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Merge branches 'akpm' and 'akpm-hotfixes' (patches from Andrew) 

Merge yet more updates and hotfixes from Andrew Morton:
 "Post-linux-next material, based upon latest upstream to catch the
  now-merged dependencies:

   - 10 patches.

     Subsystems affected by this patch series: mm (vmstat and migration)
     and compat.

  And bunch of hotfixes, mostly cc:stable:

   - 8 patches.

     Subsystems affected by this patch series: mm (hmm, hugetlb, vmscan,
     pagealloc, pagemap, kmemleak, mempolicy, and memblock)"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  arch: remove compat_alloc_user_space
  compat: remove some compat entry points
  mm: simplify compat numa syscalls
  mm: simplify compat_sys_move_pages
  kexec: avoid compat_alloc_user_space
  kexec: move locking into do_kexec_load
  mm: migrate: change to use bool type for 'page_was_mapped'
  mm: migrate: fix the incorrect function name in comments
  mm: migrate: introduce a local variable to get the number of pages
  mm/vmstat: protect per cpu variables with preempt disable on RT

* emailed hotfixes from Andrew Morton <akpm@linux-foundation.org>:
  nds32/setup: remove unused memblock_region variable in setup_memory()
  mm/mempolicy: fix a race between offset_il_node and mpol_rebind_task
  mm/kmemleak: allow __GFP_NOLOCKDEP passed to kmemleak's gfp
  mmap_lock: change trace and locking order
  mm/page_alloc.c: avoid accessing uninitialized pcp page migratetype
  mm,vmscan: fix divide by zero in get_scan_count
  mm/hugetlb: initialize hugetlb_usage in mm_init
  mm/hmm: bypass devmap pte when all pfn requested flags are fulfilled
This commit is contained in:
Linus Torvalds 2021-09-08 18:52:05 -07:00
parent 730bf31b8f a7a08b275a ddb13122aa
commit a3fa7a101d
47 changed files with 267 additions and 663 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/arm64/include/asm/compat.h
View File

@ -107,11 +107,6 @@ struct compat_statfs {
#define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current)))
#define COMPAT_MINSIGSTKSZ 2048
static inline void __user *arch_compat_alloc_user_space(long len)
{
return (void __user *)compat_user_stack_pointer() - len;
}
struct compat_ipc64_perm {
compat_key_t key;
__compat_uid32_t uid;

11
arch/arm64/include/asm/uaccess.h
View File

@ -430,17 +430,6 @@ extern unsigned long __must_check __arch_copy_to_user(void __user *to, const voi
__actu_ret; \
})
extern unsigned long __must_check __arch_copy_in_user(void __user *to, const void __user *from, unsigned long n);
#define raw_copy_in_user(to, from, n) \
({ \
unsigned long __aciu_ret; \
uaccess_ttbr0_enable(); \
__aciu_ret = __arch_copy_in_user(__uaccess_mask_ptr(to), \
__uaccess_mask_ptr(from), (n)); \
uaccess_ttbr0_disable(); \
__aciu_ret; \
})
#define INLINE_COPY_TO_USER
#define INLINE_COPY_FROM_USER

10
arch/arm64/include/asm/unistd32.h
View File

@ -649,11 +649,11 @@ __SYSCALL(__NR_inotify_add_watch, sys_inotify_add_watch)
#define __NR_inotify_rm_watch 318
__SYSCALL(__NR_inotify_rm_watch, sys_inotify_rm_watch)
#define __NR_mbind 319
__SYSCALL(__NR_mbind, compat_sys_mbind)
__SYSCALL(__NR_mbind, sys_mbind)
#define __NR_get_mempolicy 320
__SYSCALL(__NR_get_mempolicy, compat_sys_get_mempolicy)
__SYSCALL(__NR_get_mempolicy, sys_get_mempolicy)
#define __NR_set_mempolicy 321
__SYSCALL(__NR_set_mempolicy, compat_sys_set_mempolicy)
__SYSCALL(__NR_set_mempolicy, sys_set_mempolicy)
#define __NR_openat 322
__SYSCALL(__NR_openat, compat_sys_openat)
#define __NR_mkdirat 323
@ -699,7 +699,7 @@ __SYSCALL(__NR_tee, sys_tee)
#define __NR_vmsplice 343
__SYSCALL(__NR_vmsplice, sys_vmsplice)
#define __NR_move_pages 344
__SYSCALL(__NR_move_pages, compat_sys_move_pages)
__SYSCALL(__NR_move_pages, sys_move_pages)
#define __NR_getcpu 345
__SYSCALL(__NR_getcpu, sys_getcpu)
#define __NR_epoll_pwait 346
@ -811,7 +811,7 @@ __SYSCALL(__NR_rseq, sys_rseq)
#define __NR_io_pgetevents 399
__SYSCALL(__NR_io_pgetevents, compat_sys_io_pgetevents)
#define __NR_migrate_pages 400
__SYSCALL(__NR_migrate_pages, compat_sys_migrate_pages)
__SYSCALL(__NR_migrate_pages, sys_migrate_pages)
#define __NR_kexec_file_load 401
__SYSCALL(__NR_kexec_file_load, sys_kexec_file_load)
/* 402 is unused */

2
arch/arm64/lib/Makefile
View File

@ -1,6 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
lib-y := clear_user.o delay.o copy_from_user.o \
copy_to_user.o copy_in_user.o copy_page.o \
copy_to_user.o copy_page.o \
clear_page.o csum.o insn.o memchr.o memcpy.o \
memset.o memcmp.o strcmp.o strncmp.o strlen.o \
strnlen.o strchr.o strrchr.o tishift.o

77
arch/arm64/lib/copy_in_user.S
View File

@ -1,77 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copy from user space to user space
*
* Copyright (C) 2012 ARM Ltd.
*/
#include <linux/linkage.h>
#include <asm/asm-uaccess.h>
#include <asm/assembler.h>
#include <asm/cache.h>
/*
* Copy from user space to user space (alignment handled by the hardware)
*
* Parameters:
* x0 - to
* x1 - from
* x2 - n
* Returns:
* x0 - bytes not copied
*/
.macro ldrb1 reg, ptr, val
user_ldst 9998f, ldtrb, \reg, \ptr, \val
.endm
.macro strb1 reg, ptr, val
user_ldst 9998f, sttrb, \reg, \ptr, \val
.endm
.macro ldrh1 reg, ptr, val
user_ldst 9997f, ldtrh, \reg, \ptr, \val
.endm
.macro strh1 reg, ptr, val
user_ldst 9997f, sttrh, \reg, \ptr, \val
.endm
.macro ldr1 reg, ptr, val
user_ldst 9997f, ldtr, \reg, \ptr, \val
.endm
.macro str1 reg, ptr, val
user_ldst 9997f, sttr, \reg, \ptr, \val
.endm
.macro ldp1 reg1, reg2, ptr, val
user_ldp 9997f, \reg1, \reg2, \ptr, \val
.endm
.macro stp1 reg1, reg2, ptr, val
user_stp 9997f, \reg1, \reg2, \ptr, \val
.endm
end .req x5
srcin .req x15
SYM_FUNC_START(__arch_copy_in_user)
add end, x0, x2
mov srcin, x1
#include "copy_template.S"
mov x0, #0
ret
SYM_FUNC_END(__arch_copy_in_user)
EXPORT_SYMBOL(__arch_copy_in_user)
.section .fixup,"ax"
.align 2
9997: cmp dst, dstin
b.ne 9998f
// Before being absolutely sure we couldn't copy anything, try harder
USER(9998f, ldtrb tmp1w, [srcin])
USER(9998f, sttrb tmp1w, [dst])
add dst, dst, #1
9998: sub x0, end, dst // bytes not copied
ret
.previous

