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author | Stefano Garzarella <sgarzare@redhat.com> | 2022-02-22 10:47:42 +0100 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-03-02 11:38:09 +0100 |
commit | 914f93fee61a05b524ed8d8d795fa236d19f4400 (patch) | |
tree | c659b225f342bcef05a4353cd91b1c1580b4705a /arch/parisc | |
parent | 4eec5fe1c680a6c47a9bc0cde00960a4eb663342 (diff) | |
download | linux-stable-914f93fee61a05b524ed8d8d795fa236d19f4400.tar.gz linux-stable-914f93fee61a05b524ed8d8d795fa236d19f4400.tar.bz2 linux-stable-914f93fee61a05b524ed8d8d795fa236d19f4400.zip |
vhost/vsock: don't check owner in vhost_vsock_stop() while releasing
commit a58da53ffd70294ebea8ecd0eb45fd0d74add9f9 upstream.
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: 433fc58e6bf2 ("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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/parisc')
0 files changed, 0 insertions, 0 deletions