From: Vasily Kulikov <segoon@openwall.com>
To: "David S. Miller" <davem@davemloft.net>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,
James Morris <jmorris@namei.org>,
Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>,
Patrick McHardy <kaber@trash.net>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] ip: fix error handling in ip_finish_output2()
Date: Mon, 6 Aug 2012 17:55:29 +0400 [thread overview]
Message-ID: <20120806135529.GA30699@albatros> (raw)
__neigh_create() returns either a pointer to struct neighbour or PTR_ERR().
But the caller expects it to return either a pointer or NULL. Replace
the NULL check with IS_ERR() check.
The bug was introduced in a263b3093641fb1ec377582c90986a7fd0625184.
Signed-off-by: Vasily Kulikov <segoon@openwall.com>
---
Compile tested only.
net/ipv4/ip_output.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index ba39a52..76dde25 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -197,7 +197,7 @@ static inline int ip_finish_output2(struct sk_buff *skb)
neigh = __ipv4_neigh_lookup_noref(dev, nexthop);
if (unlikely(!neigh))
neigh = __neigh_create(&arp_tbl, &nexthop, dev, false);
- if (neigh) {
+ if (!IS_ERR(neigh)) {
int res = dst_neigh_output(dst, neigh, skb);
rcu_read_unlock_bh();
--
1.7.0.4
next reply other threads:[~2012-08-06 13:55 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-06 13:55 Vasily Kulikov [this message]
2012-08-06 20:32 ` [PATCH] ip: fix error handling in ip_finish_output2() David Miller
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