2
arch/mips/cavium-octeon/octeon-memcpy.S
View File

@ -154,8 +154,6 @@ FEXPORT(__raw_copy_from_user)
EXPORT_SYMBOL(__raw_copy_from_user)
FEXPORT(__raw_copy_to_user)
EXPORT_SYMBOL(__raw_copy_to_user)
FEXPORT(__raw_copy_in_user)
EXPORT_SYMBOL(__raw_copy_in_user)
/*
* Note: dst & src may be unaligned, len may be 0
* Temps

8
arch/mips/include/asm/compat.h
View File

@ -96,14 +96,6 @@ struct compat_statfs {
#define COMPAT_OFF_T_MAX 0x7fffffff
static inline void __user *arch_compat_alloc_user_space(long len)
{
struct pt_regs *regs = (struct pt_regs *)
((unsigned long) current_thread_info() + THREAD_SIZE - 32) - 1;
return (void __user *) (regs->regs[29] - len);
}
struct compat_ipc64_perm {
compat_key_t key;
__compat_uid32_t uid;

26
arch/mips/include/asm/uaccess.h
View File

@ -428,7 +428,6 @@ do { \
extern size_t __raw_copy_from_user(void *__to, const void *__from, size_t __n);
extern size_t __raw_copy_to_user(void *__to, const void *__from, size_t __n);
extern size_t __raw_copy_in_user(void *__to, const void *__from, size_t __n);
static inline unsigned long
raw_copy_from_user(void *to, const void __user *from, unsigned long n)
@ -480,31 +479,6 @@ raw_copy_to_user(void __user *to, const void *from, unsigned long n)
#define INLINE_COPY_FROM_USER
#define INLINE_COPY_TO_USER
static inline unsigned long
raw_copy_in_user(void __user *to, const void __user *from, unsigned long n)
{
register void __user *__cu_to_r __asm__("$4");
register const void __user *__cu_from_r __asm__("$5");
register long __cu_len_r __asm__("$6");
__cu_to_r = to;
__cu_from_r = from;
__cu_len_r = n;
__asm__ __volatile__(
".set\tnoreorder\n\t"
__MODULE_JAL(__raw_copy_in_user)
".set\tnoat\n\t"
__UA_ADDU "\t$1, %1, %2\n\t"
".set\tat\n\t"
".set\treorder"
: "+r" (__cu_to_r), "+r" (__cu_from_r), "+r" (__cu_len_r)
:
: "$8", "$9", "$10", "$11", "$12", "$14", "$15", "$24", "$31",
DADDI_SCRATCH, "memory");
return __cu_len_r;
}
extern __kernel_size_t __bzero(void __user *addr, __kernel_size_t size);
/*

10
arch/mips/kernel/syscalls/syscall_n32.tbl
View File

@ -239,9 +239,9 @@
228 n32 clock_nanosleep sys_clock_nanosleep_time32
229 n32 tgkill sys_tgkill
230 n32 utimes sys_utimes_time32
231 n32 mbind compat_sys_mbind
232 n32 get_mempolicy compat_sys_get_mempolicy
233 n32 set_mempolicy compat_sys_set_mempolicy
231 n32 mbind sys_mbind
232 n32 get_mempolicy sys_get_mempolicy
233 n32 set_mempolicy sys_set_mempolicy
234 n32 mq_open compat_sys_mq_open
235 n32 mq_unlink sys_mq_unlink
236 n32 mq_timedsend sys_mq_timedsend_time32
@ -258,7 +258,7 @@
247 n32 inotify_init sys_inotify_init
248 n32 inotify_add_watch sys_inotify_add_watch
249 n32 inotify_rm_watch sys_inotify_rm_watch
250 n32 migrate_pages compat_sys_migrate_pages
250 n32 migrate_pages sys_migrate_pages
251 n32 openat sys_openat
252 n32 mkdirat sys_mkdirat
253 n32 mknodat sys_mknodat
@ -279,7 +279,7 @@
268 n32 sync_file_range sys_sync_file_range
269 n32 tee sys_tee
270 n32 vmsplice sys_vmsplice
271 n32 move_pages compat_sys_move_pages
271 n32 move_pages sys_move_pages
272 n32 set_robust_list compat_sys_set_robust_list
273 n32 get_robust_list compat_sys_get_robust_list
274 n32 kexec_load compat_sys_kexec_load

10
arch/mips/kernel/syscalls/syscall_o32.tbl
View File

@ -279,9 +279,9 @@
265 o32 clock_nanosleep sys_clock_nanosleep_time32
266 o32 tgkill sys_tgkill
267 o32 utimes sys_utimes_time32
268 o32 mbind sys_mbind compat_sys_mbind
269 o32 get_mempolicy sys_get_mempolicy compat_sys_get_mempolicy
270 o32 set_mempolicy sys_set_mempolicy compat_sys_set_mempolicy
268 o32 mbind sys_mbind
269 o32 get_mempolicy sys_get_mempolicy
270 o32 set_mempolicy sys_set_mempolicy
271 o32 mq_open sys_mq_open compat_sys_mq_open
272 o32 mq_unlink sys_mq_unlink
273 o32 mq_timedsend sys_mq_timedsend_time32
@ -298,7 +298,7 @@
284 o32 inotify_init sys_inotify_init
285 o32 inotify_add_watch sys_inotify_add_watch
286 o32 inotify_rm_watch sys_inotify_rm_watch
287 o32 migrate_pages sys_migrate_pages compat_sys_migrate_pages
287 o32 migrate_pages sys_migrate_pages
288 o32 openat sys_openat compat_sys_openat
289 o32 mkdirat sys_mkdirat
290 o32 mknodat sys_mknodat
@ -319,7 +319,7 @@
305 o32 sync_file_range sys_sync_file_range sys32_sync_file_range
306 o32 tee sys_tee
307 o32 vmsplice sys_vmsplice
308 o32 move_pages sys_move_pages compat_sys_move_pages
308 o32 move_pages sys_move_pages
309 o32 set_robust_list sys_set_robust_list compat_sys_set_robust_list
310 o32 get_robust_list sys_get_robust_list compat_sys_get_robust_list
311 o32 kexec_load sys_kexec_load compat_sys_kexec_load

