Re: [PATCH] no-execute -- please test

On 8/14/06, Michel D=E4nzer [off-list ref] wrote:

On Sun, 2006-08-13 at 23:20 -0400, Albert Cahalan wrote:

quoted

If you want heap protection, change VM_DATA_DEFAULT_FLAGS32
in include/asm-powerpc/page.h to be like VM_STACK_DEFAULT_FLAGS.
I'd love to hear if anybody can get X to start with this change.
For me (Xorg w/ ATI) a module load fails.

Which versions of the X server and driver, and which module fails to
load exactly how? As of X.Org 6.9, the X server no longer uses a custom
module loader but just dlopen and friends.

xorg                    1:7.0.20
xserver-xorg            1:7.0.20
xserver-xorg-core       1:1.0.2-8
xserver-xorg-video-ati  1:6.5.8.0-1

Debian's aptitude program didn't complain, and I didn't do anything
like holding back a package, so the version mismatch isn't my doing.

What calls does the old X server use to allocate the memory?
Knowing the mmap() and/or mprotect() args might help to let
the old server still work.

If dlopen() doesn't need to patch up the code, W^X could be
enforced on the new X server.