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Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6

Browse Source 
* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6:
  [S390] MAINTAINERS: Update zcrypt driver entry
  [S390] Randomize PIEs
  [S390] Randomise the brk region
  [S390] Add is_32bit_task() helper function
  [S390] Randomize lower bits of stack address
  [S390] Randomize mmap start address
  [S390] Rearrange mmap.c
  [S390] Enable flexible mmap layout for 64 bit processes
  [S390] vdso: dont map at mmap_base
  [S390] reduce miminum gap between stack and mmap_base
  [S390] mmap: consider stack address randomization
  [S390] Update default configuration
  [S390] cio: path_event overindication after resume
This commit is contained in:
Linus Torvalds 2011-01-14 08:47:26 -08:00
commit c1e0d97d3d
10 changed files with 103 additions and 27 deletions
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3
MAINTAINERS
View File

@ -5272,8 +5272,7 @@ S: Supported
F: drivers/s390/net/
S390 ZCRYPT DRIVER
M: Felix Beck <felix.beck@de.ibm.com>
M: Ralph Wuerthner <ralph.wuerthner@de.ibm.com>
M: Holger Dengler <hd@linux.vnet.ibm.com>
M: linux390@de.ibm.com
L: linux-s390@vger.kernel.org
W: http://www.ibm.com/developerworks/linux/linux390/

16
arch/s390/defconfig
View File

@ -5,10 +5,21 @@ CONFIG_AUDIT=y
CONFIG_RCU_TRACE=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_CGROUPS=y
CONFIG_CPUSETS=y
CONFIG_CGROUP_CPUACCT=y
CONFIG_RESOURCE_COUNTERS=y
CONFIG_CGROUP_MEM_RES_CTLR=y
CONFIG_CGROUP_MEM_RES_CTLR_SWAP=y
CONFIG_CGROUP_SCHED=y
CONFIG_RT_GROUP_SCHED=y
CONFIG_BLK_CGROUP=y
CONFIG_BLK_DEV_INITRD=y
# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
CONFIG_PERF_EVENTS=y
# CONFIG_COMPAT_BRK is not set
CONFIG_SLAB=y
CONFIG_PROFILING=y
CONFIG_OPROFILE=y
CONFIG_KPROBES=y
CONFIG_MODULES=y
CONFIG_MODULE_UNLOAD=y
@ -19,7 +30,9 @@ CONFIG_HIGH_RES_TIMERS=y
CONFIG_PREEMPT=y
CONFIG_MEMORY_HOTPLUG=y
CONFIG_MEMORY_HOTREMOVE=y
CONFIG_KSM=y
CONFIG_BINFMT_MISC=m
CONFIG_CMM=m
CONFIG_HZ_100=y
CONFIG_KEXEC=y
CONFIG_PM=y
@ -105,6 +118,7 @@ CONFIG_DEBUG_LIST=y
CONFIG_DEBUG_NOTIFIERS=y
# CONFIG_RCU_CPU_STALL_DETECTOR is not set
CONFIG_KPROBES_SANITY_TEST=y
CONFIG_DEBUG_FORCE_WEAK_PER_CPU=y
CONFIG_CPU_NOTIFIER_ERROR_INJECT=m
CONFIG_LATENCYTOP=y
CONFIG_SYSCTL_SYSCALL_CHECK=y

2
arch/s390/include/asm/compat.h
View File

@ -169,7 +169,7 @@ static inline compat_uptr_t ptr_to_compat(void __user *uptr)
static inline int is_compat_task(void)
{
return test_thread_flag(TIF_31BIT);
return is_32bit_task();
}
#else

9
arch/s390/include/asm/elf.h
View File

@ -161,7 +161,9 @@ extern unsigned int vdso_enabled;
use of this is to invoke "./ld.so someprog" to test out a new version of
the loader. We need to make sure that it is out of the way of the program
that it will "exec", and that there is sufficient room for the brk. */
#define ELF_ET_DYN_BASE (STACK_TOP / 3 * 2)
extern unsigned long randomize_et_dyn(unsigned long base);
#define ELF_ET_DYN_BASE (randomize_et_dyn(STACK_TOP / 3 * 2))
/* This yields a mask that user programs can use to figure out what
instruction set this CPU supports. */
@ -206,6 +208,8 @@ do { \
current->mm->context.noexec == 0; \
})
#define STACK_RND_MASK 0x7ffUL
#define ARCH_DLINFO \
do { \
if (vdso_enabled) \
@ -218,4 +222,7 @@ struct linux_binprm;
#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
int arch_setup_additional_pages(struct linux_binprm *, int);
extern unsigned long arch_randomize_brk(struct mm_struct *mm);
#define arch_randomize_brk arch_randomize_brk
#endif

2
arch/s390/include/asm/system.h
View File

@ -449,7 +449,7 @@ extern void (*_machine_restart)(char *command);
extern void (*_machine_halt)(void);
extern void (*_machine_power_off)(void);
#define arch_align_stack(x) (x)
extern unsigned long arch_align_stack(unsigned long sp);
static inline int tprot(unsigned long addr)
{

