Commit 67ba8786 authored by Xianting Tian's avatar Xianting Tian Committed by Xinghai Cen
Browse files

vhost: correct misleading printing information 

mainline inclusion
from mainline-v6.9-rc4
commit 76f408535aab39c33e0a1dcada9fba5631c65595
bugzilla: https://gitee.com/openeuler/kernel/issues/IAHGCP

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=76f408535aab39c33e0a1dcada9fba5631c65595



-----------------------------------------------------------

Guest moved avail idx not used idx when we need to print log if
'(vq->avail_idx - last_avail_idx) > vq->num', so fix it.

Signed-off-by: default avatarXianting Tian <xianting.tian@linux.alibaba.com>
Message-Id: <20240311082109.46773-1-xianting.tian@linux.alibaba.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: default avatarcaijian <caijian11@h-partners.com>
parent 4d0f562f

drivers/vhost/vhost.c

+1 −1
Original line number Diff line number Diff line
@@ -2583,7 +2583,7 @@ int vhost_get_vq_desc(struct vhost_virtqueue *vq, 
		vq->avail_idx = vhost16_to_cpu(vq, avail_idx);



		if (unlikely((u16)(vq->avail_idx - last_avail_idx) > vq->num)) {

			vq_err(vq, "Guest moved used index from %u to %u",

			vq_err(vq, "Guest moved avail index from %u to %u",

				last_avail_idx, vq->avail_idx);

			return -EFAULT;

		}