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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-07-19 16:20:52 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-07-20 19:47:27 +0200 |
| commit | b6663adaae948a66574dff58923a862774663439 (patch) | |
| tree | 919acce07c3f88eebddd220993e543c8ee624955 | |
| parent | 80286671c5594957d74120b3b5f47b774e98c661 (diff) | |
| download | ffmpeg-b6663adaae948a66574dff58923a862774663439.tar.gz | |
avformat/sbgdec: Check for overflow in parse_timestamp()
Fixes: signed integer overflow: 33986707200000000 + 9195561788997000192 cannot be represented in type 'long'
Fixes: 23790/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-6554232198266880
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/sbgdec.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavformat/sbgdec.c b/libavformat/sbgdec.c index de1de271bb..c11244ef3d 100644 --- a/libavformat/sbgdec.c +++ b/libavformat/sbgdec.c @@ -474,6 +474,8 @@ static int parse_timestamp(struct sbg_parser *p, while (lex_char(p, '+')) { if (!lex_time(p, &dt)) return AVERROR_INVALIDDATA; + if (av_sat_add64(rel, dt) - dt != rel) + return AVERROR_INVALIDDATA; rel += dt; r = 1; } |