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authorJan Engelhardt <jengelh@inai.de>2012-09-22 02:26:52 +0400
committerPablo Neira Ayuso <pablo@netfilter.org>2012-09-26 03:33:16 +0400
commit82e6bfe2fbc4d48852114c4f979137cd5bf1d1a8 (patch)
tree97fd3c06795902c807a381c0bef3bc2e9bfd2966
parent3e10986d1d698140747fcfc2761ec9cb64c1d582 (diff)
downloadlinux-82e6bfe2fbc4d48852114c4f979137cd5bf1d1a8.tar.xz
netfilter: xt_limit: have r->cost != 0 case work
Commit v2.6.19-rc1~1272^2~41 tells us that r->cost != 0 can happen when a running state is saved to userspace and then reinstated from there. Make sure that private xt_limit area is initialized with correct values. Otherwise, random matchings due to use of uninitialized memory. Signed-off-by: Jan Engelhardt <jengelh@inai.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
-rw-r--r--net/netfilter/xt_limit.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/net/netfilter/xt_limit.c b/net/netfilter/xt_limit.c
index 5c22ce8ab309..a4c1e4528cac 100644
--- a/net/netfilter/xt_limit.c
+++ b/net/netfilter/xt_limit.c
@@ -117,11 +117,11 @@ static int limit_mt_check(const struct xt_mtchk_param *par)
/* For SMP, we only want to use one set of state. */
r->master = priv;
+ /* User avg in seconds * XT_LIMIT_SCALE: convert to jiffies *
+ 128. */
+ priv->prev = jiffies;
+ priv->credit = user2credits(r->avg * r->burst); /* Credits full. */
if (r->cost == 0) {
- /* User avg in seconds * XT_LIMIT_SCALE: convert to jiffies *
- 128. */
- priv->prev = jiffies;
- priv->credit = user2credits(r->avg * r->burst); /* Credits full. */
r->credit_cap = priv->credit; /* Credits full. */
r->cost = user2credits(r->avg);
}