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Merge branch 'akpm' (patches from Andrew)

Browse Source 
Merge more updates from Andrew Morton:

 - MM remainders

 - various misc things

 - kcov updates

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (27 commits)
  lib/test_printf.c: call wait_for_random_bytes() before plain %p tests
  hexagon: drop the unused variable zero_page_mask
  hexagon: fix printk format warning in setup.c
  mm: fix oom_kill event handling
  treewide: use PHYS_ADDR_MAX to avoid type casting ULLONG_MAX
  mm: use octal not symbolic permissions
  ipc: use new return type vm_fault_t
  sysvipc/sem: mitigate semnum index against spectre v1
  fault-injection: reorder config entries
  arm: port KCOV to arm
  sched/core / kcov: avoid kcov_area during task switch
  kcov: prefault the kcov_area
  kcov: ensure irq code sees a valid area
  kernel/relay.c: change return type to vm_fault_t
  exofs: avoid VLA in structures
  coredump: fix spam with zero VMA process
  fat: use fat_fs_error() instead of BUG_ON() in __fat_get_block()
  proc: skip branch in /proc/*/* lookup
  mremap: remove LATENCY_LIMIT from mremap to reduce the number of TLB shootdowns
  mm/memblock: add missing include <linux/bootmem.h>
  ...
This commit is contained in:
Linus Torvalds 2018-06-15 08:51:42 +09:00
commit b5d903c2d6
56 changed files with 396 additions and 211 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/arm/Kconfig
View File

@ -8,9 +8,10 @@ config ARM
select ARCH_HAS_DEVMEM_IS_ALLOWED
select ARCH_HAS_ELF_RANDOMIZE
select ARCH_HAS_FORTIFY_SOURCE
select ARCH_HAS_KCOV
select ARCH_HAS_PTE_SPECIAL if ARM_LPAE
select ARCH_HAS_SET_MEMORY
select ARCH_HAS_PHYS_TO_DMA
select ARCH_HAS_SET_MEMORY
select ARCH_HAS_STRICT_KERNEL_RWX if MMU && !XIP_KERNEL
select ARCH_HAS_STRICT_MODULE_RWX if MMU
select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST

3
arch/arm/boot/compressed/Makefile
View File

@ -25,6 +25,9 @@ endif
GCOV_PROFILE := n
# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.
KCOV_INSTRUMENT := n
#
# Architecture dependencies
#

8
arch/arm/kvm/hyp/Makefile
View File

@ -23,3 +23,11 @@ obj-$(CONFIG_KVM_ARM_HOST) += hyp-entry.o
obj-$(CONFIG_KVM_ARM_HOST) += switch.o
CFLAGS_switch.o += $(CFLAGS_ARMV7VE)
obj-$(CONFIG_KVM_ARM_HOST) += s2-setup.o
# KVM code is run at a different exception code with a different map, so
# compiler instrumentation that inserts callbacks or checks into the code may
# cause crashes. Just disable it.
GCOV_PROFILE := n
KASAN_SANITIZE := n
UBSAN_SANITIZE := n
KCOV_INSTRUMENT := n

3
arch/arm/vdso/Makefile
View File

@ -30,6 +30,9 @@ CFLAGS_vgettimeofday.o = -O2
# Disable gcov profiling for VDSO code
GCOV_PROFILE := n
# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.
KCOV_INSTRUMENT := n
# Force dependency
$(obj)/vdso.o : $(obj)/vdso.so

6
arch/arm64/mm/init.c
View File

@ -310,7 +310,7 @@ static void __init arm64_memory_present(void)
}
#endif
static phys_addr_t memory_limit = (phys_addr_t)ULLONG_MAX;
static phys_addr_t memory_limit = PHYS_ADDR_MAX;
/*
* Limit the memory size that was specified via FDT.
@ -401,7 +401,7 @@ void __init arm64_memblock_init(void)
* high up in memory, add back the kernel region that must be accessible
* via the linear mapping.
*/
if (memory_limit != (phys_addr_t)ULLONG_MAX) {
if (memory_limit != PHYS_ADDR_MAX) {
memblock_mem_limit_remove_map(memory_limit);
memblock_add(__pa_symbol(_text), (u64)(_end - _text));
}
@ -666,7 +666,7 @@ __setup("keepinitrd", keepinitrd_setup);
*/
static int dump_mem_limit(struct notifier_block *self, unsigned long v, void *p)
{
if (memory_limit != (phys_addr_t)ULLONG_MAX) {
if (memory_limit != PHYS_ADDR_MAX) {
pr_emerg("Memory Limit: %llu MB\n", memory_limit >> 20);
} else {
pr_emerg("Memory Limit: none\n");

1
arch/hexagon/include/asm/pgtable.h
View File

@ -30,7 +30,6 @@
/* A handy thing to have if one has the RAM. Declared in head.S */
extern unsigned long empty_zero_page;
extern unsigned long zero_page_mask;
/*
* The PTE model described here is that of the Hexagon Virtual Machine,

2
arch/hexagon/kernel/setup.c
View File

@ -66,7 +66,7 @@ void __init setup_arch(char **cmdline_p)
*/
__vmsetvec(_K_VM_event_vector);
printk(KERN_INFO "PHYS_OFFSET=0x%08x\n", PHYS_OFFSET);
printk(KERN_INFO "PHYS_OFFSET=0x%08lx\n", PHYS_OFFSET);
/*
* Simulator has a few differences from the hardware.

3
arch/hexagon/mm/init.c
View File

@ -39,9 +39,6 @@ unsigned long __phys_offset; /* physical kernel offset >> 12 */
/* Set as variable to limit PMD copies */
int max_kernel_seg = 0x303;
/* think this should be (page_size-1) the way it's used...*/
unsigned long zero_page_mask;
/* indicate pfn's of high memory */
unsigned long highstart_pfn, highend_pfn;

4
arch/mips/kernel/setup.c
View File

@ -93,7 +93,7 @@ void __init add_memory_region(phys_addr_t start, phys_addr_t size, long type)
* If the region reaches the top of the physical address space, adjust
* the size slightly so that (start + size) doesn't overflow
*/
if (start + size - 1 == (phys_addr_t)ULLONG_MAX)
if (start + size - 1 == PHYS_ADDR_MAX)
--size;
/* Sanity check */
@ -376,7 +376,7 @@ static void __init bootmem_init(void)
unsigned long reserved_end;
unsigned long mapstart = ~0UL;
unsigned long bootmap_size;
phys_addr_t ramstart = (phys_addr_t)ULLONG_MAX;
phys_addr_t ramstart = PHYS_ADDR_MAX;
bool bootmap_valid = false;
int i;

2
arch/powerpc/mm/mem.c
View File

@ -215,7 +215,7 @@ void __init mem_topology_setup(void)
/* Place all memblock_regions in the same node and merge contiguous
* memblock_regions
*/
memblock_set_node(0, (phys_addr_t)ULLONG_MAX, &memblock.memory, 0);
memblock_set_node(0, PHYS_ADDR_MAX, &memblock.memory, 0);
}
void __init initmem_init(void)

2
arch/sparc/mm/init_64.c
View File

@ -1620,7 +1620,7 @@ static void __init bootmem_init_nonnuma(void)
(top_of_ram - total_ram) >> 20);
init_node_masks_nonnuma();
memblock_set_node(0, (phys_addr_t)ULLONG_MAX, &memblock.memory, 0);
memblock_set_node(0, PHYS_ADDR_MAX, &memblock.memory, 0);
allocate_node_data(0);
node_set_online(0);
}

4
arch/x86/mm/init.c
View File

@ -706,7 +706,9 @@ void __init init_mem_mapping(void)
*/
int devmem_is_allowed(unsigned long pagenr)
{
if (page_is_ram(pagenr)) {
if (region_intersects(PFN_PHYS(pagenr), PAGE_SIZE,
IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE)
!= REGION_DISJOINT) {
/*
* For disallowed memory regions in the low 1MB range,
* request that the page be shown as all zeros.

