation for making this change.

Fixes: 3f518509dedc9 ("ethernet: Add new driver for Marvell Armada 375 network unit")
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: tipc: Fix a sleep-in-atomic bug in tipc_msg_reverse
Jia-Ju Bai [Sat, 10 Jun 2017 09:03:35 +0000 (17:03 +0800)]
net: tipc: Fix a sleep-in-atomic bug in tipc_msg_reverse

The kernel may sleep under a rcu read lock in tipc_msg_reverse, and the
function call path is:
tipc_l2_rcv_msg (acquire the lock by rcu_read_lock)
  tipc_rcv
    tipc_sk_rcv
      tipc_msg_reverse
        pskb_expand_head(GFP_KERNEL) --> may sleep
tipc_node_broadcast
  tipc_node_xmit_skb
    tipc_node_xmit
      tipc_sk_rcv
        tipc_msg_reverse
          pskb_expand_head(GFP_KERNEL) --> may sleep

To fix it, "GFP_KERNEL" is replaced with "GFP_ATOMIC".

Signed-off-by: Jia-Ju Bai <baijiaju1990@163.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: caif: Fix a sleep-in-atomic bug in cfpkt_create_pfx
Jia-Ju Bai [Sat, 10 Jun 2017 08:49:39 +0000 (16:49 +0800)]
net: caif: Fix a sleep-in-atomic bug in cfpkt_create_pfx

The kernel may sleep under a rcu read lock in cfpkt_create_pfx, and the
function call path is:
cfcnfg_linkup_rsp (acquire the lock by rcu_read_lock)
  cfctrl_linkdown_req
    cfpkt_create
      cfpkt_create_pfx
        alloc_skb(GFP_KERNEL) --> may sleep
cfserl_receive (acquire the lock by rcu_read_lock)
  cfpkt_split
    cfpkt_create_pfx
      alloc_skb(GFP_KERNEL) --> may sleep

There is "in_interrupt" in cfpkt_create_pfx to decide use "GFP_KERNEL" or
"GFP_ATOMIC". In this situation, "GFP_KERNEL" is used because the function
is called under a rcu read lock, instead in interrupt.

To fix it, only "GFP_ATOMIC" is used in cfpkt_create_pfx.

Signed-off-by: Jia-Ju Bai <baijiaju1990@163.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoRevert "net: fec: Add a fec_enet_clear_ethtool_stats() stub for CONFIG_M5272"
David S. Miller [Sat, 10 Jun 2017 20:44:28 +0000 (16:44 -0400)]
Revert "net: fec: Add a fec_enet_clear_ethtool_stats() stub for CONFIG_M5272"

This reverts commit bf292f1b2c813f1d6ac49b04bd1a9863d8314266.

It belongs in 'net-next' not 'net'.

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agosctp: disable BH in sctp_for_each_endpoint
Xin Long [Sat, 10 Jun 2017 06:48:14 +0000 (14:48 +0800)]
sctp: disable BH in sctp_for_each_endpoint

Now sctp holds read_lock when foreach sctp_ep_hashtable without disabling
BH. If CPU schedules to another thread A at this moment, the thread A may
be trying to hold the write_lock with disabling BH.

As BH is disabled and CPU cannot schedule back to the thread holding the
read_lock, while the thread A keeps waiting for the read_lock. A dead
lock would be triggered by this.

This patch is to fix this dead lock by calling read_lock_bh instead to
disable BH when holding the read_lock in sctp_for_each_endpoint.

Fixes: 626d16f50f39 ("sctp: export some apis or variables for sctp_diag and reuse some for proc")
Reported-by: Xiumei Mu <xmu@redhat.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: fec: Add a fec_enet_clear_ethtool_stats() stub for CONFIG_M5272
Fabio Estevam [Sat, 10 Jun 2017 01:37:22 +0000 (22:37 -0300)]
net: fec: Add a fec_enet_clear_ethtool_stats() stub for CONFIG_M5272

Commit 2b30842b23b9 ("net: fec: Clear and enable MIB counters on imx51")
introduced fec_enet_clear_ethtool_stats(), but missed to add a stub
for the CONFIG_M5272=y case, causing build failure for the
m5272c3_defconfig.

Add the missing empty stub to fix the build failure.

Reported-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agol2tp: cast l2tp traffic counter to unsigned
Dominik Heidler [Fri, 9 Jun 2017 14:29:47 +0000 (16:29 +0200)]
l2tp: cast l2tp traffic counter to unsigned

This fixes a counter problem on 32bit systems:
When the rx_bytes counter reached 2 GiB, it jumpd to (2^64 Bytes - 2GiB) Bytes.

rtnl_link_stats64 has __u64 type and atomic_long_read returns
atomic_long_t which is signed. Due to the conversation
we get an incorrect value on 32bit systems if the MSB of
the atomic_long_t value is set.

CC: Tom Parkin <tparkin@katalix.com>
Fixes: 7b7c0719cd7a ("l2tp: avoid deadlock in l2tp stats update")
Signed-off-by: Dominik Heidler <dheidler@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: aquantia: atlantic: remove declaration of hw_atl_utils_hw_set_power
Philippe Reynes [Fri, 9 Jun 2017 21:50:57 +0000 (23:50 +0200)]
net: aquantia: atlantic: remove declaration of hw_atl_utils_hw_set_power

This function is not defined, so no need to declare it.

As I don't have the hardware, I'd be very pleased if
someone may test this patch.

