From a454f0ccefbfdbfc0e1aa8a5f8010af5e48b8845 Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Mon, 21 Mar 2011 18:08:28 -0700 Subject: [PATCH] xfrm: Fix initialize repl field of struct xfrm_state Commit 'xfrm: Move IPsec replay detection functions to a separate file' (9fdc4883d92d20842c5acea77a4a21bb1574b495) introduce repl field to struct xfrm_state, and only initialize it under SA's netlink create path, the other path, such as pf_key, ipcomp/ipcomp6 etc, the repl field remaining uninitialize. So if the SA is created by pf_key, any input packet with SA's encryption algorithm will cause panic. int xfrm_input() { ... x->repl->advance(x, seq); ... } This patch fixed it by introduce new function __xfrm_init_state(). Pid: 0, comm: swapper Not tainted 2.6.38-next+ #14 Bochs Bochs EIP: 0060:[] EFLAGS: 00010206 CPU: 0 EIP is at xfrm_input+0x31c/0x4cc EAX: dd839c00 EBX: 00000084 ECX: 00000000 EDX: 01000000 ESI: dd839c00 EDI: de3a0780 EBP: dec1de88 ESP: dec1de64 DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 Process swapper (pid: 0, ti=dec1c000 task=c09c0f20 task.ti=c0992000) Stack: 00000000 00000000 00000002 c0ba27c0 00100000 01000000 de3a0798 c0ba27c0 00000033 dec1de98 c0786848 00000000 de3a0780 dec1dea4 c0786868 00000000 dec1debc c074ee56 e1da6b8c de3a0780 c074ed44 de3a07a8 dec1decc c074ef32 Call Trace: [] xfrm4_rcv_encap+0x22/0x27 [] xfrm4_rcv+0x1b/0x1d [] ip_local_deliver_finish+0x112/0x1b1 [] ? ip_local_deliver_finish+0x0/0x1b1 [] NF_HOOK.clone.1+0x3d/0x44 [] ip_local_deliver+0x3e/0x44 [] ? ip_local_deliver_finish+0x0/0x1b1 [] ip_rcv_finish+0x30a/0x332 [] ? ip_rcv_finish+0x0/0x332 [] NF_HOOK.clone.1+0x3d/0x44 [] ip_rcv+0x20b/0x247 [] ? ip_rcv_finish+0x0/0x332 [] __netif_receive_skb+0x373/0x399 [] netif_receive_skb+0x4b/0x51 [] cp_rx_poll+0x210/0x2c4 [8139cp] [] net_rx_action+0x9a/0x17d [] __do_softirq+0xa1/0x149 [] ? __do_softirq+0x0/0x149 Signed-off-by: Wei Yongjun Signed-off-by: David S. Miller --- include/net/xfrm.h | 1 + net/xfrm/xfrm_state.c | 15 ++++++++++++++- net/xfrm/xfrm_user.c | 2 +- 3 files changed, 16 insertions(+), 2 deletions(-) diff --git a/include/net/xfrm.h b/include/net/xfrm.h index 42a8c32a10e..cffa5dc6644 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -1430,6 +1430,7 @@ extern void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); extern u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); extern int xfrm_init_replay(struct xfrm_state *x); extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); +extern int __xfrm_init_state(struct xfrm_state *x, bool init_replay); extern int xfrm_init_state(struct xfrm_state *x); extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c index d575f053486..f83a3d1da81 100644 --- a/net/xfrm/xfrm_state.c +++ b/net/xfrm/xfrm_state.c @@ -1907,7 +1907,7 @@ int xfrm_state_mtu(struct xfrm_state *x, int mtu) return res; } -int xfrm_init_state(struct xfrm_state *x) +int __xfrm_init_state(struct xfrm_state *x, bool init_replay) { struct xfrm_state_afinfo *afinfo; struct xfrm_mode *inner_mode; @@ -1980,12 +1980,25 @@ int xfrm_init_state(struct xfrm_state *x) if (x->outer_mode == NULL) goto error; + if (init_replay) { + err = xfrm_init_replay(x); + if (err) + goto error; + } + x->km.state = XFRM_STATE_VALID; error: return err; } +EXPORT_SYMBOL(__xfrm_init_state); + +int xfrm_init_state(struct xfrm_state *x) +{ + return __xfrm_init_state(x, true); +} + EXPORT_SYMBOL(xfrm_init_state); int __net_init xfrm_state_init(struct net *net) diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index 706385ae3e4..fc152d28753 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -511,7 +511,7 @@ static struct xfrm_state *xfrm_state_construct(struct net *net, xfrm_mark_get(attrs, &x->mark); - err = xfrm_init_state(x); + err = __xfrm_init_state(x, false); if (err) goto error; -- 2.20.1