2
arch/x86/mm/init_32.c
View File

@ -692,7 +692,7 @@ void __init initmem_init(void)
high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1;
#endif
memblock_set_node(0, (phys_addr_t)ULLONG_MAX, &memblock.memory, 0);
memblock_set_node(0, PHYS_ADDR_MAX, &memblock.memory, 0);
sparse_memory_present_with_active_regions(0);
#ifdef CONFIG_FLATMEM

2
arch/x86/mm/init_64.c
View File

@ -742,7 +742,7 @@ kernel_physical_mapping_init(unsigned long paddr_start,
#ifndef CONFIG_NUMA
void __init initmem_init(void)
{
memblock_set_node(0, (phys_addr_t)ULLONG_MAX, &memblock.memory, 0);
memblock_set_node(0, PHYS_ADDR_MAX, &memblock.memory, 0);
}
#endif

2
drivers/firmware/efi/arm-init.c
View File

@ -193,7 +193,7 @@ static __init void reserve_regions(void)
* uses its own memory map instead.
*/
memblock_dump_all();
memblock_remove(0, (phys_addr_t)ULLONG_MAX);
memblock_remove(0, PHYS_ADDR_MAX);
for_each_efi_memory_desc(md) {
paddr = md->phys_addr;

2
drivers/remoteproc/qcom_q6v5_pil.c
View File

@ -686,7 +686,7 @@ static int q6v5_mpss_load(struct q6v5 *qproc)
struct elf32_hdr *ehdr;
phys_addr_t mpss_reloc;
phys_addr_t boot_addr;
phys_addr_t min_addr = (phys_addr_t)ULLONG_MAX;
phys_addr_t min_addr = PHYS_ADDR_MAX;
phys_addr_t max_addr = 0;
bool relocate = false;
char seg_name[10];

4
drivers/soc/qcom/mdt_loader.c
View File

@ -50,7 +50,7 @@ ssize_t qcom_mdt_get_size(const struct firmware *fw)
const struct elf32_phdr *phdrs;
const struct elf32_phdr *phdr;
const struct elf32_hdr *ehdr;
phys_addr_t min_addr = (phys_addr_t)ULLONG_MAX;
phys_addr_t min_addr = PHYS_ADDR_MAX;
phys_addr_t max_addr = 0;
int i;
@ -97,7 +97,7 @@ int qcom_mdt_load(struct device *dev, const struct firmware *fw,
const struct elf32_hdr *ehdr;
const struct firmware *seg_fw;
phys_addr_t mem_reloc;
phys_addr_t min_addr = (phys_addr_t)ULLONG_MAX;
phys_addr_t min_addr = PHYS_ADDR_MAX;
phys_addr_t max_addr = 0;
size_t fw_name_len;
ssize_t offset;

17
fs/binfmt_elf.c
View File

@ -1621,8 +1621,8 @@ static int fill_files_note(struct memelfnote *note)
if (size >= MAX_FILE_NOTE_SIZE) /* paranoia check */
return -EINVAL;
size = round_up(size, PAGE_SIZE);
data = vmalloc(size);
if (!data)
data = kvmalloc(size, GFP_KERNEL);
if (ZERO_OR_NULL_PTR(data))
return -ENOMEM;
start_end_ofs = data + 2;
@ -1639,7 +1639,7 @@ static int fill_files_note(struct memelfnote *note)
filename = file_path(file, name_curpos, remaining);
if (IS_ERR(filename)) {
if (PTR_ERR(filename) == -ENAMETOOLONG) {
vfree(data);
kvfree(data);
size = size * 5 / 4;
goto alloc;
}
@ -1932,7 +1932,7 @@ static void free_note_info(struct elf_note_info *info)
kfree(t);
}
kfree(info->psinfo.data);
vfree(info->files.data);
kvfree(info->files.data);
}
#else
@ -2148,7 +2148,7 @@ static void free_note_info(struct elf_note_info *info)
/* Free data possibly allocated by fill_files_note(): */
if (info->notes_files)
vfree(info->notes_files->data);
kvfree(info->notes_files->data);
kfree(info->prstatus);
kfree(info->psinfo);
@ -2294,8 +2294,9 @@ static int elf_core_dump(struct coredump_params *cprm)
if (segs - 1 > ULONG_MAX / sizeof(*vma_filesz))
goto end_coredump;
vma_filesz = vmalloc(array_size(sizeof(*vma_filesz), (segs - 1)));
if (!vma_filesz)
vma_filesz = kvmalloc(array_size(sizeof(*vma_filesz), (segs - 1)),
GFP_KERNEL);
if (ZERO_OR_NULL_PTR(vma_filesz))
goto end_coredump;
for (i = 0, vma = first_vma(current, gate_vma); vma != NULL;
@ -2402,7 +2403,7 @@ end_coredump:
cleanup:
free_note_info(&info);
kfree(shdr4extnum);
vfree(vma_filesz);
kvfree(vma_filesz);
kfree(phdr4note);
kfree(elf);
out:

82
fs/exofs/ore.c
View File

@ -146,68 +146,82 @@ int _ore_get_io_state(struct ore_layout *layout,
struct ore_io_state **pios)
{
struct ore_io_state *ios;
struct page **pages;
struct osd_sg_entry *sgilist;
size_t size_ios, size_extra, size_total;
void *ios_extra;
/*
* The desired layout looks like this, with the extra_allocation
* items pointed at from fields within ios or per_dev:
struct __alloc_all_io_state {
struct ore_io_state ios;
struct ore_per_dev_state per_dev[numdevs];
union {
struct osd_sg_entry sglist[sgs_per_dev * numdevs];
struct page *pages[num_par_pages];
};
} *_aios;
} extra_allocation;
} whole_allocation;
if (likely(sizeof(*_aios) <= PAGE_SIZE)) {
_aios = kzalloc(sizeof(*_aios), GFP_KERNEL);
if (unlikely(!_aios)) {
ORE_DBGMSG("Failed kzalloc bytes=%zd\n",
sizeof(*_aios));
*/
/* This should never happen, so abort early if it ever does. */
if (sgs_per_dev && num_par_pages) {
ORE_DBGMSG("Tried to use both pages and sglist\n");
*pios = NULL;
return -EINVAL;
}
if (numdevs > (INT_MAX - sizeof(*ios)) /
sizeof(struct ore_per_dev_state))
return -ENOMEM;
size_ios = sizeof(*ios) + sizeof(struct ore_per_dev_state) * numdevs;
if (sgs_per_dev * numdevs > INT_MAX / sizeof(struct osd_sg_entry))
return -ENOMEM;
if (num_par_pages > INT_MAX / sizeof(struct page *))
return -ENOMEM;
size_extra = max(sizeof(struct osd_sg_entry) * (sgs_per_dev * numdevs),
sizeof(struct page *) * num_par_pages);
size_total = size_ios + size_extra;
if (likely(size_total <= PAGE_SIZE)) {
ios = kzalloc(size_total, GFP_KERNEL);
if (unlikely(!ios)) {
ORE_DBGMSG("Failed kzalloc bytes=%zd\n", size_total);
*pios = NULL;
return -ENOMEM;
}
pages = num_par_pages ? _aios->pages : NULL;
sgilist = sgs_per_dev ? _aios->sglist : NULL;
ios = &_aios->ios;
ios_extra = (char *)ios + size_ios;
} else {
struct __alloc_small_io_state {
struct ore_io_state ios;
struct ore_per_dev_state per_dev[numdevs];
} *_aio_small;
union __extra_part {
struct osd_sg_entry sglist[sgs_per_dev * numdevs];
struct page *pages[num_par_pages];
} *extra_part;
_aio_small = kzalloc(sizeof(*_aio_small), GFP_KERNEL);
if (unlikely(!_aio_small)) {
ios = kzalloc(size_ios, GFP_KERNEL);
if (unlikely(!ios)) {
ORE_DBGMSG("Failed alloc first part bytes=%zd\n",
sizeof(*_aio_small));
size_ios);
*pios = NULL;
return -ENOMEM;
}
extra_part = kzalloc(sizeof(*extra_part), GFP_KERNEL);
if (unlikely(!extra_part)) {
ios_extra = kzalloc(size_extra, GFP_KERNEL);
if (unlikely(!ios_extra)) {
ORE_DBGMSG("Failed alloc second part bytes=%zd\n",
sizeof(*extra_part));
kfree(_aio_small);
size_extra);
kfree(ios);
*pios = NULL;
return -ENOMEM;
}
pages = num_par_pages ? extra_part->pages : NULL;
sgilist = sgs_per_dev ? extra_part->sglist : NULL;
/* In this case the per_dev[0].sgilist holds the pointer to
* be freed
*/
ios = &_aio_small->ios;
ios->extra_part_alloc = true;
}
if (pages) {
ios->parity_pages = pages;
if (num_par_pages) {
ios->parity_pages = ios_extra;
ios->max_par_pages = num_par_pages;
}
if (sgilist) {
if (sgs_per_dev) {
struct osd_sg_entry *sgilist = ios_extra;
unsigned d;
for (d = 0; d < numdevs; ++d) {

