https://bugs.gentoo.org/925560
https://git.savannah.gnu.org/cgit/gcal.git/commit/?id=a9d49b3e6535ebf2b5a0b4051e95bb5dc0c27fdb

From a9d49b3e6535ebf2b5a0b4051e95bb5dc0c27fdb Mon Sep 17 00:00:00 2001
From: Oleg Derevenetz <oleg-derevenetz@yandex.ru>
Date: Sun, 29 Nov 2020 17:42:07 +0100
Subject: src/utils.c: fix segfault

--- a/src/utils.c
+++ b/src/utils.c
@@ -1354,7 +1354,7 @@ month_name (month)
 
 
 	  len = (int) strlen (s) - 1;
-	  mayname = (char *) my_malloc (len,
+	  mayname = (char *) my_malloc (len + 2,
 					ERR_NO_MEMORY_AVAILABLE,
 					__FILE__, ((long) __LINE__) - 2L,
 					"mayname", 0);
-- 
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