[FFmpeg-cvslog] avcodec/aacdec_fixed: Fix undefined shift
Michael Niedermayer
git at videolan.org
Sat Dec 2 01:49:39 EET 2017
ffmpeg | branch: release/3.0 | Michael Niedermayer <michael at niedermayer.cc> | Sun Nov 5 21:20:07 2017 +0100| [43299eabeabc61c6a5b56f85f0901591bd8fb205] | committer: Michael Niedermayer
avcodec/aacdec_fixed: Fix undefined shift
Fixes: runtime error: left shift of negative value -801112064
Fixes: 3492/clusterfuzz-testcase-minimized-5784775283441664
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit fca198fb5bf42ba6b765b3f75b11738e4b4fc2a9)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=43299eabeabc61c6a5b56f85f0901591bd8fb205
---
libavcodec/aacdec_fixed.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/aacdec_fixed.c b/libavcodec/aacdec_fixed.c
index d6959b8ac2..535b323fc0 100644
--- a/libavcodec/aacdec_fixed.c
+++ b/libavcodec/aacdec_fixed.c
@@ -309,7 +309,7 @@ static av_always_inline void predict(PredictorState *ps, int *coef,
if (shift > 0) {
*coef += (unsigned)((pv.mant + (1 << (shift - 1))) >> shift);
} else
- *coef += (unsigned)(pv.mant << -shift);
+ *coef += (unsigned)pv.mant << -shift;
}
}
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