Signed-off-by: Philippe Reynes <tremyfr@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'bnx2x-Fix-malicious-VFs-indication'
David S. Miller [Sat, 10 Jun 2017 20:02:56 +0000 (16:02 -0400)]
Merge branch 'bnx2x-Fix-malicious-VFs-indication'

Yuval Mintz says:

====================
bnx2x: Fix malicious VFs indication

It was discovered that for a VF there's a simple [yet uncommon] scenario
which would cause device firmware to declare that VF as malicious -
Add a vlan interface on top of a VF and disable txvlan offloading for
that VF [causing VF to transmit packets where vlan is on payload].

Patch #1 corrects driver transmission to prevent this issue.
Patch #2 is a by-product correcting PF behavior once a VF is declared
malicious.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobnx2x: Don't post statistics to malicious VFs
Mintz, Yuval [Fri, 9 Jun 2017 14:17:02 +0000 (17:17 +0300)]
bnx2x: Don't post statistics to malicious VFs

Once firmware indicates that a given VF is malicious and until
that VF passes an FLR all bets are off - PF can't know anything
is happening to the VF [since VF can't communicate anything to its PF].
But PF is currently still periodically asking device to collect
statistics for the VF which might in turn fill logs by IOMMU blocking
memory access done by the VF's PCI function [in the case VF has unmapped
its buffers].

Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobnx2x: Allow vfs to disable txvlan offload
Mintz, Yuval [Fri, 9 Jun 2017 14:17:01 +0000 (17:17 +0300)]
bnx2x: Allow vfs to disable txvlan offload

VF clients are configured as enforced, meaning firmware is validating
the correctness of their ethertype/vid during transmission.
Once txvlan is disabled, VF would start getting SKBs for transmission
here vlan is on the payload - but it'll pass the packet's ethertype
instead of the vid, leading to firmware declaring it as malicious.

Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge tag 'linux-can-fixes-for-4.12-20170609' of git://git.kernel.org/pub/scm/linux...
David S. Miller [Fri, 9 Jun 2017 19:41:57 +0000 (15:41 -0400)]
Merge tag 'linux-can-fixes-for-4.12-20170609' of git://git./linux/kernel/git/mkl/linux-can

Marc Kleine-Budde says:

====================
pull-request: can 2017-06-09

this is a pull request of 6 patches for net/master.

There's a patch by Stephane Grosjean that fixes an uninitialized symbol warning
in the peak_canfd driver. A patch by Johan Hovold to fix the product-id
endianness in an error message in the the peak_usb driver. A patch by Oliver
Hartkopp to enable CAN FD for virtual CAN devices by default. Three patches by
me, one makes the helper function can_change_state() robust to be called with
cf == NULL. The next patch fixes a memory leak in the gs_usb driver. And the
last one fixes a lockdep splat by properly initialize the per-net
can_rcvlists_lock spin_lock.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomac80211: free netdev on dev_alloc_name() error
Johannes Berg [Fri, 9 Jun 2017 19:33:09 +0000 (21:33 +0200)]
mac80211: free netdev on dev_alloc_name() error

The change to remove free_netdev() from ieee80211_if_free()
erroneously didn't add the necessary free_netdev() for when
ieee80211_if_free() is called directly in one place, rather
than as the priv_destructor. Add the missing call.

Fixes: cf124db566e6 ("net: Fix inconsistent teardown and release of private netdev state.")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: rps: send out pending IPI's on CPU hotplug
ashwanth@codeaurora.org [Fri, 9 Jun 2017 08:54:58 +0000 (14:24 +0530)]
net: rps: send out pending IPI's on CPU hotplug

IPI's from the victim cpu are not handled in dev_cpu_callback.
So these pending IPI's would be sent to the remote cpu only when
NET_RX is scheduled on the victim cpu and since this trigger is
unpredictable it would result in packet latencies on the remote cpu.

This patch add support to send the pending ipi's of victim cpu.

Signed-off-by: Ashwanth Goli <ashwanth@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agostmmac: fix for hw timestamp of GMAC3 unit
Mario Molitor [Thu, 8 Jun 2017 21:03:09 +0000 (23:03 +0200)]
stmmac: fix for hw timestamp of GMAC3 unit

1.) Bugfix of function stmmac_get_tx_hwtstamp.
    Corrected the tx timestamp available check (same as 4.8 and older)
    Change printout from info syslevel to debug.

2.) Bugfix of function stmmac_get_rx_hwtstamp.
    Corrected the rx timestamp available check (same as 4.8 and older)
    Change printout from info syslevel to debug.

Fixes: ba1ffd74df74 ("stmmac: fix PTP support for GMAC4")
Signed-off-by: Mario Molitor <mario_molitor@web.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agostmmac: fix ptp header for GMAC3 hw timestamp
Mario Molitor [Thu, 8 Jun 2017 20:41:02 +0000 (22:41 +0200)]
stmmac: fix ptp header for GMAC3 hw timestamp

According the CYCLON V documention only the bit 16 of snaptypesel should
set.
(more information see Table 17-20 (cv_5v4.pdf) :
 Timestamp Snapshot Dependency on Register Bits)

Fixes: d2042052a0aa ("stmmac: update the PTP header file")
Signed-off-by: Mario Molitor <mario_molitor@web.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoFix an intermittent pr_emerg warning about lo becoming free.
Krister Johansen [Thu, 8 Jun 2017 20:12:38 +0000 (13:12 -0700)]
Fix an intermittent pr_emerg warning about lo becoming free.

It looks like this:

Message from syslogd@flamingo at Apr 26 00:45:00 ...
 kernel:unregister_netdevice: waiting for lo to become free. Usage count = 4

They seem to coincide with net namespace teardown.