11
arch/mips/lib/memcpy.S
View File

@ -666,8 +666,6 @@ FEXPORT(__raw_copy_from_user)
EXPORT_SYMBOL(__raw_copy_from_user)
FEXPORT(__raw_copy_to_user)
EXPORT_SYMBOL(__raw_copy_to_user)
FEXPORT(__raw_copy_in_user)
EXPORT_SYMBOL(__raw_copy_in_user)
#endif
/* Legacy Mode, user <-> user */
__BUILD_COPY_USER LEGACY_MODE USEROP USEROP
@ -703,13 +701,4 @@ EXPORT_SYMBOL(__raw_copy_to_user)
__BUILD_COPY_USER EVA_MODE KERNELOP USEROP
END(__raw_copy_to_user)
/*
* __copy_in_user (EVA)
*/
LEAF(__raw_copy_in_user)
EXPORT_SYMBOL(__raw_copy_in_user)
__BUILD_COPY_USER EVA_MODE USEROP USEROP
END(__raw_copy_in_user)
#endif

1
arch/nds32/kernel/setup.c
View File

@ -244,7 +244,6 @@ static void __init setup_memory(void)
unsigned long ram_start_pfn;
unsigned long free_ram_start_pfn;
phys_addr_t memory_start, memory_end;
struct memblock_region *region;
memory_end = memory_start = 0;

6
arch/parisc/include/asm/compat.h
View File

@ -163,12 +163,6 @@ struct compat_shmid64_ds {
#define COMPAT_ELF_NGREG 80
typedef compat_ulong_t compat_elf_gregset_t[COMPAT_ELF_NGREG];
static __inline__ void __user *arch_compat_alloc_user_space(long len)
{
struct pt_regs *regs = &current->thread.regs;
return (void __user *)regs->gr[30];
}
static inline int __is_compat_task(struct task_struct *t)
{
return test_tsk_thread_flag(t, TIF_32BIT);

2
arch/parisc/include/asm/uaccess.h
View File

@ -215,8 +215,6 @@ unsigned long __must_check raw_copy_to_user(void __user *dst, const void *src,
unsigned long len);
unsigned long __must_check raw_copy_from_user(void *dst, const void __user *src,
unsigned long len);
unsigned long __must_check raw_copy_in_user(void __user *dst, const void __user *src,
unsigned long len);
#define INLINE_COPY_TO_USER
#define INLINE_COPY_FROM_USER

8
arch/parisc/kernel/syscalls/syscall.tbl
View File

@ -292,9 +292,9 @@
258 32 clock_nanosleep sys_clock_nanosleep_time32
258 64 clock_nanosleep sys_clock_nanosleep
259 common tgkill sys_tgkill
260 common mbind sys_mbind compat_sys_mbind
261 common get_mempolicy sys_get_mempolicy compat_sys_get_mempolicy
262 common set_mempolicy sys_set_mempolicy compat_sys_set_mempolicy
260 common mbind sys_mbind
261 common get_mempolicy sys_get_mempolicy
262 common set_mempolicy sys_set_mempolicy
# 263 was vserver
264 common add_key sys_add_key
265 common request_key sys_request_key
@ -331,7 +331,7 @@
292 64 sync_file_range sys_sync_file_range
293 common tee sys_tee
294 common vmsplice sys_vmsplice
295 common move_pages sys_move_pages compat_sys_move_pages
295 common move_pages sys_move_pages
296 common getcpu sys_getcpu
297 common epoll_pwait sys_epoll_pwait compat_sys_epoll_pwait
298 common statfs64 sys_statfs64 compat_sys_statfs64

9
arch/parisc/lib/memcpy.c
View File

@ -38,14 +38,6 @@ unsigned long raw_copy_from_user(void *dst, const void __user *src,
}
EXPORT_SYMBOL(raw_copy_from_user);
unsigned long raw_copy_in_user(void __user *dst, const void __user *src, unsigned long len)
{
mtsp(get_user_space(), 1);
mtsp(get_user_space(), 2);
return pa_memcpy((void __force *)dst, (void __force *)src, len);
}
void * memcpy(void * dst,const void *src, size_t count)
{
mtsp(get_kernel_space(), 1);
@ -54,7 +46,6 @@ void * memcpy(void * dst,const void *src, size_t count)
return dst;
}
EXPORT_SYMBOL(raw_copy_in_user);
EXPORT_SYMBOL(memcpy);
bool copy_from_kernel_nofault_allowed(const void *unsafe_src, size_t size)

16
arch/powerpc/include/asm/compat.h
View File

@ -83,22 +83,6 @@ struct compat_statfs {
#define COMPAT_OFF_T_MAX 0x7fffffff
static inline void __user *arch_compat_alloc_user_space(long len)
{
struct pt_regs *regs = current->thread.regs;
unsigned long usp = regs->gpr[1];
/*
* We can't access below the stack pointer in the 32bit ABI and
* can access 288 bytes in the 64bit big-endian ABI,
* or 512 bytes with the new ELFv2 little-endian ABI.
*/
if (!is_32bit_task())
usp -= USER_REDZONE_SIZE;
return (void __user *) (usp - len);
}
/*
* ipc64_perm is actually 32/64bit clean but since the compat layer refers to
* it we may as well define it.

10
arch/powerpc/kernel/syscalls/syscall.tbl
View File

@ -330,10 +330,10 @@
256 64 sys_debug_setcontext sys_ni_syscall
256 spu sys_debug_setcontext sys_ni_syscall
# 257 reserved for vserver
258 nospu migrate_pages sys_migrate_pages compat_sys_migrate_pages
259 nospu mbind sys_mbind compat_sys_mbind
260 nospu get_mempolicy sys_get_mempolicy compat_sys_get_mempolicy
261 nospu set_mempolicy sys_set_mempolicy compat_sys_set_mempolicy
258 nospu migrate_pages sys_migrate_pages
259 nospu mbind sys_mbind
260 nospu get_mempolicy sys_get_mempolicy
261 nospu set_mempolicy sys_set_mempolicy
262 nospu mq_open sys_mq_open compat_sys_mq_open
263 nospu mq_unlink sys_mq_unlink
264 32 mq_timedsend sys_mq_timedsend_time32
@ -381,7 +381,7 @@
298 common faccessat sys_faccessat
299 common get_robust_list sys_get_robust_list compat_sys_get_robust_list
300 common set_robust_list sys_set_robust_list compat_sys_set_robust_list
301 common move_pages sys_move_pages compat_sys_move_pages
301 common move_pages sys_move_pages
302 common getcpu sys_getcpu
303 nospu epoll_pwait sys_epoll_pwait compat_sys_epoll_pwait
304 32 utimensat sys_utimensat_time32

10
arch/s390/include/asm/compat.h
View File

@ -176,16 +176,6 @@ static inline int is_compat_task(void)
return test_thread_flag(TIF_31BIT);
}
static inline void __user *arch_compat_alloc_user_space(long len)
{
unsigned long stack;
stack = KSTK_ESP(current);
if (is_compat_task())
stack &= 0x7fffffffUL;
return (void __user *) (stack - len);
}
#endif
struct compat_ipc64_perm {

