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avformat/wavdec: satuarte next_tag_ofs, data_end

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Fixes: signed integer overflow: 5053074104798691550 + 5053074104259715104 cannot be represented in type 'long'
Fixes: 62276/clusterfuzz-testcase-minimized-ffmpeg_dem_WAV_fuzzer-6515315309936640

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 61dca9e150)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2024-03-26 00:50:36 +01:00
parent 4db0eb4653
commit 3c37c0a7be
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1 changed files with 1 additions and 1 deletions
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libavformat/wavdec.c
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@ -444,7 +444,7 @@ static int wav_read_header(AVFormatContext *s)
}
if (rf64 || bw64) {
next_tag_ofs = wav->data_end = avio_tell(pb) + data_size;
next_tag_ofs = wav->data_end = av_sat_add64(avio_tell(pb), data_size);
} else if (size != 0xFFFFFFFF) {
data_size = size;
next_tag_ofs = wav->data_end = size ? next_tag_ofs : INT64_MAX;