The message is emitted by netdev_wait_allrefs().

Forced a kdump in netdev_run_todo, but found that the refcount on the lo
device was already 0 at the time we got to the panic.

Used bcc to check the blocking in netdev_run_todo.  The only places
where we're off cpu there are in the rcu_barrier() and msleep() calls.
That behavior is expected.  The msleep time coincides with the amount of
time we spend waiting for the refcount to reach zero; the rcu_barrier()
wait times are not excessive.

After looking through the list of callbacks that the netdevice notifiers
invoke in this path, it appears that the dst_dev_event is the most
interesting.  The dst_ifdown path places a hold on the loopback_dev as
part of releasing the dev associated with the original dst cache entry.
Most of our notifier callbacks are straight-forward, but this one a)
looks complex, and b) places a hold on the network interface in
question.

I constructed a new bcc script that watches various events in the
liftime of a dst cache entry.  Note that dst_ifdown will take a hold on
the loopback device until the invalidated dst entry gets freed.

[      __dst_free] on DST: ffff883ccabb7900 IF tap1008300eth0 invoked at 1282115677036183
    __dst_free
    rcu_nocb_kthread
    kthread
    ret_from_fork
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoaf_unix: Add sockaddr length checks before accessing sa_family in bind and connect...
Mateusz Jurczyk [Thu, 8 Jun 2017 09:13:36 +0000 (11:13 +0200)]
af_unix: Add sockaddr length checks before accessing sa_family in bind and connect handlers

Verify that the caller-provided sockaddr structure is large enough to
contain the sa_family field, before accessing it in bind() and connect()
handlers of the AF_UNIX socket. Since neither syscall enforces a minimum
size of the corresponding memory region, very short sockaddrs (zero or
one byte long) result in operating on uninitialized memory while
referencing .sa_family.

Signed-off-by: Mateusz Jurczyk <mjurczyk@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: phy: add missing SPEED_14000
Joe Perches [Fri, 9 Jun 2017 13:45:32 +0000 (15:45 +0200)]
net: phy: add missing SPEED_14000

Fixes: 0d7e2d2166f6 ("IB/ipoib: add get_link_ksettings in ethtool")
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agocan: enable CAN FD for virtual CAN devices by default
Oliver Hartkopp [Fri, 2 Jun 2017 17:37:30 +0000 (19:37 +0200)]
can: enable CAN FD for virtual CAN devices by default

CAN FD capable CAN interfaces can handle (classic) CAN 2.0 frames too.
New users usually fail at their first attempt to explore CAN FD on
virtual CAN interfaces due to the current CAN_MTU default.

Set the MTU to CANFD_MTU by default to reduce this confusion.
If someone *really* needs a 'classic CAN'-only device this can be set
with the 'ip' tool with e.g. 'ip link set vcan0 mtu 16' as before.

Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
7 years agocan: af_can: namespace support: fix lockdep splat: properly initialize spin_lock
Marc Kleine-Budde [Tue, 6 Jun 2017 11:53:16 +0000 (13:53 +0200)]
can: af_can: namespace support: fix lockdep splat: properly initialize spin_lock

This patch uses spin_lock_init() instead of __SPIN_LOCK_UNLOCKED() to
initialize the per namespace net->can.can_rcvlists_lock lock to fix this
lockdep warning:

| INFO: trying to register non-static key.
| the code is fine but needs lockdep annotation.
| turning off the locking correctness validator.
| CPU: 0 PID: 186 Comm: candump Not tainted 4.12.0-rc3+ #47
| Hardware name: Marvell Kirkwood (Flattened Device Tree)
| [<c0016644>] (unwind_backtrace) from [<c00139a8>] (show_stack+0x18/0x1c)
| [<c00139a8>] (show_stack) from [<c0058c8c>] (register_lock_class+0x1e4/0x55c)
| [<c0058c8c>] (register_lock_class) from [<c005bdfc>] (__lock_acquire+0x148/0x1990)
| [<c005bdfc>] (__lock_acquire) from [<c005deec>] (lock_acquire+0x174/0x210)
| [<c005deec>] (lock_acquire) from [<c04a6780>] (_raw_spin_lock+0x50/0x88)
| [<c04a6780>] (_raw_spin_lock) from [<bf02116c>] (can_rx_register+0x94/0x15c [can])
| [<bf02116c>] (can_rx_register [can]) from [<bf02a868>] (raw_enable_filters+0x60/0xc0 [can_raw])
| [<bf02a868>] (raw_enable_filters [can_raw]) from [<bf02ac14>] (raw_enable_allfilters+0x2c/0xa0 [can_raw])
| [<bf02ac14>] (raw_enable_allfilters [can_raw]) from [<bf02ad38>] (raw_bind+0xb0/0x250 [can_raw])
| [<bf02ad38>] (raw_bind [can_raw]) from [<c03b5fb8>] (SyS_bind+0x70/0xac)
| [<c03b5fb8>] (SyS_bind) from [<c000f8c0>] (ret_fast_syscall+0x0/0x1c)

Cc: Mario Kicherer <dev@kicherer.org>
Acked-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
7 years agocan: gs_usb: fix memory leak in gs_cmd_reset()
Marc Kleine-Budde [Sun, 4 Jun 2017 12:03:42 +0000 (14:03 +0200)]
can: gs_usb: fix memory leak in gs_cmd_reset()

This patch adds the missing kfree() in gs_cmd_reset() to free the
memory that is not used anymore after usb_control_msg().