3
arch/s390/include/asm/uaccess.h
View File

@ -227,9 +227,6 @@ static inline int __get_user_fn(void *x, const void __user *ptr, unsigned long s
__get_user(x, ptr); \
})
unsigned long __must_check
raw_copy_in_user(void __user *to, const void __user *from, unsigned long n);
/*
* Copy a null terminated string from userspace.
*/

10
arch/s390/kernel/syscalls/syscall.tbl
View File

@ -274,9 +274,9 @@
265 common statfs64 sys_statfs64 compat_sys_statfs64
266 common fstatfs64 sys_fstatfs64 compat_sys_fstatfs64
267 common remap_file_pages sys_remap_file_pages sys_remap_file_pages
268 common mbind sys_mbind compat_sys_mbind
269 common get_mempolicy sys_get_mempolicy compat_sys_get_mempolicy
270 common set_mempolicy sys_set_mempolicy compat_sys_set_mempolicy
268 common mbind sys_mbind sys_mbind
269 common get_mempolicy sys_get_mempolicy sys_get_mempolicy
270 common set_mempolicy sys_set_mempolicy sys_set_mempolicy
271 common mq_open sys_mq_open compat_sys_mq_open
272 common mq_unlink sys_mq_unlink sys_mq_unlink
273 common mq_timedsend sys_mq_timedsend sys_mq_timedsend_time32
@ -293,7 +293,7 @@
284 common inotify_init sys_inotify_init sys_inotify_init
285 common inotify_add_watch sys_inotify_add_watch sys_inotify_add_watch
286 common inotify_rm_watch sys_inotify_rm_watch sys_inotify_rm_watch
287 common migrate_pages sys_migrate_pages compat_sys_migrate_pages
287 common migrate_pages sys_migrate_pages sys_migrate_pages
288 common openat sys_openat compat_sys_openat
289 common mkdirat sys_mkdirat sys_mkdirat
290 common mknodat sys_mknodat sys_mknodat
@ -317,7 +317,7 @@
307 common sync_file_range sys_sync_file_range compat_sys_s390_sync_file_range
308 common tee sys_tee sys_tee
309 common vmsplice sys_vmsplice sys_vmsplice
310 common move_pages sys_move_pages compat_sys_move_pages
310 common move_pages sys_move_pages sys_move_pages
311 common getcpu sys_getcpu sys_getcpu
312 common epoll_pwait sys_epoll_pwait compat_sys_epoll_pwait
313 common utimes sys_utimes sys_utimes_time32

63
arch/s390/lib/uaccess.c
View File

@ -204,69 +204,6 @@ unsigned long raw_copy_to_user(void __user *to, const void *from, unsigned long
}
EXPORT_SYMBOL(raw_copy_to_user);
static inline unsigned long copy_in_user_mvcos(void __user *to, const void __user *from,
unsigned long size)
{
unsigned long tmp1, tmp2;
tmp1 = -4096UL;
/* FIXME: copy with reduced length. */
asm volatile(
" lgr 0,%[spec]\n"
"0: .insn ss,0xc80000000000,0(%0,%1),0(%2),0\n"
" jz 2f\n"
"1: algr %0,%3\n"
" slgr %1,%3\n"
" slgr %2,%3\n"
" j 0b\n"
"2:slgr %0,%0\n"
"3: \n"
EX_TABLE(0b,3b)
: "+a" (size), "+a" (to), "+a" (from), "+a" (tmp1), "=a" (tmp2)
: [spec] "d" (0x810081UL)
: "cc", "memory", "0");
return size;
}
static inline unsigned long copy_in_user_mvc(void __user *to, const void __user *from,
unsigned long size)
{
unsigned long tmp1;
asm volatile(
" sacf 256\n"
" aghi %0,-1\n"
" jo 5f\n"
" bras %3,3f\n"
"0: aghi %0,257\n"
"1: mvc 0(1,%1),0(%2)\n"
" la %1,1(%1)\n"
" la %2,1(%2)\n"
" aghi %0,-1\n"
" jnz 1b\n"
" j 5f\n"
"2: mvc 0(256,%1),0(%2)\n"
" la %1,256(%1)\n"
" la %2,256(%2)\n"
"3: aghi %0,-256\n"
" jnm 2b\n"
"4: ex %0,1b-0b(%3)\n"
"5: slgr %0,%0\n"
"6: sacf 768\n"
EX_TABLE(1b,6b) EX_TABLE(2b,0b) EX_TABLE(4b,0b)
: "+a" (size), "+a" (to), "+a" (from), "=a" (tmp1)
: : "cc", "memory");
return size;
}
unsigned long raw_copy_in_user(void __user *to, const void __user *from, unsigned long n)
{
if (copy_with_mvcos())
return copy_in_user_mvcos(to, from, n);
return copy_in_user_mvc(to, from, n);
}
EXPORT_SYMBOL(raw_copy_in_user);
static inline unsigned long clear_user_mvcos(void __user *to, unsigned long size)
{
unsigned long tmp1, tmp2;

19
arch/sparc/include/asm/compat.h
View File

@ -116,25 +116,6 @@ struct compat_statfs {
#define COMPAT_OFF_T_MAX 0x7fffffff
#ifdef CONFIG_COMPAT
static inline void __user *arch_compat_alloc_user_space(long len)
{
struct pt_regs *regs = current_thread_info()->kregs;
unsigned long usp = regs->u_regs[UREG_I6];
if (test_thread_64bit_stack(usp))
usp += STACK_BIAS;
if (test_thread_flag(TIF_32BIT))
usp &= 0xffffffffUL;
usp -= len;
usp &= ~0x7UL;
return (void __user *) usp;
}
#endif
struct compat_ipc64_perm {
compat_key_t key;
__compat_uid32_t uid;

2
arch/sparc/kernel/process_64.c
View File

@ -455,7 +455,7 @@ static unsigned long clone_stackframe(unsigned long csp, unsigned long psp)
distance = fp - psp;
rval = (csp - distance);
if (copy_in_user((void __user *) rval, (void __user *) psp, distance))
if (raw_copy_in_user((void __user *)rval, (void __user *)psp, distance))
rval = 0;
else if (!stack_64bit) {
if (put_user(((u32)csp),

12
arch/sparc/kernel/signal32.c
View File

@ -435,9 +435,9 @@ static int setup_frame32(struct ksignal *ksig, struct pt_regs *regs,
(_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int));
if (!wsaved) {
err |= copy_in_user((u32 __user *)sf,
(u32 __user *)(regs->u_regs[UREG_FP]),
sizeof(struct reg_window32));
err |= raw_copy_in_user((u32 __user *)sf,
(u32 __user *)(regs->u_regs[UREG_FP]),
sizeof(struct reg_window32));
} else {
struct reg_window *rp;
@ -567,9 +567,9 @@ static int setup_rt_frame32(struct ksignal *ksig, struct pt_regs *regs,
err |= put_compat_sigset(&sf->mask, oldset, sizeof(compat_sigset_t));
if (!wsaved) {
err |= copy_in_user((u32 __user *)sf,
(u32 __user *)(regs->u_regs[UREG_FP]),
sizeof(struct reg_window32));
err |= raw_copy_in_user((u32 __user *)sf,
(u32 __user *)(regs->u_regs[UREG_FP]),
sizeof(struct reg_window32));
} else {
struct reg_window *rp;

