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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-10-04 17:10:38 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-07-01 12:49:26 +0200 |
| commit | 1b7c5197ab4aad8ba325a73d94f77a65bd623760 (patch) | |
| tree | 55abe480f17eea27afa742127eb899203c296499 | |
| parent | da5941248e82d73651a0b25b4086738dadbf3d43 (diff) | |
| download | ffmpeg-1b7c5197ab4aad8ba325a73d94f77a65bd623760.tar.gz | |
avformat/subtitles: Check nb_subs in ff_subtitles_queue_finalize()
Fixes: null pointer dereference
Fixes: 17828/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5645915116797952
Fixes: Ticket8147
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 81b53913bbb97234e22187d1122948c351a3466d)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/subtitles.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavformat/subtitles.c b/libavformat/subtitles.c index 108f909c84..f818b1c1a0 100644 --- a/libavformat/subtitles.c +++ b/libavformat/subtitles.c @@ -194,6 +194,9 @@ void ff_subtitles_queue_finalize(void *log_ctx, FFDemuxSubtitlesQueue *q) { int i; + if (!q->nb_subs) + return; + qsort(q->subs, q->nb_subs, sizeof(*q->subs), q->sort == SUB_SORT_TS_POS ? cmp_pkt_sub_ts_pos : cmp_pkt_sub_pos_ts); |