[FFmpeg-devel] [PATCH 1/3] avcodec/wmv2dec: Check that the P frame secondary header fit in the input
Michael Niedermayer
michael at niedermayer.cc
Sat Apr 13 02:36:45 EEST 2019
Fixes: Timeout (64sec ->2 sec)
Fixes: 14131/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WMV2_fuzzer-5719879556005888
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/wmv2dec.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/libavcodec/wmv2dec.c b/libavcodec/wmv2dec.c
index 92daa1639e..124dfdb7e0 100644
--- a/libavcodec/wmv2dec.c
+++ b/libavcodec/wmv2dec.c
@@ -230,6 +230,9 @@ int ff_wmv2_decode_secondary_picture_header(MpegEncContext *s)
s->rl_chroma_table_index = s->rl_table_index;
}
+ if (get_bits_left(&s->gb) < 2)
+ return AVERROR_INVALIDDATA;
+
s->dc_table_index = get_bits1(&s->gb);
s->mv_table_index = get_bits1(&s->gb);
--
2.21.0
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