From 5cefe5d304cf6f717f8ab07c8a6b4311c6f35351 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Wed, 6 Jul 2022 23:54:49 +0200 Subject: 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 (cherry picked from commit b5de084aa63b79586bc445e6a7fea837688b3941) Signed-off-by: Michael Niedermayer --- libavformat/nutdec.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavformat/nutdec.c b/libavformat/nutdec.c index e86d8222d0..0b04aaad3e 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); -- cgit v1.2.1