4.1-stable review patch. If anyone has any objections, please let me know.
------------------ From: Julien Grall <[email protected]> commit c22fe519e7e2b94ad173e0ea3b89c1a7d8be8d00 upstream. The commit ccc9d90a9a8b5c4ad7e9708ec41f75ff9e98d61d "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 <[email protected]> Reviewed-by: Boris Ostrovsky <[email protected]> Reviewed-by: Wei Liu <[email protected]> Signed-off-by: David Vrabel <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/xen/xenbus/xenbus_client.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/drivers/xen/xenbus/xenbus_client.c +++ b/drivers/xen/xenbus/xenbus_client.c @@ -814,8 +814,10 @@ static int xenbus_unmap_ring_vfree_hvm(s rv = xenbus_unmap_ring(dev, node->handles, node->nr_handles, addrs); - if (!rv) + if (!rv) { vunmap(vaddr); + free_xenballooned_pages(node->nr_handles, node->hvm.pages); + } else WARN(1, "Leaking %p, size %u page(s)\n", vaddr, node->nr_handles); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
