[FFmpeg-devel,2/3] avcodec/ffwavesynth: More correct cast in wavesynth_seek()

Submitted by Michael Niedermayer on July 14, 2019, 10:35 p.m.

Details

Message ID 20190714223549.25904-2-michael@niedermayer.cc
State Accepted
Commit f4605770af712dd9d7b0136fe298f8aa52101011
Headers show

Commit Message

Michael Niedermayer July 14, 2019, 10:35 p.m.
Fixes: signed integer overflow: 553590816 - -9223372036315799520 cannot be represented in type 'long'
Fixes: 15743/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FFWAVESYNTH_fuzzer-5705835377852416

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavcodec/ffwavesynth.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch hide | download patch | download mbox

diff --git a/libavcodec/ffwavesynth.c b/libavcodec/ffwavesynth.c
index 1dbfaa5847..94a843e3ca 100644
--- a/libavcodec/ffwavesynth.c
+++ b/libavcodec/ffwavesynth.c
@@ -215,7 +215,7 @@  static void wavesynth_seek(struct wavesynth_context *ws, int64_t ts)
     ws->next_inter = i;
     ws->next_ts = i < ws->nb_inter ? ws->inter[i].ts_start : INF_TS;
     *last = -1;
-    lcg_seek(&ws->dither_state, (uint32_t)ts - ws->cur_ts);
+    lcg_seek(&ws->dither_state, (uint32_t)ts - (uint32_t)ws->cur_ts);
     if (ws->pink_need) {
         int64_t pink_ts_cur  = (ws->cur_ts + PINK_UNIT - 1) & ~(PINK_UNIT - 1);
         int64_t pink_ts_next = ts & ~(PINK_UNIT - 1);