---

yaml --- r: 230965 b: refs/heads/master c: 9046e40 h: refs/heads/master i: 230963: 116af82 v: v3
git-mirror · Jan 12, 2011 · 9c09c65 · 9c09c65
1 parent 5f9cefc
commit 9c09c65
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Showing 3 changed files with 13 additions and 2 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 7a63fa1a85d75756368d9c86fff5c1b193de991c
+refs/heads/master: 9046e401e752dba784805a7818f99cc45a39cbff
diff --git a/trunk/arch/s390/include/asm/elf.h b/trunk/arch/s390/include/asm/elf.h
@@ -206,6 +206,8 @@ do {								\
 	current->mm->context.noexec == 0;		\
 })
 
+#define STACK_RND_MASK	0x7ffUL
+
 #define ARCH_DLINFO							    \
 do {									    \
 	if (vdso_enabled)						    \

diff --git a/trunk/arch/s390/mm/mmap.c b/trunk/arch/s390/mm/mmap.c
@@ -30,6 +30,15 @@
 #include <asm/pgalloc.h>
 #include <asm/compat.h>
 
+static unsigned long stack_maxrandom_size(void)
+{
+	if (!(current->flags & PF_RANDOMIZE))
+		return 0;
+	if (current->personality & ADDR_NO_RANDOMIZE)
+		return 0;
+	return STACK_RND_MASK << PAGE_SHIFT;
+}
+
 /*
  * Top of mmap area (just below the process stack).
  *
@@ -47,7 +56,7 @@ static inline unsigned long mmap_base(void)
 	else if (gap > MAX_GAP)
 		gap = MAX_GAP;
 
-	return STACK_TOP - (gap & PAGE_MASK);
+	return STACK_TOP - stack_maxrandom_size() - (gap & PAGE_MASK);
 }
 
 static inline int mmap_is_legacy(void)