tree c662d696e0bfe2ee2be86cbdf0da095d9d6389ba
parent 80b3671e9377916bf2b02e56113fa7377ce5705a
author Toke Høiland-Jørgensen <toke@redhat.com> 1547050182 +0100
committer David S. Miller <davem@davemloft.net> 1547611920 -0800

sched: Avoid dereferencing skb pointer after child enqueue

Parent qdiscs may dereference the pointer to the enqueued skb after
enqueue. However, both CAKE and TBF call consume_skb() on the original skb
when splitting GSO packets, leading to a potential use-after-free in the
parent. Fix this by avoiding dereferencing the skb pointer after enqueueing
to the child.

Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>