[PATCH 3.11 008/208] ipv6: protect for_each_sk_fl_rcu in mem_check with rcu_read_lock_bh
Luis Henriques
luis.henriques at canonical.com
Thu Dec 19 11:51:46 UTC 2013
3.11.10.2 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Hannes Frederic Sowa <hannes at stressinduktion.org>
commit f8c31c8f80dd882f7eb49276989a4078d33d67a7 upstream.
Fixes a suspicious rcu derference warning.
Cc: Florent Fourcot <florent.fourcot at enst-bretagne.fr>
Signed-off-by: Hannes Frederic Sowa <hannes at stressinduktion.org>
Signed-off-by: David S. Miller <davem at davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
net/ipv6/ip6_flowlabel.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/net/ipv6/ip6_flowlabel.c b/net/ipv6/ip6_flowlabel.c
index 46e8843..f0ccdb7 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 ||
--
1.8.3.2
More information about the kernel-team
mailing list