[PATCH] i386/x86-64: Don't randomize stack top when no randomization personality is set

Based on patch from Frank van Maarseveen <frankvm@frankvm.com>, but
extended.

Signed-off-by: Andi Kleen <ak@suse.de>

1 files changed, 2 insertions, 1 deletions

diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 672a3b90bc55..5109dbff93bf 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -515,7 +515,8 @@ static unsigned long randomize_stack_top(unsigned long stack_top)
 {
         unsigned int random_variable = 0;
 
-        if (current->flags & PF_RANDOMIZE) {
+        if ((current->flags & PF_RANDOMIZE) &&
+                !(current->personality & ADDR_NO_RANDOMIZE)) {
                 random_variable = get_random_int() & STACK_RND_MASK;
                 random_variable <<= PAGE_SHIFT;
         }