[FFmpeg-cvslog] avformat/nutdec: Check get_packetheader() in mainheader
Michael Niedermayer
git at videolan.org
Thu Sep 1 18:15:33 EEST 2022
ffmpeg | branch: release/5.0 | Michael Niedermayer <michael at niedermayer.cc> | Wed Jul 6 23:54:49 2022 +0200| [c39b1d310afb6633a8af7c70c3976b44383bcb72] | committer: Michael Niedermayer
avformat/nutdec: Check get_packetheader() in mainheader
Fixes; Timeout
Fixes: 48794/clusterfuzz-testcase-minimized-ffmpeg_dem_NUT_fuzzer-6524604713140224
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit b5de084aa63b79586bc445e6a7fea837688b3941)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=c39b1d310afb6633a8af7c70c3976b44383bcb72
---
libavformat/nutdec.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/libavformat/nutdec.c b/libavformat/nutdec.c
index 0a8a700acf..c6b9db5cb3 100644
--- a/libavformat/nutdec.c
+++ b/libavformat/nutdec.c
@@ -199,6 +199,8 @@ static int decode_main_header(NUTContext *nut)
int tmp_stream, tmp_mul, tmp_pts, tmp_size, tmp_res, tmp_head_idx;
length = get_packetheader(nut, bc, 1, MAIN_STARTCODE);
+ if (length == (uint64_t)-1)
+ return AVERROR_INVALIDDATA;
end = length + avio_tell(bc);
nut->version = ffio_read_varlen(bc);
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