avcodec/amrwbdec: Fix division by 0 in voice_factor()
authorMichael Niedermayer <michael@niedermayer.cc>
Thu, 7 Dec 2017 14:32:54 +0000 (15:32 +0100)
committerMichael Niedermayer <michael@niedermayer.cc>
Mon, 8 Jan 2018 22:19:14 +0000 (23:19 +0100)
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 <michael@niedermayer.cc>
(cherry picked from commit 1d0817d56b66797118880358ea7d7a2acfdca429)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
libavcodec/amrwbdec.c

index 57aed87..7f2874d 100644 (file)
@@ -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);
 }
 
 /**