linux/drivers/vhost
Stefano Garzarella a58da53ffd vhost/vsock: don't check owner in vhost_vsock_stop() while releasing
vhost_vsock_stop() calls vhost_dev_check_owner() to check the device
ownership. It expects current->mm to be valid.

vhost_vsock_stop() is also called by vhost_vsock_dev_release() when
the user has not done close(), so when we are in do_exit(). In this
case current->mm is invalid and we're releasing the device, so we
should clean it anyway.

Let's check the owner only when vhost_vsock_stop() is called
by an ioctl.

When invoked from release we can not fail so we don't check return
code of vhost_vsock_stop(). We need to stop vsock even if it's not
the owner.

Fixes: 433fc58e6b ("VSOCK: Introduce vhost_vsock.ko")
Cc: stable@vger.kernel.org
Reported-by: syzbot+1e3ea63db39f2b4440e0@syzkaller.appspotmail.com
Reported-and-tested-by: syzbot+3140b17cb44a7b174008@syzkaller.appspotmail.com
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2022-02-23 12:32:33 +00:00
..
iotlb.c vhost-iotlb: Add an opaque pointer for vhost IOTLB 2021-09-06 07:20:57 -04:00
Kconfig vhost_vdpa: implement IRQ offloading in vhost_vdpa 2020-08-05 11:08:42 -04:00
Makefile vhost: introduce vDPA-based backend 2020-04-02 10:41:40 -04:00
net.c vhost_net: fix OoB on sendmsg() failure. 2021-09-09 10:52:12 +01:00
scsi.c vhost scsi: Convert to SPDX identifier 2021-09-05 16:23:08 -04:00
test.c vhost/test: fix memory leak of vhost virtqueues 2022-01-14 18:50:53 -05:00
test.h tools/virtio: Add --reset 2020-06-22 12:34:21 -04:00
vdpa.c vdpa: Protect vdpa reset with cf_mutex 2022-01-14 18:50:54 -05:00
vhost.c vhost: Fix the calculation in vhost_overflow() 2021-08-11 06:44:15 -04:00
vhost.h vhost: fix up vhost_work coding style 2021-07-03 04:50:55 -04:00
vringh.c vringh: Use wiov->used to check for read/write desc order 2021-08-11 06:44:24 -04:00
vsock.c vhost/vsock: don't check owner in vhost_vsock_stop() while releasing 2022-02-23 12:32:33 +00:00