From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 5/5] avcodec/sonic: avoid integer overflow on quantization parameter
Date: Fri, 13 Jan 2023 01:01:38 +0100
Message-ID: <20230113000138.9994-5-michael@niedermayer.cc> (raw)
In-Reply-To: <20230113000138.9994-1-michael@niedermayer.cc>
Fixes: signed integer overflow: -1094995529 * 16 cannot be represented in type 'int'
Fixes: 48567/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SONIC_fuzzer-6681622236233728
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavcodec/sonic.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/sonic.c b/libavcodec/sonic.c
index 77bdb418a7..95ac2b1a96 100644
--- a/libavcodec/sonic.c
+++ b/libavcodec/sonic.c
@@ -1013,7 +1013,7 @@ static int sonic_decode_frame(AVCodecContext *avctx, AVFrame *frame,
if (s->lossless)
quant = 1;
else
- quant = get_symbol(&c, state, 0) * SAMPLE_FACTOR;
+ quant = get_symbol(&c, state, 0) * (unsigned)SAMPLE_FACTOR;
// av_log(NULL, AV_LOG_INFO, "quant: %d\n", quant);
--
2.17.1
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next prev parent reply other threads:[~2023-01-13 0:02 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-13 0:01 [FFmpeg-devel] [PATCH 1/5] avcodec/wbmpdec: use remaining size not whole size Michael Niedermayer
2023-01-13 0:01 ` [FFmpeg-devel] [PATCH 2/5] avcodec/xpmdec: Check size before allocation to avoid truncation Michael Niedermayer
2023-01-13 0:11 ` James Almer
2023-01-13 20:49 ` Michael Niedermayer
2023-01-13 20:53 ` James Almer
2023-01-13 20:56 ` Michael Niedermayer
2023-01-13 0:01 ` [FFmpeg-devel] [PATCH 3/5] avcodec/012v: Order operations for odd size handling Michael Niedermayer
2023-01-16 8:19 ` Paul B Mahol
2023-01-13 0:01 ` [FFmpeg-devel] [PATCH 4/5] avcodec/motionpixels: Mask pixels to valid values Michael Niedermayer
2023-02-23 22:35 ` Michael Niedermayer
2023-01-13 0:01 ` Michael Niedermayer [this message]
2023-01-13 10:15 ` [FFmpeg-devel] [PATCH 5/5] avcodec/sonic: avoid integer overflow on quantization parameter Paul B Mahol
2023-01-15 2:44 ` [FFmpeg-devel] [PATCH 1/5] avcodec/wbmpdec: use remaining size not whole size Peter Ross
2023-01-15 17:12 ` Michael Niedermayer
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