From: "Michael S. Tsirkin" <mst@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: Sasha Levin <sasha.levin@oracle.com>,
Rusty Russell <rusty@rustcorp.com.au>,
virtualization@lists.linux-foundation.org
Subject: [PATCH] virtio: make del_vqs idempotent
Date: Sun, 4 Jan 2015 17:25:18 +0200 [thread overview]
Message-ID: <1420385102-6637-1-git-send-email-mst@redhat.com> (raw)
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 | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/virtio/virtio_pci_common.c b/drivers/virtio/virtio_pci_common.c
index 08d0b04..557cbcb 100644
--- 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,
--
MST
reply other threads:[~2015-01-04 15:25 UTC|newest]
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