8
arch/sparc/kernel/signal_64.c
View File

@ -406,10 +406,10 @@ setup_rt_frame(struct ksignal *ksig, struct pt_regs *regs)
err |= copy_to_user(&sf->mask, sigmask_to_save(), sizeof(sigset_t));
if (!wsaved) {
err |= copy_in_user((u64 __user *)sf,
(u64 __user *)(regs->u_regs[UREG_FP] +
STACK_BIAS),
sizeof(struct reg_window));
err |= raw_copy_in_user((u64 __user *)sf,
(u64 __user *)(regs->u_regs[UREG_FP] +
STACK_BIAS),
sizeof(struct reg_window));
} else {
struct reg_window *rp;

10
arch/sparc/kernel/syscalls/syscall.tbl
View File

@ -365,12 +365,12 @@
299 common unshare sys_unshare
300 common set_robust_list sys_set_robust_list compat_sys_set_robust_list
301 common get_robust_list sys_get_robust_list compat_sys_get_robust_list
302 common migrate_pages sys_migrate_pages compat_sys_migrate_pages
303 common mbind sys_mbind compat_sys_mbind
304 common get_mempolicy sys_get_mempolicy compat_sys_get_mempolicy
305 common set_mempolicy sys_set_mempolicy compat_sys_set_mempolicy
302 common migrate_pages sys_migrate_pages
303 common mbind sys_mbind
304 common get_mempolicy sys_get_mempolicy
305 common set_mempolicy sys_set_mempolicy
306 common kexec_load sys_kexec_load compat_sys_kexec_load
307 common move_pages sys_move_pages compat_sys_move_pages
307 common move_pages sys_move_pages
308 common getcpu sys_getcpu
309 common epoll_pwait sys_epoll_pwait compat_sys_epoll_pwait
310 32 utimensat sys_utimensat_time32

4
arch/x86/entry/syscalls/syscall_32.tbl
View File

@ -286,7 +286,7 @@
272 i386 fadvise64_64 sys_ia32_fadvise64_64
273 i386 vserver
274 i386 mbind sys_mbind
275 i386 get_mempolicy sys_get_mempolicy compat_sys_get_mempolicy
275 i386 get_mempolicy sys_get_mempolicy
276 i386 set_mempolicy sys_set_mempolicy
277 i386 mq_open sys_mq_open compat_sys_mq_open
278 i386 mq_unlink sys_mq_unlink
@ -328,7 +328,7 @@
314 i386 sync_file_range sys_ia32_sync_file_range
315 i386 tee sys_tee
316 i386 vmsplice sys_vmsplice
317 i386 move_pages sys_move_pages compat_sys_move_pages
317 i386 move_pages sys_move_pages
318 i386 getcpu sys_getcpu
319 i386 epoll_pwait sys_epoll_pwait
320 i386 utimensat sys_utimensat_time32

2
arch/x86/entry/syscalls/syscall_64.tbl
View File

@ -398,7 +398,7 @@
530 x32 set_robust_list compat_sys_set_robust_list
531 x32 get_robust_list compat_sys_get_robust_list
532 x32 vmsplice sys_vmsplice
533 x32 move_pages compat_sys_move_pages
533 x32 move_pages sys_move_pages
534 x32 preadv compat_sys_preadv64
535 x32 pwritev compat_sys_pwritev64
536 x32 rt_tgsigqueueinfo compat_sys_rt_tgsigqueueinfo

13
arch/x86/include/asm/compat.h
View File

@ -156,19 +156,6 @@ struct compat_shmid64_ds {
(!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT))
#endif
static inline void __user *arch_compat_alloc_user_space(long len)
{
compat_uptr_t sp = task_pt_regs(current)->sp;
/*
* -128 for the x32 ABI redzone. For IA32, it is not strictly
* necessary, but not harmful.
*/
sp -= 128;
return (void __user *)round_down(sp - len, 16);
}
static inline bool in_x32_syscall(void)
{
#ifdef CONFIG_X86_X32_ABI

7
arch/x86/include/asm/uaccess_64.h
View File

@ -58,13 +58,6 @@ raw_copy_to_user(void __user *dst, const void *src, unsigned long size)
return copy_user_generic((__force void *)dst, src, size);
}
static __always_inline __must_check
unsigned long raw_copy_in_user(void __user *dst, const void __user *src, unsigned long size)
{
return copy_user_generic((__force void *)dst,
(__force void *)src, size);
}
extern long __copy_user_nocache(void *dst, const void __user *src,
unsigned size, int zerorest);

39
include/linux/compat.h
View File

@ -395,14 +395,6 @@ struct compat_kexec_segment;
struct compat_mq_attr;
struct compat_msgbuf;
#define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
#define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
unsigned long bitmap_size);
long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
unsigned long bitmap_size);
void copy_siginfo_to_external32(struct compat_siginfo *to,
const struct kernel_siginfo *from);
int copy_siginfo_from_user32(kernel_siginfo_t *to,
@ -519,8 +511,6 @@ extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
struct epoll_event; /* fortunately, this one is fixed-layout */
extern void __user *compat_alloc_user_space(unsigned long len);
int compat_restore_altstack(const compat_stack_t __user *uss);
int __compat_save_altstack(compat_stack_t __user *, unsigned long);
#define unsafe_compat_save_altstack(uss, sp, label) do { \
@ -807,26 +797,6 @@ asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr
/* mm/fadvise.c: No generic prototype for fadvise64_64 */
/* mm/, CONFIG_MMU only */
asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
compat_ulong_t mode,
compat_ulong_t __user *nmask,
compat_ulong_t maxnode, compat_ulong_t flags);
asmlinkage long compat_sys_get_mempolicy(int __user *policy,
compat_ulong_t __user *nmask,
compat_ulong_t maxnode,
compat_ulong_t addr,
compat_ulong_t flags);
asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
compat_ulong_t maxnode);
asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
const compat_ulong_t __user *new_nodes);
asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
__u32 __user *pages,
const int __user *nodes,
int __user *status,
int flags);
asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
compat_pid_t pid, int sig,
struct compat_siginfo __user *uinfo);
@ -976,6 +946,15 @@ static inline bool in_compat_syscall(void) { return false; }
#endif /* CONFIG_COMPAT */
#define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
#define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
unsigned long bitmap_size);
long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
unsigned long bitmap_size);
/*
* Some legacy ABIs like the i386 one use less than natural alignment for 64-bit
* types, and will need special compat treatment for that. Most architectures

