| Date | Tue, 02 Oct 2012 00:53:20 +0200 | From | Willy Tarreau <> | Subject | [ 083/180] netem: fix possible skb leak |
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2.6.32-longterm review patch. If anyone has any objections, please let me know.
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From: Eric Dumazet <edumazet@google.com>
[ Upstream commit 116a0fc31c6c9b8fc821be5a96e5bf0b43260131 ]
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Willy Tarreau <w@1wt.eu> --- net/sched/sch_netem.c | 10 ++++------ 1 files changed, 4 insertions(+), 6 deletions(-)
diff --git a/net/sched/sch_netem.c b/net/sched/sch_netem.c index 2b88295..0ae345a 100644 --- a/net/sched/sch_netem.c +++ b/net/sched/sch_netem.c @@ -199,12 +199,10 @@ static int netem_enqueue(struct sk_buff *skb, struct Qdisc *sch) * do it now in software before we mangle it. */ 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; - } + if (!(skb = skb_unshare(skb, GFP_ATOMIC)) || + (skb->ip_summed == CHECKSUM_PARTIAL && + skb_checksum_help(skb))) + return qdisc_drop(skb, sch); skb->data[net_random() % skb_headlen(skb)] ^= 1<<(net_random() % 8); } -- 1.7.2.1.45.g54fbc
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