diff options
| author | G. Campana <gcampana@quarkslab.com> | 2017-01-19 23:37:46 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2017-01-19 23:46:31 +0200 |
| commit | 8379cadf71c3ee8173a1c6fc1ea7762a9638c047 (patch) | |
| tree | 7c2fab5b7c5ea52202919e83e0bb0e4801193c21 | |
| parent | 532e15af105a0b86211f515bd5fec1f4cdd9f27b (diff) | |
| download | linux-8379cadf71c3ee8173a1c6fc1ea7762a9638c047.tar.bz2 | |
virtio_console: fix a crash in config_work_handler
Using control_work instead of config_work as the 3rd argument to
container_of results in an invalid portdev pointer. Indeed, the work
structure is initialized as below:
INIT_WORK(&portdev->config_work, &config_work_handler);
It leads to a crash when portdev->vdev is dereferenced later. This
bug
is triggered when the guest uses a virtio-console without multiport
feature and receives a config_changed virtio interrupt.
Signed-off-by: G. Campana <gcampana@quarkslab.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| -rw-r--r-- | drivers/char/virtio_console.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index 8b00e79c2683..17857beb4892 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -1862,7 +1862,7 @@ static void config_work_handler(struct work_struct *work) { struct ports_device *portdev; - portdev = container_of(work, struct ports_device, control_work); + portdev = container_of(work, struct ports_device, config_work); if (!use_multiport(portdev)) { struct virtio_device *vdev; struct port *port; |