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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-10-20 21:55:13 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-09 13:53:29 +0200 |
| commit | c7a3dacf539c45157b4f763c95f61c4f8311db0e (patch) | |
| tree | 6c2dacdb0ff41f96fcd15f505c5642d94f34fe64 | |
| parent | ce445adcbd8abcc3d22af8752f6a792e09cbca3c (diff) | |
| download | ffmpeg-c7a3dacf539c45157b4f763c95f61c4f8311db0e.tar.gz | |
avformat/lrcdec: Clip timestamps
Fixes: signed integer overflow: 7111111111111531010 - -7335632962598013506 cannot be represented in type 'long'
Fixes: 26463/clusterfuzz-testcase-minimized-ffmpeg_dem_LRC_fuzzer-6015558333759488
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 80bc2ac3c06319cf85428c58c471d105d25ae987)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/lrcdec.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavformat/lrcdec.c b/libavformat/lrcdec.c index 45f0bf24a7..fa379372a1 100644 --- a/libavformat/lrcdec.c +++ b/libavformat/lrcdec.c @@ -185,6 +185,8 @@ static int lrc_read_header(AVFormatContext *s) sscanf(comma_offset + 1, "%"SCNd64, &lrc->ts_offset) != 1) { av_dict_set(&s->metadata, line.str + 1, comma_offset + 1, 0); } + lrc->ts_offset = av_clip64(lrc->ts_offset, INT64_MIN/4, INT64_MAX/4); + *comma_offset = ':'; *right_bracket_offset = ']'; } @@ -198,6 +200,7 @@ static int lrc_read_header(AVFormatContext *s) while((ts_stroffset_incr = read_ts(line.str + ts_stroffset, &ts_start)) != 0) { + ts_start = av_clip64(ts_start, INT64_MIN/4, INT64_MAX/4); ts_stroffset += ts_stroffset_incr; sub = ff_subtitles_queue_insert(&lrc->q, line.str + ts_strlength, line.len - ts_strlength, 0); |