avfilter/af_afftfilt: fix possible invalid memory access

5 years ago · 0c4137bcb7
parent 5b4010e886
commit 0c4137bcb7
1 changed files with 2 additions and 0 deletions
--- 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);