src/patches/suse-2.6.27.31/patches.xen/xen3-x86-mark_rodata_rw-2.patch

   1 From: Andres Gruenbacher <agruen@suse.de>
   2 Subject: Also mark rodata pages executable in mark_rodata_rw()
   3
   4 For review: do we also need to mark rodata pages executable in
   5 mark_rodata_rw() to fully undo mark_rodata_ro()?
   6
   7 Signed-off-by: Andres Gruenbacher <agruen@suse.de>
   8
   9 Automatically created from "patches.suse/x86-mark_rodata_rw-2.patch" by xen-port-patches.py
  10
  11 --- head-2009-02-02.orig/arch/x86/mm/init_64-xen.c      2009-02-02 10:07:59.000000000 +0100
  12 +++ head-2009-02-02/arch/x86/mm/init_64-xen.c   2009-02-02 10:08:33.000000000 +0100
  13 @@ -1234,6 +1234,12 @@ void mark_rodata_rw(void)
  14         printk(KERN_INFO "Write enabling the kernel read-only data: %luk\n",
  15                (end - start) >> 10);
  16         set_memory_rw_force(start, (end - start) >> PAGE_SHIFT);
  17 +
  18 +       /*
  19 +        * The rodata section should also be executable. (The kernel text
  20 +        * still is!)
  21 +        */
  22 +       set_memory_x_force(rodata_start, (end - rodata_start) >> PAGE_SHIFT);
  23  }
  24  EXPORT_SYMBOL(mark_rodata_rw);
  25  #endif