lkml.org 
[lkml]   [2016]   [Aug]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 2/2] arm: apply more __ro_after_init
On Fri, Jun 03, 2016 at 11:40:24AM -0700, Kees Cook wrote:
> @@ -1309,16 +1309,11 @@ void __init arm_mm_memblock_reserve(void)
> * Any other function or debugging method which may touch any device _will_
> * crash the kernel.
> */
> +static char vectors[PAGE_SIZE * 2] __ro_after_init __aligned(PAGE_SIZE);
> static void __init devicemaps_init(const struct machine_desc *mdesc)
> {
> struct map_desc map;
> unsigned long addr;
> - void *vectors;
> -
> - /*
> - * Allocate the vector page early.
> - */
> - vectors = early_alloc(PAGE_SIZE * 2);

This one is not appropriate. We _do_ write to these pages after init
for FIQ handler updates. See set_fiq_handler().

--
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up
according to speedtest.net.

\
 
 \ /
  Last update: 2016-08-10 23:01    [W:0.180 / U:13.684 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site