Fixes: signed integer overflow: 9223372036854775723 + 8192 cannot be represented in type 'long'
Fixes: 29072/clusterfuzz-testcase-minimized-ffmpeg_dem_MXF_fuzzer-4812604904177664
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
int ret;
int tag = avio_rb16(pb);
int size = avio_rb16(pb); /* KLV specified by 0x53 */
- uint64_t next = avio_tell(pb) + size;
+ int64_t next = avio_tell(pb);
UID uid = {0};
+ if (next < 0 || next > INT64_MAX - size)
+ return next < 0 ? next : AVERROR_INVALIDDATA;
+ next += size;
av_log(mxf->fc, AV_LOG_TRACE, "local tag %#04x size %d\n", tag, size);
if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */