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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-06-23 01:43:14 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-07-01 12:49:26 +0200 |
| commit | 620374a3af3e5b506e39713dadfde9d3ac9ca0f6 (patch) | |
| tree | 3593adf1265d3023919c2116746907e98fb3740d | |
| parent | f6e7fbd510d53af2c7f727e03239569b95d333e2 (diff) | |
| download | ffmpeg-620374a3af3e5b506e39713dadfde9d3ac9ca0f6.tar.gz | |
avformat/microdvddec: skip malformed lines without frame number.
Fixes: signed integer overflow: 1 - -9223372036854775808 cannot be represented in type 'long'
Fixes: 23490/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5133490093031424
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>
(cherry picked from commit a8fb7612a97530bdd0b2549dacf91dcf71a3187a)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/microdvddec.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/libavformat/microdvddec.c b/libavformat/microdvddec.c index c2f1ac45cd..bf71c5e770 100644 --- a/libavformat/microdvddec.c +++ b/libavformat/microdvddec.c @@ -94,6 +94,7 @@ static int microdvd_read_header(AVFormatContext *s) int64_t pos = avio_tell(s->pb); int len = ff_get_line(s->pb, line_buf, sizeof(line_buf)); char *line = line_buf; + int64_t pts; if (!strncmp(line, bom, 3)) line += 3; @@ -134,11 +135,14 @@ static int microdvd_read_header(AVFormatContext *s) SKIP_FRAME_ID; if (!*p) continue; + pts = get_pts(line); + if (pts == AV_NOPTS_VALUE) + continue; sub = ff_subtitles_queue_insert(µdvd->q, p, strlen(p), 0); if (!sub) return AVERROR(ENOMEM); sub->pos = pos; - sub->pts = get_pts(line); + sub->pts = pts; sub->duration = get_duration(line); } ff_subtitles_queue_finalize(s, µdvd->q); |