ffmpeg | branch: master | Michael Niedermayer <mich...@niedermayer.cc> | Fri Jul 26 17:07:01 2019 +0200| [02346292a334a51f6da802146b782bdb01ae9b4e] | committer: Michael Niedermayer
avcodec/alsdec: fix mantisse shift Fixes: shift exponent -1 is negative Fixes: 16039/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ALS_fuzzer-5656825657032704 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=02346292a334a51f6da802146b782bdb01ae9b4e --- libavcodec/alsdec.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/libavcodec/alsdec.c b/libavcodec/alsdec.c index d4451482a4..e1449a72a5 100644 --- a/libavcodec/alsdec.c +++ b/libavcodec/alsdec.c @@ -1404,7 +1404,11 @@ static SoftFloat_IEEE754 multiply(SoftFloat_IEEE754 a, SoftFloat_IEEE754 b) { } } - mantissa = (unsigned int)(mantissa_temp >> cutoff_bit_count); + if (cutoff_bit_count >= 0) { + mantissa = (unsigned int)(mantissa_temp >> cutoff_bit_count); + } else { + mantissa = (unsigned int)(mantissa_temp <<-cutoff_bit_count); + } // Need one more shift? if (mantissa & 0x01000000ul) { _______________________________________________ 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".
