Re: [FFmpeg-devel] [PATCH 1/7] avcodec/mmvideo: fix paltte index

[Michael Niedermayer <michael@niedermayer.cc>]

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On Fri, May 09, 2025 at 07:06:42PM +1000, Peter Ross wrote:
> On Thu, May 08, 2025 at 11:57:32PM +0200, Michael Niedermayer wrote:
> > Fixes: 391935573/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MMVIDEO_fuzzer-4655048979709952
> > Fixes: out of array access
> > 
> > Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
> > Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
> > ---
> >  libavcodec/mmvideo.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/libavcodec/mmvideo.c b/libavcodec/mmvideo.c
> > index 7313507debc..2a0c855992e 100644
> > --- a/libavcodec/mmvideo.c
> > +++ b/libavcodec/mmvideo.c
> > @@ -91,7 +91,7 @@ static void mm_decode_pal(MmContext *s)
> >      int start = bytestream2_get_le16(&s->gb);
> >      int count = bytestream2_get_le16(&s->gb);
> >      for (int i = 0; i < count; i++)
> > -        s->palette[start+i] = 0xFFU << 24 | (bytestream2_get_be24(&s->gb) << 2);
> > +        s->palette[(start+i)&0xFF] = 0xFFU << 24 | (bytestream2_get_be24(&s->gb) << 2);
> >  }
> >
> 
> please apply

will apply

thx

[...]

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Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

If you fake or manipulate statistics in a paper in physics you will never
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