From 4f9a58d75bfe82ab2b8ba5b8506dfb190a267834 Mon Sep 17 00:00:00 2001
From: Olaf Hering <olaf@aepfle.de>
Date: Tue, 16 Oct 2007 23:30:12 -0700
Subject: increase AT_VECTOR_SIZE to terminate saved_auxv properly

include/asm-powerpc/elf.h has 6 entries in ARCH_DLINFO.  fs/binfmt_elf.c
has 14 unconditional NEW_AUX_ENT entries and 2 conditional NEW_AUX_ENT
entries.  So in the worst case, saved_auxv does not get an AT_NULL entry at
the end.

The saved_auxv array must be terminated with an AT_NULL entry.  Make the
size of mm_struct->saved_auxv arch dependend, based on the number of
ARCH_DLINFO entries.

Signed-off-by: Olaf Hering <olh@suse.de>
Cc: Roland McGrath <roland@redhat.com>
Cc: Jakub Jelinek <jakub@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 include/linux/auxvec.h   | 4 +++-
 include/linux/elf.h      | 1 -
 include/linux/mm_types.h | 7 ++++++-
 3 files changed, 9 insertions(+), 3 deletions(-)

(limited to 'include/linux')

diff --git a/include/linux/auxvec.h b/include/linux/auxvec.h
index d2bc0d66e65..ad895455ab7 100644
--- a/include/linux/auxvec.h
+++ b/include/linux/auxvec.h
@@ -26,6 +26,8 @@
 
 #define AT_SECURE 23   /* secure mode boolean */
 
-#define AT_VECTOR_SIZE  44 /* Size of auxiliary table.  */
+#ifdef __KERNEL__
+#define AT_VECTOR_SIZE_BASE (14 + 2) /* NEW_AUX_ENT entries in auxiliary table */
+#endif
 
 #endif /* _LINUX_AUXVEC_H */
diff --git a/include/linux/elf.h b/include/linux/elf.h
index 0eb9ed2f418..576e83bd6d8 100644
--- a/include/linux/elf.h
+++ b/include/linux/elf.h
@@ -2,7 +2,6 @@
 #define _LINUX_ELF_H
 
 #include <linux/types.h>
-#include <linux/auxvec.h>
 #include <linux/elf-em.h>
 #include <asm/elf.h>
 
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 87766791845..f4c03e0b355 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -1,7 +1,7 @@
 #ifndef _LINUX_MM_TYPES_H
 #define _LINUX_MM_TYPES_H
 
-#include <linux/auxvec.h>	/* For AT_VECTOR_SIZE */
+#include <linux/auxvec.h>
 #include <linux/types.h>
 #include <linux/threads.h>
 #include <linux/list.h>
@@ -13,6 +13,11 @@
 #include <asm/page.h>
 #include <asm/mmu.h>
 
+#ifndef AT_VECTOR_SIZE_ARCH
+#define AT_VECTOR_SIZE_ARCH 0
+#endif
+#define AT_VECTOR_SIZE (2*(AT_VECTOR_SIZE_ARCH + AT_VECTOR_SIZE_BASE + 1))
+
 struct address_space;
 
 #if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS
-- 
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