From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 4/5] avcodec/motionpixels: Mask pixels to valid values
Date: Fri, 13 Jan 2023 01:01:37 +0100
Message-ID: <20230113000138.9994-4-michael@niedermayer.cc> (raw)
In-Reply-To: <20230113000138.9994-1-michael@niedermayer.cc>
Fixes: out of array access
Fixes: 48567/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MOTIONPIXELS_fuzzer-6724203352555520
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavcodec/motionpixels.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/motionpixels.c b/libavcodec/motionpixels.c
index 4141c5a495..a947ca05de 100644
--- a/libavcodec/motionpixels.c
+++ b/libavcodec/motionpixels.c
@@ -185,7 +185,7 @@ static YuvPixel mp_get_yuv_from_rgb(MotionPixelsContext *mp, int x, int y)
int color;
color = *(uint16_t *)&mp->frame->data[0][y * mp->frame->linesize[0] + x * 2];
- return mp_rgb_yuv_table[color];
+ return mp_rgb_yuv_table[color & 0x7FFF];
}
static void mp_set_rgb_from_yuv(MotionPixelsContext *mp, int x, int y, const YuvPixel *p)
--
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 ` Michael Niedermayer [this message]
2023-02-23 22:35 ` [FFmpeg-devel] [PATCH 4/5] avcodec/motionpixels: Mask pixels to valid values Michael Niedermayer
2023-01-13 0:01 ` [FFmpeg-devel] [PATCH 5/5] avcodec/sonic: avoid integer overflow on quantization parameter Michael Niedermayer
2023-01-13 10:15 ` 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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