| From | Paul Gortmaker <> | Subject | [v2.6.34-stable 051/213] netem: fix possible skb leak | Date | Wed, 5 Feb 2014 15:00:06 -0500 |
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From: Eric Dumazet <edumazet@google.com>
------------------- This is a commit scheduled for the next v2.6.34 longterm release. http://git.kernel.org/?p=linux/kernel/git/paulg/longterm-queue-2.6.34.git If you see a problem with using this for longterm, please comment. -------------------
commit 116a0fc31c6c9b8fc821be5a96e5bf0b43260131 upstream.
skb_checksum_help(skb) can return an error, we must free skb in this case. qdisc_drop(skb, sch) can also be feeded with a NULL skb (if skb_unshare() failed), so lets use this generic helper.
Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> --- net/sched/sch_netem.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/net/sched/sch_netem.c b/net/sched/sch_netem.c index 4714ff162bbd..e105245dac93 100644 --- a/net/sched/sch_netem.c +++ b/net/sched/sch_netem.c @@ -202,10 +202,8 @@ static int netem_enqueue(struct sk_buff *skb, struct Qdisc *sch) if (q->corrupt && q->corrupt >= get_crandom(&q->corrupt_cor)) { if (!(skb = skb_unshare(skb, GFP_ATOMIC)) || (skb->ip_summed == CHECKSUM_PARTIAL && - skb_checksum_help(skb))) { - sch->qstats.drops++; - return NET_XMIT_DROP; - } + skb_checksum_help(skb))) + return qdisc_drop(skb, sch); skb->data[net_random() % skb_headlen(skb)] ^= 1<<(net_random() % 8); } -- 1.8.5.2
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