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| author | Julien Grall <julien.grall@citrix.com> | 2015-08-10 19:10:38 +0100 |
|---|---|---|
| committer | David Vrabel <david.vrabel@citrix.com> | 2015-08-11 11:05:58 +0100 |
| commit | c22fe519e7e2b94ad173e0ea3b89c1a7d8be8d00 (patch) | |
| tree | e93375e27bd4cc47c02b1ee2e8961a990ba48f8f /drivers/xen/xenbus/xenbus_client.c | |
| parent | ad6cd7bafcd2c812ba4200d5938e07304f1e2fcd (diff) | |
| download | linux-c22fe519e7e2b94ad173e0ea3b89c1a7d8be8d00.tar.gz linux-c22fe519e7e2b94ad173e0ea3b89c1a7d8be8d00.tar.bz2 linux-c22fe519e7e2b94ad173e0ea3b89c1a7d8be8d00.zip | |
xen/xenbus: Don't leak memory when unmapping the ring on HVM backend
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>
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>
Diffstat (limited to 'drivers/xen/xenbus/xenbus_client.c')
| -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 9ad327238ba9..e30353575d5d 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); |