75
fs/exofs/ore_raid.c
View File

@ -71,6 +71,11 @@ static int _sp2d_alloc(unsigned pages_in_unit, unsigned group_width,
{
struct __stripe_pages_2d *sp2d;
unsigned data_devs = group_width - parity;
/*
* Desired allocation layout is, though when larger than PAGE_SIZE,
* each struct __alloc_1p_arrays is separately allocated:
struct _alloc_all_bytes {
struct __alloc_stripe_pages_2d {
struct __stripe_pages_2d sp2d;
@ -82,55 +87,85 @@ static int _sp2d_alloc(unsigned pages_in_unit, unsigned group_width,
char page_is_read[data_devs];
} __a1pa[pages_in_unit];
} *_aab;
struct __alloc_1p_arrays *__a1pa;
struct __alloc_1p_arrays *__a1pa_end;
const unsigned sizeof__a1pa = sizeof(_aab->__a1pa[0]);
*/
char *__a1pa;
char *__a1pa_end;
const size_t sizeof_stripe_pages_2d =
sizeof(struct __stripe_pages_2d) +
sizeof(struct __1_page_stripe) * pages_in_unit;
const size_t sizeof__a1pa =
ALIGN(sizeof(struct page *) * (2 * group_width) + data_devs,
sizeof(void *));
const size_t sizeof__a1pa_arrays = sizeof__a1pa * pages_in_unit;
const size_t alloc_total = sizeof_stripe_pages_2d +
sizeof__a1pa_arrays;
unsigned num_a1pa, alloc_size, i;
/* FIXME: check these numbers in ore_verify_layout */
BUG_ON(sizeof(_aab->__asp2d) > PAGE_SIZE);
BUG_ON(sizeof_stripe_pages_2d > PAGE_SIZE);
BUG_ON(sizeof__a1pa > PAGE_SIZE);
if (sizeof(*_aab) > PAGE_SIZE) {
num_a1pa = (PAGE_SIZE - sizeof(_aab->__asp2d)) / sizeof__a1pa;
alloc_size = sizeof(_aab->__asp2d) + sizeof__a1pa * num_a1pa;
/*
* If alloc_total would be larger than PAGE_SIZE, only allocate
* as many a1pa items as would fill the rest of the page, instead
* of the full pages_in_unit count.
*/
if (alloc_total > PAGE_SIZE) {
num_a1pa = (PAGE_SIZE - sizeof_stripe_pages_2d) / sizeof__a1pa;
alloc_size = sizeof_stripe_pages_2d + sizeof__a1pa * num_a1pa;
} else {
num_a1pa = pages_in_unit;
alloc_size = sizeof(*_aab);
alloc_size = alloc_total;
}
_aab = kzalloc(alloc_size, GFP_KERNEL);
if (unlikely(!_aab)) {
*psp2d = sp2d = kzalloc(alloc_size, GFP_KERNEL);
if (unlikely(!sp2d)) {
ORE_DBGMSG("!! Failed to alloc sp2d size=%d\n", alloc_size);
return -ENOMEM;
}
/* From here Just call _sp2d_free */
sp2d = &_aab->__asp2d.sp2d;
*psp2d = sp2d; /* From here Just call _sp2d_free */
__a1pa = _aab->__a1pa;
__a1pa_end = __a1pa + num_a1pa;
/* Find start of a1pa area. */
__a1pa = (char *)sp2d + sizeof_stripe_pages_2d;
/* Find end of the _allocated_ a1pa area. */
__a1pa_end = __a1pa + alloc_size;
/* Allocate additionally needed a1pa items in PAGE_SIZE chunks. */
for (i = 0; i < pages_in_unit; ++i) {
struct __1_page_stripe *stripe = &sp2d->_1p_stripes[i];
if (unlikely(__a1pa >= __a1pa_end)) {
num_a1pa = min_t(unsigned, PAGE_SIZE / sizeof__a1pa,
pages_in_unit - i);
alloc_size = sizeof__a1pa * num_a1pa;
__a1pa = kcalloc(num_a1pa, sizeof__a1pa, GFP_KERNEL);
__a1pa = kzalloc(alloc_size, GFP_KERNEL);
if (unlikely(!__a1pa)) {
ORE_DBGMSG("!! Failed to _alloc_1p_arrays=%d\n",
num_a1pa);
return -ENOMEM;
}
__a1pa_end = __a1pa + num_a1pa;
__a1pa_end = __a1pa + alloc_size;
/* First *pages is marked for kfree of the buffer */
sp2d->_1p_stripes[i].alloc = true;
stripe->alloc = true;
}
sp2d->_1p_stripes[i].pages = __a1pa->pages;
sp2d->_1p_stripes[i].scribble = __a1pa->scribble ;
sp2d->_1p_stripes[i].page_is_read = __a1pa->page_is_read;
++__a1pa;
/*
* Attach all _lp_stripes pointers to the allocation for
* it which was either part of the original PAGE_SIZE
* allocation or the subsequent allocation in this loop.
*/
stripe->pages = (void *)__a1pa;
stripe->scribble = stripe->pages + group_width;
stripe->page_is_read = (char *)stripe->scribble + group_width;
__a1pa += sizeof__a1pa;
}
sp2d->parity = parity;

