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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-02-15 20:52:17 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-10 16:04:26 +0200 |
| commit | 3a8911ec09afb182b830f806b92209a40e5c36a3 (patch) | |
| tree | f4192a56b274cf050cb130fc7dd67665a2d7b344 | |
| parent | 4df5e76723febd0363ed47f662323945cf6648ea (diff) | |
| download | ffmpeg-3a8911ec09afb182b830f806b92209a40e5c36a3.tar.gz | |
avformat/rmdec: Check codec_length without overflow
Fixes: signed integer overflow: 2147483647 + 64 cannot be represented in type 'int'
Fixes: 30333/clusterfuzz-testcase-minimized-ffmpeg_dem_RM_fuzzer-5175286983426048
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 d558c9f2375fd2136d20422cb1119cfbf872abeb)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/rmdec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavformat/rmdec.c b/libavformat/rmdec.c index 9297914eda..5dfbc4a0ef 100644 --- a/libavformat/rmdec.c +++ b/libavformat/rmdec.c @@ -222,7 +222,7 @@ static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb, if (version == 5) avio_r8(pb); codecdata_length = avio_rb32(pb); - if(codecdata_length + AV_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){ + if((unsigned)codecdata_length > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE){ av_log(s, AV_LOG_ERROR, "codecdata_length too large\n"); return -1; } |