ffmpeg | branch: release/4.1 | Michael Niedermayer <mich...@niedermayer.cc> | Thu Jun 20 19:09:11 2019 +0200| [9ede5cab3afae1473a63f148b15af9d88809e646] | committer: Michael Niedermayer
avcodec/alsdec: Fix invalid shift in multiply() Fixes: shift exponent -24 is negative Fixes: 15292/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ALS_fuzzer-5768533318828032 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 f30be1ec9856551d96f3876eec5f8b8abf456b81) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=9ede5cab3afae1473a63f148b15af9d88809e646 --- libavcodec/alsdec.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavcodec/alsdec.c b/libavcodec/alsdec.c index ca8701e6d0..891f742e7e 100644 --- a/libavcodec/alsdec.c +++ b/libavcodec/alsdec.c @@ -1379,6 +1379,9 @@ static SoftFloat_IEEE754 multiply(SoftFloat_IEEE754 a, SoftFloat_IEEE754 b) { mantissa_temp = (uint64_t)a.mant * (uint64_t)b.mant; mask_64 = (uint64_t)0x1 << 47; + if (!mantissa_temp) + return FLOAT_0; + // Count the valid bit count while (!(mantissa_temp & mask_64) && mask_64) { bit_count--; _______________________________________________ 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".
