On Wed, Mar 14, 2018 at 6:48 PM Eric Dumazet <eduma...@google.com> wrote:

> syzbot reported one use-after-free in pfifo_fast_enqueue() [1]

> Issue here is that we can not reuse skb after a successful
skb_array_produce()
> since another cpu might have consumed it already.

> I believe a similar problem exists in try_bulk_dequeue_skb_slow()
> in case we put an skb into qdisc_enqueue_skb_bad_txq() for lockless qdisc.

> [1]
> ==================================================================


I sent a V2 without  this ====== line that is fooling patchwork, sorry for
the noise.

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