From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 4/5] avcodec/apedec: fix integer overflow in 8bit samples
Date: Thu, 23 Dec 2021 22:15:26 +0100
Message-ID: <20211223211527.20408-4-michael@niedermayer.cc> (raw)
In-Reply-To: <20211223211527.20408-1-michael@niedermayer.cc>
Fixes: signed integer overflow: 2147483542 + 128 cannot be represented in type 'int'
Fixes: 42812/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APE_fuzzer-6344057861832704
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 35a2e617e69..b932263012e 100644
--- a/libavcodec/apedec.c
+++ b/libavcodec/apedec.c
@@ -1587,7 +1587,7 @@ static int ape_decode_frame(AVCodecContext *avctx, void *data,
for (ch = 0; ch < s->channels; ch++) {
sample8 = (uint8_t *)frame->data[ch];
for (i = 0; i < blockstodecode; i++)
- *sample8++ = (s->decoded[ch][i] + 0x80) & 0xff;
+ *sample8++ = (s->decoded[ch][i] + 0x80U) & 0xff;
}
break;
case 16:
--
2.17.1
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next prev parent reply other threads:[~2021-12-23 21:17 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-23 21:15 [FFmpeg-devel] [PATCH 1/5] avcodec/targa: Check input size for uncompressed TGA before allocation Michael Niedermayer
2021-12-23 21:15 ` [FFmpeg-devel] [PATCH 2/5] avcodec/cdgraphics: avoid signed overflow in alpha Michael Niedermayer
2021-12-23 21:45 ` Andreas Rheinhardt
2021-12-25 10:43 ` Michael Niedermayer
2021-12-23 21:15 ` [FFmpeg-devel] [PATCH 3/5] avformat/flvdec: timestamps cannot use the full int64 range Michael Niedermayer
2021-12-30 20:44 ` Michael Niedermayer
2021-12-23 21:15 ` Michael Niedermayer [this message]
2021-12-30 20:42 ` [FFmpeg-devel] [PATCH 4/5] avcodec/apedec: fix integer overflow in 8bit samples Michael Niedermayer
2021-12-23 21:15 ` [FFmpeg-devel] [PATCH 5/5] avformat/mvdec: Check bytes_per_sample Michael Niedermayer
2021-12-23 23:07 ` Peter Ross
2021-12-24 3:32 ` John-Paul Stewart
2021-12-24 16:58 ` Michael Niedermayer
2021-12-24 20:29 ` John-Paul Stewart
2021-12-25 10:43 ` Michael Niedermayer
2021-12-30 21:11 ` [FFmpeg-devel] [PATCH 1/5] avcodec/targa: Check input size for uncompressed TGA before allocation Michael Niedermayer
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