Cc: linux-stable <stable@vger.kernel.org>
Cc: Maximilian Schneider <max@schneidersoft.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
7 years agocan: peak_usb: fix product-id endianness in error message
Johan Hovold [Fri, 12 May 2017 10:09:25 +0000 (12:09 +0200)]
can: peak_usb: fix product-id endianness in error message

Make sure to use the USB device product-id stored in host-byte order in
a probe error message.

Also remove a redundant reassignment of the local usb_dev variable which
had already been used to retrieve the product id.

Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
7 years agocan: peak_canfd: fix uninitialized symbol warnings
Stephane Grosjean [Wed, 3 May 2017 08:35:04 +0000 (10:35 +0200)]
can: peak_canfd: fix uninitialized symbol warnings

This patch fixes two uninitialized symbol warnings in the new code adding
support of the PEAK-System PCAN-PCI Express FD boards, in the socket-CAN
network protocol family.

Signed-off-by: Stephane Grosjean <s.grosjean@peak-system.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
7 years agocan: dev: make can_change_state() robust to be called with cf == NULL
Marc Kleine-Budde [Thu, 18 May 2017 08:22:22 +0000 (10:22 +0200)]
can: dev: make can_change_state() robust to be called with cf == NULL

In OOM situations where no skb can be allocated, can_change_state() may
be called with cf == NULL. As this function updates the state and error
statistics it's not an option to skip the call to can_change_state() in
OOM situations.

This patch makes can_change_state() robust, so that it can be called
with cf == NULL.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
7 years agonet: vrf: Make add_fib_rules per network namespace flag
David Ahern [Thu, 8 Jun 2017 17:31:11 +0000 (11:31 -0600)]
net: vrf: Make add_fib_rules per network namespace flag

Commit 1aa6c4f6b8cd8 ("net: vrf: Add l3mdev rules on first device create")
adds the l3mdev FIB rule the first time a VRF device is created. However,
it only creates the rule once and only in the namespace the first device
is created - which may not be init_net. Fix by using the net_generic
capability to make the add_fib_rules flag per network namespace.

Fixes: 1aa6c4f6b8cd8 ("net: vrf: Add l3mdev rules on first device create")
Reported-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf, tests: fix endianness selection
Daniel Borkmann [Thu, 8 Jun 2017 17:06:25 +0000 (19:06 +0200)]
bpf, tests: fix endianness selection

I noticed that test_l4lb was failing in selftests:

  # ./test_progs
  test_pkt_access:PASS:ipv4 77 nsec
  test_pkt_access:PASS:ipv6 44 nsec
  test_xdp:PASS:ipv4 2933 nsec
  test_xdp:PASS:ipv6 1500 nsec
  test_l4lb:PASS:ipv4 377 nsec
  test_l4lb:PASS:ipv6 544 nsec
  test_l4lb:FAIL:stats 6297600000 200000
  test_tcp_estats:PASS: 0 nsec
  Summary: 7 PASSED, 1 FAILED

Tracking down the issue actually revealed that endianness selection
in bpf_endian.h is broken when compiled with clang with bpf target.
test_pkt_access.c, test_l4lb.c is compiled with __BYTE_ORDER as
__BIG_ENDIAN, test_xdp.c as __LITTLE_ENDIAN! test_l4lb noticeably
fails, because the test accounts bytes via bpf_ntohs(ip6h->payload_len)
and bpf_ntohs(iph->tot_len), and compares them against a defined
value and given a wrong endianness, the test outcome is different,
of course.

Turns out that there are actually two bugs: i) when we do __BYTE_ORDER
comparison with __LITTLE_ENDIAN/__BIG_ENDIAN, then depending on the
include order we see different outcomes. Reason is that __BYTE_ORDER
is undefined due to missing endian.h include. Before we include the
asm/byteorder.h (e.g. through linux/in.h), then __BYTE_ORDER equals
__LITTLE_ENDIAN since both are undefined, after the include which
correctly pulls in linux/byteorder/little_endian.h, __LITTLE_ENDIAN
is defined, but given __BYTE_ORDER is still undefined, we match on
__BYTE_ORDER equals to __BIG_ENDIAN since __BIG_ENDIAN is also
undefined at that point, sigh. ii) But even that would be wrong,
since when compiling the test cases with clang, one can select between
bpfeb and bpfel targets for cross compilation. Hence, we can also not
rely on what the system's endian.h provides, but we need to look at
the compiler's defined endianness. The compiler defines __BYTE_ORDER__,
and we can match __ORDER_LITTLE_ENDIAN__ and __ORDER_BIG_ENDIAN__,
which also reflects targets bpf (native), bpfel, bpfeb correctly,
thus really only rely on that. After patch:

  # ./test_progs
  test_pkt_access:PASS:ipv4 74 nsec
  test_pkt_access:PASS:ipv6 42 nsec
  test_xdp:PASS:ipv4 2340 nsec
  test_xdp:PASS:ipv6 1461 nsec
  test_l4lb:PASS:ipv4 400 nsec
  test_l4lb:PASS:ipv6 530 nsec
  test_tcp_estats:PASS: 0 nsec
  Summary: 7 PASSED, 0 FAILED

Fixes: 43bcf707ccdc ("bpf: fix _htons occurences in test_progs")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoethtool.h: remind to update 802.3ad when adding new speeds
Nicolas Dichtel [Thu, 8 Jun 2017 09:18:13 +0000 (11:18 +0200)]
ethtool.h: remind to update 802.3ad when adding new speeds

Each time a new speed is added, the bonding 802.3ad isn't updated. Add a
comment to remind the developer to update this driver.

