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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-04-25 19:49:14 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-06-18 18:58:25 +0200 |
| commit | e7a990164f67108e99ec5adb8b2d636cd4147715 (patch) | |
| tree | 11e395cba3583bc51e7450af9308406a401a22bb /libavformat/subtitles.c | |
| parent | 8ef25d118246bf443900033fb3588dba628d11b0 (diff) | |
avformat/subtitles: Check pts difference before use
Fixes: signed integer overflow: 0 - -9223372036854775808 cannot be represented in type 'long'
Fixes: 29102/clusterfuzz-testcase-minimized-ffmpeg_dem_MPL2_fuzzer-6747053545881600
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavformat/subtitles.c')
| -rw-r--r-- | libavformat/subtitles.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavformat/subtitles.c b/libavformat/subtitles.c index 05c07cd852..6368ec74f9 100644 --- a/libavformat/subtitles.c +++ b/libavformat/subtitles.c @@ -206,7 +206,7 @@ void ff_subtitles_queue_finalize(void *log_ctx, FFDemuxSubtitlesQueue *q) q->sort == SUB_SORT_TS_POS ? cmp_pkt_sub_ts_pos : cmp_pkt_sub_pos_ts); for (i = 0; i < q->nb_subs; i++) - if (q->subs[i]->duration < 0 && i < q->nb_subs - 1) + if (q->subs[i]->duration < 0 && i < q->nb_subs - 1 && q->subs[i + 1]->pts - (uint64_t)q->subs[i]->pts <= INT64_MAX) q->subs[i]->duration = q->subs[i + 1]->pts - q->subs[i]->pts; if (!q->keep_duplicates) |