From: Jeff Dike <jdike@addtoit.com>
Date: Tue, 26 Sep 2006 06:33:01 +0000 (-0700)
Subject: [PATCH] uml: Fix stack alignment
X-Git-Tag: v3.12-rc1~33864
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8f80e9466e18288df7391c9d21532c4125ac9c62;p=kernel%2Fkernel-generic.git

[PATCH] uml: Fix stack alignment

Stack randomization needs to be conditional on the personality allowing it.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/arch/um/kernel/process_kern.c b/arch/um/kernel/process_kern.c
index f6a5a50..537895d 100644
--- a/arch/um/kernel/process_kern.c
+++ b/arch/um/kernel/process_kern.c
@@ -23,6 +23,7 @@
 #include "linux/proc_fs.h"
 #include "linux/ptrace.h"
 #include "linux/random.h"
+#include "linux/personality.h"
 #include "asm/unistd.h"
 #include "asm/mman.h"
 #include "asm/segment.h"
@@ -476,7 +477,7 @@ int singlestepping(void * t)
 #ifndef arch_align_stack
 unsigned long arch_align_stack(unsigned long sp)
 {
-	if (randomize_va_space)
+	if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space)
 		sp -= get_random_int() % 8192;
 	return sp & ~0xf;
 }