9
include/linux/hugetlb.h
View File

@ -858,6 +858,11 @@ static inline spinlock_t *huge_pte_lockptr(struct hstate *h,
void hugetlb_report_usage(struct seq_file *m, struct mm_struct *mm);
static inline void hugetlb_count_init(struct mm_struct *mm)
{
atomic_long_set(&mm->hugetlb_usage, 0);
}
static inline void hugetlb_count_add(long l, struct mm_struct *mm)
{
atomic_long_add(l, &mm->hugetlb_usage);
@ -1042,6 +1047,10 @@ static inline spinlock_t *huge_pte_lockptr(struct hstate *h,
return &mm->page_table_lock;
}
static inline void hugetlb_count_init(struct mm_struct *mm)
{
}
static inline void hugetlb_report_usage(struct seq_file *f, struct mm_struct *m)
{
}

8
include/linux/mmap_lock.h
View File

@ -101,14 +101,14 @@ static inline bool mmap_write_trylock(struct mm_struct *mm)
static inline void mmap_write_unlock(struct mm_struct *mm)
{
up_write(&mm->mmap_lock);
__mmap_lock_trace_released(mm, true);
up_write(&mm->mmap_lock);
}
static inline void mmap_write_downgrade(struct mm_struct *mm)
{
downgrade_write(&mm->mmap_lock);
__mmap_lock_trace_acquire_returned(mm, false, true);
downgrade_write(&mm->mmap_lock);
}
static inline void mmap_read_lock(struct mm_struct *mm)
@ -140,8 +140,8 @@ static inline bool mmap_read_trylock(struct mm_struct *mm)
static inline void mmap_read_unlock(struct mm_struct *mm)
{
up_read(&mm->mmap_lock);
__mmap_lock_trace_released(mm, false);
up_read(&mm->mmap_lock);
}
static inline bool mmap_read_trylock_non_owner(struct mm_struct *mm)
@ -155,8 +155,8 @@ static inline bool mmap_read_trylock_non_owner(struct mm_struct *mm)
static inline void mmap_read_unlock_non_owner(struct mm_struct *mm)
{
up_read_non_owner(&mm->mmap_lock);
__mmap_lock_trace_released(mm, false);
up_read_non_owner(&mm->mmap_lock);
}
static inline void mmap_assert_locked(struct mm_struct *mm)

10
include/linux/uaccess.h
View File

@ -200,16 +200,6 @@ copy_to_user(void __user *to, const void *from, unsigned long n)
n = _copy_to_user(to, from, n);
return n;
}
#ifdef CONFIG_COMPAT
static __always_inline unsigned long __must_check
copy_in_user(void __user *to, const void __user *from, unsigned long n)
{
might_fault();
if (access_ok(to, n) && access_ok(from, n))
n = raw_copy_in_user(to, from, n);
return n;
}
#endif
#ifndef copy_mc_to_kernel
/*

10
include/uapi/asm-generic/unistd.h
View File

@ -673,15 +673,15 @@ __SYSCALL(__NR_madvise, sys_madvise)
#define __NR_remap_file_pages 234
__SYSCALL(__NR_remap_file_pages, sys_remap_file_pages)
#define __NR_mbind 235
__SC_COMP(__NR_mbind, sys_mbind, compat_sys_mbind)
__SYSCALL(__NR_mbind, sys_mbind)
#define __NR_get_mempolicy 236
__SC_COMP(__NR_get_mempolicy, sys_get_mempolicy, compat_sys_get_mempolicy)
__SYSCALL(__NR_get_mempolicy, sys_get_mempolicy)
#define __NR_set_mempolicy 237
__SC_COMP(__NR_set_mempolicy, sys_set_mempolicy, compat_sys_set_mempolicy)
__SYSCALL(__NR_set_mempolicy, sys_set_mempolicy)
#define __NR_migrate_pages 238
__SC_COMP(__NR_migrate_pages, sys_migrate_pages, compat_sys_migrate_pages)
__SYSCALL(__NR_migrate_pages, sys_migrate_pages)
#define __NR_move_pages 239
__SC_COMP(__NR_move_pages, sys_move_pages, compat_sys_move_pages)
__SYSCALL(__NR_move_pages, sys_move_pages)
#endif
#define __NR_rt_tgsigqueueinfo 240

21
kernel/compat.c
View File

@ -269,24 +269,3 @@ get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat)
return 0;
}
EXPORT_SYMBOL_GPL(get_compat_sigset);
/*
* Allocate user-space memory for the duration of a single system call,
* in order to marshall parameters inside a compat thunk.
*/
void __user *compat_alloc_user_space(unsigned long len)
{
void __user *ptr;
/* If len would occupy more than half of the entire compat space... */
if (unlikely(len > (((compat_uptr_t)~0) >> 1)))
return NULL;
ptr = arch_compat_alloc_user_space(len);
if (unlikely(!access_ok(ptr, len)))
return NULL;
return ptr;
}
EXPORT_SYMBOL_GPL(compat_alloc_user_space);

1
kernel/fork.c
View File

@ -1063,6 +1063,7 @@ static struct mm_struct *mm_init(struct mm_struct *mm, struct task_struct *p,
mm->pmd_huge_pte = NULL;
#endif
mm_init_uprobes_state(mm);
hugetlb_count_init(mm);
if (current->mm) {
mm->flags = current->mm->flags & MMF_INIT_MASK;

