Jason Wang 04a1c4080c vhost: make sure used idx is seen before log in vhost_add_used_n() ...

[ Upstream commit 841df92241 ]

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: 8dd014adfe ("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>

2019-01-13 10:05:28 +01:00

..

Kconfig

vhost: cross-endian support for legacy devices

2015-06-01 15:48:55 +02:00

Makefile

vhost: Make vhost a separate module

2013-07-07 17:33:44 +03:00

net.c

vhost_net: validate sock before trying to put its fd

2018-07-22 14:25:53 +02:00

scsi.c

vhost/scsi: truncate T10 PI iov_iter to prot_bytes

2018-11-21 09:27:42 +01:00

test.c

vhost: move features to core

2015-09-16 12:48:07 +03:00

test.h

vhost test module

2010-12-09 16:00:21 +02:00

vhost.c

vhost: make sure used idx is seen before log in vhost_add_used_n()

2019-01-13 10:05:28 +01:00

vhost.h

vhost: fix performance on LE hosts

2015-10-27 20:17:03 -07:00

vringh.c

vringh: update for virtio 1.0 APIs

2014-12-15 23:49:28 +02:00