diff options
| author | Julien Grall <julien.grall@citrix.com> | 2015-08-10 19:10:38 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-09-13 09:07:40 -0700 |
| commit | eb63f85afac03722b2229d61c39fec3083fcfa53 (patch) | |
| tree | e2e97615df747d994054d59cae0a81c69c5cc22f /drivers/xen | |
| parent | 0733a428056a18a6fbb1b57664a98cee4761d634 (diff) | |
xen/xenbus: Don't leak memory when unmapping the ring on HVM backend
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 <julien.grall@citrix.com>
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/xen')
| -rw-r--r-- | drivers/xen/xenbus/xenbus_client.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/xen/xenbus/xenbus_client.c b/drivers/xen/xenbus/xenbus_client.c index 96b2011d25f3..658be6cc3db6 100644 --- 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(struct xenbus_device *dev, void *vaddr) 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); |