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authorAl Viro <viro@zeniv.linux.org.uk>2006-11-30 19:24:49 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2006-12-02 21:31:55 -0800
commit98a0824a0f33d051f31ca8ff59e289755b244ede (patch)
tree5f8ea3519c60809dc880dfb9737d6a5ebcd8dab0
parent40642f95f5f818579bc4cc3ee084b033e662d5b3 (diff)
[EBTABLES]: Deal with the worst-case behaviour in loop checks.
No need to revisit a chain we'd already finished with during the check for current hook. It's either instant loop (which we'd just detected) or a duplicate work. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/bridge/netfilter/ebtables.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c
index 6ab7674ea45..46ab9b75926 100644
--- a/net/bridge/netfilter/ebtables.c
+++ b/net/bridge/netfilter/ebtables.c
@@ -717,7 +717,9 @@ static int check_chainloops(struct ebt_entries *chain, struct ebt_cl_stack *cl_s
BUGPRINT("loop\n");
return -1;
}
- /* this can't be 0, so the above test is correct */
+ if (cl_s[i].hookmask & (1 << hooknr))
+ goto letscontinue;
+ /* this can't be 0, so the loop test is correct */
cl_s[i].cs.n = pos + 1;
pos = 0;
cl_s[i].cs.e = ((void *)e + e->next_offset);