23
fs/exofs/super.c
View File

@ -549,27 +549,26 @@ static int exofs_devs_2_odi(struct exofs_dt_device_info *dt_dev,
static int __alloc_dev_table(struct exofs_sb_info *sbi, unsigned numdevs,
struct exofs_dev **peds)
{
struct __alloc_ore_devs_and_exofs_devs {
/* Twice bigger table: See exofs_init_comps() and comment at
* exofs_read_lookup_dev_table()
*/
struct ore_dev *oreds[numdevs * 2 - 1];
struct exofs_dev eds[numdevs];
} *aoded;
/* Twice bigger table: See exofs_init_comps() and comment at
* exofs_read_lookup_dev_table()
*/
const size_t numores = numdevs * 2 - 1;
struct exofs_dev *eds;
unsigned i;
aoded = kzalloc(sizeof(*aoded), GFP_KERNEL);
if (unlikely(!aoded)) {
sbi->oc.ods = kzalloc(numores * sizeof(struct ore_dev *) +
numdevs * sizeof(struct exofs_dev), GFP_KERNEL);
if (unlikely(!sbi->oc.ods)) {
EXOFS_ERR("ERROR: failed allocating Device array[%d]\n",
numdevs);
return -ENOMEM;
}
sbi->oc.ods = aoded->oreds;
*peds = eds = aoded->eds;
/* Start of allocated struct exofs_dev entries */
*peds = eds = (void *)sbi->oc.ods[numores];
/* Initialize pointers into struct exofs_dev */
for (i = 0; i < numdevs; ++i)
aoded->oreds[i] = &eds[i].ored;
sbi->oc.ods[i] = &eds[i].ored;
return 0;
}

8
fs/fat/inode.c
View File

@ -158,8 +158,14 @@ static inline int __fat_get_block(struct inode *inode, sector_t iblock,
err = fat_bmap(inode, iblock, &phys, &mapped_blocks, create, false);
if (err)
return err;
if (!phys) {
fat_fs_error(sb,
"invalid FAT chain (i_pos %lld, last_block %llu)",
MSDOS_I(inode)->i_pos,
(unsigned long long)last_block);
return -EIO;
}
BUG_ON(!phys);
BUG_ON(*max_blocks != mapped_blocks);
set_buffer_new(bh_result);
map_bh(bh_result, sb, phys);

9
fs/proc/base.c
View File

@ -2439,14 +2439,11 @@ static struct dentry *proc_pident_lookup(struct inode *dir,
for (p = ents; p < last; p++) {
if (p->len != dentry->d_name.len)
continue;
if (!memcmp(dentry->d_name.name, p->name, p->len))
if (!memcmp(dentry->d_name.name, p->name, p->len)) {
res = proc_pident_instantiate(dentry, task, p);
break;
}
}
if (p >= last)
goto out;
res = proc_pident_instantiate(dentry, task, p);
out:
put_task_struct(task);
out_no_task:
return res;

14
include/linux/kcov.h
View File

@ -22,13 +22,27 @@ enum kcov_mode {
KCOV_MODE_TRACE_CMP = 3,
};
#define KCOV_IN_CTXSW (1 << 30)
void kcov_task_init(struct task_struct *t);
void kcov_task_exit(struct task_struct *t);
#define kcov_prepare_switch(t) \
do { \
(t)->kcov_mode |= KCOV_IN_CTXSW; \
} while (0)
#define kcov_finish_switch(t) \
do { \
(t)->kcov_mode &= ~KCOV_IN_CTXSW; \
} while (0)
#else
static inline void kcov_task_init(struct task_struct *t) {}
static inline void kcov_task_exit(struct task_struct *t) {}
static inline void kcov_prepare_switch(struct task_struct *t) {}
static inline void kcov_finish_switch(struct task_struct *t) {}
#endif /* CONFIG_KCOV */
#endif /* _LINUX_KCOV_H */

26
include/linux/memcontrol.h
View File

@ -53,6 +53,7 @@ enum memcg_memory_event {
MEMCG_HIGH,
MEMCG_MAX,
MEMCG_OOM,
MEMCG_OOM_KILL,
MEMCG_SWAP_MAX,
MEMCG_SWAP_FAIL,
MEMCG_NR_MEMORY_EVENTS,
@ -720,11 +721,8 @@ static inline void count_memcg_event_mm(struct mm_struct *mm,
rcu_read_lock();
memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
if (likely(memcg)) {
if (likely(memcg))
count_memcg_events(memcg, idx, 1);
if (idx == OOM_KILL)
cgroup_file_notify(&memcg->events_file);
}
rcu_read_unlock();
}
@ -735,6 +733,21 @@ static inline void memcg_memory_event(struct mem_cgroup *memcg,
cgroup_file_notify(&memcg->events_file);
}
static inline void memcg_memory_event_mm(struct mm_struct *mm,
enum memcg_memory_event event)
{
struct mem_cgroup *memcg;
if (mem_cgroup_disabled())
return;
rcu_read_lock();
memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
if (likely(memcg))
memcg_memory_event(memcg, event);
rcu_read_unlock();
}
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
void mem_cgroup_split_huge_fixup(struct page *head);
#endif
@ -756,6 +769,11 @@ static inline void memcg_memory_event(struct mem_cgroup *memcg,
{
}
static inline void memcg_memory_event_mm(struct mm_struct *mm,
enum memcg_memory_event event)
{
}
static inline enum mem_cgroup_protection mem_cgroup_protected(
struct mem_cgroup *root, struct mem_cgroup *memcg)
{

2
include/linux/sched.h
View File

@ -1130,7 +1130,7 @@ struct task_struct {
#ifdef CONFIG_KCOV
/* Coverage collection mode enabled for this task (0 if disabled): */
enum kcov_mode kcov_mode;
unsigned int kcov_mode;
/* Size of the kcov_area: */
unsigned int kcov_size;

1
include/linux/slab.h
View File

@ -600,6 +600,7 @@ struct memcg_cache_params {
struct memcg_cache_array __rcu *memcg_caches;
struct list_head __root_caches_node;
struct list_head children;
bool dying;
};
struct {
struct mem_cgroup *memcg;

18
ipc/sem.c
View File

@ -85,6 +85,7 @@
#include <linux/nsproxy.h>
#include <linux/ipc_namespace.h>
#include <linux/sched/wake_q.h>
#include <linux/nospec.h>
#include <linux/uaccess.h>
#include "util.h"
@ -368,6 +369,7 @@ static inline int sem_lock(struct sem_array *sma, struct sembuf *sops,
int nsops)
{
struct sem *sem;
int idx;
if (nsops != 1) {
/* Complex operation - acquire a full lock */
@ -385,7 +387,8 @@ static inline int sem_lock(struct sem_array *sma, struct sembuf *sops,
*
* Both facts are tracked by use_global_mode.
*/
sem = &sma->sems[sops->sem_num];
idx = array_index_nospec(sops->sem_num, sma->sem_nsems);
sem = &sma->sems[idx];
/*
* Initial check for use_global_lock. Just an optimization,
@ -638,7 +641,8 @@ static int perform_atomic_semop_slow(struct sem_array *sma, struct sem_queue *q)
un = q->undo;
for (sop = sops; sop < sops + nsops; sop++) {
curr = &sma->sems[sop->sem_num];
int idx = array_index_nospec(sop->sem_num, sma->sem_nsems);
curr = &sma->sems[idx];
sem_op = sop->sem_op;
result = curr->semval;
@ -718,7 +722,9 @@ static int perform_atomic_semop(struct sem_array *sma, struct sem_queue *q)
* until the operations can go through.
*/
for (sop = sops; sop < sops + nsops; sop++) {
curr = &sma->sems[sop->sem_num];
int idx = array_index_nospec(sop->sem_num, sma->sem_nsems);
curr = &sma->sems[idx];
sem_op = sop->sem_op;
result = curr->semval;
@ -1356,6 +1362,7 @@ static int semctl_setval(struct ipc_namespace *ns, int semid, int semnum,
return -EIDRM;
}
semnum = array_index_nospec(semnum, sma->sem_nsems);
curr = &sma->sems[semnum];
ipc_assert_locked_object(&sma->sem_perm);
@ -1509,6 +1516,8 @@ static int semctl_main(struct ipc_namespace *ns, int semid, int semnum,
err = -EIDRM;
goto out_unlock;
}
semnum = array_index_nospec(semnum, nsems);
curr = &sma->sems[semnum];
switch (cmd) {
@ -2081,7 +2090,8 @@ static long do_semtimedop(int semid, struct sembuf __user *tsops,
*/
if (nsops == 1) {
struct sem *curr;
curr = &sma->sems[sops->sem_num];
int idx = array_index_nospec(sops->sem_num, sma->sem_nsems);
curr = &sma->sems[idx];
if (alter) {
if (sma->complex_count) {

