commit de05bb25733c3319e18dca44e9b59c6ee389eb26
author Bram Moolenaar <Bram@vim.org> Thu Jan 13 13:08:14 2022 +0000
committer Bram Moolenaar <Bram@vim.org> Thu Jan 13 13:08:14 2022 +0000
tree e2f5ea4506ce6d42ad2cbe89b5e32f3713bed510
parent 54598066ca4cfaf0761aedf47e4ba9844674791e

patch 8.2.4074: going over the end of NameBuff

Problem:    Going over the end of NameBuff.
Solution:   Check length when appending a space.

src/drawscreen.c

diff --git a/src/drawscreen.c b/src/drawscreen.c
index 28a2072..453ca91 100644
--- a/src/drawscreen.c
+++ b/src/drawscreen.c
@@ -462,12 +462,13 @@
 	p = NameBuff;
 	len = (int)STRLEN(p);
 
-	if (bt_help(wp->w_buffer)
+	if ((bt_help(wp->w_buffer)
 #ifdef FEAT_QUICKFIX
-		|| wp->w_p_pvw
+		    || wp->w_p_pvw
 #endif
-		|| bufIsChanged(wp->w_buffer)
-		|| wp->w_buffer->b_p_ro)
+		    || bufIsChanged(wp->w_buffer)
+		    || wp->w_buffer->b_p_ro)
+		&& len < MAXPATHL - 1)
 	    *(p + len++) = ' ';
 	if (bt_help(wp->w_buffer))
 	{