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authorHannes Frederic Sowa <hannes@stressinduktion.org>2013-11-08 22:26:21 +0400
committerDavid S. Miller <davem@davemloft.net>2013-11-11 10:25:28 +0400
commitf8c31c8f80dd882f7eb49276989a4078d33d67a7 (patch)
treecbbd640b1bd677ad0ef7d38bc826ac96e0d0633a /net/ipv6/ip6_flowlabel.c
parente267cb960ab790c94a5019272c0e4dac95dc4dba (diff)
downloadlinux-f8c31c8f80dd882f7eb49276989a4078d33d67a7.tar.xz
ipv6: protect for_each_sk_fl_rcu in mem_check with rcu_read_lock_bh
Fixes a suspicious rcu derference warning. Cc: Florent Fourcot <florent.fourcot@enst-bretagne.fr> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ip6_flowlabel.c')
-rw-r--r--net/ipv6/ip6_flowlabel.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/ipv6/ip6_flowlabel.c b/net/ipv6/ip6_flowlabel.c
index 98fdcc6f51b1..e7fb7106550f 100644
--- a/net/ipv6/ip6_flowlabel.c
+++ b/net/ipv6/ip6_flowlabel.c
@@ -457,8 +457,10 @@ static int mem_check(struct sock *sk)
if (room > FL_MAX_SIZE - FL_MAX_PER_SOCK)
return 0;
+ rcu_read_lock_bh();
for_each_sk_fl_rcu(np, sfl)
count++;
+ rcu_read_unlock_bh();
if (room <= 0 ||
((count >= FL_MAX_PER_SOCK ||