Merge branch 'akpm' (patches from Andrew)

Merge misc fixes from Andrew Morton:
 "11 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  kasan: do not sanitize kexec purgatory
  drivers/rapidio/devices/tsi721.c: make module parameter variable name unique
  mm/hugetlb.c: don't call region_abort if region_chg fails
  kasan: report only the first error by default
  hugetlbfs: initialize shared policy as part of inode allocation
  mm: fix section name for .data..ro_after_init
  mm, hugetlb: use pte_present() instead of pmd_present() in follow_huge_pmd()
  mm: workingset: fix premature shadow node shrinking with cgroups
  mm: rmap: fix huge file mmap accounting in the memcg stats
  mm: move mm_percpu_wq initialization earlier
  mm: migrate: fix remove_migration_pte() for ksm pages
This commit is contained in:
Linus Torvalds 2017-04-01 19:45:05 -07:00
commit 978e0f92cd
22 changed files with 104 additions and 42 deletions

View File

@ -1725,6 +1725,12 @@
kernel and module base offset ASLR (Address Space
Layout Randomization).
kasan_multi_shot
[KNL] Enforce KASAN (Kernel Address Sanitizer) to print
report on every invalid memory access. Without this
parameter KASAN will print report only for the first
invalid access.
keepinitrd [HW,ARM]
kernelcore= [KNL,X86,IA-64,PPC]

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@ -4,6 +4,5 @@
#include <asm-generic/sections.h>
extern char _eshared[], _ehead[];
extern char __start_ro_after_init[], __end_ro_after_init[];
#endif

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@ -63,11 +63,9 @@ SECTIONS
. = ALIGN(PAGE_SIZE);
__start_ro_after_init = .;
__start_data_ro_after_init = .;
.data..ro_after_init : {
*(.data..ro_after_init)
}
__end_data_ro_after_init = .;
EXCEPTION_TABLE(16)
. = ALIGN(PAGE_SIZE);
__end_ro_after_init = .;

View File

@ -8,6 +8,7 @@ PURGATORY_OBJS = $(addprefix $(obj)/,$(purgatory-y))
LDFLAGS_purgatory.ro := -e purgatory_start -r --no-undefined -nostdlib -z nodefaultlib
targets += purgatory.ro
KASAN_SANITIZE := n
KCOV_INSTRUMENT := n
# Default KBUILD_CFLAGS can have -pg option set when FTRACE is enabled. That

View File

@ -37,8 +37,8 @@
#include "tsi721.h"
#ifdef DEBUG
u32 dbg_level;
module_param(dbg_level, uint, S_IWUSR | S_IRUGO);
u32 tsi_dbg_level;
module_param_named(dbg_level, tsi_dbg_level, uint, S_IWUSR | S_IRUGO);
MODULE_PARM_DESC(dbg_level, "Debugging output level (default 0 = none)");
#endif

View File

@ -40,11 +40,11 @@ enum {
};
#ifdef DEBUG
extern u32 dbg_level;
extern u32 tsi_dbg_level;
#define tsi_debug(level, dev, fmt, arg...) \
do { \
if (DBG_##level & dbg_level) \
if (DBG_##level & tsi_dbg_level) \
dev_dbg(dev, "%s: " fmt "\n", __func__, ##arg); \
} while (0)
#else

