linux/drivers/virtio
Konstantin Neumoin cfb466bd40 balloon: check the number of available pages in leak balloon
commit 37cf99e08c upstream.

The balloon has a special mechanism that is subscribed to the oom
notification which leads to deflation for a fixed number of pages.
The number is always fixed even when the balloon is fully deflated.
But leak_balloon did not expect that the pages to deflate will be more
than taken, and raise a "BUG" in balloon_page_dequeue when page list
will be empty.

So, the simplest solution would be to check that the number of releases
pages is less or equal to the number taken pages.

Signed-off-by: Konstantin Neumoin <kneumoin@virtuozzo.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
CC: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2016-08-20 18:09:23 +02:00
..
config.c Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
Kconfig Add virtio-input driver. 2015-03-29 12:13:52 +10:30
Makefile Add virtio-input driver. 2015-03-29 12:13:52 +10:30
virtio.c virtio: fix memory leak of virtio ida cache layers 2015-12-07 17:28:01 +02:00
virtio_balloon.c balloon: check the number of available pages in leak balloon 2016-08-20 18:09:23 +02:00
virtio_input.c virtio-input: reset device and detach unused during remove 2015-08-06 10:40:35 +03:00
virtio_mmio.c virtio_mmio: add ACPI probing 2015-09-08 13:30:28 +03:00
virtio_pci_common.c virtio_pci: fix use after free on release 2016-03-03 15:07:18 -08:00
virtio_pci_common.h virtio-pci: alloc only resources actually used. 2015-06-24 08:15:09 +02:00
virtio_pci_legacy.c virtio-pci: alloc only resources actually used. 2015-06-24 08:15:09 +02:00
virtio_pci_modern.c virtio: virtio 1.0 cs04 spec compliance for reset 2016-04-20 15:42:10 +09:00
virtio_ring.c virtio_ring: shadow available ring flags & index 2015-12-07 17:28:11 +02:00