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diff src/userfunc.c @ 22496:454b78ca8247 v8.2.1796

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patch 8.2.1796: Vim9: invalid memory access with weird function name Commit: https://github.com/vim/vim/commit/7b5d5442696d86daab062592d5c86c829757c352 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Oct 4 13:42:34 2020 +0200 patch 8.2.1796: Vim9: invalid memory access with weird function name Problem: Vim9: invalid memory access with weird function name. (Dhiraj Mishra) Solution: Check the name is valid. Add a test.
author Bram Moolenaar <Bram@vim.org>
date Sun, 04 Oct 2020 13:45:04 +0200
parents 1cefe1c013ac
children 107eae953b87
line wrap: on
line diff
--- a/src/userfunc.c
+++ b/src/userfunc.c
@@ -2374,6 +2374,7 @@ trans_function_name(
     int		extra = 0;
     lval_T	lv;
     int		vim9script;
+    static char *e_function_name = N_("E129: Function name required");
 
     if (fdp != NULL)
 	CLEAR_POINTER(fdp);
@@ -2401,7 +2402,7 @@ trans_function_name(
     if (end == start)
     {
 	if (!skip)
-	    emsg(_("E129: Function name required"));
+	    emsg(_(e_function_name));
 	goto theend;
     }
     if (end == NULL || (lv.ll_tv != NULL && (lead > 2 || lv.ll_range)))
@@ -2517,6 +2518,12 @@ trans_function_name(
 	}
 	len = (int)(end - lv.ll_name);
     }
+    if (len <= 0)
+    {
+	if (!skip)
+	    emsg(_(e_function_name));
+	goto theend;
+    }
 
     // In Vim9 script a user function is script-local by default.
     vim9script = ASCII_ISUPPER(*start) && in_vim9script();