From 3d297038a9ab1f518890491765a4771221a7b0cb Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Thu, 7 Dec 2017 15:32:54 +0100 Subject: [PATCH] avcodec/amrwbdec: Fix division by 0 in voice_factor() The added value matches "Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Extended Adaptive Multi-Rate - Wideband (AMR-WB+) codec; Floating-point ANSI-C code (3GPP TS 26.304 version 14.0.0 Release 14) Extended Adaptive Multi-Rate - Wideband (AMR-WB+) codec; Floating-point ANSI-C code" Fixes: runtime error: division by zero Fixes: 4415/clusterfuzz-testcase-minimized-4677752314658816 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit 1d0817d56b66797118880358ea7d7a2acfdca429) Signed-off-by: Michael Niedermayer --- libavcodec/amrwbdec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/amrwbdec.c b/libavcodec/amrwbdec.c index 57aed874cc..7f2874d35f 100644 --- a/libavcodec/amrwbdec.c +++ b/libavcodec/amrwbdec.c @@ -611,7 +611,7 @@ static float voice_factor(float *p_vector, float p_gain, AMRWB_SFR_SIZE) * f_gain * f_gain; - return (p_ener - f_ener) / (p_ener + f_ener); + return (p_ener - f_ener) / (p_ener + f_ener + 0.01); } /**