kernel/linux.git/drivers/media/mc, branch v6.18.21

media: mc, v4l2: serialize REINIT and REQBUFS with req_queue_mutex

2026-04-02T11:23:19+00:00

commit bef4f4a88b73e4cc550d25f665b8a9952af22773 upstream. MEDIA_REQUEST_IOC_REINIT can run concurrently with VIDIOC_REQBUFS(0) queue teardown paths. This can race request object cleanup against vb2 queue cancellation and lead to use-after-free reports. We already serialize request queueing against STREAMON/OFF with req_queue_mutex. Extend that serialization to REQBUFS, and also take the same mutex in media_request_ioctl_reinit() so REINIT is in the same exclusion domain. This keeps request cleanup and queue cancellation from running in parallel for request-capable devices. Fixes: 6093d3002eab ("media: vb2: keep a reference to the request until dqbuf") Cc: stable@vger.kernel.org Signed-off-by: Yuchan Nam Signed-off-by: Sakari Ailus Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Greg Kroah-Hartman

media: mc: Clear minor number before put device

2025-09-10T08:42:13+00:00

The device minor should not be cleared after the device is released. Fixes: 9e14868dc952 ("media: mc: Clear minor number reservation at unregistration time") Cc: stable@vger.kernel.org Reported-by: syzbot+031d0cfd7c362817963f@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=031d0cfd7c362817963f Tested-by: syzbot+031d0cfd7c362817963f@syzkaller.appspotmail.com Signed-off-by: Edward Adam Davis Signed-off-by: Sakari Ailus Signed-off-by: Hans Verkuil

media: mc: Clear minor number reservation at unregistration time

2025-09-09T13:59:16+00:00

Clear the media device's minor number reservation at unregister time as there's no need to keep it reserved for longer. This makes it possible to reserve the same minor right after unregistration. Signed-off-by: Sakari Ailus Acked-by: Hans Verkuil Signed-off-by: Hans Verkuil

media: update Hans Verkuil's email address

2025-09-09T13:58:44+00:00

Replace hansverk@cisco.com by hverkuil@kernel.org. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

media: mc: Improve unconnected pads debugging message in link exploration

2025-08-25T13:40:44+00:00

When exploring links, a message is printed to indicate unconnected pads being added. The message prints the entity name only. Print the origin pad number as well to help with debugging pipeline start issues. While at it, get the entity name from origin->entity instead of local->entity. Both point to the same entity, but the former conveys the meaning better. Signed-off-by: Laurent Pinchart Acked-by: Sakari Ailus Signed-off-by: Sakari Ailus Signed-off-by: Hans Verkuil

media: mc: Fix MUST_CONNECT handling for pads with no links

2025-08-25T13:40:44+00:00

Commit b3decc5ce7d7 ("media: mc: Expand MUST_CONNECT flag to always require an enabled link") expanded the meaning of the MUST_CONNECT flag to require an enabled link in all cases. To do so, the link exploration code was expanded to cover unconnected pads, in order to reject those that have the MUST_CONNECT flag set. The implementation was however incorrect, ignoring unconnected pads instead of ignoring connected pads. Fix it. Reported-by: Martin Kepplinger-Novaković Closes: https://lore.kernel.org/linux-media/20250205172957.182362-1-martink@posteo.de Reported-by: Maud Spierings Closes: https://lore.kernel.org/linux-media/20250818-imx8_isi-v1-1-e9cfe994c435@gocontroll.com Fixes: b3decc5ce7d7 ("media: mc: Expand MUST_CONNECT flag to always require an enabled link") Cc: stable@vger.kernel.org # 6.1 Signed-off-by: Laurent Pinchart Tested-by: Maud Spierings Tested-by: Martin Kepplinger-Novaković Signed-off-by: Sakari Ailus Signed-off-by: Hans Verkuil

Merge tag 'media/v6.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

2024-11-20T22:01:15+00:00

Pull media updates from Mauro Carvalho Chehab: - removal of the old omap4iss media driver - mantis: remove orphan mantis_core.h - add support for Raspberypi CFE - uvc driver got a co-maintainer - main media tree moved to git://linuxtv.org/media.git - lots of driver cleanups, updates and fixes * tag 'media/v6.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (233 commits) docs: media: update location of the media patches MAINTAINERS: update location of media main tree media: MAINTAINERS: Add Hans de Goede as USB VIDEO CLASS co-maintainer media: platform: samsung: s5p-jpeg: Remove deadcode media: qcom: camss: Add MSM8953 resources media: dt-bindings: Add qcom,msm8953-camss media: qcom: camss: implement pm domain ops for VFE v4.1 media: platform: exynos4-is: Fix an OF node reference leak in fimc_md_is_isp_available media: adv7180: Also check for "adi,force-bt656-4" media: dt-bindings: adv7180: Document 'adi,force-bt656-4' media: mgb4: Fix inconsistent input/output alignment in loopback mode media: replace obsolete hans.verkuil@cisco.com alias Documentation: media: improve V4L2_CID_MIN_BUFFERS_FOR_*, doc media: vicodec: add V4L2_CID_MIN_BUFFERS_FOR_* controls media: atomisp: Add check for rgby_data memory allocation failure media: atomisp: remove redundant re-checking of err media: atomisp: Fix spelling errors reported by codespell media: atomisp: Remove License information boilerplate media: atomisp: Fix typos in comment media: atomisp: hmm_bo: Fix spelling errors in hmm_bo.h ...

media: replace obsolete hans.verkuil@cisco.com alias

2024-11-08T12:38:09+00:00

The old hans.verkuil@cisco.com email address was discontinued years ago. Replace it with the correct hansverk@cisco.com email. Signed-off-by: Hans Verkuil

media: mc: Rename pad as origin in __media_pipeline_start()

2024-11-07T08:05:58+00:00

Rename the pad field in __media_pipeline_start() to both better describe what it is and avoid masking it during the loop. Signed-off-by: Sakari Ailus Reviewed-by: Laurent Pinchart Signed-off-by: Hans Verkuil

convert media_request_get_by_fd()

2024-11-03T06:28:07+00:00

the only thing done after fdput() (in failure cases) is a printk; safely transposable with fdput()... Reviewed-by: Christian Brauner Signed-off-by: Al Viro