Commit 206cc445 authored by Sami Uddin's avatar Sami Uddin Committed by Michael S. Tsirkin
Browse files

virtio: reject shm region if length is zero 



Prevent usage of shared memory regions where the length is zero,
as such configurations are not valid and may lead to unexpected behavior.

Signed-off-by: default avatarSami Uddin <sami.md.ko@gmail.com>
Message-Id: <20250511222153.2332-1-sami.md.ko@gmail.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent 9d4f22fd

include/linux/virtio_config.h

+2 −0
Original line number Diff line number Diff line
@@ -329,6 +329,8 @@ static inline 
bool virtio_get_shm_region(struct virtio_device *vdev,

			   struct virtio_shm_region *region, u8 id)

{

	if (!region->len)

		return false;

	if (!vdev->config->get_shm_region)

		return false;

	return vdev->config->get_shm_region(vdev, region, id);