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobonding: fix 802.3ad support for 14G speed
Nicolas Dichtel [Thu, 8 Jun 2017 09:18:12 +0000 (11:18 +0200)]
bonding: fix 802.3ad support for 14G speed

This patch adds 14 Gbps enum definition, and fixes
aggregated bandwidth calculation based on above slave links.

Fixes: 0d7e2d2166f6 ("IB/ipoib: add get_link_ksettings in ethtool")
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobonding: fix 802.3ad support for 5G and 50G speeds
Thibaut Collet [Thu, 8 Jun 2017 09:18:11 +0000 (11:18 +0200)]
bonding: fix 802.3ad support for 5G and 50G speeds

This patch adds [5|50] Gbps enum definition, and fixes
aggregated bandwidth calculation based on above slave links.

Fixes: c9a70d43461d ("net-next: ethtool: Added port speed macros.")
Signed-off-by: Thibaut Collet <thibaut.collet@6wind.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoopenvswitch: warn about missing first netlink attribute
Nicolas Dichtel [Thu, 8 Jun 2017 08:37:45 +0000 (10:37 +0200)]
openvswitch: warn about missing first netlink attribute

The first netlink attribute (value 0) must always be defined
as none/unspec.

Because we cannot change an existing UAPI, I add a comment to point the
mistake and avoid to propagate it in a new ovs API in the future.

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoila_xlat: add missing hash secret initialization
Arnd Bergmann [Thu, 8 Jun 2017 07:54:24 +0000 (09:54 +0200)]
ila_xlat: add missing hash secret initialization

While discussing the possible merits of clang warning about unused initialized
functions, I found one function that was clearly meant to be called but
never actually is.

__ila_hash_secret_init() initializes the hash value for the ila locator,
apparently this is intended to prevent hash collision attacks, but this ends
up being a read-only zero constant since there is no caller. I could find
no indication of why it was never called, the earliest patch submission
for the module already was like this. If my interpretation is right, we
certainly want to backport the patch to stable kernels as well.

I considered adding it to the ila_xlat_init callback, but for best effect
the random data is read as late as possible, just before it is first used.
The underlying net_get_random_once() is already highly optimized to avoid
overhead when called frequently.

Fixes: 7f00feaf1076 ("ila: Add generic ILA translation facility")
Cc: stable@vger.kernel.org
Link: https://www.spinics.net/lists/kernel/msg2527243.html
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: Fix build regression in rtl8723bs staging driver.
David S. Miller [Thu, 8 Jun 2017 15:51:59 +0000 (11:51 -0400)]
net: Fix build regression in rtl8723bs staging driver.

drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c: In function ‘rtw_cfg80211_add_monitor_if’:
drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c:2670:10: error: ‘struct net_device’ has no member named ‘destructor’
  mon_ndev->destructor = rtw_ndev_destructor;
          ^

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'netvsc-bug-fixes'
David S. Miller [Thu, 8 Jun 2017 15:45:49 +0000 (11:45 -0400)]
Merge branch 'netvsc-bug-fixes'

Stephen Hemminger says:

====================
netvsc: bug fixes

These are bugfixes for netvsc driver in 4.12.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonetvsc: move filter setting to rndis_device
stephen hemminger [Wed, 7 Jun 2017 22:53:49 +0000 (15:53 -0700)]
netvsc: move filter setting to rndis_device

The work queue and handling of network filter parameters should
be in rndis_device. This gets rid of warning from RCU checks,
eliminates a race and cleans up code.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonetvsc: fix net poll mode
stephen hemminger [Wed, 7 Jun 2017 22:53:48 +0000 (15:53 -0700)]
netvsc: fix net poll mode

The ndo_poll_controller function needs to schedule NAPI to pick
up arriving packets and send completions. Otherwise no data
will ever be received. For simple case of netconsole, it also
will allow send completions to happen.  Without this netpoll
will eventually get stuck.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonetvsc: fix rcu dereference warning from ethtool
stephen hemminger [Wed, 7 Jun 2017 22:53:47 +0000 (15:53 -0700)]
netvsc: fix rcu dereference warning from ethtool

The ethtool info command calls the netvsc get_sset_count with RTNL
but not with RCU. Which causes warning:

drivers/net/hyperv/netvsc_drv.c:1010 suspicious rcu_dereference_check() usage!

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ipv6: Release route when device is unregistering
David Ahern [Wed, 7 Jun 2017 18:26:23 +0000 (12:26 -0600)]
net: ipv6: Release route when device is unregistering

Roopa reported attempts to delete a bond device that is referenced in a
multipath route is hanging:

$ ifdown bond2    # ifupdown2 command that deletes virtual devices
unregister_netdevice: waiting for bond2 to become free. Usage count = 2

Steps to reproduce:
    echo 1 > /proc/sys/net/ipv6/conf/all/ignore_routes_with_linkdown
    ip link add dev bond12 type bond
    ip link add dev bond13 type bond
    ip addr add 2001:db8:2::0/64 dev bond12
    ip addr add 2001:db8:3::0/64 dev bond13
    ip route add 2001:db8:33::0/64 nexthop via 2001:db8:2::2 nexthop via 2001:db8:3::2
    ip link del dev bond12
    ip link del dev bond13

The root cause is the recent change to keep routes on a linkdown. Update
the check to detect when the device is unregistering and release the
route for that case.

