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Subject: media: usbtv: Fix refcounting mixup Author: Oliver Neukum oneukum@suse.com Date: Thu Sep 24 11:14:10 2020 +0200
The premature free in the error path is blocked by V4L refcounting, not USB refcounting. Thanks to Ben Hutchings for review.
[v2] corrected attributions
Signed-off-by: Oliver Neukum oneukum@suse.com Fixes: 50e704453553 ("media: usbtv: prevent double free in error case") CC: stable@vger.kernel.org Reported-by: Ben Hutchings ben.hutchings@codethink.co.uk Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Signed-off-by: Mauro Carvalho Chehab mchehab+huawei@kernel.org
drivers/media/usb/usbtv/usbtv-core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/drivers/media/usb/usbtv/usbtv-core.c b/drivers/media/usb/usbtv/usbtv-core.c index ee9c656d121f..2308c0b4f5e7 100644 --- a/drivers/media/usb/usbtv/usbtv-core.c +++ b/drivers/media/usb/usbtv/usbtv-core.c @@ -113,7 +113,8 @@ static int usbtv_probe(struct usb_interface *intf,
usbtv_audio_fail: /* we must not free at this point */ - usb_get_dev(usbtv->udev); + v4l2_device_get(&usbtv->v4l2_dev); + /* this will undo the v4l2_device_get() */ usbtv_video_free(usbtv);
usbtv_video_fail: