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authorHannes Frederic Sowa <hannes@stressinduktion.org>2013-11-08 19:26:21 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-12-08 07:29:24 -0800
commite688cd4d32cfbf0b5198ba95da428038e907e633 (patch)
treee3ac011701376bd11225660db24de5a47753e72a /net/ipv6
parentea136c0d81a94c812dbcf6edc21b6fb3c210b4ca (diff)
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ipv6: protect for_each_sk_fl_rcu in mem_check with rcu_read_lock_bh
[ Upstream commit f8c31c8f80dd882f7eb49276989a4078d33d67a7 ] 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/ipv6')
-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 46e88433ec7..f0ccdb78710 100644
--- a/net/ipv6/ip6_flowlabel.c
+++ b/net/ipv6/ip6_flowlabel.c
@@ -453,8 +453,10 @@ 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 ||