mirror of https://git.ffmpeg.org/ffmpeg.git
libavformat/iff: Check for overflow in body_end calculation
Fixes: signed integer overflow: -6322983228386819992 - 5557477266266529857 cannot be represented in type 'long'
Fixes: 50112/clusterfuzz-testcase-minimized-ffmpeg_dem_IFF_fuzzer-6329186221948928
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 bcb4690304
)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -502,6 +502,9 @@ static int iff_read_header(AVFormatContext *s)
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case ID_DST:
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case ID_MDAT:
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iff->body_pos = avio_tell(pb);
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if (iff->body_pos < 0 || iff->body_pos + data_size > INT64_MAX)
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return AVERROR_INVALIDDATA;
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iff->body_end = iff->body_pos + data_size;
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iff->body_size = data_size;
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if (chunk_id == ID_DST) {
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