thac0/vim
1
0
Fork 0
forked from aniani/vim
Code Activity

patch 9.0.2107: [security]: FPE in adjust_plines_for_skipcol

Browse Source 
Problem:  [security]: FPE in adjust_plines_for_skipcol
Solution: don't divide by zero, return zero

Prevent a floating point exception when calculating w_skipcol (which can
happen with a small window when the number option is set and cpo+=n).

Add a test to verify

Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
Christian Brabandt
2023-11-14 20:05:59 +01:00
parent 25aabc2b8e
commit cb0b99f067
3 changed files with 24 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
src/move.c
View File

@@ -45,8 +45,9 @@ adjust_plines_for_skipcol(win_T *wp)
return 0;
int width = wp->w_width - win_col_off(wp);
if (wp->w_skipcol >= width)
return (wp->w_skipcol - width) / (width + win_col_off2(wp)) + 1;
int w2 = width + win_col_off2(wp);
if (wp->w_skipcol >= width && w2 > 0)
return (wp->w_skipcol - width) / w2 + 1;
return 0;
}