From 87ec4e09b8746cf77aa3bbb8cbc23b51925dfc78 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 31 Oct 2020 13:51:47 +0100 Subject: [PATCH] avformat/bintext: Check width Fixes: division by 0 Fixes: 26780/clusterfuzz-testcase-minimized-ffmpeg_dem_ADF_fuzzer-5117945027756032 Fixes: 26998/clusterfuzz-testcase-minimized-ffmpeg_dem_ADF_fuzzer-5119352359354368 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit f6dc285fb5f30406b275b968ee438a738da799d1) Signed-off-by: Michael Niedermayer --- libavformat/bintext.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavformat/bintext.c b/libavformat/bintext.c index 144b4172af..bc0f6bd099 100644 --- a/libavformat/bintext.c +++ b/libavformat/bintext.c @@ -293,6 +293,8 @@ static int adf_read_header(AVFormatContext *s) bin->fsize = avio_size(pb) - 1 - 192 - 4096; st->codecpar->width = 80<<3; ff_sauce_read(s, &bin->fsize, &got_width, 0); + if (st->codecpar->width < 8) + return AVERROR_INVALIDDATA; if (!bin->width) calculate_height(st->codecpar, bin->fsize); avio_seek(pb, 1 + 192 + 4096, SEEK_SET);