[FFmpeg-cvslog] avcodec/takdsp: Fix integer overflow in decorrelate_sf()
Michael Niedermayer
git at videolan.org
Wed Apr 6 22:56:40 EEST 2022
ffmpeg | branch: release/4.3 | Michael Niedermayer <michael at niedermayer.cc> | Mon Mar 28 00:26:06 2022 +0200| [5359c1ceda217b1bcb5b8579873a1107f211528f] | committer: Michael Niedermayer
avcodec/takdsp: Fix integer overflow in decorrelate_sf()
Fixes: signed integer overflow: -101 * 71041254 cannot be represented in type 'int'
Fixes: 45938/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TAK_fuzzer-4687974320701440
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 01d8c887f63bcb1f870034ed441504b3daffc645)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=5359c1ceda217b1bcb5b8579873a1107f211528f
---
libavcodec/takdsp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/takdsp.c b/libavcodec/takdsp.c
index 9cb8052596..a8f9dba342 100644
--- a/libavcodec/takdsp.c
+++ b/libavcodec/takdsp.c
@@ -65,7 +65,7 @@ static void decorrelate_sf(int32_t *p1, int32_t *p2, int length, int dshift, int
for (i = 0; i < length; i++) {
int32_t a = p1[i];
int32_t b = p2[i];
- b = (unsigned)(dfactor * (b >> dshift) + 128 >> 8) << dshift;
+ b = (unsigned)((int)(dfactor * (unsigned)(b >> dshift) + 128) >> 8) << dshift;
p1[i] = b - a;
}
}
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