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| author | Paul B Mahol <onemda@gmail.com> | 2019-09-25 17:18:32 +0200 |
|---|---|---|
| committer | Paul B Mahol <onemda@gmail.com> | 2019-09-29 21:05:35 +0200 |
| commit | f1e17eb446577180ee9976730aacb46563766518 (patch) | |
| tree | 827b06c63750067c4aaedb27f4685365e905ed7f | |
| parent | 4a51075f4db17ce5a6fcad7548bb5cf60511d3f0 (diff) | |
| download | ffmpeg-f1e17eb446577180ee9976730aacb46563766518.tar.gz | |
avcodec/qtrleenc: fix undefined behaviour
Fixes #7991.
| -rw-r--r-- | libavcodec/qtrleenc.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/libavcodec/qtrleenc.c b/libavcodec/qtrleenc.c index cdd864bf82..6669c1302f 100644 --- a/libavcodec/qtrleenc.c +++ b/libavcodec/qtrleenc.c @@ -259,9 +259,10 @@ static void qtrle_encode_line(QtrleEncContext *s, const AVFrame *p, int line, ui /* These bulk costs increase every iteration */ lowest_bulk_cost += s->pixel_size; sec_lowest_bulk_cost += s->pixel_size; - - this_line -= s->pixel_size; - prev_line -= s->pixel_size; + if (this_line >= p->data[0] + s->pixel_size) + this_line -= s->pixel_size; + if (prev_line >= s->previous_frame->data[0] + s->pixel_size) + prev_line -= s->pixel_size; } /* Good! Now we have the best sequence for this line, let's output it. */ |