From fca198fb5bf42ba6b765b3f75b11738e4b4fc2a9 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 5 Nov 2017 21:20:07 +0100 Subject: [PATCH] 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 --- 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 ffd577c789..f96999efb4 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; } }