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Date: Thu, 7 Nov 2013 17:53:14 +0100 From: Florent Fourcot <florent.fourcot@...t-bretagne.fr> To: netdev@...r.kernel.org Cc: Florent Fourcot <florent.fourcot@...t-bretagne.fr> Subject: [PATCH net-next v2 3/3] ipv6: protect flow label renew against GC Take ip6_fl_lock before to read and update a label. v2: protect only the relevant code Reported-by: Hannes Frederic Sowa <hannes@...essinduktion.org> Signed-off-by: Florent Fourcot <florent.fourcot@...t-bretagne.fr> --- net/ipv6/ip6_flowlabel.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/net/ipv6/ip6_flowlabel.c b/net/ipv6/ip6_flowlabel.c index 5f10b0d..98fdcc6 100644 --- a/net/ipv6/ip6_flowlabel.c +++ b/net/ipv6/ip6_flowlabel.c @@ -345,6 +345,8 @@ static int fl6_renew(struct ip6_flowlabel *fl, unsigned long linger, unsigned lo expires = check_linger(expires); if (!expires) return -EPERM; + + spin_lock_bh(&ip6_fl_lock); fl->lastuse = jiffies; if (time_before(fl->linger, linger)) fl->linger = linger; @@ -352,6 +354,8 @@ static int fl6_renew(struct ip6_flowlabel *fl, unsigned long linger, unsigned lo expires = fl->linger; if (time_before(fl->expires, fl->lastuse + expires)) fl->expires = fl->lastuse + expires; + spin_unlock_bh(&ip6_fl_lock); + return 0; } -- 1.8.4.rc3 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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