ffmpeg | branch: release/4.1 | Michael Niedermayer <mich...@niedermayer.cc> | Tue Apr 16 00:41:54 2019 +0200| [3f950b866a839041d587bd5b91d25a35d85408b2] | committer: Michael Niedermayer
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 <mich...@niedermayer.cc> (cherry picked from commit 06ef186fa1b7329c6fe6723372a72464c998059b) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=3f950b866a839041d587bd5b91d25a35d85408b2 --- libavcodec/jpeg2000.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/libavcodec/jpeg2000.c b/libavcodec/jpeg2000.c index 8e90980976..3f50bf9fb3 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? _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".
