[FFmpeg-devel] [PATCH 3/5] avcodec/ffwavesynth: Fix integer overflow with pink_ts_cur/next
Michael Niedermayer
michael at niedermayer.cc
Wed Nov 6 01:22:22 EET 2019
Fixes: signed integer overflow: 6175076100092079360 - -5034989061050195840 cannot be represented in type 'long'
Fixes: 18614/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FFWAVESYNTH_fuzzer-5704508847423488
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
---
libavcodec/ffwavesynth.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/libavcodec/ffwavesynth.c b/libavcodec/ffwavesynth.c
index 3a6a057964..349b45534d 100644
--- a/libavcodec/ffwavesynth.c
+++ b/libavcodec/ffwavesynth.c
@@ -217,8 +217,8 @@ static void wavesynth_seek(struct wavesynth_context *ws, int64_t ts)
*last = -1;
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);
+ uint64_t pink_ts_cur = (ws->cur_ts + PINK_UNIT - 1) & ~(PINK_UNIT - 1);
+ uint64_t pink_ts_next = ts & ~(PINK_UNIT - 1);
int pos = ts & (PINK_UNIT - 1);
lcg_seek(&ws->pink_state, (uint32_t)(pink_ts_next - pink_ts_cur) * 2);
if (pos) {
--
2.23.0
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