summaryrefslogtreecommitdiff
path: root/net/xfrm
diff options
context:
space:
mode:
authorPatrick McHardy <kaber@trash.net>2006-02-22 00:37:35 +0300
committerDavid S. Miller <davem@sunset.davemloft.net>2006-02-24 03:10:51 +0300
commit42cf93cd464e0df3c85d298c647411bae6d99e6e (patch)
treef68f155f6eedbac8ac8c32c8c947d5a2f6cb2033 /net/xfrm
parenta80614d1adba903a1e5cb22bf14ebc640fc2ba4c (diff)
downloadlinux-42cf93cd464e0df3c85d298c647411bae6d99e6e.tar.xz
[NETFILTER]: Fix bridge netfilter related in xfrm_lookup
The bridge-netfilter code attaches a fake dst_entry with dst->ops == NULL to purely bridged packets. When these packets are SNATed and a policy lookup is done, xfrm_lookup crashes because it tries to dereference dst->ops. Change xfrm_lookup not to dereference dst->ops before checking for the DST_NOXFRM flag and set this flag in the fake dst_entry. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/xfrm')
-rw-r--r--net/xfrm/xfrm_policy.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 5e6b05ac1260..8206025d8e46 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -782,7 +782,7 @@ int xfrm_lookup(struct dst_entry **dst_p, struct flowi *fl,
int nx = 0;
int err;
u32 genid;
- u16 family = dst_orig->ops->family;
+ u16 family;
u8 dir = policy_to_flow_dir(XFRM_POLICY_OUT);
u32 sk_sid = security_sk_sid(sk, fl, dir);
restart:
@@ -796,13 +796,14 @@ restart:
if ((dst_orig->flags & DST_NOXFRM) || !xfrm_policy_list[XFRM_POLICY_OUT])
return 0;
- policy = flow_cache_lookup(fl, sk_sid, family, dir,
- xfrm_policy_lookup);
+ policy = flow_cache_lookup(fl, sk_sid, dst_orig->ops->family,
+ dir, xfrm_policy_lookup);
}
if (!policy)
return 0;
+ family = dst_orig->ops->family;
policy->curlft.use_time = (unsigned long)xtime.tv_sec;
switch (policy->action) {