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authorKieran Bingham <kieran.bingham@ideasonboard.com>2021-09-09 16:08:03 +0100
committerKieran Bingham <kieran.bingham@ideasonboard.com>2021-09-14 12:54:45 +0100
commit4cf7a8fc0bd5a2c6b606f27101d905f63a846b5f (patch)
tree138cd9d3938a3e02be9cbcd03c09ece25b23c247 /src/qcam/assets/shader/YUV_2_planes.frag
parent3bcb7a90c1b1404e51015bda9add4d2ba467c052 (diff)
libcamera: v4l2_videodevice: Handle unexpected buffers
A kernel bug can lead to unexpected buffers being dequeued where we haven't entered the buffer in our queuedBuffers_ list. This causes invalid accesses if not handled correctly within libcamera, and while it is a kernel issue, we can protect against unpatched kernels to provide a more suitable error message. This is fixed in the kernel by commit c592b46907ad ("media: videobuf2-core: dequeue if start_streaming fails") [0] [0] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c592b46907ad Handle unexpected buffers by returning a nullptr, and move cache management after the validation of the buffer. Reviewed-by: Paul Elder <paul.elder@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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