[PATCH] media: cedrus: validate H.264 reference list indices

[Pengpeng Hou]

Hi Jernej,

Thanks, that makes sense.

You're right that rejecting the H.264 slice control in cedrus_try_ctrl()
would have the same userspace compatibility problem as the HEVC case.
I'll drop that approach and respin this as a separate Cedrus patch that
skips out-of-range reference list indices at the point where
_cedrus_write_ref_list() resolves them into decode->dpb[] entries.

Best regards,
Pengpeng