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dataplane: do not free VirtQueueElement in vring_push()

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VirtQueueElement is allocated in vring_pop() so it seems to make sense
that vring_push() should free it.  Alas, virtio-blk frees
VirtQueueElement itself in virtio_blk_free_request().

This patch solves a double-free assertion in glib's g_slice_free().

Rename vring_free_element() to vring_unmap_element() since it no longer
frees the VirtQueueElement.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2014-07-09 10:05:47 +02:00 • committed by Kevin Wolf
parent 0a21ea3289
commit abd764250f
2 changed files with 4 additions and 6 deletions
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include/hw/virtio/dataplane/vring.h
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@ -55,6 +55,5 @@ bool vring_enable_notification(VirtIODevice *vdev, Vring *vring);
bool vring_should_notify(VirtIODevice *vdev, Vring *vring);
int vring_pop(VirtIODevice *vdev, Vring *vring, VirtQueueElement **elem);
void vring_push(Vring *vring, VirtQueueElement *elem, int len);
void vring_free_element(VirtQueueElement *elem);
#endif /* VRING_H */