Jason Wang 1b15ad683a vhost: synchronize IOTLB message with dev cleanup ... DaeRyong Jeong reports a race between vhost_dev_cleanup() and vhost_process_iotlb_msg(): Thread interleaving: CPU0 (vhost_process_iotlb_msg) CPU1 (vhost_dev_cleanup) (In the case of both VHOST_IOTLB_UPDATE and VHOST_IOTLB_INVALIDATE) ===== ===== vhost_umem_clean(dev->iotlb); if (!dev->iotlb) { ret = -EFAULT; break; } dev->iotlb = NULL; The reason is we don't synchronize between them, fixing by protecting vhost_process_iotlb_msg() with dev mutex. Reported-by: DaeRyong Jeong <threeearcat@gmail.com> Fixes: 6b1e6cc785 ("vhost: new device IOTLB API") Signed-off-by: Jason Wang <jasowang@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2018-05-24 22:09:51 -04:00
..
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: set packet weight of tx polling to 2 * vq size	2018-04-09 11:01:37 -04:00
scsi.c	vhost: remove unused lock check flag in vhost_dev_cleanup()	2018-02-01 16:26:44 +02:00
test.c	vhost: remove unused lock check flag in vhost_dev_cleanup()	2018-02-01 16:26:44 +02:00
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: synchronize IOTLB message with dev cleanup	2018-05-24 22:09:51 -04:00
vhost.h	vhost: return bool from *_access_ok() functions	2018-04-11 10:54:06 -04:00
vringh.c
vsock.c	fw_cfg, vhost: features fixes	2018-04-06 19:21:41 -07:00