diff options
| author | Hannes Frederic Sowa <hannes@stressinduktion.org> | 2013-11-29 06:39:44 +0100 |
|---|---|---|
| committer | Willy Tarreau <w@1wt.eu> | 2014-05-19 07:54:05 +0200 |
| commit | b9e0d1d183da04f802c6e58484e2fce535e3964b (patch) | |
| tree | 36502ba0b7a748393c7954f612234de0a3649c3a /net | |
| parent | 1bbc9e9187f0cff97caaa9b9f85a020092e6ab0b (diff) | |
ipv6: fix possible seqlock deadlock in ip6_finish_output2
[ Upstream commit 7f88c6b23afbd31545c676dea77ba9593a1a14bf ]
IPv6 stats are 64 bits and thus are protected with a seqlock. By not
disabling bottom-half we could deadlock here if we don't disable bh and
a softirq reentrantly updates the same mib.
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv6/ip6_output.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c index bb63ffcd7244..6ff4d07aa209 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -91,8 +91,8 @@ static int ip6_output_finish(struct sk_buff *skb) else if (dst->neighbour) return dst->neighbour->output(skb); - IP6_INC_STATS_BH(dev_net(dst->dev), - ip6_dst_idev(dst), IPSTATS_MIB_OUTNOROUTES); + IP6_INC_STATS(dev_net(dst->dev), + ip6_dst_idev(dst), IPSTATS_MIB_OUTNOROUTES); kfree_skb(skb); return -EINVAL; |