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avcodec/ffv1dec: Limit golomb rice coded slices to width 8M 

This limit is possibly not reachable due to other restrictions on buffers but
the decoder run table is too small beyond this, so explicitly check for it.

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit b4431399ec)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2022-07-03 13:31:19 +02:00
parent aedff4dc8b
commit f7b403bba6
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1 changed files with 3 additions and 0 deletions
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libavcodec/ffv1dec.c
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@ -188,6 +188,9 @@ static int decode_slice_header(FFV1Context *f, FFV1Context *fs)
|| (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)
return -1;
if (fs->ac == AC_GOLOMB_RICE && fs->slice_width >= (1<<23))
return AVERROR_INVALIDDATA;
for (i = 0; i < f->plane_count; i++) {
PlaneContext * const p = &fs->plane[i];
int idx = get_symbol(c, state, 0);