Re: [FFmpeg-devel] [PATCH 6/7] avcodec/rv60dec: inter also fails with qp >= 32

[Peter Ross <pross@xvid.org>]

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On Thu, May 08, 2025 at 11:57:37PM +0200, Michael Niedermayer wrote:
> Fixes: out of array read in decode_cu_16x16()
> Fixes: 398049430/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_RV60_fuzzer-5525836849807360
> 
> Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
> ---
>  libavcodec/rv60dec.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/libavcodec/rv60dec.c b/libavcodec/rv60dec.c
> index 24981015a94..d704ae512c2 100644
> --- a/libavcodec/rv60dec.c
> +++ b/libavcodec/rv60dec.c
> @@ -1791,7 +1791,7 @@ static int decode_cu_r(RV60Context * s, AVFrame * frame, ThreadContext * thread,
>          ttype = cu.pu_type == PU_FULL ? TRANSFORM_8X8 : TRANSFORM_4X4;
>  
>      is_intra = cu.cu_type == CU_INTRA;
> -    if (is_intra && qp >= 32)
> +    if (qp >= 32)
>          return AVERROR_INVALIDDATA;
>      cu_pos = ((xpos & 63) >> 3) + ((ypos & 63) >> 3) * 8;

please apply

-- Peter
(A907 E02F A6E5 0CD2 34CD 20D2 6760 79C5 AC40 DD6B)

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