[FFmpeg-cvslog] avcodec/ffwavesynth: Fixes invalid shift with pink noise seeking
Michael Niedermayer
git at videolan.org
Thu Aug 15 02:39:04 EEST 2019
ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Sat Aug 10 23:09:45 2019 +0200| [cdea0206efeca83a0a9b57d0764b177b2e11ab7c] | committer: Michael Niedermayer
avcodec/ffwavesynth: Fixes invalid shift with pink noise seeking
Fixes: left shift of negative value -961533698048
Fixes: 16242/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FFWAVESYNTH_fuzzer-5738550670131200
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Nicolas George <george at nsup.org>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=cdea0206efeca83a0a9b57d0764b177b2e11ab7c
---
libavcodec/ffwavesynth.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/ffwavesynth.c b/libavcodec/ffwavesynth.c
index e6d2606c2f..cfd0951d8f 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) << 1);
+ lcg_seek(&ws->pink_state, (pink_ts_next - pink_ts_cur) * 2);
if (pos) {
pink_fill(ws);
ws->pink_pos = pos;
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