Fixes: a1a22c12060e4 ("net: ipv6: Keep nexthop of multipath route on admin down")
Reported-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
Acked-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: Zero ifla_vf_info in rtnl_fill_vfinfo()
Mintz, Yuval [Wed, 7 Jun 2017 18:00:33 +0000 (21:00 +0300)]
net: Zero ifla_vf_info in rtnl_fill_vfinfo()

Some of the structure's fields are not initialized by the
rtnetlink. If driver doesn't set those in ndo_get_vf_config(),
they'd leak memory to user.

Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
CC: Michal Schmidt <mschmidt@redhat.com>
Reviewed-by: Greg Rose <gvrose8192@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agodecnet: dn_rtmsg: Improve input length sanitization in dnrmg_receive_user_skb
Mateusz Jurczyk [Wed, 7 Jun 2017 14:14:29 +0000 (16:14 +0200)]
decnet: dn_rtmsg: Improve input length sanitization in dnrmg_receive_user_skb

Verify that the length of the socket buffer is sufficient to cover the
nlmsghdr structure before accessing the nlh->nlmsg_len field for further
input sanitization. If the client only supplies 1-3 bytes of data in
sk_buff, then nlh->nlmsg_len remains partially uninitialized and
contains leftover memory from the corresponding kernel allocation.
Operating on such data may result in indeterminate evaluation of the
nlmsg_len < sizeof(*nlh) expression.

The bug was discovered by a runtime instrumentation designed to detect
use of uninitialized memory in the kernel. The patch prevents this and
other similar tools (e.g. KMSAN) from flagging this behavior in the future.

Signed-off-by: Mateusz Jurczyk <mjurczyk@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoRevert "decnet: dn_rtmsg: Improve input length sanitization in dnrmg_receive_user_skb"
David S. Miller [Thu, 8 Jun 2017 14:50:18 +0000 (10:50 -0400)]
Revert "decnet: dn_rtmsg: Improve input length sanitization in dnrmg_receive_user_skb"

This reverts commit 85eac2ba35a2dbfbdd5767c7447a4af07444a5b4.

There is an updated version of this fix which we should
use instead.

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: emac: fix and unify emac_mdio functions
Christian Lamparter [Wed, 7 Jun 2017 13:51:16 +0000 (15:51 +0200)]
net: emac: fix and unify emac_mdio functions

emac_mdio_read_link() was not copying the requested phy settings
back into the emac driver's own phy api. This has caused a link
speed mismatch issue for the AR8035 as the emac driver kept
trying to connect with 10/100MBps on a 1GBit/s link.

This patch also unifies shared code between emac_setup_aneg()
and emac_mdio_setup_forced(). And furthermore it removes
a chunk of emac_mdio_init_phy(), that was copying the same
data into itself.

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: emac: fix reset timeout with AR8035 phy
Christian Lamparter [Wed, 7 Jun 2017 13:51:15 +0000 (15:51 +0200)]
net: emac: fix reset timeout with AR8035 phy

This patch fixes a problem where the AR8035 PHY can't be
detected on an Cisco Meraki MR24, if the ethernet cable is
not connected on boot.

Russell Senior provided steps to reproduce the issue:
|Disconnect ethernet cable, apply power, wait until device has booted,
|plug in ethernet, check for interfaces, no eth0 is listed.
|
|This appears to be a problem during probing of the AR8035 Phy chip.
|When ethernet has no link, the phy detection fails, and eth0 is not
|created. Plugging ethernet later has no effect, because there is no
|interface as far as the kernel is concerned. The relevant part of
|the boot log looks like this:
|this is the failing case:
|
|[    0.876611] /plb/opb/emac-rgmii@ef601500: input 0 in RGMII mode
|[    0.882532] /plb/opb/ethernet@ef600c00: reset timeout
|[    0.888546] /plb/opb/ethernet@ef600c00: can't find PHY!
|and the succeeding case:
|
|[    0.876672] /plb/opb/emac-rgmii@ef601500: input 0 in RGMII mode
|[    0.883952] eth0: EMAC-0 /plb/opb/ethernet@ef600c00, MAC 00:01:..
|[    0.890822] eth0: found Atheros 8035 Gigabit Ethernet PHY (0x01)

Based on the comment and the commit message of
commit 23fbb5a87c56 ("emac: Fix EMAC soft reset on 460EX/GT").
This is because the AR8035 PHY doesn't provide the TX Clock,
if the ethernet cable is not attached. This causes the reset
to timeout and the PHY detection code in emac_init_phy() is
unable to detect the AR8035 PHY. As a result, the emac driver
bails out early and the user left with no ethernet.

In order to stay compatible with existing configurations, the driver
tries the current reset approach at first. Only if the first attempt
timed out, it does perform one more retry with the clock temporarily
switched to the internal source for just the duration of the reset.

LEDE-Bug: #687 <https://bugs.lede-project.org/index.php?do=details&task_id=687>

Cc: Chris Blake <chrisrblake93@gmail.com>
Reported-by: Russell Senior <russell@personaltelco.net>
Fixes: 23fbb5a87c56e98 ("emac: Fix EMAC soft reset on 460EX/GT")
Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agodecnet: dn_rtmsg: Improve input length sanitization in dnrmg_receive_user_skb
Mateusz Jurczyk [Wed, 7 Jun 2017 13:14:29 +0000 (15:14 +0200)]
decnet: dn_rtmsg: Improve input length sanitization in dnrmg_receive_user_skb

Verify that the length of the socket buffer is sufficient to cover the
entire nlh->nlmsg_len field before accessing that field for further
input sanitization. If the client only supplies 1-3 bytes of data in
sk_buff, then nlh->nlmsg_len remains partially uninitialized and
contains leftover memory from the corresponding kernel allocation.
Operating on such data may result in indeterminate evaluation of the
nlmsg_len < sizeof(*nlh) expression.

