From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 1/2] avcodec/apedec: fix a integer overflow in long_filter_high_3800()
Date: Mon, 28 Mar 2022 13:52:50 +0200
Message-ID: <20220328115251.24867-1-michael@niedermayer.cc> (raw)
Fixes: signed integer overflow: -2146549696 - 3923884 cannot be represented in type 'int'
Fixes: 45907/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APE_fuzzer-5992380584558592
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavcodec/apedec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/apedec.c b/libavcodec/apedec.c
index f7f8a88994..65e5d152e0 100644
--- a/libavcodec/apedec.c
+++ b/libavcodec/apedec.c
@@ -959,7 +959,7 @@ static void long_filter_high_3800(int32_t *buffer, int order, int shift, int len
dotprod += delay[j] * (unsigned)coeffs[j];
coeffs[j] += ((delay[j] >> 31) | 1) * sign;
}
- buffer[i] -= dotprod >> shift;
+ buffer[i] -= (unsigned)(dotprod >> shift);
for (j = 0; j < order - 1; j++)
delay[j] = delay[j + 1];
delay[order - 1] = buffer[i];
--
2.17.1
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next 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 Michael Niedermayer [this message]
2022-03-28 11:52 ` [FFmpeg-devel] [PATCH 2/2] avcodec/takdsp: Fix integer overflow in decorrelate_sf() Michael Niedermayer
2022-04-03 21:21 ` [FFmpeg-devel] [PATCH 1/2] avcodec/apedec: fix a integer overflow in long_filter_high_3800() Michael Niedermayer
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