avfilter/af_afftfilt: fix possible invalid memory access

0c4137bc · Paul B Mahol · 5b4010e8 · 0c4137bc
Commit 0c4137bc authored Oct 07, 2019 by Paul B Mahol
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af_afftfilt.c libavfilter/af_afftfilt.c +2 -0

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--- 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);