The bug was discovered by a runtime instrumentation designed to detect
use of uninitialized memory in the kernel. The patch prevents this and
other similar tools (e.g. KMSAN) from flagging this behavior in the future.

Signed-off-by: Mateusz Jurczyk <mjurczyk@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agohsi: Fix build regression due to netdev destructor fix.
David S. Miller [Thu, 8 Jun 2017 14:16:05 +0000 (10:16 -0400)]
hsi: Fix build regression due to netdev destructor fix.

> ../drivers/hsi/clients/ssi_protocol.c:1069:5: error: 'struct net_device' has no member named 'destructor'

Reported-by: Mark Brown <broonie@kernel.org>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: s390: fix up for "Fix inconsistent teardown and release of private netdev state"
Stephen Rothwell [Thu, 8 Jun 2017 09:06:29 +0000 (19:06 +1000)]
net: s390: fix up for "Fix inconsistent teardown and release of private netdev state"

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: Fix inconsistent teardown and release of private netdev state.
David S. Miller [Mon, 8 May 2017 16:52:56 +0000 (12:52 -0400)]
net: Fix inconsistent teardown and release of private netdev state.

Network devices can allocate reasources and private memory using
netdev_ops->ndo_init().  However, the release of these resources
can occur in one of two different places.

Either netdev_ops->ndo_uninit() or netdev->destructor().

The decision of which operation frees the resources depends upon
whether it is necessary for all netdev refs to be released before it
is safe to perform the freeing.

netdev_ops->ndo_uninit() presumably can occur right after the
NETDEV_UNREGISTER notifier completes and the unicast and multicast
address lists are flushed.

netdev->destructor(), on the other hand, does not run until the
netdev references all go away.

Further complicating the situation is that netdev->destructor()
almost universally does also a free_netdev().

This creates a problem for the logic in register_netdevice().
Because all callers of register_netdevice() manage the freeing
of the netdev, and invoke free_netdev(dev) if register_netdevice()
fails.

If netdev_ops->ndo_init() succeeds, but something else fails inside
of register_netdevice(), it does call ndo_ops->ndo_uninit().  But
it is not able to invoke netdev->destructor().

This is because netdev->destructor() will do a free_netdev() and
then the caller of register_netdevice() will do the same.

However, this means that the resources that would normally be released
by netdev->destructor() will not be.

Over the years drivers have added local hacks to deal with this, by
invoking their destructor parts by hand when register_netdevice()
fails.

Many drivers do not try to deal with this, and instead we have leaks.

Let's close this hole by formalizing the distinction between what
private things need to be freed up by netdev->destructor() and whether
the driver needs unregister_netdevice() to perform the free_netdev().

netdev->priv_destructor() performs all actions to free up the private
resources that used to be freed by netdev->destructor(), except for
free_netdev().

netdev->needs_free_netdev is a boolean that indicates whether
free_netdev() should be done at the end of unregister_netdevice().

Now, register_netdevice() can sanely release all resources after
ndo_ops->ndo_init() succeeds, by invoking both ndo_ops->ndo_uninit()
and netdev->priv_destructor().

And at the end of unregister_netdevice(), we invoke
netdev->priv_destructor() and optionally call free_netdev().

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf, arm64: use separate register for state in stxr
Daniel Borkmann [Wed, 7 Jun 2017 11:45:37 +0000 (13:45 +0200)]
bpf, arm64: use separate register for state in stxr

Will reported that in BPF_XADD we must use a different register in stxr
instruction for the status flag due to otherwise CONSTRAINED UNPREDICTABLE
behavior per architecture. Reference manual says [1]:

  If s == t, then one of the following behaviors must occur:

   * The instruction is UNDEFINED.
   * The instruction executes as a NOP.
   * The instruction performs the store to the specified address, but
     the value stored is UNKNOWN.

Thus, use a different temporary register for the status flag to fix it.

Disassembly extract from test 226/STX_XADD_DW from test_bpf.ko:

  [...]
  0000003c:  c85f7d4b  ldxr x11, [x10]
  00000040:  8b07016b  add x11, x11, x7
  00000044:  c80c7d4b  stxr w12, x11, [x10]
  00000048:  35ffffac  cbnz w12, 0x0000003c
  [...]

  [1] https://static.docs.arm.com/ddi0487/b/DDI0487B_a_armv8_arm.pdf, p.6132

Fixes: 85f68fe89832 ("bpf, arm64: implement jiting of BPF_XADD")
Reported-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: mvpp2: do not bypass the mvpp22_port_mii_set function
Antoine Ténart [Wed, 7 Jun 2017 06:17:50 +0000 (08:17 +0200)]
net: mvpp2: do not bypass the mvpp22_port_mii_set function

The mvpp22_port_mii_set() function was added by 2697582144dd, but the
function directly returns without doing anything. This return was used
when debugging and wasn't removed before sending the patch. Fix this.

Fixes: 2697582144dd ("net: mvpp2: handle misc PPv2.1/PPv2.2 differences")
Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoibmvnic: Return failure on attempted mtu change
John Allen [Tue, 6 Jun 2017 21:55:52 +0000 (16:55 -0500)]
ibmvnic: Return failure on attempted mtu change

Changing the mtu is currently not supported in the ibmvnic driver.

Implement .ndo_change_mtu in the driver so that attempting to use ifconfig
to change the mtu will fail and present the user with an error message.

