From 006a529db11bb7050e0c925f7c76b2ff5023655a Mon Sep 17 00:00:00 2001
From: nicm <nicm>
Date: Mon, 30 May 2022 13:04:24 +0000
Subject: [PATCH] Check if args_strtonum argument is NULL or not a string, from
 Anindya Mukherjee.

---
 arguments.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arguments.c b/arguments.c
index 37cd0236..c94a3a29 100644
--- a/arguments.c
+++ b/arguments.c
@@ -831,6 +831,12 @@ args_strtonum(struct args *args, u_char flag, long long minval,
 		return (0);
 	}
 	value = TAILQ_LAST(&entry->values, args_values);
+	if (value == NULL ||
+	    value->type != ARGS_STRING ||
+	    value->string == NULL) {
+		*cause = xstrdup("missing");
+		return (0);
+	}
 
 	ll = strtonum(value->string, minval, maxval, &errstr);
 	if (errstr != NULL) {