Fixes: signed integer overflow: 9223372036840103978 + 67637280 cannot be represented in type 'long'
Fixes: 33341/clusterfuzz-testcase-minimized-ffmpeg_dem_DSF_fuzzer-6408154041679872
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
int isv34, unsync;
unsigned tlen;
char tag[5];
- int64_t next, end = avio_tell(pb) + len;
+ int64_t next, end = avio_tell(pb);
int taghdrlen;
const char *reason = NULL;
AVIOContext pb_local;
av_unused int uncompressed_buffer_size = 0;
const char *comm_frame;
+ if (end > INT64_MAX - len - 10)
+ return;
+ end += len;
+
av_log(s, AV_LOG_DEBUG, "id3v2 ver:%d flags:%02X len:%d\n", version, flags, len);
switch (version) {