tree 43bdf27e23afef2d4c07e184372a979c3910ef7d
parent 1e4b044d22517cae7047c99038abb444423243ca
author Alexey Khoroshilov <khoroshilov@ispras.ru> 1530910206 +0300
committer Alex Williamson <alex.williamson@redhat.com> 1531336961 -0600

sample: vfio-mdev: avoid deadlock in mdev_access()

mdev_access() calls mbochs_get_page() with mdev_state->ops_lock held,
while mbochs_get_page() locks the mutex by itself.
It leads to unavoidable deadlock.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>