View File

@ -695,14 +695,11 @@ static struct inode *hugetlbfs_get_root(struct super_block *sb,
inode = new_inode(sb);
if (inode) {
struct hugetlbfs_inode_info *info;
inode->i_ino = get_next_ino();
inode->i_mode = S_IFDIR | config->mode;
inode->i_uid = config->uid;
inode->i_gid = config->gid;
inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
info = HUGETLBFS_I(inode);
mpol_shared_policy_init(&info->policy, NULL);
inode->i_op = &hugetlbfs_dir_inode_operations;
inode->i_fop = &simple_dir_operations;
/* directory inodes start off with i_nlink == 2 (for "." entry) */
@ -733,7 +730,6 @@ static struct inode *hugetlbfs_get_inode(struct super_block *sb,
inode = new_inode(sb);
if (inode) {
struct hugetlbfs_inode_info *info;
inode->i_ino = get_next_ino();
inode_init_owner(inode, dir, mode);
lockdep_set_class(&inode->i_mapping->i_mmap_rwsem,
@ -741,15 +737,6 @@ static struct inode *hugetlbfs_get_inode(struct super_block *sb,
inode->i_mapping->a_ops = &hugetlbfs_aops;
inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
inode->i_mapping->private_data = resv_map;
info = HUGETLBFS_I(inode);
/*
* The policy is initialized here even if we are creating a
* private inode because initialization simply creates an
* an empty rb tree and calls rwlock_init(), later when we
* call mpol_free_shared_policy() it will just return because
* the rb tree will still be empty.
*/
mpol_shared_policy_init(&info->policy, NULL);
switch (mode & S_IFMT) {
default:
init_special_inode(inode, mode, dev);
@ -937,6 +924,18 @@ static struct inode *hugetlbfs_alloc_inode(struct super_block *sb)
hugetlbfs_inc_free_inodes(sbinfo);
return NULL;
}
/*
* Any time after allocation, hugetlbfs_destroy_inode can be called
* for the inode. mpol_free_shared_policy is unconditionally called
* as part of hugetlbfs_destroy_inode. So, initialize policy here
* in case of a quick call to destroy.
*
* Note that the policy is initialized even if we are creating a
* private inode. This simplifies hugetlbfs_destroy_inode.
*/
mpol_shared_policy_init(&p->policy, NULL);
return &p->vfs_inode;
}

View File

@ -14,8 +14,8 @@
* [_sdata, _edata]: contains .data.* sections, may also contain .rodata.*
* and/or .init.* sections.
* [__start_rodata, __end_rodata]: contains .rodata.* sections
* [__start_data_ro_after_init, __end_data_ro_after_init]:
* contains data.ro_after_init section
* [__start_ro_after_init, __end_ro_after_init]:
* contains .data..ro_after_init section
* [__init_begin, __init_end]: contains .init.* sections, but .init.text.*
* may be out of this range on some architectures.
* [_sinittext, _einittext]: contains .init.text.* sections
@ -33,7 +33,7 @@ extern char _data[], _sdata[], _edata[];
extern char __bss_start[], __bss_stop[];
extern char __init_begin[], __init_end[];
extern char _sinittext[], _einittext[];
extern char __start_data_ro_after_init[], __end_data_ro_after_init[];
extern char __start_ro_after_init[], __end_ro_after_init[];
extern char _end[];
extern char __per_cpu_load[], __per_cpu_start[], __per_cpu_end[];
extern char __kprobes_text_start[], __kprobes_text_end[];

View File

@ -260,9 +260,9 @@
*/
#ifndef RO_AFTER_INIT_DATA
#define RO_AFTER_INIT_DATA \
__start_data_ro_after_init = .; \
__start_ro_after_init = .; \
*(.data..ro_after_init) \
__end_data_ro_after_init = .;
__end_ro_after_init = .;
#endif
/*

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@ -76,6 +76,9 @@ size_t ksize(const void *);
static inline void kasan_unpoison_slab(const void *ptr) { ksize(ptr); }
size_t kasan_metadata_size(struct kmem_cache *cache);
bool kasan_save_enable_multi_shot(void);
void kasan_restore_multi_shot(bool enabled);
#else /* CONFIG_KASAN */
static inline void kasan_unpoison_shadow(const void *address, size_t size) {}

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@ -740,6 +740,12 @@ static inline bool mem_cgroup_oom_synchronize(bool wait)
return false;
}
static inline void mem_cgroup_update_page_stat(struct page *page,
enum mem_cgroup_stat_index idx,
int nr)
{
}
static inline void mem_cgroup_inc_page_stat(struct page *page,
enum mem_cgroup_stat_index idx)
{

