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authorNeal Cardwell <ncardwell@google.com>2012-11-24 22:54:37 +0400
committerDavid S. Miller <davem@davemloft.net>2012-11-27 02:24:41 +0400
commite1a676424c290b1c8d757e3860170ac7ecd89af4 (patch)
treea52a085c1c041bcc2ad7797e7c7526f8eae842ae /net/ipv4/icmp.c
parent81b401100c01d2357031e874689f89bd788d13cd (diff)
downloadlinux-e1a676424c290b1c8d757e3860170ac7ecd89af4.tar.xz
ipv4: avoid passing NULL to inet_putpeer() in icmpv4_xrlim_allow()
inet_getpeer_v4() can return NULL under OOM conditions, and while inet_peer_xrlim_allow() is OK with a NULL peer, inet_putpeer() will crash. This code path now uses the same idiom as the others from: 1d861aa4b3fb08822055345f480850205ffe6170 ("inet: Minimize use of cached route inetpeer."). Signed-off-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/icmp.c')
-rw-r--r--net/ipv4/icmp.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index f2eccd531746..17ff9fd7cdda 100644
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -257,7 +257,8 @@ static inline bool icmpv4_xrlim_allow(struct net *net, struct rtable *rt,
struct inet_peer *peer = inet_getpeer_v4(net->ipv4.peers, fl4->daddr, 1);
rc = inet_peer_xrlim_allow(peer,
net->ipv4.sysctl_icmp_ratelimit);
- inet_putpeer(peer);
+ if (peer)
+ inet_putpeer(peer);
}
out:
return rc;