media: v4l2-dev: Add range check for vdev->minor

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If the fixed minor ranges are not properly set we could end up in a
situation where the calculated minor is invalid. Add a check for this in
the code to make it more robust.

This check also fixes the following false positive smatch warning:

drivers/media/v4l2-core/v4l2-dev.c:1036 __video_register_device() error: buffer overflow 'video_devices' 256 <= 288
drivers/media/v4l2-core/v4l2-dev.c:1043 __video_register_device() error: buffer overflow 'video_devices' 256 <= 288
drivers/media/v4l2-core/v4l2-dev.c:1101 __video_register_device() error: buffer overflow 'video_devices' 256 <= 288

Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>

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Ricardo Ribalda 2026-05-07 20:58:06 +00:00 • committed by Hans Verkuil

parent d5b5005533

commit 5328dd0ce2

1 changed files with 5 additions and 0 deletions

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drivers/media/v4l2-core/v4l2-dev.c

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