[ 3.5.yuz extended stable ] Patch "netfilter: xt_limit: have r->cost != 0 case work" has been added to staging queue
Herton Ronaldo Krzesinski
herton.krzesinski at canonical.com
Tue Nov 13 20:35:06 UTC 2012
This is a note to let you know that I have just added a patch titled
netfilter: xt_limit: have r->cost != 0 case work
to the linux-3.5.y-queue branch of the 3.5.yuz extended stable tree
which can be found at:
http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue
If you, or anyone else, feels it should not be added to this tree, please
reply to this email.
For more information about the 3.5.yuz tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
Thanks.
-Herton
------
>From c70885cd3a616168f7b7b60a0b037267169a6b49 Mon Sep 17 00:00:00 2001
From: Jan Engelhardt <jengelh at inai.de>
Date: Fri, 21 Sep 2012 22:26:52 +0000
Subject: [PATCH] netfilter: xt_limit: have r->cost != 0 case work
commit 82e6bfe2fbc4d48852114c4f979137cd5bf1d1a8 upstream.
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 at inai.de>
Signed-off-by: Pablo Neira Ayuso <pablo at netfilter.org>
Acked-by: David S. Miller <davem at davemloft.net>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski at canonical.com>
---
net/netfilter/xt_limit.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/net/netfilter/xt_limit.c b/net/netfilter/xt_limit.c
index 5c22ce8..a4c1e45 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);
}
--
1.7.9.5
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