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@ -32,6 +32,8 @@ struct user_struct;
struct writeback_control;
struct bdi_writeback;
void init_mm_internals(void);
#ifndef CONFIG_NEED_MULTIPLE_NODES /* Don't use mapnrs, do it properly */
extern unsigned long max_mapnr;

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@ -1022,6 +1022,8 @@ static noinline void __init kernel_init_freeable(void)
workqueue_init();
init_mm_internals();
do_pre_smp_initcalls();
lockup_detector_init();

View File

@ -20,6 +20,7 @@
#include <linux/string.h>
#include <linux/uaccess.h>
#include <linux/module.h>
#include <linux/kasan.h>
/*
* Note: test functions are marked noinline so that their names appear in
@ -474,6 +475,12 @@ static noinline void __init use_after_scope_test(void)
static int __init kmalloc_tests_init(void)
{
/*
* Temporarily enable multi-shot mode. Otherwise, we'd only get a
* report for the first case.
*/
bool multishot = kasan_save_enable_multi_shot();
kmalloc_oob_right();
kmalloc_oob_left();
kmalloc_node_oob_right();
@ -499,6 +506,9 @@ static int __init kmalloc_tests_init(void)
ksize_unpoisons_memory();
copy_user_test();
use_after_scope_test();
kasan_restore_multi_shot(multishot);
return -EAGAIN;
}

View File

@ -4403,7 +4403,9 @@ int hugetlb_reserve_pages(struct inode *inode,
return 0;
out_err:
if (!vma || vma->vm_flags & VM_MAYSHARE)
region_abort(resv_map, from, to);
/* Don't call region_abort if region_chg failed */
if (chg >= 0)
region_abort(resv_map, from, to);
if (vma && is_vma_resv_set(vma, HPAGE_RESV_OWNER))
kref_put(&resv_map->refs, resv_map_release);
return ret;
@ -4651,6 +4653,7 @@ follow_huge_pmd(struct mm_struct *mm, unsigned long address,
{
struct page *page = NULL;
spinlock_t *ptl;
pte_t pte;
retry:
ptl = pmd_lockptr(mm, pmd);
spin_lock(ptl);
@ -4660,12 +4663,13 @@ retry:
*/
if (!pmd_huge(*pmd))
goto out;
if (pmd_present(*pmd)) {
pte = huge_ptep_get((pte_t *)pmd);
if (pte_present(pte)) {
page = pmd_page(*pmd) + ((address & ~PMD_MASK) >> PAGE_SHIFT);
if (flags & FOLL_GET)
get_page(page);
} else {
if (is_hugetlb_entry_migration(huge_ptep_get((pte_t *)pmd))) {
if (is_hugetlb_entry_migration(pte)) {
spin_unlock(ptl);
__migration_entry_wait(mm, (pte_t *)pmd, ptl);
goto retry;

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@ -96,11 +96,6 @@ static inline const void *kasan_shadow_to_mem(const void *shadow_addr)
<< KASAN_SHADOW_SCALE_SHIFT);
}
static inline bool kasan_report_enabled(void)
{
return !current->kasan_depth;
}
void kasan_report(unsigned long addr, size_t size,
bool is_write, unsigned long ip);
void kasan_report_double_free(struct kmem_cache *cache, void *object,

