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authorPawit Pornkitprasan <p.pawit@gmail.com>2012-11-20 19:27:29 +0700
committerPawit Pornkitprasan <p.pawit@gmail.com>2012-11-20 19:27:29 +0700
commitcc7f0ca4b92d7da9d3a7bd674bfd454cc69e7780 (patch)
tree6ffdbe4122642c18f7dbf3eecd93794d49987dcb /net/ipv4/cipso_ipv4.c
parent67196921fba94cf21b6c2de7da422d536fc9471d (diff)
parent89d2d133c6947c04a8ab539b997f266535beaafe (diff)
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Merge 3.0.52
Merge branch 'linux-3.0.y' of git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable into jellybean-next Conflicts: drivers/net/tun.c kernel/time/timekeeping.c Change-Id: Iba7fc59ca05114d9e7bade8dfc5bb45229ebf075
Diffstat (limited to 'net/ipv4/cipso_ipv4.c')
-rw-r--r--net/ipv4/cipso_ipv4.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/net/ipv4/cipso_ipv4.c b/net/ipv4/cipso_ipv4.c
index 2b3c23c..062876b 100644
--- a/net/ipv4/cipso_ipv4.c
+++ b/net/ipv4/cipso_ipv4.c
@@ -1725,8 +1725,10 @@ int cipso_v4_validate(const struct sk_buff *skb, unsigned char **option)
case CIPSO_V4_TAG_LOCAL:
/* This is a non-standard tag that we only allow for
* local connections, so if the incoming interface is
- * not the loopback device drop the packet. */
- if (!(skb->dev->flags & IFF_LOOPBACK)) {
+ * not the loopback device drop the packet. Further,
+ * there is no legitimate reason for setting this from
+ * userspace so reject it if skb is NULL. */
+ if (skb == NULL || !(skb->dev->flags & IFF_LOOPBACK)) {
err_offset = opt_iter;
goto validate_return_locked;
}