Jason Wang 2510d91bda 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>

2019-01-09 17:14:45 +01:00

..

Kconfig

tap: tap as an independent module

2017-02-11 20:59:41 -05:00

Kconfig.vringh

…

Makefile

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

net.c

vhost_net: validate sock before trying to put its fd

2018-07-22 14:28:47 +02:00

scsi.c

vhost/scsi: truncate T10 PI iov_iter to prot_bytes

2018-11-21 09:24:08 +01:00

test.c

…

test.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

vhost.c

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

2019-01-09 17:14:45 +01:00

vhost.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

vringh.c

vringh: kill off ACCESS_ONCE()

2016-12-16 00:13:36 +02:00

vsock.c

vhost/vsock: fix reset orphans race with close timeout

2018-12-21 14:13:17 +01:00