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avformat/jpegxl_anim_dec: ensure input padding is zeroed

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Fixes use of uninitialized value, reported by MSAN.

Found by OSS-Fuzz.

Signed-off-by: Kacper Michajłow <kasper93@gmail.com>

Fixes: 70837/clusterfuzz-testcase-minimized-ffmpeg_dem_JPEGXL_ANIM_fuzzer-5089407768526848
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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Kacper Michajłow 2024-06-27 02:40:37 +02:00 committed by Michael Niedermayer
parent 3978e81809
commit 2b5f000d3f
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1 changed files with 2 additions and 0 deletions
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libavformat/jpegxl_anim_dec.c
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@ -124,6 +124,8 @@ static int jpegxl_anim_read_header(AVFormatContext *s)
}
}
memset(head + headsize, 0, AV_INPUT_BUFFER_PADDING_SIZE);
/* offset in bits of the animation header */
ret = ff_jpegxl_parse_codestream_header(head, headsize, &meta, 0);
if (ret < 0 || meta.animation_offset <= 0)