6
arch/s390/include/asm/thread_info.h
View File

@ -118,6 +118,12 @@ static inline struct thread_info *current_thread_info(void)
#define _TIF_SINGLE_STEP (1<<TIF_FREEZE)
#define _TIF_FREEZE (1<<TIF_FREEZE)
#ifdef CONFIG_64BIT
#define is_32bit_task() (test_thread_flag(TIF_31BIT))
#else
#define is_32bit_task() (1)
#endif
#endif /* __KERNEL__ */
#define PREEMPT_ACTIVE 0x4000000

38
arch/s390/kernel/process.c
View File

@ -30,9 +30,11 @@
#include <linux/tick.h>
#include <linux/elfcore.h>
#include <linux/kernel_stat.h>
#include <linux/personality.h>
#include <linux/syscalls.h>
#include <linux/compat.h>
#include <linux/kprobes.h>
#include <linux/random.h>
#include <asm/compat.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
@ -332,3 +334,39 @@ unsigned long get_wchan(struct task_struct *p)
}
return 0;
}
unsigned long arch_align_stack(unsigned long sp)
{
if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space)
sp -= get_random_int() & ~PAGE_MASK;
return sp & ~0xf;
}
static inline unsigned long brk_rnd(void)
{
/* 8MB for 32bit, 1GB for 64bit */
if (is_32bit_task())
return (get_random_int() & 0x7ffUL) << PAGE_SHIFT;
else
return (get_random_int() & 0x3ffffUL) << PAGE_SHIFT;
}
unsigned long arch_randomize_brk(struct mm_struct *mm)
{
unsigned long ret = PAGE_ALIGN(mm->brk + brk_rnd());
if (ret < mm->brk)
return mm->brk;
return ret;
}
unsigned long randomize_et_dyn(unsigned long base)
{
unsigned long ret = PAGE_ALIGN(base + brk_rnd());
if (!(current->flags & PF_RANDOMIZE))
return base;
if (ret < base)
return base;
return ret;
}

4
arch/s390/kernel/vdso.c
View File

@ -203,7 +203,6 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
if (!uses_interp)
return 0;
vdso_base = mm->mmap_base;
#ifdef CONFIG_64BIT
vdso_pagelist = vdso64_pagelist;
vdso_pages = vdso64_pages;
@ -233,8 +232,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
* fail and end up putting it elsewhere.
*/
down_write(&mm->mmap_sem);
vdso_base = get_unmapped_area(NULL, vdso_base,
vdso_pages << PAGE_SHIFT, 0, 0);
vdso_base = get_unmapped_area(NULL, 0, vdso_pages << PAGE_SHIFT, 0, 0);
if (IS_ERR_VALUE(vdso_base)) {
rc = vdso_base;
goto out_up;

49
arch/s390/mm/mmap.c
View File

@ -27,17 +27,44 @@
#include <linux/personality.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/random.h>
#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).
*
* Leave an at least ~128 MB hole.
* Leave at least a ~32 MB hole.
*/
#define MIN_GAP (128*1024*1024)
#define MIN_GAP (32*1024*1024)
#define MAX_GAP (STACK_TOP/6*5)
static inline int mmap_is_legacy(void)
{
if (current->personality & ADDR_COMPAT_LAYOUT)
return 1;
if (rlimit(RLIMIT_STACK) == RLIM_INFINITY)
return 1;
return sysctl_legacy_va_layout;
}
static unsigned long mmap_rnd(void)
{
if (!(current->flags & PF_RANDOMIZE))
return 0;
/* 8MB randomization for mmap_base */
return (get_random_int() & 0x7ffUL) << PAGE_SHIFT;
}
static inline unsigned long mmap_base(void)
{
unsigned long gap = rlimit(RLIMIT_STACK);
@ -46,22 +73,8 @@ static inline unsigned long mmap_base(void)
gap = MIN_GAP;
else if (gap > MAX_GAP)
gap = MAX_GAP;
return STACK_TOP - (gap & PAGE_MASK);
}
static inline int mmap_is_legacy(void)
{
#ifdef CONFIG_64BIT
/*
* Force standard allocation for 64 bit programs.
*/
if (!is_compat_task())
return 1;
#endif
return sysctl_legacy_va_layout ||
(current->personality & ADDR_COMPAT_LAYOUT) ||
rlimit(RLIMIT_STACK) == RLIM_INFINITY;
gap &= PAGE_MASK;
return STACK_TOP - stack_maxrandom_size() - mmap_rnd() - gap;
}
#ifndef CONFIG_64BIT

1
drivers/s390/cio/device.c
View File

@ -1835,6 +1835,7 @@ static void __ccw_device_pm_restore(struct ccw_device *cdev)
* available again. Kick re-detection.
*/
cdev->private->flags.resuming = 1;
cdev->private->path_new_mask = LPM_ANYPATH;
css_schedule_eval(sch->schid);
spin_unlock_irq(sch->lock);
css_complete_work();