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| author | Wei Yongjun <yjwei@cn.fujitsu.com> | 2011-03-21 18:08:28 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-03-21 18:08:28 -0700 |
| commit | a454f0ccefbfdbfc0e1aa8a5f8010af5e48b8845 (patch) | |
| tree | 359fdf6dbff1494ffe3d5cc8861fb0c0b72cc831 /net/xfrm/xfrm_state.c | |
| parent | 0e24d34a5b95226cfc335817aefd9cf9744e5659 (diff) | |
| download | lwn-a454f0ccefbfdbfc0e1aa8a5f8010af5e48b8845.tar.gz lwn-a454f0ccefbfdbfc0e1aa8a5f8010af5e48b8845.zip | |
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:[<c078e5d5>] 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:
[<c0786848>] xfrm4_rcv_encap+0x22/0x27
[<c0786868>] xfrm4_rcv+0x1b/0x1d
[<c074ee56>] ip_local_deliver_finish+0x112/0x1b1
[<c074ed44>] ? ip_local_deliver_finish+0x0/0x1b1
[<c074ef32>] NF_HOOK.clone.1+0x3d/0x44
[<c074ef77>] ip_local_deliver+0x3e/0x44
[<c074ed44>] ? ip_local_deliver_finish+0x0/0x1b1
[<c074ec03>] ip_rcv_finish+0x30a/0x332
[<c074e8f9>] ? ip_rcv_finish+0x0/0x332
[<c074ef32>] NF_HOOK.clone.1+0x3d/0x44
[<c074f188>] ip_rcv+0x20b/0x247
[<c074e8f9>] ? ip_rcv_finish+0x0/0x332
[<c072797d>] __netif_receive_skb+0x373/0x399
[<c0727bc1>] netif_receive_skb+0x4b/0x51
[<e0817e2a>] cp_rx_poll+0x210/0x2c4 [8139cp]
[<c072818f>] net_rx_action+0x9a/0x17d
[<c0445b5c>] __do_softirq+0xa1/0x149
[<c0445abb>] ? __do_softirq+0x0/0x149
Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/xfrm/xfrm_state.c')
| -rw-r--r-- | net/xfrm/xfrm_state.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c index d575f0534868..f83a3d1da81b 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) |