Patch "virtio_net: fix return value check in receive_mergeable()" has been added to the 4.14-stable tree

Patch "virtio_net: fix return value check in receive_mergeable()" has been added to the 4.14-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    virtio_net: fix return value check in receive_mergeable()

to the 4.14-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:
     virtio_net-fix-return-value-check-in-receive_mergeable.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Fri Feb 23 11:45:09 CET 2018
From: Yunjian Wang <wangyunjian@huawei.com>
Date: Mon, 4 Dec 2017 14:02:19 +0800
Subject: virtio_net: fix return value check in receive_mergeable()

From: Yunjian Wang <wangyunjian@huawei.com>


[ Upstream commit 03e9f8a05bce7330bcd9c5cc54c8e42d0fcbf993 ]

The function virtqueue_get_buf_ctx() could return NULL, the return
value 'buf' need to be checked with NULL, not value 'ctx'.

Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/virtio_net.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -714,7 +714,7 @@ static struct sk_buff *receive_mergeable
 		int num_skb_frags;
 
 		buf = virtqueue_get_buf_ctx(rq->vq, &len, &ctx);
-		if (unlikely(!ctx)) {
+		if (unlikely(!buf)) {
 			pr_debug("%s: rx error: %d buffers out of %d missing\n",
 				 dev->name, num_buf,
 				 virtio16_to_cpu(vi->vdev,


Patches currently in stable-queue which might be from wangyunjian@huawei.com are

queue-4.14/virtio_net-fix-return-value-check-in-receive_mergeable.patch