[PATCH] efifb: Don't show the mapping VA

From: Andy Lutomirski
Date: Wed May 11 2016 - 19:57:57 EST


The framebuffer mapping virtual address leaks information about the
kernel memory layout. Stop logging it.

Cc: Peter Jones <pjones@xxxxxxxxxx>
Cc: Jean-Christophe Plagniol-Villard <plagnioj@xxxxxxxxxxxx>
Cc: Tomi Valkeinen <tomi.valkeinen@xxxxxx>
Cc: linux-fbdev@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Signed-off-by: Andy Lutomirski <luto@xxxxxxxxxx>
---
drivers/video/fbdev/efifb.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/video/fbdev/efifb.c b/drivers/video/fbdev/efifb.c
index 95d293b7445a..3dcaf4e82885 100644
--- a/drivers/video/fbdev/efifb.c
+++ b/drivers/video/fbdev/efifb.c
@@ -247,10 +247,8 @@ static int efifb_probe(struct platform_device *dev)
goto err_release_fb;
}

- printk(KERN_INFO "efifb: framebuffer at 0x%lx, mapped to 0x%p, "
- "using %dk, total %dk\n",
- efifb_fix.smem_start, info->screen_base,
- size_remap/1024, size_total/1024);
+ printk(KERN_INFO "efifb: framebuffer at 0x%lx, using %dk, total %dk\n",
+ efifb_fix.smem_start, size_remap/1024, size_total/1024);
printk(KERN_INFO "efifb: mode is %dx%dx%d, linelength=%d, pages=%d\n",
efifb_defined.xres, efifb_defined.yres,
efifb_defined.bits_per_pixel, efifb_fix.line_length,
--
2.5.5