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| author | Ingo Molnar <mingo@elte.hu> | 2006-04-28 15:32:29 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-04-29 18:33:21 -0700 |
| commit | e959d8121fcbfee6ec049cc617e9423d1799f2e4 (patch) | |
| tree | 5bbb925d554c1c0c29ce36cb9a771a12bf403861 /net | |
| parent | f3111502c065d32dcb021f55e30398aaebd8fb0f (diff) | |
| download | linux-e959d8121fcbfee6ec049cc617e9423d1799f2e4.tar.gz linux-e959d8121fcbfee6ec049cc617e9423d1799f2e4.tar.bz2 linux-e959d8121fcbfee6ec049cc617e9423d1799f2e4.zip | |
[XFRM]: fix incorrect xfrm_policy_afinfo_lock use
xfrm_policy_afinfo_lock can be taken in bh context, at:
[<c013fe1a>] lockdep_acquire_read+0x54/0x6d
[<c0f6e024>] _read_lock+0x15/0x22
[<c0e8fcdb>] xfrm_policy_get_afinfo+0x1a/0x3d
[<c0e8fd10>] xfrm_decode_session+0x12/0x32
[<c0e66094>] ip_route_me_harder+0x1c9/0x25b
[<c0e770d3>] ip_nat_local_fn+0x94/0xad
[<c0e2bbc8>] nf_iterate+0x2e/0x7a
[<c0e2bc50>] nf_hook_slow+0x3c/0x9e
[<c0e3a342>] ip_push_pending_frames+0x2de/0x3a7
[<c0e53e19>] icmp_push_reply+0x136/0x141
[<c0e543fb>] icmp_reply+0x118/0x1a0
[<c0e54581>] icmp_echo+0x44/0x46
[<c0e53fad>] icmp_rcv+0x111/0x138
[<c0e36764>] ip_local_deliver+0x150/0x1f9
[<c0e36be2>] ip_rcv+0x3d5/0x413
[<c0df760f>] netif_receive_skb+0x337/0x356
[<c0df76c3>] process_backlog+0x95/0x110
[<c0df5fe2>] net_rx_action+0xa5/0x16d
[<c012d8a7>] __do_softirq+0x6f/0xe6
[<c0105ec2>] do_softirq+0x52/0xb1
this means that all write-locking of xfrm_policy_afinfo_lock must be
bh-safe. This patch fixes xfrm_policy_register_afinfo() and
xfrm_policy_unregister_afinfo().
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/xfrm/xfrm_policy.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c index e5b0afc94f1e..b469c8b54613 100644 --- a/net/xfrm/xfrm_policy.c +++ b/net/xfrm/xfrm_policy.c @@ -1251,7 +1251,7 @@ int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo) return -EINVAL; if (unlikely(afinfo->family >= NPROTO)) return -EAFNOSUPPORT; - write_lock(&xfrm_policy_afinfo_lock); + write_lock_bh(&xfrm_policy_afinfo_lock); if (unlikely(xfrm_policy_afinfo[afinfo->family] != NULL)) err = -ENOBUFS; else { @@ -1268,7 +1268,7 @@ int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo) afinfo->garbage_collect = __xfrm_garbage_collect; xfrm_policy_afinfo[afinfo->family] = afinfo; } - write_unlock(&xfrm_policy_afinfo_lock); + write_unlock_bh(&xfrm_policy_afinfo_lock); return err; } EXPORT_SYMBOL(xfrm_policy_register_afinfo); @@ -1280,7 +1280,7 @@ int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo) return -EINVAL; if (unlikely(afinfo->family >= NPROTO)) return -EAFNOSUPPORT; - write_lock(&xfrm_policy_afinfo_lock); + write_lock_bh(&xfrm_policy_afinfo_lock); if (likely(xfrm_policy_afinfo[afinfo->family] != NULL)) { if (unlikely(xfrm_policy_afinfo[afinfo->family] != afinfo)) err = -EINVAL; @@ -1294,7 +1294,7 @@ int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo) afinfo->garbage_collect = NULL; } } - write_unlock(&xfrm_policy_afinfo_lock); + write_unlock_bh(&xfrm_policy_afinfo_lock); return err; } EXPORT_SYMBOL(xfrm_policy_unregister_afinfo); |