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avcodec/utils: the IFF_ILBM implementation assumes that there are a multiple of 16 allocated

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Fixes: out of array access
Fixes: 45982/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_IFF_ILBM_fuzzer-5124452659888128
Fixes: 45982/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_IFF_ILBM_fuzzer-6362836707442688

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 34056a94eab5f8fbc7e0b8510f7c9851931f23b7)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2023-04-16 16:56:40 +02:00
parent b9c79be726
commit 0c2b08227e
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1 changed files with 1 additions and 1 deletions
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libavcodec/utils.c
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@ -316,7 +316,7 @@ void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
} }
if (s->codec_id == AV_CODEC_ID_IFF_ILBM) { if (s->codec_id == AV_CODEC_ID_IFF_ILBM) {
w_align = FFMAX(w_align, 8); w_align = FFMAX(w_align, 16);
} }
*width = FFALIGN(*width, w_align); *width = FFALIGN(*width, w_align);