Fixes: signed integer overflow: -2147483648 - 4 cannot be represented in type 'int'
Fixes: 26907/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_CFHD_fuzzer-5746202330267648
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
s->peak.level = 0;
} else if (tag == -PeakLevel && s->peak.offset) {
s->peak.level = data;
+ if (s->peak.offset < 4 - bytestream2_tell(&s->peak.base) ||
+ s->peak.offset > 4 + bytestream2_get_bytes_left(&s->peak.base)
+ ) {
+ ret = AVERROR_INVALIDDATA;
+ goto end;
+ }
bytestream2_seek(&s->peak.base, s->peak.offset - 4, SEEK_CUR);
} else
av_log(avctx, AV_LOG_DEBUG, "Unknown tag %i data %x\n", tag, data);