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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-04-16 00:41:54 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-05-09 11:23:13 +0200 |
| commit | 485546eec10a13cbacd17901f02794952d621f20 (patch) | |
| tree | 44953cd714e4f54dc3c3f15b728d4044c6e2cef9 /libavcodec | |
| parent | 3adb15617d5db5fb9b57c64ea0c6a91c57587a0a (diff) | |
| download | ffmpeg-485546eec10a13cbacd17901f02794952d621f20.tar.gz | |
avcodec/jpeg2000: Check stepsize before using it
Fixes: value 1.87633e+10 is outside the range of representable values of type 'int'
Fixes: Undefined behavior
Fixes: 14246/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEG2000_fuzzer-5758393601490944
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 06ef186fa1b7329c6fe6723372a72464c998059b)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/jpeg2000.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libavcodec/jpeg2000.c b/libavcodec/jpeg2000.c index afeb9df27c..afffaa7203 100644 --- a/libavcodec/jpeg2000.c +++ b/libavcodec/jpeg2000.c @@ -247,6 +247,11 @@ static void init_band_stepsize(AVCodecContext *avctx, } } + if (band->f_stepsize > (INT_MAX >> 15)) { + band->f_stepsize = 0; + av_log(avctx, AV_LOG_ERROR, "stepsize out of range\n"); + } + band->i_stepsize = band->f_stepsize * (1 << 15); /* FIXME: In OpenJPEG code stepsize = stepsize * 0.5. Why? |