This is an automatic generated email to let you know that the following patch were queued:
Subject: media: v4l2-core: fix a use-after-free bug of sd->devnode
Author: Dafna Hirschfeld <dafna.hirschfeld@xxxxxxxxxxxxx>
Date: Wed Feb 19 16:25:54 2020 +0100
sd->devnode is released after calling
v4l2_subdev_release. Therefore it should be set
to NULL so that the subdev won't hold a pointer
to a released object. This fixes a reference
after free bug in function
v4l2_device_unregister_subdev
Fixes: 0e43734d4c46e ("media: v4l2-subdev: add release() internal op")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@xxxxxxxxxxxxx>
Reviewed-by: Ezequiel Garcia <ezequiel@xxxxxxxxxxxxx>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
drivers/media/v4l2-core/v4l2-device.c | 1 +
1 file changed, 1 insertion(+)
---
diff --git a/drivers/media/v4l2-core/v4l2-device.c b/drivers/media/v4l2-core/v4l2-device.c
index 63d6b147b21e..41da73ce2e98 100644
--- a/drivers/media/v4l2-core/v4l2-device.c
+++ b/drivers/media/v4l2-core/v4l2-device.c
@@ -179,6 +179,7 @@ static void v4l2_subdev_release(struct v4l2_subdev *sd)
if (sd->internal_ops && sd->internal_ops->release)
sd->internal_ops->release(sd);
+ sd->devnode = NULL;
module_put(owner);
}
