[PATCH] netfilter: Don't leak 'exp' in ctnetlink_create_expect()

Subsystems: netfilter, networking [general], the rest

STALE4999d

2 messages, 2 authors, 2012-12-26 · open the first message on its own page

[PATCH] netfilter: Don't leak 'exp' in ctnetlink_create_expect()

From: Jesper Juhl <hidden>
Date: 2012-12-26 21:49:45

'if ((!help) && (!cda[CTA_EXPECT_TIMEOUT]))' then we should remember
to free 'exp' that was allocated by 'nf_ct_expect_alloc()' by jumping
to the 'err_out' label rather than the 'out' label in
ctnetlink_create_expect().
This patch should get rid of the leak.

Signed-off-by: Jesper Juhl <redacted>
---
 net/netfilter/nf_conntrack_netlink.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

 note: compile tested only.
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index 4e078cd..627b0e5 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -2624,7 +2624,7 @@ ctnetlink_create_expect(struct net *net, u16 zone,
 	if (!help) {
 		if (!cda[CTA_EXPECT_TIMEOUT]) {
 			err = -EINVAL;
-			goto out;
+			goto err_out;
 		}
 		exp->timeout.expires =
 		  jiffies + ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ;
-- 
1.7.1


-- 
Jesper Juhl <jj@chaosbits.net>       http://www.chaosbits.net/
Don't top-post http://www.catb.org/jargon/html/T/top-post.html
Plain text mails only, please.

Re: [PATCH] netfilter: Don't leak 'exp' in ctnetlink_create_expect()

From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: 2012-12-26 22:09:11

On Wed, Dec 26, 2012 at 10:49:40PM +0100, Jesper Juhl wrote:
'if ((!help) && (!cda[CTA_EXPECT_TIMEOUT]))' then we should remember
to free 'exp' that was allocated by 'nf_ct_expect_alloc()' by jumping
to the 'err_out' label rather than the 'out' label in
ctnetlink_create_expect().
This patch should get rid of the leak.
Applied, thanks Jesper.
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