From 8af299acde9601e64740b75430960503615873b4 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Tue, 10 Nov 2020 23:01:12 +0100 Subject: avformat/aiffdec: Check size before subtraction in get_aiff_header() Fixes: Infinite loop Fixes: 27235/clusterfuzz-testcase-minimized-ffmpeg_dem_AIFF_fuzzer-5761398380167168 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavformat/aiffdec.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'libavformat/aiffdec.c') diff --git a/libavformat/aiffdec.c b/libavformat/aiffdec.c index 15733478e1..4d1c9bbb53 100644 --- a/libavformat/aiffdec.c +++ b/libavformat/aiffdec.c @@ -120,6 +120,8 @@ static int get_aiff_header(AVFormatContext *s, int size, else sample_rate = (val + (1ULL<<(-exp-1))) >> -exp; par->sample_rate = sample_rate; + if (size < 18) + return AVERROR_INVALIDDATA; size -= 18; /* get codec id for AIFF-C */ -- cgit v1.2.1