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 must protect against unpatched
kernels.

Handle unexpected buffers by returning a nullptr, and move cache
management after the validation of the buffer.

Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Change-Id: I8c8e0b72a2e529589a1e68b4bcd25bb11c261879

0 files changed, 0 insertions, 0 deletions