103
kernel/kexec.c
View File

@ -19,26 +19,9 @@
#include "kexec_internal.h"
static int copy_user_segment_list(struct kimage *image,
unsigned long nr_segments,
struct kexec_segment __user *segments)
{
int ret;
size_t segment_bytes;
/* Read in the segments */
image->nr_segments = nr_segments;
segment_bytes = nr_segments * sizeof(*segments);
ret = copy_from_user(image->segment, segments, segment_bytes);
if (ret)
ret = -EFAULT;
return ret;
}
static int kimage_alloc_init(struct kimage **rimage, unsigned long entry,
unsigned long nr_segments,
struct kexec_segment __user *segments,
struct kexec_segment *segments,
unsigned long flags)
{
int ret;
@ -58,10 +41,8 @@ static int kimage_alloc_init(struct kimage **rimage, unsigned long entry,
return -ENOMEM;
image->start = entry;
ret = copy_user_segment_list(image, nr_segments, segments);
if (ret)
goto out_free_image;
image->nr_segments = nr_segments;
memcpy(image->segment, segments, nr_segments * sizeof(*segments));
if (kexec_on_panic) {
/* Enable special crash kernel control page alloc policy. */
@ -104,12 +85,23 @@ out_free_image:
}
static int do_kexec_load(unsigned long entry, unsigned long nr_segments,
struct kexec_segment __user *segments, unsigned long flags)
struct kexec_segment *segments, unsigned long flags)
{
struct kimage **dest_image, *image;
unsigned long i;
int ret;
/*
* Because we write directly to the reserved memory region when loading
* crash kernels we need a mutex here to prevent multiple crash kernels
* from attempting to load simultaneously, and to prevent a crash kernel
* from loading over the top of a in use crash kernel.
*
* KISS: always take the mutex.
*/
if (!mutex_trylock(&kexec_mutex))
return -EBUSY;
if (flags & KEXEC_ON_CRASH) {
dest_image = &kexec_crash_image;
if (kexec_crash_image)
@ -121,7 +113,8 @@ static int do_kexec_load(unsigned long entry, unsigned long nr_segments,
if (nr_segments == 0) {
/* Uninstall image */
kimage_free(xchg(dest_image, NULL));
return 0;
ret = 0;
goto out_unlock;
}
if (flags & KEXEC_ON_CRASH) {
/*
@ -134,7 +127,7 @@ static int do_kexec_load(unsigned long entry, unsigned long nr_segments,
ret = kimage_alloc_init(&image, entry, nr_segments, segments, flags);
if (ret)
return ret;
goto out_unlock;
if (flags & KEXEC_PRESERVE_CONTEXT)
image->preserve_context = 1;
@ -171,6 +164,8 @@ out:
arch_kexec_protect_crashkres();
kimage_free(image);
out_unlock:
mutex_unlock(&kexec_mutex);
return ret;
}
@ -236,7 +231,8 @@ static inline int kexec_load_check(unsigned long nr_segments,
SYSCALL_DEFINE4(kexec_load, unsigned long, entry, unsigned long, nr_segments,
struct kexec_segment __user *, segments, unsigned long, flags)
{
int result;
struct kexec_segment *ksegments;
unsigned long result;
result = kexec_load_check(nr_segments, flags);
if (result)
@ -247,20 +243,12 @@ SYSCALL_DEFINE4(kexec_load, unsigned long, entry, unsigned long, nr_segments,
((flags & KEXEC_ARCH_MASK) != KEXEC_ARCH_DEFAULT))
return -EINVAL;
/* Because we write directly to the reserved memory
* region when loading crash kernels we need a mutex here to
* prevent multiple crash kernels from attempting to load
* simultaneously, and to prevent a crash kernel from loading
* over the top of a in use crash kernel.
*
* KISS: always take the mutex.
*/
if (!mutex_trylock(&kexec_mutex))
return -EBUSY;
ksegments = memdup_user(segments, nr_segments * sizeof(ksegments[0]));
if (IS_ERR(ksegments))
return PTR_ERR(ksegments);
result = do_kexec_load(entry, nr_segments, segments, flags);
mutex_unlock(&kexec_mutex);
result = do_kexec_load(entry, nr_segments, ksegments, flags);
kfree(ksegments);
return result;
}
@ -272,7 +260,7 @@ COMPAT_SYSCALL_DEFINE4(kexec_load, compat_ulong_t, entry,
compat_ulong_t, flags)
{
struct compat_kexec_segment in;
struct kexec_segment out, __user *ksegments;
struct kexec_segment *ksegments;
unsigned long i, result;
result = kexec_load_check(nr_segments, flags);
@ -285,37 +273,26 @@ COMPAT_SYSCALL_DEFINE4(kexec_load, compat_ulong_t, entry,
if ((flags & KEXEC_ARCH_MASK) == KEXEC_ARCH_DEFAULT)
return -EINVAL;
ksegments = compat_alloc_user_space(nr_segments * sizeof(out));
ksegments = kmalloc_array(nr_segments, sizeof(ksegments[0]),
GFP_KERNEL);
if (!ksegments)
return -ENOMEM;
for (i = 0; i < nr_segments; i++) {
result = copy_from_user(&in, &segments[i], sizeof(in));
if (result)
return -EFAULT;
goto fail;
out.buf = compat_ptr(in.buf);
out.bufsz = in.bufsz;
out.mem = in.mem;
out.memsz = in.memsz;
result = copy_to_user(&ksegments[i], &out, sizeof(out));
if (result)
return -EFAULT;
ksegments[i].buf = compat_ptr(in.buf);
ksegments[i].bufsz = in.bufsz;
ksegments[i].mem = in.mem;
ksegments[i].memsz = in.memsz;
}
/* Because we write directly to the reserved memory
* region when loading crash kernels we need a mutex here to
* prevent multiple crash kernels from attempting to load
* simultaneously, and to prevent a crash kernel from loading
* over the top of a in use crash kernel.
*
* KISS: always take the mutex.
*/
if (!mutex_trylock(&kexec_mutex))
return -EBUSY;
result = do_kexec_load(entry, nr_segments, ksegments, flags);
mutex_unlock(&kexec_mutex);
fail:
kfree(ksegments);
return result;
}
#endif

5
kernel/sys_ni.c
View File

@ -292,15 +292,10 @@ COND_SYSCALL(process_madvise);
COND_SYSCALL(process_mrelease);
COND_SYSCALL(remap_file_pages);
COND_SYSCALL(mbind);
COND_SYSCALL_COMPAT(mbind);
COND_SYSCALL(get_mempolicy);
COND_SYSCALL_COMPAT(get_mempolicy);
COND_SYSCALL(set_mempolicy);
COND_SYSCALL_COMPAT(set_mempolicy);
COND_SYSCALL(migrate_pages);
COND_SYSCALL_COMPAT(migrate_pages);
COND_SYSCALL(move_pages);
COND_SYSCALL_COMPAT(move_pages);
COND_SYSCALL(perf_event_open);
COND_SYSCALL(accept4);

5
mm/hmm.c
View File

@ -295,10 +295,13 @@ static int hmm_vma_handle_pte(struct mm_walk *walk, unsigned long addr,
goto fault;
/*
* Bypass devmap pte such as DAX page when all pfn requested
* flags(pfn_req_flags) are fulfilled.
* Since each architecture defines a struct page for the zero page, just
* fall through and treat it like a normal page.
*/
if (pte_special(pte) && !is_zero_pfn(pte_pfn(pte))) {
if (pte_special(pte) && !pte_devmap(pte) &&
!is_zero_pfn(pte_pfn(pte))) {
if (hmm_pte_need_fault(hmm_vma_walk, pfn_req_flags, 0)) {
pte_unmap(ptep);
return -EFAULT;

3
mm/kmemleak.c
View File

@ -113,7 +113,8 @@
#define BYTES_PER_POINTER sizeof(void *)
/* GFP bitmask for kmemleak internal allocations */
#define gfp_kmemleak_mask(gfp) (((gfp) & (GFP_KERNEL | GFP_ATOMIC)) | \
#define gfp_kmemleak_mask(gfp) (((gfp) & (GFP_KERNEL | GFP_ATOMIC | \
__GFP_NOLOCKDEP)) | \
__GFP_NORETRY | __GFP_NOMEMALLOC | \
__GFP_NOWARN)

