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avcodec/utils: use 32pixel alignment for bink

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bink supports 16x16 blocks in chroma planes thus we need to allocate enough.
Fixes: out of array access
Fixes: 55026/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_BINK_fuzzer-6013915371012096
Reviewed-by: Peter Ross <pross@xvid.org>

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit b95b2c8492fc1b52afd8fbe67b3be3cd518485d6)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2023-01-22 00:32:44 +01:00
parent b353459820
commit 4c9ba64d54
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1 changed files with 2 additions and 0 deletions
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libavcodec/utils.c
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@ -256,6 +256,8 @@ void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
case AV_PIX_FMT_GBRAP16BE:
w_align = 16; //FIXME assume 16 pixel per macroblock
h_align = 16 * 2; // interlaced needs 2 macroblocks height
if (s->codec_id == AV_CODEC_ID_BINKVIDEO)
w_align = 16*2;
break;
case AV_PIX_FMT_YUV411P:
case AV_PIX_FMT_YUVJ411P: