From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 2/2] avcodec/takdsp: Fix integer overflow in decorrelate_sf()
Date: Mon, 28 Mar 2022 13:52:51 +0200
Message-ID: <20220328115251.24867-2-michael@niedermayer.cc> (raw)
In-Reply-To: <20220328115251.24867-1-michael@niedermayer.cc>
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@niedermayer.cc>
---
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;
}
}
--
2.17.1
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next prev parent reply other threads:[~2022-03-28 11:53 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-28 11:52 [FFmpeg-devel] [PATCH 1/2] avcodec/apedec: fix a integer overflow in long_filter_high_3800() Michael Niedermayer
2022-03-28 11:52 ` Michael Niedermayer [this message]
2022-04-03 21:21 ` Michael Niedermayer
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