This series introduces a new metadata format for UVC cameras and adds a couple of improvements to the UVC metadata handling.
The new metadata format can be enabled in runtime with quirks.
Signed-off-by: Ricardo Ribalda ribalda@chromium.org --- Changes in v7: - Add patch: Introduce dev->meta_formats - Link to v6: https://lore.kernel.org/r/20250604-uvc-meta-v6-0-7141d48c322c@chromium.org
Changes in v6 (Thanks Laurent): - Fix typo in metafmt-uvc.rst - Improve metafmt-uvc-msxu-1-5.rst - uvc_meta_v4l2_try_format() block MSXU format unless the quirk is active - Refactor uvc_enable_msxu - Document uvc_meta_detect_msxu - Rebase series - Add R-b - Link to v5: https://lore.kernel.org/r/20250404-uvc-meta-v5-0-f79974fc2d20@chromium.org
Changes in v5: - Fix codestyle and kerneldoc warnings reported by media-ci - Link to v4: https://lore.kernel.org/r/20250403-uvc-meta-v4-0-877aa6475975@chromium.org
Changes in v4: - Rename format to V4L2_META_FMT_UVC_MSXU_1_5 (Thanks Mauro) - Flag the new format with a quirk. - Autodetect MSXU devices. - Link to v3: https://lore.kernel.org/linux-media/20250313-uvc-metadata-v3-0-c467af869c60@...
Changes in v3: - Fix doc syntax errors. - Link to v2: https://lore.kernel.org/r/20250306-uvc-metadata-v2-0-7e939857cad5@chromium.o...
Changes in v2: - Add metadata invalid fix - Move doc note to a separate patch - Introduce V4L2_META_FMT_UVC_CUSTOM (thanks HdG!). - Link to v1: https://lore.kernel.org/r/20250226-uvc-metadata-v1-1-6cd6fe5ec2cb@chromium.o...
--- Ricardo Ribalda (5): media: uvcvideo: Do not mark valid metadata as invalid media: Documentation: Add note about UVCH length field media: uvcvideo: Introduce dev->meta_formats media: uvcvideo: Introduce V4L2_META_FMT_UVC_MSXU_1_5 media: uvcvideo: Auto-set UVC_QUIRK_MSXU_META
.../userspace-api/media/v4l/meta-formats.rst | 1 + .../media/v4l/metafmt-uvc-msxu-1-5.rst | 23 ++++ .../userspace-api/media/v4l/metafmt-uvc.rst | 4 +- MAINTAINERS | 1 + drivers/media/usb/uvc/uvc_driver.c | 7 ++ drivers/media/usb/uvc/uvc_metadata.c | 133 +++++++++++++++++++-- drivers/media/usb/uvc/uvc_video.c | 12 +- drivers/media/usb/uvc/uvcvideo.h | 3 + drivers/media/v4l2-core/v4l2-ioctl.c | 1 + include/linux/usb/uvc.h | 3 + include/uapi/linux/videodev2.h | 1 + 11 files changed, 175 insertions(+), 14 deletions(-) --- base-commit: c3021d6a80ff05034dfee494115ec71f1954e311 change-id: 20250403-uvc-meta-e556773d12ae
Best regards,
Currently, the driver performs a length check of the metadata buffer before the actual metadata size is known and before the metadata is decided to be copied. This results in valid metadata buffers being incorrectly marked as invalid.
Move the length check to occur after the metadata size is determined and is decided to be copied.
Cc: stable@vger.kernel.org Fixes: 088ead255245 ("media: uvcvideo: Add a metadata device node") Reviewed-by: Laurent Pinchart laurent.pinchart@ideasonboard.com Reviewed-by: Hans de Goede hansg@kernel.org Signed-off-by: Ricardo Ribalda ribalda@chromium.org --- drivers/media/usb/uvc/uvc_video.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c index 11769a1832d2ba9b3f9a50bcb10b0c4cdff71f09..2e377e7b9e81599aca19b800a171cc16a09c1e8a 100644 --- a/drivers/media/usb/uvc/uvc_video.c +++ b/drivers/media/usb/uvc/uvc_video.c @@ -1442,12 +1442,6 @@ static void uvc_video_decode_meta(struct uvc_streaming *stream, if (!meta_buf || length == 2) return;
- if (meta_buf->length - meta_buf->bytesused < - length + sizeof(meta->ns) + sizeof(meta->sof)) { - meta_buf->error = 1; - return; - } - has_pts = mem[1] & UVC_STREAM_PTS; has_scr = mem[1] & UVC_STREAM_SCR;
@@ -1468,6 +1462,12 @@ static void uvc_video_decode_meta(struct uvc_streaming *stream, !memcmp(scr, stream->clock.last_scr, 6))) return;
+ if (meta_buf->length - meta_buf->bytesused < + length + sizeof(meta->ns) + sizeof(meta->sof)) { + meta_buf->error = 1; + return; + } + meta = (struct uvc_meta_buf *)((u8 *)meta_buf->mem + meta_buf->bytesused); local_irq_save(flags); time = uvc_video_get_time();
linux-stable-mirror@lists.linaro.org
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Ricardo Ribalda