[FFmpeg-devel] [PATCH 1/5] avcodec/dpx: Check bits_per_color earlier
Michael Niedermayer
michael at niedermayer.cc
Tue Apr 13 18:45:35 EEST 2021
Fixes: shift exponent 251 is too large for 32-bit type 'int'
Fixes: 32147/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DPX_fuzzer-5519111675314176
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
---
libavcodec/dpx.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/libavcodec/dpx.c b/libavcodec/dpx.c
index 5372e3d586..b02996f04c 100644
--- a/libavcodec/dpx.c
+++ b/libavcodec/dpx.c
@@ -242,6 +242,9 @@ static int decode_frame(AVCodecContext *avctx,
return AVERROR_PATCHWELCOME;
}
+ if (bits_per_color > 32)
+ return AVERROR_INVALIDDATA;
+
buf += 820;
avctx->sample_aspect_ratio.num = read32(&buf, endian);
avctx->sample_aspect_ratio.den = read32(&buf, endian);
--
2.17.1
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