Merge tag 'fbdev-for-6.17-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev

Pull fbdev fixes for 6.17-rc1:

 - Revert a patch which broke VGA console

 - Fix an out-of-bounds access bug which may happen during console
   resizing when a console is mapped to a frame buffer

* tag 'fbdev-for-6.17-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev:
  Revert "vgacon: Add check for vc_origin address range in vgacon_scroll()"
  fbdev: Fix vmalloc out-of-bounds write in fast_imageblit

Author: torvalds

drivers/video/console/vgacon.c

@@ -1168,7 +1168,7 @@ static bool vgacon_scroll(struct vc_data *c, unsigned int t, unsigned int b,
 				     c->vc_screenbuf_size - delta);
 			c->vc_origin = vga_vram_end - c->vc_screenbuf_size;
 			vga_rolled_over = 0;
-		} else if (oldo - delta >= (unsigned long)c->vc_screenbuf)
+		} else
 			c->vc_origin -= delta;
 		c->vc_scr_end = c->vc_origin + c->vc_screenbuf_size;
 		scr_memsetw((u16 *) (c->vc_origin), c->vc_video_erase_char,

drivers/video/fbdev/core/fbcon.c

@@ -837,7 +837,8 @@ static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
 				   fg_vc->vc_rows);
 	}
 
-	update_screen(vc_cons[fg_console].d);
+	if (fg_console != unit)
+		update_screen(vc_cons[fg_console].d);
 }
 
 /**
@@ -1375,6 +1376,7 @@ static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 	struct vc_data *svc;
 	struct fbcon_ops *ops = info->fbcon_par;
 	int rows, cols;
+	unsigned long ret = 0;
 
 	p = &fb_display[unit];
 
@@ -1425,11 +1427,10 @@ static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 	rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
 	cols /= vc->vc_font.width;
 	rows /= vc->vc_font.height;
-	vc_resize(vc, cols, rows);
+	ret = vc_resize(vc, cols, rows);
 
-	if (con_is_visible(vc)) {
+	if (con_is_visible(vc) && !ret)
 		update_screen(vc);
-	}
 }
 
 static __inline__ void ywrap_up(struct vc_data *vc, int count)