[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>
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 672a3b9..5109dbf 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -515,7 +515,8 @@
{
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;
}