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Code Issues Releases Activity

avformat/iff: Check data_size

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Fixes: infinite loop
Fixes: 27834/clusterfuzz-testcase-minimized-ffmpeg_dem_IFF_fuzzer-5694930919620608

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 001bc594d82f3df67a6e96c6ea022f4e39002385)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-12-11 00:49:23 +01:00
parent 9a032dfd5f
commit 3e83476a6e
1 changed files with 1 additions and 1 deletions
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2
libavformat/iff.c
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@ -368,7 +368,7 @@ static int read_dst_frame(AVFormatContext *s, AVPacket *pkt)
data_size = iff->is_64bit ? avio_rb64(pb) : avio_rb32(pb);
data_pos = avio_tell(pb);
if (data_size < 1)
if (data_size < 1 || data_size >= INT64_MAX)
return AVERROR_INVALIDDATA;
switch (chunk_id) {