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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-10-27 21:51:08 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-09 22:02:19 +0200 |
| commit | 2c45037a256c1f53ef46985819ab37215835605d (patch) | |
| tree | 8795d925509f1aaa3a0ac48ccc2eaa74f470a053 | |
| parent | 7769ab9393e1a8918836da0344a9624ed2eaacb9 (diff) | |
| download | ffmpeg-2c45037a256c1f53ef46985819ab37215835605d.tar.gz | |
avformat/iff: check size against INT64_MAX
Bigger sizes are misinterpreted as negative numbers by the API
Fixes: infinite loop
Fixes: 26611/clusterfuzz-testcase-minimized-ffmpeg_dem_IFF_fuzzer-4890614975692800
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 f291cd681b1235e150464ad83974d60d6879b492)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/iff.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavformat/iff.c b/libavformat/iff.c index d0fc40ff4a..44064600bb 100644 --- a/libavformat/iff.c +++ b/libavformat/iff.c @@ -223,6 +223,9 @@ static int parse_dsd_diin(AVFormatContext *s, AVStream *st, uint64_t eof) uint64_t orig_pos = avio_tell(pb); const char * metadata_tag = NULL; + if (size >= INT64_MAX) + return AVERROR_INVALIDDATA; + switch(tag) { case MKTAG('D','I','A','R'): metadata_tag = "artist"; break; case MKTAG('D','I','T','I'): metadata_tag = "title"; break; |