2
ipc/shm.c
View File

@ -408,7 +408,7 @@ void exit_shm(struct task_struct *task)
up_write(&shm_ids(ns).rwsem);
}
static int shm_fault(struct vm_fault *vmf)
static vm_fault_t shm_fault(struct vm_fault *vmf)
{
struct file *file = vmf->vma->vm_file;
struct shm_file_data *sfd = shm_file_data(file);

8
kernel/fork.c
View File

@ -440,6 +440,14 @@ static __latent_entropy int dup_mmap(struct mm_struct *mm,
continue;
}
charge = 0;
/*
* Don't duplicate many vmas if we've been oom-killed (for
* example)
*/
if (fatal_signal_pending(current)) {
retval = -EINTR;
goto out;
}
if (mpnt->vm_flags & VM_ACCOUNT) {
unsigned long len = vma_pages(mpnt);

21
kernel/kcov.c
View File

@ -58,7 +58,7 @@ struct kcov {
static bool check_kcov_mode(enum kcov_mode needed_mode, struct task_struct *t)
{
enum kcov_mode mode;
unsigned int mode;
/*
* We are interested in code coverage as a function of a syscall inputs,
@ -241,7 +241,8 @@ static void kcov_put(struct kcov *kcov)
void kcov_task_init(struct task_struct *t)
{
t->kcov_mode = KCOV_MODE_DISABLED;
WRITE_ONCE(t->kcov_mode, KCOV_MODE_DISABLED);
barrier();
t->kcov_size = 0;
t->kcov_area = NULL;
t->kcov = NULL;
@ -323,6 +324,21 @@ static int kcov_close(struct inode *inode, struct file *filep)
return 0;
}
/*
* Fault in a lazily-faulted vmalloc area before it can be used by
* __santizer_cov_trace_pc(), to avoid recursion issues if any code on the
* vmalloc fault handling path is instrumented.
*/
static void kcov_fault_in_area(struct kcov *kcov)
{
unsigned long stride = PAGE_SIZE / sizeof(unsigned long);
unsigned long *area = kcov->area;
unsigned long offset;
for (offset = 0; offset < kcov->size; offset += stride)
READ_ONCE(area[offset]);
}
static int kcov_ioctl_locked(struct kcov *kcov, unsigned int cmd,
unsigned long arg)
{
@ -371,6 +387,7 @@ static int kcov_ioctl_locked(struct kcov *kcov, unsigned int cmd,
#endif
else
return -EINVAL;
kcov_fault_in_area(kcov);
/* Cache in task struct for performance. */
t->kcov_size = kcov->size;
t->kcov_area = kcov->area;

4
kernel/kexec_core.c
View File

@ -829,6 +829,8 @@ static int kimage_load_normal_segment(struct kimage *image,
else
buf += mchunk;
mbytes -= mchunk;
cond_resched();
}
out:
return result;
@ -893,6 +895,8 @@ static int kimage_load_crash_segment(struct kimage *image,
else
buf += mchunk;
mbytes -= mchunk;
cond_resched();
}
out:
return result;

2
kernel/relay.c
View File

@ -39,7 +39,7 @@ static void relay_file_mmap_close(struct vm_area_struct *vma)
/*
* fault() vm_op implementation for relay file mapping.
*/
static int relay_buf_fault(struct vm_fault *vmf)
static vm_fault_t relay_buf_fault(struct vm_fault *vmf)
{
struct page *page;
struct rchan_buf *buf = vmf->vma->vm_private_data;

4
kernel/sched/core.c
View File

@ -10,6 +10,8 @@
#include <linux/kthread.h>
#include <linux/nospec.h>
#include <linux/kcov.h>
#include <asm/switch_to.h>
#include <asm/tlb.h>
@ -2633,6 +2635,7 @@ static inline void
prepare_task_switch(struct rq *rq, struct task_struct *prev,
struct task_struct *next)
{
kcov_prepare_switch(prev);
sched_info_switch(rq, prev, next);
perf_event_task_sched_out(prev, next);
rseq_preempt(prev);
@ -2702,6 +2705,7 @@ static struct rq *finish_task_switch(struct task_struct *prev)
finish_task(prev);
finish_lock_switch(rq);
finish_arch_post_lock_switch();
kcov_finish_switch(current);
fire_sched_in_preempt_notifiers(current);
/*

36
lib/Kconfig.debug
View File

@ -1506,6 +1506,10 @@ config NETDEV_NOTIFIER_ERROR_INJECT
If unsure, say N.
config FUNCTION_ERROR_INJECTION
def_bool y
depends on HAVE_FUNCTION_ERROR_INJECTION && KPROBES
config FAULT_INJECTION
bool "Fault-injection framework"
depends on DEBUG_KERNEL
@ -1513,10 +1517,6 @@ config FAULT_INJECTION
Provide fault-injection framework.
For more details, see Documentation/fault-injection/.
config FUNCTION_ERROR_INJECTION
def_bool y
depends on HAVE_FUNCTION_ERROR_INJECTION && KPROBES
config FAILSLAB
bool "Fault-injection capability for kmalloc"
depends on FAULT_INJECTION
@ -1547,16 +1547,6 @@ config FAIL_IO_TIMEOUT
Only works with drivers that use the generic timeout handling,
for others it wont do anything.
config FAIL_MMC_REQUEST
bool "Fault-injection capability for MMC IO"
depends on FAULT_INJECTION_DEBUG_FS && MMC
help
Provide fault-injection capability for MMC IO.
This will make the mmc core return data errors. This is
useful to test the error handling in the mmc block device
and to test how the mmc host driver handles retries from
the block device.
config FAIL_FUTEX
bool "Fault-injection capability for futexes"
select DEBUG_FS
@ -1564,6 +1554,12 @@ config FAIL_FUTEX
help
Provide fault-injection capability for futexes.
config FAULT_INJECTION_DEBUG_FS
bool "Debugfs entries for fault-injection capabilities"
depends on FAULT_INJECTION && SYSFS && DEBUG_FS
help
Enable configuration of fault-injection capabilities via debugfs.
config FAIL_FUNCTION
bool "Fault-injection capability for functions"
depends on FAULT_INJECTION_DEBUG_FS && FUNCTION_ERROR_INJECTION
@ -1574,11 +1570,15 @@ config FAIL_FUNCTION
an error value and have to handle it. This is useful to test the
error handling in various subsystems.
config FAULT_INJECTION_DEBUG_FS
bool "Debugfs entries for fault-injection capabilities"
depends on FAULT_INJECTION && SYSFS && DEBUG_FS
config FAIL_MMC_REQUEST
bool "Fault-injection capability for MMC IO"
depends on FAULT_INJECTION_DEBUG_FS && MMC
help
Enable configuration of fault-injection capabilities via debugfs.
Provide fault-injection capability for MMC IO.
This will make the mmc core return data errors. This is
useful to test the error handling in the mmc block device
and to test how the mmc host driver handles retries from
the block device.
config FAULT_INJECTION_STACKTRACE_FILTER
bool "stacktrace filter for fault-injection capabilities"

