ffmpeg | branch: release/3.4 | Michael Niedermayer <mich...@niedermayer.cc> | Sat Nov 2 15:52:52 2019 +0100| [978aa2ae50877e8575d6f5061787f836dd2227d4] | committer: Michael Niedermayer
avcodec/ralf: use multiply instead of shift to avoid undefined behavior in decode_block() Fixes: left shift of negative value -249 Fixes: 18566/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_RALF_fuzzer-5649394561187840 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 1b7d02642b2096622cee6165fea1301bb9ad54ff) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=978aa2ae50877e8575d6f5061787f836dd2227d4 --- libavcodec/ralf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/ralf.c b/libavcodec/ralf.c index 1d881cf7ae..ca8817aa21 100644 --- a/libavcodec/ralf.c +++ b/libavcodec/ralf.c @@ -408,7 +408,7 @@ static int decode_block(AVCodecContext *avctx, GetBitContext *gb, case 4: for (i = 0; i < len; i++) { t = ch1[i] + ctx->bias[1]; - t2 = ((ch0[i] + ctx->bias[0]) << 1) | (t & 1); + t2 = ((ch0[i] + ctx->bias[0]) * 2) | (t & 1); dst0[i] = (t2 + t) / 2; dst1[i] = (t2 - t) / 2; } _______________________________________________ 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".
