terminal: Check bounds of cursor position

Thanks @cproc for the fix.
2013-03-22 15:24:29 +01:00 · 2013-03-22 15:24:29 +01:00 · e1d0839e19
parent c36909e5dc
commit e1d0839e19
1 changed files with 4 additions and 0 deletions
--- a/os/include/terminal/cell_array.h
+++ b/os/include/terminal/cell_array.h
@ -134,6 +134,10 @@ class Cell_array

 		void cursor(Terminal::Position pos, bool enable, bool mark_dirty = false)
 		{
+			if (((unsigned)pos.x >= _num_cols) ||
+			    ((unsigned)pos.y >= _num_lines))
+				return;
+
 			CELL &cell = _array[pos.y][pos.x];

 			if (enable)