7
lib/test_printf.c
View File

@ -260,6 +260,13 @@ plain(void)
{
int err;
/*
* Make sure crng is ready. Otherwise we get "(ptrval)" instead
* of a hashed address when printing '%p' in plain_hash() and
* plain_format().
*/
wait_for_random_bytes();
err = plain_hash();
if (err) {
pr_warn("plain 'p' does not appear to be hashed\n");

10
mm/cleancache.c
View File

@ -307,12 +307,10 @@ static int __init init_cleancache(void)
struct dentry *root = debugfs_create_dir("cleancache", NULL);
if (root == NULL)
return -ENXIO;
debugfs_create_u64("succ_gets", S_IRUGO, root, &cleancache_succ_gets);
debugfs_create_u64("failed_gets", S_IRUGO,
root, &cleancache_failed_gets);
debugfs_create_u64("puts", S_IRUGO, root, &cleancache_puts);
debugfs_create_u64("invalidates", S_IRUGO,
root, &cleancache_invalidates);
debugfs_create_u64("succ_gets", 0444, root, &cleancache_succ_gets);
debugfs_create_u64("failed_gets", 0444, root, &cleancache_failed_gets);
debugfs_create_u64("puts", 0444, root, &cleancache_puts);
debugfs_create_u64("invalidates", 0444, root, &cleancache_invalidates);
#endif
return 0;
}

25
mm/cma_debug.c
View File

@ -172,23 +172,18 @@ static void cma_debugfs_add_one(struct cma *cma, int idx)
tmp = debugfs_create_dir(name, cma_debugfs_root);
debugfs_create_file("alloc", S_IWUSR, tmp, cma,
&cma_alloc_fops);
debugfs_create_file("free", S_IWUSR, tmp, cma,
&cma_free_fops);
debugfs_create_file("base_pfn", S_IRUGO, tmp,
&cma->base_pfn, &cma_debugfs_fops);
debugfs_create_file("count", S_IRUGO, tmp,
&cma->count, &cma_debugfs_fops);
debugfs_create_file("order_per_bit", S_IRUGO, tmp,
&cma->order_per_bit, &cma_debugfs_fops);
debugfs_create_file("used", S_IRUGO, tmp, cma, &cma_used_fops);
debugfs_create_file("maxchunk", S_IRUGO, tmp, cma, &cma_maxchunk_fops);
debugfs_create_file("alloc", 0200, tmp, cma, &cma_alloc_fops);
debugfs_create_file("free", 0200, tmp, cma, &cma_free_fops);
debugfs_create_file("base_pfn", 0444, tmp,
&cma->base_pfn, &cma_debugfs_fops);
debugfs_create_file("count", 0444, tmp, &cma->count, &cma_debugfs_fops);
debugfs_create_file("order_per_bit", 0444, tmp,
&cma->order_per_bit, &cma_debugfs_fops);
debugfs_create_file("used", 0444, tmp, cma, &cma_used_fops);
debugfs_create_file("maxchunk", 0444, tmp, cma, &cma_maxchunk_fops);
u32s = DIV_ROUND_UP(cma_bitmap_maxno(cma), BITS_PER_BYTE * sizeof(u32));
debugfs_create_u32_array("bitmap", S_IRUGO, tmp, (u32*)cma->bitmap, u32s);
debugfs_create_u32_array("bitmap", 0444, tmp, (u32 *)cma->bitmap, u32s);
}
static int __init cma_debugfs_init(void)

2
mm/compaction.c
View File

@ -1899,7 +1899,7 @@ static ssize_t sysfs_compact_node(struct device *dev,
return count;
}
static DEVICE_ATTR(compact, S_IWUSR, NULL, sysfs_compact_node);
static DEVICE_ATTR(compact, 0200, NULL, sysfs_compact_node);
int compaction_register_node(struct node *node)
{

2
mm/dmapool.c
View File

@ -105,7 +105,7 @@ show_pools(struct device *dev, struct device_attribute *attr, char *buf)
return PAGE_SIZE - size;
}
static DEVICE_ATTR(pools, S_IRUGO, show_pools, NULL);
static DEVICE_ATTR(pools, 0444, show_pools, NULL);
/**
* dma_pool_create - Creates a pool of consistent memory blocks, for dma.

2
mm/failslab.c
View File

@ -42,7 +42,7 @@ __setup("failslab=", setup_failslab);
static int __init failslab_debugfs_init(void)
{
struct dentry *dir;
umode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
umode_t mode = S_IFREG | 0600;
dir = fault_create_debugfs_attr("failslab", NULL, &failslab.attr);
if (IS_ERR(dir))

11
mm/frontswap.c
View File

@ -486,12 +486,11 @@ static int __init init_frontswap(void)
struct dentry *root = debugfs_create_dir("frontswap", NULL);
if (root == NULL)
return -ENXIO;
debugfs_create_u64("loads", S_IRUGO, root, &frontswap_loads);
debugfs_create_u64("succ_stores", S_IRUGO, root, &frontswap_succ_stores);
debugfs_create_u64("failed_stores", S_IRUGO, root,
&frontswap_failed_stores);
debugfs_create_u64("invalidates", S_IRUGO,
root, &frontswap_invalidates);
debugfs_create_u64("loads", 0444, root, &frontswap_loads);
debugfs_create_u64("succ_stores", 0444, root, &frontswap_succ_stores);
debugfs_create_u64("failed_stores", 0444, root,
&frontswap_failed_stores);
debugfs_create_u64("invalidates", 0444, root, &frontswap_invalidates);
#endif
return 0;
}

14
mm/ksm.c
View File

@ -216,6 +216,8 @@ struct rmap_item {
#define SEQNR_MASK 0x0ff /* low bits of unstable tree seqnr */
#define UNSTABLE_FLAG 0x100 /* is a node of the unstable tree */
#define STABLE_FLAG 0x200 /* is listed from the stable tree */
#define KSM_FLAG_MASK (SEQNR_MASK|UNSTABLE_FLAG|STABLE_FLAG)
/* to mask all the flags */
/* The stable and unstable tree heads */
static struct rb_root one_stable_tree[1] = { RB_ROOT };
@ -2598,10 +2600,15 @@ again:
anon_vma_lock_read(anon_vma);
anon_vma_interval_tree_foreach(vmac, &anon_vma->rb_root,
0, ULONG_MAX) {
unsigned long addr;
cond_resched();
vma = vmac->vma;
if (rmap_item->address < vma->vm_start ||
rmap_item->address >= vma->vm_end)
/* Ignore the stable/unstable/sqnr flags */
addr = rmap_item->address & ~KSM_FLAG_MASK;
if (addr < vma->vm_start || addr >= vma->vm_end)
continue;
/*
* Initially we examine only the vma which covers this
@ -2615,8 +2622,7 @@ again:
if (rwc->invalid_vma && rwc->invalid_vma(vma, rwc->arg))
continue;
if (!rwc->rmap_one(page, vma,
rmap_item->address, rwc->arg)) {
if (!rwc->rmap_one(page, vma, addr, rwc->arg)) {
anon_vma_unlock_read(anon_vma);
return;
}

