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| author | Jason Wang <jasowang@redhat.com> | 2018-12-13 10:53:37 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-13 10:05:28 +0100 |
| commit | 04a1c4080cbfade5b445e15d0e64dc98e32fe484 (patch) | |
| tree | bee51d589ad2d50e7fb42311e37cb20870c1c30a /net/core/sock.c | |
| parent | 15c17f3654f74b4772a0a4813cf3b975d12a321c (diff) | |
vhost: make sure used idx is seen before log in vhost_add_used_n()
[ Upstream commit 841df922417eb82c835e93d4b93eb6a68c99d599 ]
We miss a write barrier that guarantees used idx is updated and seen
before log. This will let userspace sync and copy used ring before
used idx is update. Fix this by adding a barrier before log_write().
Fixes: 8dd014adfea6f ("vhost-net: mergeable buffers support")
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/core/sock.c')
0 files changed, 0 insertions, 0 deletions