Jason Wang bd3ccdc6f9 vhost: use mutex_lock_nested() in vhost_dev_lock_vqs() ...

commit e9cb4239134c860e5f92c75bf5321bd377bb505b upstream.

We used to call mutex_lock() in vhost_dev_lock_vqs() which tries to
hold mutexes of all virtqueues. This may confuse lockdep to report a
possible deadlock because of trying to hold locks belong to same
class. Switch to use mutex_lock_nested() to avoid false positive.

Fixes: 6b1e6cc785 ("vhost: new device IOTLB API")
Reported-by: syzbot+dbb7c1161485e61b0241@syzkaller.appspotmail.com
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2018-02-25 11:05:39 +01:00

..

Kconfig

vhost: split out vringh Kconfig

2016-08-02 16:54:28 +03:00

Kconfig.vringh

vhost: split out vringh Kconfig

2016-08-02 16:54:28 +03:00

Makefile

VSOCK: Add Makefile and Kconfig

2016-08-02 02:57:30 +03:00

net.c

vhost_net: stop device during reset owner

2018-02-13 12:35:56 +01:00

scsi.c

fix a page leak in vhost_scsi_iov_to_sgl() error recovery

2017-11-30 08:39:05 +00:00

test.c

Merge 4.8-rc5 into char-misc-next

2016-09-05 08:04:07 +02:00

test.h

…

vhost.c

vhost: use mutex_lock_nested() in vhost_dev_lock_vqs()

2018-02-25 11:05:39 +01:00

vhost.h

vhost: new device IOTLB API

2016-08-02 16:53:54 +03:00

vringh.c

vringh: update for virtio 1.0 APIs

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

vsock.c

vhost-vsock: add pkt cancel capability

2017-12-25 14:23:37 +01:00