10
mm/memblock.c
View File

@ -20,6 +20,7 @@
#include <linux/kmemleak.h>
#include <linux/seq_file.h>
#include <linux/memblock.h>
#include <linux/bootmem.h>
#include <asm/sections.h>
#include <linux/io.h>
@ -1808,10 +1809,13 @@ static int __init memblock_init_debugfs(void)
struct dentry *root = debugfs_create_dir("memblock", NULL);
if (!root)
return -ENXIO;
debugfs_create_file("memory", S_IRUGO, root, &memblock.memory, &memblock_debug_fops);
debugfs_create_file("reserved", S_IRUGO, root, &memblock.reserved, &memblock_debug_fops);
debugfs_create_file("memory", 0444, root,
&memblock.memory, &memblock_debug_fops);
debugfs_create_file("reserved", 0444, root,
&memblock.reserved, &memblock_debug_fops);
#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
debugfs_create_file("physmem", S_IRUGO, root, &memblock.physmem, &memblock_debug_fops);
debugfs_create_file("physmem", 0444, root,
&memblock.physmem, &memblock_debug_fops);
#endif
return 0;

10
mm/memcontrol.c
View File

@ -3550,7 +3550,8 @@ static int mem_cgroup_oom_control_read(struct seq_file *sf, void *v)
seq_printf(sf, "oom_kill_disable %d\n", memcg->oom_kill_disable);
seq_printf(sf, "under_oom %d\n", (bool)memcg->under_oom);
seq_printf(sf, "oom_kill %lu\n", memcg_sum_events(memcg, OOM_KILL));
seq_printf(sf, "oom_kill %lu\n",
atomic_long_read(&memcg->memory_events[MEMCG_OOM_KILL]));
return 0;
}
@ -5239,7 +5240,8 @@ static int memory_events_show(struct seq_file *m, void *v)
atomic_long_read(&memcg->memory_events[MEMCG_MAX]));
seq_printf(m, "oom %lu\n",
atomic_long_read(&memcg->memory_events[MEMCG_OOM]));
seq_printf(m, "oom_kill %lu\n", memcg_sum_events(memcg, OOM_KILL));
seq_printf(m, "oom_kill %lu\n",
atomic_long_read(&memcg->memory_events[MEMCG_OOM_KILL]));
return 0;
}
@ -5480,6 +5482,10 @@ enum mem_cgroup_protection mem_cgroup_protected(struct mem_cgroup *root,
elow = memcg->memory.low;
parent = parent_mem_cgroup(memcg);
/* No parent means a non-hierarchical mode on v1 memcg */
if (!parent)
return MEMCG_PROT_NONE;
if (parent == root)
goto exit;

4
mm/mremap.c
View File

@ -191,8 +191,6 @@ static void move_ptes(struct vm_area_struct *vma, pmd_t *old_pmd,
drop_rmap_locks(vma);
}
#define LATENCY_LIMIT (64 * PAGE_SIZE)
unsigned long move_page_tables(struct vm_area_struct *vma,
unsigned long old_addr, struct vm_area_struct *new_vma,
unsigned long new_addr, unsigned long len,
@ -247,8 +245,6 @@ unsigned long move_page_tables(struct vm_area_struct *vma,
next = (new_addr + PMD_SIZE) & PMD_MASK;
if (extent > next - new_addr)
extent = next - new_addr;
if (extent > LATENCY_LIMIT)
extent = LATENCY_LIMIT;
move_ptes(vma, old_pmd, old_addr, old_addr + extent, new_vma,
new_pmd, new_addr, need_rmap_locks, &need_flush);
}

2
mm/oom_kill.c
View File

@ -913,7 +913,7 @@ static void oom_kill_process(struct oom_control *oc, const char *message)
/* Raise event before sending signal: task reaper must see this */
count_vm_event(OOM_KILL);
count_memcg_event_mm(mm, OOM_KILL);
memcg_memory_event_mm(mm, MEMCG_OOM_KILL);
/*
* We should send SIGKILL before granting access to memory reserves

2
mm/page_alloc.c
View File

@ -3061,7 +3061,7 @@ static bool should_fail_alloc_page(gfp_t gfp_mask, unsigned int order)
static int __init fail_page_alloc_debugfs(void)
{
umode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
umode_t mode = S_IFREG | 0600;
struct dentry *dir;
dir = fault_create_debugfs_attr("fail_page_alloc", NULL,

2
mm/page_idle.c
View File

@ -201,7 +201,7 @@ static ssize_t page_idle_bitmap_write(struct file *file, struct kobject *kobj,
}
static struct bin_attribute page_idle_bitmap_attr =
__BIN_ATTR(bitmap, S_IRUSR | S_IWUSR,
__BIN_ATTR(bitmap, 0600,
page_idle_bitmap_read, page_idle_bitmap_write, 0);
static struct bin_attribute *page_idle_bin_attrs[] = {

4
mm/page_owner.c
View File

@ -631,8 +631,8 @@ static int __init pageowner_init(void)
return 0;
}
dentry = debugfs_create_file("page_owner", S_IRUSR, NULL,
NULL, &proc_page_owner_operations);
dentry = debugfs_create_file("page_owner", 0400, NULL,
NULL, &proc_page_owner_operations);
return PTR_ERR_OR_ZERO(dentry);
}

9
mm/shmem.c
View File

@ -3013,7 +3013,8 @@ static int shmem_symlink(struct inode *dir, struct dentry *dentry, const char *s
if (len > PAGE_SIZE)
return -ENAMETOOLONG;
inode = shmem_get_inode(dir->i_sb, dir, S_IFLNK|S_IRWXUGO, 0, VM_NORESERVE);
inode = shmem_get_inode(dir->i_sb, dir, S_IFLNK | 0777, 0,
VM_NORESERVE);
if (!inode)
return -ENOSPC;
@ -3445,7 +3446,7 @@ static int shmem_show_options(struct seq_file *seq, struct dentry *root)
sbinfo->max_blocks << (PAGE_SHIFT - 10));
if (sbinfo->max_inodes != shmem_default_max_inodes())
seq_printf(seq, ",nr_inodes=%lu", sbinfo->max_inodes);
if (sbinfo->mode != (S_IRWXUGO | S_ISVTX))
if (sbinfo->mode != (0777 | S_ISVTX))
seq_printf(seq, ",mode=%03ho", sbinfo->mode);
if (!uid_eq(sbinfo->uid, GLOBAL_ROOT_UID))
seq_printf(seq, ",uid=%u",
@ -3486,7 +3487,7 @@ int shmem_fill_super(struct super_block *sb, void *data, int silent)
if (!sbinfo)
return -ENOMEM;
sbinfo->mode = S_IRWXUGO | S_ISVTX;
sbinfo->mode = 0777 | S_ISVTX;
sbinfo->uid = current_fsuid();
sbinfo->gid = current_fsgid();
sb->s_fs_info = sbinfo;
@ -3929,7 +3930,7 @@ static struct file *__shmem_file_setup(struct vfsmount *mnt, const char *name, l
d_set_d_op(path.dentry, &anon_ops);
res = ERR_PTR(-ENOSPC);
inode = shmem_get_inode(sb, NULL, S_IFREG | S_IRWXUGO, 0, flags);
inode = shmem_get_inode(sb, NULL, S_IFREG | 0777, 0, flags);
if (!inode)
goto put_memory;

