71 lines
2.0 KiB
Diff
71 lines
2.0 KiB
Diff
From 826bfe4bbd7594188e3d74d2539d9707b1c6a14b Mon Sep 17 00:00:00 2001
|
|
From: Bram Moolenaar <Bram@vim.org>
|
|
Date: Fri, 8 Oct 2021 18:39:28 +0100
|
|
Subject: [PATCH] patch 8.2.3487: illegal memory access if buffer name is very
|
|
long
|
|
|
|
Problem: Illegal memory access if buffer name is very long.
|
|
Solution: Make sure not to go over the end of the buffer.
|
|
---
|
|
src/drawscreen.c | 10 +++++-----
|
|
src/testdir/test_statusline.vim | 10 ++++++++++
|
|
2 files changed, 15 insertions(+), 5 deletions(-)
|
|
|
|
diff --git a/src/drawscreen.c b/src/drawscreen.c
|
|
index 3a88ee9..9acb705 100644
|
|
--- a/src/drawscreen.c
|
|
+++ b/src/drawscreen.c
|
|
@@ -446,13 +446,13 @@ win_redr_status(win_T *wp, int ignore_pum UNUSED)
|
|
*(p + len++) = ' ';
|
|
if (bt_help(wp->w_buffer))
|
|
{
|
|
- STRCPY(p + len, _("[Help]"));
|
|
+ vim_snprintf((char *)p + len, MAXPATHL - len, "%s", _("[Help]"));
|
|
len += (int)STRLEN(p + len);
|
|
}
|
|
#ifdef FEAT_QUICKFIX
|
|
if (wp->w_p_pvw)
|
|
{
|
|
- STRCPY(p + len, _("[Preview]"));
|
|
+ vim_snprintf((char *)p + len, MAXPATHL - len, "%s", _("[Preview]"));
|
|
len += (int)STRLEN(p + len);
|
|
}
|
|
#endif
|
|
@@ -462,12 +462,12 @@ win_redr_status(win_T *wp, int ignore_pum UNUSED)
|
|
#endif
|
|
)
|
|
{
|
|
- STRCPY(p + len, "[+]");
|
|
- len += 3;
|
|
+ vim_snprintf((char *)p + len, MAXPATHL - len, "%s", "[+]");
|
|
+ len += (int)STRLEN(p + len);
|
|
}
|
|
if (wp->w_buffer->b_p_ro)
|
|
{
|
|
- STRCPY(p + len, _("[RO]"));
|
|
+ vim_snprintf((char *)p + len, MAXPATHL - len, "%s", _("[RO]"));
|
|
len += (int)STRLEN(p + len);
|
|
}
|
|
|
|
diff --git a/src/testdir/test_statusline.vim b/src/testdir/test_statusline.vim
|
|
index 1f705b8..febb5d6 100644
|
|
--- a/src/testdir/test_statusline.vim
|
|
+++ b/src/testdir/test_statusline.vim
|
|
@@ -393,3 +393,13 @@ func Test_statusline_visual()
|
|
bwipe! x1
|
|
bwipe! x2
|
|
endfunc
|
|
+
|
|
+" Used to write beyond allocated memory. This assumes MAXPATHL is 4096 bytes.
|
|
+func Test_statusline_verylong_filename()
|
|
+ let fname = repeat('x', 4090)
|
|
+ exe "new " .. fname
|
|
+ set buftype=help
|
|
+ set previewwindow
|
|
+ redraw
|
|
+ bwipe!
|
|
+endfunc
|
|
--
|
|
2.27.0
|
|
|