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@ -13,7 +13,9 @@
*
*/
#include <linux/bitops.h>
#include <linux/ftrace.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/printk.h>
@ -293,6 +295,40 @@ static void kasan_report_error(struct kasan_access_info *info)
kasan_end_report(&flags);
}
static unsigned long kasan_flags;
#define KASAN_BIT_REPORTED 0
#define KASAN_BIT_MULTI_SHOT 1
bool kasan_save_enable_multi_shot(void)
{
return test_and_set_bit(KASAN_BIT_MULTI_SHOT, &kasan_flags);
}
EXPORT_SYMBOL_GPL(kasan_save_enable_multi_shot);
void kasan_restore_multi_shot(bool enabled)
{
if (!enabled)
clear_bit(KASAN_BIT_MULTI_SHOT, &kasan_flags);
}
EXPORT_SYMBOL_GPL(kasan_restore_multi_shot);
static int __init kasan_set_multi_shot(char *str)
{
set_bit(KASAN_BIT_MULTI_SHOT, &kasan_flags);
return 1;
}
__setup("kasan_multi_shot", kasan_set_multi_shot);
static inline bool kasan_report_enabled(void)
{
if (current->kasan_depth)
return false;
if (test_bit(KASAN_BIT_MULTI_SHOT, &kasan_flags))
return true;
return !test_and_set_bit(KASAN_BIT_REPORTED, &kasan_flags);
}
void kasan_report(unsigned long addr, size_t size,
bool is_write, unsigned long ip)
{

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@ -1416,7 +1416,7 @@ static void kmemleak_scan(void)
/* data/bss scanning */
scan_large_block(_sdata, _edata);
scan_large_block(__bss_start, __bss_stop);
scan_large_block(__start_data_ro_after_init, __end_data_ro_after_init);
scan_large_block(__start_ro_after_init, __end_ro_after_init);
#ifdef CONFIG_SMP
/* per-cpu sections scanning */

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@ -209,8 +209,11 @@ static int remove_migration_pte(struct page *page, struct vm_area_struct *vma,
VM_BUG_ON_PAGE(PageTail(page), page);
while (page_vma_mapped_walk(&pvmw)) {
new = page - pvmw.page->index +
linear_page_index(vma, pvmw.address);
if (PageKsm(page))
new = page;
else
new = page - pvmw.page->index +
linear_page_index(vma, pvmw.address);
get_page(new);
pte = pte_mkold(mk_pte(new, READ_ONCE(vma->vm_page_prot)));

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@ -1159,7 +1159,7 @@ void page_add_file_rmap(struct page *page, bool compound)
goto out;
}
__mod_node_page_state(page_pgdat(page), NR_FILE_MAPPED, nr);
mem_cgroup_inc_page_stat(page, MEM_CGROUP_STAT_FILE_MAPPED);
mem_cgroup_update_page_stat(page, MEM_CGROUP_STAT_FILE_MAPPED, nr);
out:
unlock_page_memcg(page);
}
@ -1199,7 +1199,7 @@ static void page_remove_file_rmap(struct page *page, bool compound)
* pte lock(a spinlock) is held, which implies preemption disabled.
*/
__mod_node_page_state(page_pgdat(page), NR_FILE_MAPPED, -nr);
mem_cgroup_dec_page_stat(page, MEM_CGROUP_STAT_FILE_MAPPED);
mem_cgroup_update_page_stat(page, MEM_CGROUP_STAT_FILE_MAPPED, -nr);
if (unlikely(PageMlocked(page)))
clear_page_mlock(page);

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@ -1764,7 +1764,7 @@ static int vmstat_cpu_dead(unsigned int cpu)
#endif
static int __init setup_vmstat(void)
void __init init_mm_internals(void)
{
#ifdef CONFIG_SMP
int ret;
@ -1792,9 +1792,7 @@ static int __init setup_vmstat(void)
proc_create("vmstat", S_IRUGO, NULL, &proc_vmstat_file_operations);
proc_create("zoneinfo", S_IRUGO, NULL, &proc_zoneinfo_file_operations);
#endif
return 0;
}
module_init(setup_vmstat)
#if defined(CONFIG_DEBUG_FS) && defined(CONFIG_COMPACTION)

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@ -532,7 +532,7 @@ static int __init workingset_init(void)
pr_info("workingset: timestamp_bits=%d max_order=%d bucket_order=%u\n",
timestamp_bits, max_order, bucket_order);
ret = list_lru_init_key(&shadow_nodes, &shadow_nodes_key);
ret = __list_lru_init(&shadow_nodes, true, &shadow_nodes_key);
if (ret)
goto err;
ret = register_shrinker(&workingset_shadow_shrinker);