[FFmpeg-cvslog] avcodec/ffwavesynth: Fix integer overflow in timestamps

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Thu Sep  5 20:47:04 2019 +0200| [c7ccbf40edb81d40727cca3a7ffd1848d3ed880a] | committer: Michael Niedermayer

avcodec/ffwavesynth: Fix integer overflow in timestamps

Fixes: signed integer overflow: 9223371075321077760 * 2 cannot be represented in type 'long'
Fixes: 16447/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FFWAVESYNTH_fuzzer-5698937431785472

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=c7ccbf40edb81d40727cca3a7ffd1848d3ed880a
---

 libavcodec/ffwavesynth.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/ffwavesynth.c b/libavcodec/ffwavesynth.c
index cfd0951d8f..6736587e32 100644
--- a/libavcodec/ffwavesynth.c
+++ b/libavcodec/ffwavesynth.c
@@ -220,7 +220,7 @@ static void wavesynth_seek(struct wavesynth_context *ws, int64_t ts)
         int64_t pink_ts_cur  = (ws->cur_ts + PINK_UNIT - 1) & ~(PINK_UNIT - 1);
         int64_t pink_ts_next = ts & ~(PINK_UNIT - 1);
         int pos = ts & (PINK_UNIT - 1);
-        lcg_seek(&ws->pink_state, (pink_ts_next - pink_ts_cur) * 2);
+        lcg_seek(&ws->pink_state, (uint32_t)(pink_ts_next - pink_ts_cur) * 2);
         if (pos) {
             pink_fill(ws);
             ws->pink_pos = pos;