diff options
| author | Guennadi Liakhovetski <g.liakhovetski@gmx.de> | 2009-10-05 12:54:54 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-11-07 12:55:07 -0200 |
| commit | 76823b791d867c2ab563c237f188d0cbb4ced6e1 (patch) | |
| tree | 8dd614f79437063fda0f4860caf61255506f880a /drivers/media | |
| parent | 07bc46e6671b4533a5e56607ddec9de9079c1844 (diff) | |
| download | op-kernel-dev-76823b791d867c2ab563c237f188d0cbb4ced6e1.zip op-kernel-dev-76823b791d867c2ab563c237f188d0cbb4ced6e1.tar.gz | |
V4L/DVB (13132): fix use-after-free Oops, resulting from a driver-core API change
Commit b4028437876866aba4747a655ede00f892089e14 has broken again re-use of
device objects across device_register() / device_unregister() cycles. Fix
soc-camera by nullifying the struct after device_unregister().
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/video/soc_camera.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/drivers/media/video/soc_camera.c b/drivers/media/video/soc_camera.c index 59aa7a3..36e617bd 100644 --- a/drivers/media/video/soc_camera.c +++ b/drivers/media/video/soc_camera.c @@ -1160,13 +1160,15 @@ void soc_camera_host_unregister(struct soc_camera_host *ici) if (icd->iface == ici->nr) { /* The bus->remove will be called */ device_unregister(&icd->dev); - /* Not before device_unregister(), .remove - * needs parent to call ici->ops->remove() */ - icd->dev.parent = NULL; - - /* If the host module is loaded again, device_register() - * would complain "already initialised" */ - memset(&icd->dev.kobj, 0, sizeof(icd->dev.kobj)); + /* + * Not before device_unregister(), .remove + * needs parent to call ici->ops->remove(). + * If the host module is loaded again, device_register() + * would complain "already initialised," since 2.6.32 + * this is also needed to prevent use-after-free of the + * device private data. + */ + memset(&icd->dev, 0, sizeof(icd->dev)); } } |
