diff options
| author | Luiz Capitulino <lcapitulino@redhat.com> | 2013-07-02 15:35:13 +0930 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-07-25 14:07:31 -0700 |
| commit | ebfc049ce8e32b5ff6bf6fec74775ac021769f37 (patch) | |
| tree | ae447ceae1642cf9bc5649082b2b448cb6ae0740 /kernel | |
| parent | 0531603e3a0dbb7c36f2b37833add0e73b8c0c5f (diff) | |
virtio_balloon: leak_balloon(): only tell host if we got pages deflated
commit 8c6bab4f3874d31804a00782c48a8f244a0d3cc0 upstream.
balloon_page_dequeue() can return NULL. If it does for the first page
being freed then leak_balloon() will create a scatter list with len=0.
Which in turn seems to generate an invalid virtio request.
I didn't get this in practice, I found it by code review. On the other
hand, such an invalid virtio request will cause errors in QEMU and
fill_balloon() also performs the same check implemented by this commit.
This bug was introduced in e2250429.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Acked-by: Rafael Aquini <aquini@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions