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| author | Neal Cardwell <ncardwell@google.com> | 2012-11-24 18:54:37 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-11-26 17:24:41 -0500 |
| commit | e1a676424c290b1c8d757e3860170ac7ecd89af4 (patch) | |
| tree | a52a085c1c041bcc2ad7797e7c7526f8eae842ae /net | |
| parent | 81b401100c01d2357031e874689f89bd788d13cd (diff) | |
| download | linux-e1a676424c290b1c8d757e3860170ac7ecd89af4.tar.gz linux-e1a676424c290b1c8d757e3860170ac7ecd89af4.tar.bz2 linux-e1a676424c290b1c8d757e3860170ac7ecd89af4.zip | |
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')
| -rw-r--r-- | net/ipv4/icmp.c | 3 |
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; |