This is a note to let you know that I've just added the patch titled
vduse: Temporarily fail if control queue feature requested
to the 6.6-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:
vduse-temporarily-fail-if-control-queue-feature-requ.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 36b3092a0a36bfd562cf412967297e6080ac0f3d
Author: Maxime Coquelin <maxime.coquelin@xxxxxxxxxx>
Date: Tue Jan 9 12:10:24 2024 +0100
vduse: Temporarily fail if control queue feature requested
[ Upstream commit 56e71885b0349241c07631a7b979b61e81afab6a ]
Virtio-net driver control queue implementation is not safe
when used with VDUSE. If the VDUSE application does not
reply to control queue messages, it currently ends up
hanging the kernel thread sending this command.
Some work is on-going to make the control queue
implementation robust with VDUSE. Until it is completed,
let's fail features check if control-queue feature is
requested.
Signed-off-by: Maxime Coquelin <maxime.coquelin@xxxxxxxxxx>
Message-Id: <20240109111025.1320976-3-maxime.coquelin@xxxxxxxxxx>
Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
Acked-by: Eugenio Pérez <eperezma@xxxxxxxxxx>
Reviewed-by: Xie Yongji <xieyongji@xxxxxxxxxxxxx>
Acked-by: Jason Wang <jasowang@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c
index d91fe7e0733b6..d7bda179ef79f 100644
--- a/drivers/vdpa/vdpa_user/vduse_dev.c
+++ b/drivers/vdpa/vdpa_user/vduse_dev.c
@@ -8,6 +8,7 @@
*
*/
+#include "linux/virtio_net.h"
#include <linux/init.h>
#include <linux/module.h>
#include <linux/cdev.h>
@@ -28,6 +29,7 @@
#include <uapi/linux/virtio_config.h>
#include <uapi/linux/virtio_ids.h>
#include <uapi/linux/virtio_blk.h>
+#include <uapi/linux/virtio_ring.h>
#include <linux/mod_devicetable.h>
#include "iova_domain.h"
@@ -1671,6 +1673,9 @@ static bool features_is_valid(struct vduse_dev_config *config)
if ((config->device_id == VIRTIO_ID_BLOCK) &&
(config->features & BIT_ULL(VIRTIO_BLK_F_CONFIG_WCE)))
return false;
+ else if ((config->device_id == VIRTIO_ID_NET) &&
+ (config->features & BIT_ULL(VIRTIO_NET_F_CTRL_VQ)))
+ return false;
return true;
}
