tap: fix use-after-free

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Lockless access to __ptr_ring_full is only legal if ring is
never resized, otherwise it might cause use-after free errors.
Simply drop the lockless test, we'll drop the packet
a bit later when produce fails.

Fixes: 362899b8 ("macvtap: switch to use skb array")
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Michael S. Tsirkin 2018-01-26 01:36:31 +02:00 • committed by David S. Miller

parent a259df36d1

commit 88fae87327

1 changed files with 0 additions and 3 deletions

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drivers/net/tap.c

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