Signed-off-by: John Allen <jallen@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: fix up hash documentation
Michael S. Tsirkin [Tue, 6 Jun 2017 16:01:37 +0000 (19:01 +0300)]
net: fix up hash documentation

commit 61b905da33 ("net: Rename skb->rxhash to skb->hash")
didn't update the documentation, fix this up.

Cc: Tom Herbert <therbert@google.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobnx2x: fix pf2vf bulletin DMA mapping leak
Michal Schmidt [Tue, 6 Jun 2017 14:30:31 +0000 (16:30 +0200)]
bnx2x: fix pf2vf bulletin DMA mapping leak

When freeing VF's DMA mappings, an already NULLed pointer was checked
again due to an apparent copy&paste error. Consequently, the pf2vf
bulletin DMA mapping was not freed.

Signed-off-by: Michal Schmidt <mschmidt@redhat.com>
Acked-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: don't call strlen on non-terminated string in dev_set_alias()
Alexander Potapenko [Tue, 6 Jun 2017 13:56:54 +0000 (15:56 +0200)]
net: don't call strlen on non-terminated string in dev_set_alias()

KMSAN reported a use of uninitialized memory in dev_set_alias(),
which was caused by calling strlcpy() (which in turn called strlen())
on the user-supplied non-terminated string.

Signed-off-by: Alexander Potapenko <glider@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Tue, 6 Jun 2017 21:30:17 +0000 (14:30 -0700)]
Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) Made TCP congestion control documentation match current reality,
    from Anmol Sarma.

 2) Various build warning and failure fixes from Arnd Bergmann.

 3) Fix SKB list leak in ipv6_gso_segment().

 4) Use after free in ravb driver, from Eugeniu Rosca.

 5) Don't use udp_poll() in ping protocol driver, from Eric Dumazet.

 6) Don't crash in PCI error recovery of cxgb4 driver, from Guilherme
    Piccoli.

 7) _SRC_NAT_DONE_BIT needs to be cleared using atomics, from Liping
    Zhang.

 8) Use after free in vxlan deletion, from Mark Bloch.

 9) Fix ordering of NAPI poll enabled in ethoc driver, from Max
    Filippov.

10) Fix stmmac hangs with TSO, from Niklas Cassel.

11) Fix crash in CALIPSO ipv6, from Richard Haines.

12) Clear nh_flags properly on mpls link up. From Roopa Prabhu.

13) Fix regression in sk_err socket error queue handling, noticed by
    ping applications. From Soheil Hassas Yeganeh.

14) Update mlx4/mlx5 MAINTAINERS information.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (78 commits)
  net: stmmac: fix a broken u32 less than zero check
  net: stmmac: fix completely hung TX when using TSO
  net: ethoc: enable NAPI before poll may be scheduled
  net: bridge: fix a null pointer dereference in br_afspec
  ravb: Fix use-after-free on `ifconfig eth0 down`
  net/ipv6: Fix CALIPSO causing GPF with datagram support
  net: stmmac: ensure jumbo_frm error return is correctly checked for -ve value
  Revert "sit: reload iphdr in ipip6_rcv"
  i40e/i40evf: proper update of the page_offset field
  i40e: Fix state flags for bit set and clean operations of PF
  iwlwifi: fix host command memory leaks
  iwlwifi: fix min API version for 7265D, 3168, 8000 and 8265
  iwlwifi: mvm: clear new beacon command template struct
  iwlwifi: mvm: don't fail when removing a key from an inexisting sta
  iwlwifi: pcie: only use d0i3 in suspend/resume if system_pm is set to d0i3
  iwlwifi: mvm: fix firmware debug restart recording
  iwlwifi: tt: move ucode_loaded check under mutex
  iwlwifi: mvm: support ibss in dqa mode
  iwlwifi: mvm: Fix command queue number on d0i3 flow
  iwlwifi: mvm: rs: start using LQ command color
  ...

7 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
Linus Torvalds [Tue, 6 Jun 2017 21:28:18 +0000 (14:28 -0700)]
Merge git://git./linux/kernel/git/davem/sparc

Pull sparc fixes from David Miller:

 1) Fix TLB context wrap races, from Pavel Tatashin.

 2) Cure some gcc-7 build issues.

 3) Handle invalid setup_hugepagesz command line values properly, from
    Liam R Howlett.

 4) Copy TSB using the correct address shift for the huge TSB, from Mike
    Kravetz.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc64: delete old wrap code
  sparc64: new context wrap
  sparc64: add per-cpu mm of secondary contexts
  sparc64: redefine first version
  sparc64: combine activate_mm and switch_mm
  sparc64: reset mm cpumask after wrap
  sparc/mm/hugepages: Fix setup_hugepagesz for invalid values.
  sparc: Machine description indices can vary
  sparc64: mm: fix copy_tsb to correctly copy huge page TSBs
  arch/sparc: support NR_CPUS = 4096
  sparc64: Add __multi3 for gcc 7.x and later.
  sparc64: Fix build warnings with gcc 7.
  arch/sparc: increase CONFIG_NODES_SHIFT on SPARC64 to 5

7 years agocompiler, clang: suppress warning for unused static inline functions
David Rientjes [Tue, 6 Jun 2017 20:36:24 +0000 (13:36 -0700)]
compiler, clang: suppress warning for unused static inline functions

GCC explicitly does not warn for unused static inline functions for
-Wunused-function.  The manual states:

Warn whenever a static function is declared but not defined or
a non-inline static function is unused.

Clang does warn for static inline functions that are unused.

It turns out that suppressing the warnings avoids potentially complex
#ifdef directives, which also reduces LOC.

Suppress the warning for clang.

Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>