| From 116a1c5c3f045ee7f444a0416ff72e5bc73d7c04 Mon Sep 17 00:00:00 2001 |
| From: Hannes Frederic Sowa <hannes@stressinduktion.org> |
| Date: Fri, 8 Nov 2013 19:26:21 +0100 |
| Subject: ipv6: protect for_each_sk_fl_rcu in mem_check with rcu_read_lock_bh |
| |
| From: Hannes Frederic Sowa <hannes@stressinduktion.org> |
| |
| [ 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> |
| --- |
| net/ipv6/ip6_flowlabel.c | 2 ++ |
| 1 file changed, 2 insertions(+) |
| |
| --- 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 || |