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vhost: Fix element in vhost_svq_add failure 

Coverity rightly reports that is not free in that case.

Fixes: Coverity CID 1487559
Fixes: 100890f7ca ("vhost: Shadow virtqueue buffers forwarding")

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Message-Id: <20220512175747.142058-7-eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Eugenio Pérez 2022-05-12 19:57:47 +02:00 committed by Michael S. Tsirkin
parent d792199de5
commit 5181db132b
1 changed files with 8 additions and 0 deletions

8
hw/virtio/vhost-shadow-virtqueue.c
View File

@ -199,11 +199,19 @@ static bool vhost_svq_add_split(VhostShadowVirtqueue *svq,
return true; return true;
} }
/**
* Add an element to a SVQ.
*
* The caller must check that there is enough slots for the new element. It
* takes ownership of the element: In case of failure, it is free and the SVQ
* is considered broken.
*/
static bool vhost_svq_add(VhostShadowVirtqueue *svq, VirtQueueElement *elem) static bool vhost_svq_add(VhostShadowVirtqueue *svq, VirtQueueElement *elem)
{ {
unsigned qemu_head; unsigned qemu_head;
bool ok = vhost_svq_add_split(svq, elem, &qemu_head); bool ok = vhost_svq_add_split(svq, elem, &qemu_head);
if (unlikely(!ok)) { if (unlikely(!ok)) {
g_free(elem);
return false; return false;
} }