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(parent: 814bdf8) | patch
tap: fix use-after-free
authorMichael S. Tsirkin <mst@redhat.com>
Thu, 25 Jan 2018 23:36:31 +0000 (01:36 +0200)
committerDavid S. Miller <davem@davemloft.net>
Mon, 29 Jan 2018 17:02:53 +0000 (12:02 -0500)
commit4126da451bd917166adb449fee197c3e0a938b31
tree06987686791f41db7e129f796f88839bda3bbefftree | snapshot
parent814bdf8cfeaa2d429b3f852347983060dc264aa7commit | diff
tap: fix use-after-free

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: ad40c8cd ("macvtap: switch to use skb array")
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/tap.c diff | blob | history
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