Message ID | 20210425194014.957-1-michael@niedermayer.cc |
---|---|
State | Accepted |
Commit | e7a990164f67108e99ec5adb8b2d636cd4147715 |
Headers | show |
Series | [FFmpeg-devel,1/6] avformat/subtitles: Check pts difference before use | expand |
Context | Check | Description |
---|---|---|
andriy/x86_make | success | Make finished |
andriy/x86_make_fate | success | Make fate finished |
andriy/PPC64_make | success | Make finished |
andriy/PPC64_make_fate | success | Make fate finished |
On Sun, Apr 25, 2021 at 09:40:09PM +0200, Michael Niedermayer wrote: > 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> > --- > libavformat/subtitles.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) will apply patchset [...]
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)
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> --- libavformat/subtitles.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)