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virtio: make del_vqs idempotent
author
Michael S. Tsirkin
<mst@redhat.com>
Sun, 4 Jan 2015 15:21:58 +0000
(17:21 +0200)
committer
Michael S. Tsirkin
<mst@redhat.com>
Tue, 6 Jan 2015 14:35:35 +0000
(16:35 +0200)
Our code calls del_vqs multiple times, assuming
it's idempotent.
commit
3ec7a77bb3089bb01032fdbd958eb5c29da58b49
virtio_pci: free up vq->priv
broke this assumption, by adding kfree there,
so multiple calls cause double free.
Fix it up.
Fixes:
3ec7a77bb3089bb01032fdbd958eb5c29da58b49
Reported-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
drivers/virtio/virtio_pci_common.c
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diff --git
a/drivers/virtio/virtio_pci_common.c
b/drivers/virtio/virtio_pci_common.c
index
2ef9529
..
5243868
100644
(file)
--- a/
drivers/virtio/virtio_pci_common.c
+++ b/
drivers/virtio/virtio_pci_common.c
@@
-282,6
+282,7
@@
void vp_del_vqs(struct virtio_device *vdev)
vp_free_vectors(vdev);
kfree(vp_dev->vqs);
+ vp_dev->vqs = NULL;
}
static int vp_try_to_find_vqs(struct virtio_device *vdev, unsigned nvqs,