From 0c4137bcb742bccc29f87145615a120bc5988c24 Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Mon, 7 Oct 2019 11:37:05 +0200
Subject: avfilter/af_afftfilt: fix possible invalid memory access

---
 libavfilter/af_afftfilt.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'libavfilter/af_afftfilt.c')

diff --git a/libavfilter/af_afftfilt.c b/libavfilter/af_afftfilt.c
index 86278ef35b..28b4bda8da 100644
--- a/libavfilter/af_afftfilt.c
+++ b/libavfilter/af_afftfilt.c
@@ -188,6 +188,8 @@ static int config_input(AVFilterLink *inlink)
     if (!args)
         return AVERROR(ENOMEM);
 
+    saveptr = NULL;
+    last_expr = "1";
     for (ch = 0; ch < inlink->channels; ch++) {
         char *arg = av_strtok(ch == 0 ? args : NULL, "|", &saveptr);
 
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