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authorMichael S. Tsirkin <mst@redhat.com>2018-01-26 01:36:31 +0200
committerDavid S. Miller <davem@davemloft.net>2018-01-29 12:02:53 -0500
commit88fae87327a2261cf8db078f6ce4e5a3e55b30b1 (patch)
tree06987686791f41db7e129f796f88839bda3bbeff /Documentation/clearing-warn-once.txt
parenta259df36d1fbf25f0e4f649fdb84e4527e5640ed (diff)
downloadlinux-88fae87327a2261cf8db078f6ce4e5a3e55b30b1.tar.gz
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: 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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