From 85b6747abc15a7a81086db31289cf1b8b17e6cb1 Mon Sep 17 00:00:00 2001
From: Bram Moolenaar <Bram@vim.org>
Date: Tue, 25 Jan 2022 11:55:02 +0000
Subject: [PATCH] patch 8.2.4214: illegal memory access with large 'tabstop' in
 Ex mode

Problem:    Illegal memory access with large 'tabstop' in Ex mode.
Solution:   Allocate enough memory.
---
 src/ex_getln.c               |  2 +-
 src/testdir/test_ex_mode.vim | 10 ++++++++++
 src/version.c                |  2 ++
 3 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/ex_getln.c b/src/ex_getln.c
index 5dc43d845..097b97eeb 100644
--- a/src/ex_getln.c
+++ b/src/ex_getln.c
@@ -1513,7 +1513,7 @@ init_ccline(int firstc, int indent)
     ccline.cmdindent = (firstc > 0 ? indent : 0);
 
     // alloc initial ccline.cmdbuff
-    alloc_cmdbuff(exmode_active ? 250 : indent + 1);
+    alloc_cmdbuff(indent + 50);
     if (ccline.cmdbuff == NULL)
 	return FAIL;
     ccline.cmdlen = ccline.cmdpos = 0;
diff --git a/src/testdir/test_ex_mode.vim b/src/testdir/test_ex_mode.vim
index 7031115fc..2642a16d2 100644
--- a/src/testdir/test_ex_mode.vim
+++ b/src/testdir/test_ex_mode.vim
@@ -241,4 +241,14 @@ func Test_ex_mode_count_overflow()
   call delete('Xexmodescript')
 endfunc
 
+func Test_ex_mode_large_indent()
+  new
+  set ts=500 ai
+  call setline(1, "\t")
+  exe "normal gQi\<CR>."
+  set ts=8 noai
+  bwipe!
+endfunc
+
+
 " vim: shiftwidth=2 sts=2 expandtab
-- 
2.34.1