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avformat/subviewerdec: fail on AV_NOPTS_VALUE 

Such values are not supported by ff_subtitles_queue*

Fixes: signed integer overflow: 10 - -9223372036854775808 cannot be represented in type 'long'
Fixes: 24193/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5714901855895552

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-07-19 17:13:10 +02:00
parent 0c90377a40
commit b7f51428b1
1 changed files with 4 additions and 0 deletions
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4
libavformat/subviewerdec.c
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@ -148,6 +148,10 @@ static int subviewer_read_header(AVFormatContext *s)
new_event = 1; new_event = 1;
pos = avio_tell(s->pb); pos = avio_tell(s->pb);
} else if (*line) { } else if (*line) {
if (pts_start == AV_NOPTS_VALUE) {
res = AVERROR_INVALIDDATA;
goto end;
}
if (!new_event) { if (!new_event) {
sub = ff_subtitles_queue_insert(&subviewer->q, "\n", 1, 1); sub = ff_subtitles_queue_insert(&subviewer->q, "\n", 1, 1);
if (!sub) { if (!sub) {