This is a note to let you know that I've just added the patch titled tools/virtio: initialize spinlocks in vring_test.c to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: tools-virtio-initialize-spinlocks-in-vring_test.c.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 0d034da6985701b8c18bab6423107889772a3910 Author: Ricardo Cañuelo <ricardo.canuelo@xxxxxxxxxxxxx> Date: Wed Oct 12 08:29:49 2022 +0200 tools/virtio: initialize spinlocks in vring_test.c [ Upstream commit c262f75cb6bb5a63828e72ce3b8fe808e5029479 ] The virtio_device vqs_list spinlocks must be initialized before use to prevent functions that manipulate the device virtualqueues, such as vring_new_virtqueue(), from blocking indefinitely. Signed-off-by: Ricardo Cañuelo <ricardo.canuelo@xxxxxxxxxxxxx> Message-Id: <20221012062949.1526176-1-ricardo.canuelo@xxxxxxxxxxxxx> Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx> Reviewed-by: Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/tools/virtio/vringh_test.c b/tools/virtio/vringh_test.c index fa87b58bd5fa..98ff808d6f0c 100644 --- a/tools/virtio/vringh_test.c +++ b/tools/virtio/vringh_test.c @@ -308,6 +308,7 @@ static int parallel_test(u64 features, gvdev.vdev.features = features; INIT_LIST_HEAD(&gvdev.vdev.vqs); + spin_lock_init(&gvdev.vdev.vqs_list_lock); gvdev.to_host_fd = to_host[1]; gvdev.notifies = 0; @@ -455,6 +456,7 @@ int main(int argc, char *argv[]) getrange = getrange_iov; vdev.features = 0; INIT_LIST_HEAD(&vdev.vqs); + spin_lock_init(&vdev.vqs_list_lock); while (argv[1]) { if (strcmp(argv[1], "--indirect") == 0)