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increase AT_VECTOR_SIZE to terminate saved_auxv properly

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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>
This commit is contained in:
Olaf Hering 2007-10-16 23:30:12 -07:00 committed by Linus Torvalds
parent f77e349870
commit 4f9a58d75b
14 changed files with 23 additions and 3 deletions
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3
fs/binfmt_elf.c
View file

@ -175,6 +175,7 @@ create_elf_tables(struct linux_binprm *bprm, struct elfhdr *exec,
/* Create the ELF interpreter info */
elf_info = (elf_addr_t *)current->mm->saved_auxv;
/* update AT_VECTOR_SIZE_BASE if the number of NEW_AUX_ENT() changes */
#define NEW_AUX_ENT(id, val) \
do { \
elf_info[ei_index++] = id; \
@ -185,6 +186,8 @@ create_elf_tables(struct linux_binprm *bprm, struct elfhdr *exec,
/*
* ARCH_DLINFO must come first so PPC can do its special alignment of
* AUXV.
* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT() in
* ARCH_DLINFO changes
*/
ARCH_DLINFO;
#endif

1
include/asm-alpha/elf.h
View file

@ -155,6 +155,7 @@ extern int alpha_l1d_cacheshape;
extern int alpha_l2_cacheshape;
extern int alpha_l3_cacheshape;
/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
#define ARCH_DLINFO \
do { \
NEW_AUX_ENT(AT_L1I_CACHESHAPE, alpha_l1i_cacheshape); \

1
include/asm-alpha/system.h
View file

@ -48,6 +48,7 @@
#ifndef __ASSEMBLY__
#include <linux/kernel.h>
#define AT_VECTOR_SIZE_ARCH 4 /* entries in ARCH_DLINFO */
/*
* This is the logout header that should be common to all platforms

1
include/asm-ia64/elf.h
View file

@ -192,6 +192,7 @@ extern int dump_task_fpu (struct task_struct *, elf_fpregset_t *);
#define GATE_EHDR ((const struct elfhdr *) GATE_ADDR)
/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
#define ARCH_DLINFO \
do { \
extern char __kernel_syscall_via_epc[]; \

2
include/asm-ia64/system.h
View file

@ -32,6 +32,8 @@
#include <linux/kernel.h>
#include <linux/types.h>
#define AT_VECTOR_SIZE_ARCH 2 /* entries in ARCH_DLINFO */
struct pci_vector_struct {
__u16 segment; /* PCI Segment number */
__u16 bus; /* PCI Bus number */

1
include/asm-powerpc/elf.h
View file

@ -291,6 +291,7 @@ extern int arch_setup_additional_pages(struct linux_binprm *bprm,
* AT_IGNOREPPC is used for that.
* - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
* even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes
*/
#define ARCH_DLINFO \
do { \

1
include/asm-powerpc/system.h
View file

@ -40,6 +40,7 @@
#define set_mb(var, value) do { var = value; mb(); } while (0)
#ifdef __KERNEL__
#define AT_VECTOR_SIZE_ARCH 6 /* entries in ARCH_DLINFO */
#ifdef CONFIG_SMP
#define smp_mb() mb()
#define smp_rmb() rmb()

1
include/asm-sh/elf.h
View file

@ -133,6 +133,7 @@ extern void __kernel_vsyscall;
#define VDSO_BASE ((unsigned long)current->mm->context.vdso)
#define VDSO_SYM(x) (VDSO_BASE + (unsigned long)(x))
/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
#define ARCH_DLINFO \
do { \
if (vdso_enabled) \

1
include/asm-sh/system.h
View file

@ -15,6 +15,7 @@
struct task_struct *__switch_to(struct task_struct *prev,
struct task_struct *next);
#define AT_VECTOR_SIZE_ARCH 1 /* entries in ARCH_DLINFO */
/*
* switch_to() should switch tasks to task nr n, first
*/

1
include/asm-x86/elf_32.h
View file

@ -153,6 +153,7 @@ extern int arch_setup_additional_pages(struct linux_binprm *bprm,
extern unsigned int vdso_enabled;
/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
#define ARCH_DLINFO \
do if (vdso_enabled) { \
NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY); \

1
include/asm-x86/system_32.h
View file

@ -7,6 +7,7 @@
#include <asm/cmpxchg.h>
#ifdef __KERNEL__
#define AT_VECTOR_SIZE_ARCH 2 /* entries in ARCH_DLINFO */
struct task_struct; /* one of the stranger aspects of C forward declarations.. */
extern struct task_struct * FASTCALL(__switch_to(struct task_struct *prev, struct task_struct *next));

4
include/linux/auxvec.h
View file

@ -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 */

1
include/linux/elf.h
View file

@ -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>

7
include/linux/mm_types.h
View file

@ -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