37
mm/slab_common.c
View File

@ -136,6 +136,7 @@ void slab_init_memcg_params(struct kmem_cache *s)
s->memcg_params.root_cache = NULL;
RCU_INIT_POINTER(s->memcg_params.memcg_caches, NULL);
INIT_LIST_HEAD(&s->memcg_params.children);
s->memcg_params.dying = false;
}
static int init_memcg_params(struct kmem_cache *s,
@ -608,7 +609,7 @@ void memcg_create_kmem_cache(struct mem_cgroup *memcg,
* The memory cgroup could have been offlined while the cache
* creation work was pending.
*/
if (memcg->kmem_state != KMEM_ONLINE)
if (memcg->kmem_state != KMEM_ONLINE || root_cache->memcg_params.dying)
goto out_unlock;
idx = memcg_cache_id(memcg);
@ -712,6 +713,9 @@ void slab_deactivate_memcg_cache_rcu_sched(struct kmem_cache *s,
WARN_ON_ONCE(s->memcg_params.deact_fn))
return;
if (s->memcg_params.root_cache->memcg_params.dying)
return;
/* pin memcg so that @s doesn't get destroyed in the middle */
css_get(&s->memcg_params.memcg->css);
@ -823,11 +827,36 @@ static int shutdown_memcg_caches(struct kmem_cache *s)
return -EBUSY;
return 0;
}
static void flush_memcg_workqueue(struct kmem_cache *s)
{
mutex_lock(&slab_mutex);
s->memcg_params.dying = true;
mutex_unlock(&slab_mutex);
/*
* SLUB deactivates the kmem_caches through call_rcu_sched. Make
* sure all registered rcu callbacks have been invoked.
*/
if (IS_ENABLED(CONFIG_SLUB))
rcu_barrier_sched();
/*
* SLAB and SLUB create memcg kmem_caches through workqueue and SLUB
* deactivates the memcg kmem_caches through workqueue. Make sure all
* previous workitems on workqueue are processed.
*/
flush_workqueue(memcg_kmem_cache_wq);
}
#else
static inline int shutdown_memcg_caches(struct kmem_cache *s)
{
return 0;
}
static inline void flush_memcg_workqueue(struct kmem_cache *s)
{
}
#endif /* CONFIG_MEMCG && !CONFIG_SLOB */
void slab_kmem_cache_release(struct kmem_cache *s)
@ -845,6 +874,8 @@ void kmem_cache_destroy(struct kmem_cache *s)
if (unlikely(!s))
return;
flush_memcg_workqueue(s);
get_online_cpus();
get_online_mems();
@ -1212,9 +1243,9 @@ void cache_random_seq_destroy(struct kmem_cache *cachep)
#if defined(CONFIG_SLAB) || defined(CONFIG_SLUB_DEBUG)
#ifdef CONFIG_SLAB
#define SLABINFO_RIGHTS (S_IWUSR | S_IRUSR)
#define SLABINFO_RIGHTS (0600)
#else
#define SLABINFO_RIGHTS S_IRUSR
#define SLABINFO_RIGHTS (0400)
#endif
static void print_slabinfo_header(struct seq_file *m)

2
mm/swapfile.c
View File

@ -100,7 +100,7 @@ atomic_t nr_rotate_swap = ATOMIC_INIT(0);
static inline unsigned char swap_count(unsigned char ent)
{
return ent & ~SWAP_HAS_CACHE; /* may include SWAP_HAS_CONT flag */
return ent & ~SWAP_HAS_CACHE; /* may include COUNT_CONTINUED flag */
}
/* returns 1 if swap entry is freed */

4
mm/vmalloc.c
View File

@ -2741,11 +2741,11 @@ static const struct seq_operations vmalloc_op = {
static int __init proc_vmalloc_init(void)
{
if (IS_ENABLED(CONFIG_NUMA))
proc_create_seq_private("vmallocinfo", S_IRUSR, NULL,
proc_create_seq_private("vmallocinfo", 0400, NULL,
&vmalloc_op,
nr_node_ids * sizeof(unsigned int), NULL);
else
proc_create_seq("vmallocinfo", S_IRUSR, NULL, &vmalloc_op);
proc_create_seq("vmallocinfo", 0400, NULL, &vmalloc_op);
return 0;
}
module_init(proc_vmalloc_init);

5
mm/zsmalloc.c
View File

@ -661,8 +661,9 @@ static void zs_pool_stat_create(struct zs_pool *pool, const char *name)
}
pool->stat_dentry = entry;
entry = debugfs_create_file("classes", S_IFREG | S_IRUGO,
pool->stat_dentry, pool, &zs_stats_size_fops);
entry = debugfs_create_file("classes", S_IFREG | 0444,
pool->stat_dentry, pool,
&zs_stats_size_fops);
if (!entry) {
pr_warn("%s: debugfs file entry <%s> creation failed\n",
name, "classes");

38
mm/zswap.c
View File

@ -1256,26 +1256,26 @@ static int __init zswap_debugfs_init(void)
if (!zswap_debugfs_root)
return -ENOMEM;
debugfs_create_u64("pool_limit_hit", S_IRUGO,
zswap_debugfs_root, &zswap_pool_limit_hit);
debugfs_create_u64("reject_reclaim_fail", S_IRUGO,
zswap_debugfs_root, &zswap_reject_reclaim_fail);
debugfs_create_u64("reject_alloc_fail", S_IRUGO,
zswap_debugfs_root, &zswap_reject_alloc_fail);
debugfs_create_u64("reject_kmemcache_fail", S_IRUGO,
zswap_debugfs_root, &zswap_reject_kmemcache_fail);
debugfs_create_u64("reject_compress_poor", S_IRUGO,
zswap_debugfs_root, &zswap_reject_compress_poor);
debugfs_create_u64("written_back_pages", S_IRUGO,
zswap_debugfs_root, &zswap_written_back_pages);
debugfs_create_u64("duplicate_entry", S_IRUGO,
zswap_debugfs_root, &zswap_duplicate_entry);
debugfs_create_u64("pool_total_size", S_IRUGO,
zswap_debugfs_root, &zswap_pool_total_size);
debugfs_create_atomic_t("stored_pages", S_IRUGO,
zswap_debugfs_root, &zswap_stored_pages);
debugfs_create_u64("pool_limit_hit", 0444,
zswap_debugfs_root, &zswap_pool_limit_hit);
debugfs_create_u64("reject_reclaim_fail", 0444,
zswap_debugfs_root, &zswap_reject_reclaim_fail);
debugfs_create_u64("reject_alloc_fail", 0444,
zswap_debugfs_root, &zswap_reject_alloc_fail);
debugfs_create_u64("reject_kmemcache_fail", 0444,
zswap_debugfs_root, &zswap_reject_kmemcache_fail);
debugfs_create_u64("reject_compress_poor", 0444,
zswap_debugfs_root, &zswap_reject_compress_poor);
debugfs_create_u64("written_back_pages", 0444,
zswap_debugfs_root, &zswap_written_back_pages);
debugfs_create_u64("duplicate_entry", 0444,
zswap_debugfs_root, &zswap_duplicate_entry);
debugfs_create_u64("pool_total_size", 0444,
zswap_debugfs_root, &zswap_pool_total_size);
debugfs_create_atomic_t("stored_pages", 0444,
zswap_debugfs_root, &zswap_stored_pages);
debugfs_create_atomic_t("same_filled_pages", 0444,
zswap_debugfs_root, &zswap_same_filled_pages);
zswap_debugfs_root, &zswap_same_filled_pages);
return 0;
}