projects / linux.git / commit
? search:
summary | shortlog | log | commit | commitdiff | tree
(parent: a259df3) | 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)
commit88fae87327a2261cf8db078f6ce4e5a3e55b30b1
tree06987686791f41db7e129f796f88839bda3bbefftree | snapshot
parenta259df36d1fbf25f0e4f649fdb84e4527e5640edcommit | 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: 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>
drivers/net/tap.c diff | blob | history