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authorMichael Niedermayer <michael@niedermayer.cc>2020-10-31 13:51:47 +0100
committerMichael Niedermayer <michael@niedermayer.cc>2020-11-04 23:38:36 +0100
commit442d53f409c8d84c7db120227caac00af54aa884 (patch)
tree00a5c391022334d67f7f4b0f1e4bc6595b9bc892
parentf291cd681b1235e150464ad83974d60d6879b492 (diff)
downloadffmpeg-442d53f409c8d84c7db120227caac00af54aa884.tar.gz
avformat/bintext: Check width in idf_read_header()
Fixes: division by 0 Fixes: 26802/clusterfuzz-testcase-minimized-ffmpeg_dem_IDF_fuzzer-5180591554953216.fuzz Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
-rw-r--r--libavformat/bintext.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/libavformat/bintext.c b/libavformat/bintext.c
index 7dab5f377d..144b4172af 100644
--- a/libavformat/bintext.c
+++ b/libavformat/bintext.c
@@ -344,6 +344,8 @@ static int idf_read_header(AVFormatContext *s)
bin->fsize = avio_size(pb) - 12 - 4096 - 48;
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, 12, SEEK_SET);