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xen/xenbus: Don't leak memory when unmapping the ring on HVM backend
The commit ccc9d90a9a
"xenbus_client:
Extend interface to support multi-page ring" removes the call to
free_xenballooned_pages() in xenbus_unmap_ring_vfree_hvm(), leaking a
page for every shared ring.
Only with backends running in HVM domains were affected.
Signed-off-by: Julien Grall <julien.grall@citrix.com>
Cc: <stable@vger.kernel.org>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
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parent
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1 changed files with 3 additions and 1 deletions
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@ -814,8 +814,10 @@ static int xenbus_unmap_ring_vfree_hvm(struct xenbus_device *dev, void *vaddr)
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rv = xenbus_unmap_ring(dev, node->handles, node->nr_handles,
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addrs);
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if (!rv)
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if (!rv) {
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vunmap(vaddr);
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free_xenballooned_pages(node->nr_handles, node->hvm.pages);
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}
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else
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WARN(1, "Leaking %p, size %u page(s)\n", vaddr,
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node->nr_handles);
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