214
mm/mempolicy.c
View File

@ -1362,16 +1362,33 @@ mpol_out:
/*
* User space interface with variable sized bitmaps for nodelists.
*/
static int get_bitmap(unsigned long *mask, const unsigned long __user *nmask,
unsigned long maxnode)
{
unsigned long nlongs = BITS_TO_LONGS(maxnode);
int ret;
if (in_compat_syscall())
ret = compat_get_bitmap(mask,
(const compat_ulong_t __user *)nmask,
maxnode);
else
ret = copy_from_user(mask, nmask,
nlongs * sizeof(unsigned long));
if (ret)
return -EFAULT;
if (maxnode % BITS_PER_LONG)
mask[nlongs - 1] &= (1UL << (maxnode % BITS_PER_LONG)) - 1;
return 0;
}
/* Copy a node mask from user space. */
static int get_nodes(nodemask_t *nodes, const unsigned long __user *nmask,
unsigned long maxnode)
{
unsigned long k;
unsigned long t;
unsigned long nlongs;
unsigned long endmask;
--maxnode;
nodes_clear(*nodes);
if (maxnode == 0 || !nmask)
@ -1379,49 +1396,29 @@ static int get_nodes(nodemask_t *nodes, const unsigned long __user *nmask,
if (maxnode > PAGE_SIZE*BITS_PER_BYTE)
return -EINVAL;
nlongs = BITS_TO_LONGS(maxnode);
if ((maxnode % BITS_PER_LONG) == 0)
endmask = ~0UL;
else
endmask = (1UL << (maxnode % BITS_PER_LONG)) - 1;
/*
* When the user specified more nodes than supported just check
* if the non supported part is all zero.
*
* If maxnode have more longs than MAX_NUMNODES, check
* the bits in that area first. And then go through to
* check the rest bits which equal or bigger than MAX_NUMNODES.
* Otherwise, just check bits [MAX_NUMNODES, maxnode).
* if the non supported part is all zero, one word at a time,
* starting at the end.
*/
if (nlongs > BITS_TO_LONGS(MAX_NUMNODES)) {
for (k = BITS_TO_LONGS(MAX_NUMNODES); k < nlongs; k++) {
if (get_user(t, nmask + k))
return -EFAULT;
if (k == nlongs - 1) {
if (t & endmask)
return -EINVAL;
} else if (t)
return -EINVAL;
}
nlongs = BITS_TO_LONGS(MAX_NUMNODES);
endmask = ~0UL;
}
while (maxnode > MAX_NUMNODES) {
unsigned long bits = min_t(unsigned long, maxnode, BITS_PER_LONG);
unsigned long t;
if (maxnode > MAX_NUMNODES && MAX_NUMNODES % BITS_PER_LONG != 0) {
unsigned long valid_mask = endmask;
valid_mask &= ~((1UL << (MAX_NUMNODES % BITS_PER_LONG)) - 1);
if (get_user(t, nmask + nlongs - 1))
if (get_bitmap(&t, &nmask[maxnode / BITS_PER_LONG], bits))
return -EFAULT;
if (t & valid_mask)
if (maxnode - bits >= MAX_NUMNODES) {
maxnode -= bits;
} else {
maxnode = MAX_NUMNODES;
t &= ~((1UL << (MAX_NUMNODES % BITS_PER_LONG)) - 1);
}
if (t)
return -EINVAL;
}
if (copy_from_user(nodes_addr(*nodes), nmask, nlongs*sizeof(unsigned long)))
return -EFAULT;
nodes_addr(*nodes)[nlongs-1] &= endmask;
return 0;
return get_bitmap(nodes_addr(*nodes), nmask, maxnode);
}
/* Copy a kernel node mask to user space */
@ -1430,6 +1427,10 @@ static int copy_nodes_to_user(unsigned long __user *mask, unsigned long maxnode,
{
unsigned long copy = ALIGN(maxnode-1, 64) / 8;
unsigned int nbytes = BITS_TO_LONGS(nr_node_ids) * sizeof(long);
bool compat = in_compat_syscall();
if (compat)
nbytes = BITS_TO_COMPAT_LONGS(nr_node_ids) * sizeof(compat_long_t);
if (copy > nbytes) {
if (copy > PAGE_SIZE)
@ -1437,7 +1438,13 @@ static int copy_nodes_to_user(unsigned long __user *mask, unsigned long maxnode,
if (clear_user((char __user *)mask + nbytes, copy - nbytes))
return -EFAULT;
copy = nbytes;
maxnode = nr_node_ids;
}
if (compat)
return compat_put_bitmap((compat_ulong_t __user *)mask,
nodes_addr(*nodes), maxnode);
return copy_to_user(mask, nodes_addr(*nodes), copy) ? -EFAULT : 0;
}
@ -1642,116 +1649,6 @@ SYSCALL_DEFINE5(get_mempolicy, int __user *, policy,
return kernel_get_mempolicy(policy, nmask, maxnode, addr, flags);
}
#ifdef CONFIG_COMPAT
COMPAT_SYSCALL_DEFINE5(get_mempolicy, int __user *, policy,
compat_ulong_t __user *, nmask,
compat_ulong_t, maxnode,
compat_ulong_t, addr, compat_ulong_t, flags)
{
long err;
unsigned long __user *nm = NULL;
unsigned long nr_bits, alloc_size;
DECLARE_BITMAP(bm, MAX_NUMNODES);
nr_bits = min_t(unsigned long, maxnode-1, nr_node_ids);
alloc_size = ALIGN(nr_bits, BITS_PER_LONG) / 8;
if (nmask)
nm = compat_alloc_user_space(alloc_size);
err = kernel_get_mempolicy(policy, nm, nr_bits+1, addr, flags);
if (!err && nmask) {
unsigned long copy_size;
copy_size = min_t(unsigned long, sizeof(bm), alloc_size);
err = copy_from_user(bm, nm, copy_size);
/* ensure entire bitmap is zeroed */
err |= clear_user(nmask, ALIGN(maxnode-1, 8) / 8);
err |= compat_put_bitmap(nmask, bm, nr_bits);
}
return err;
}
COMPAT_SYSCALL_DEFINE3(set_mempolicy, int, mode, compat_ulong_t __user *, nmask,
compat_ulong_t, maxnode)
{
unsigned long __user *nm = NULL;
unsigned long nr_bits, alloc_size;
DECLARE_BITMAP(bm, MAX_NUMNODES);
nr_bits = min_t(unsigned long, maxnode-1, MAX_NUMNODES);
alloc_size = ALIGN(nr_bits, BITS_PER_LONG) / 8;
if (nmask) {
if (compat_get_bitmap(bm, nmask, nr_bits))
return -EFAULT;
nm = compat_alloc_user_space(alloc_size);
if (copy_to_user(nm, bm, alloc_size))
return -EFAULT;
}
return kernel_set_mempolicy(mode, nm, nr_bits+1);
}
COMPAT_SYSCALL_DEFINE6(mbind, compat_ulong_t, start, compat_ulong_t, len,
compat_ulong_t, mode, compat_ulong_t __user *, nmask,
compat_ulong_t, maxnode, compat_ulong_t, flags)
{
unsigned long __user *nm = NULL;
unsigned long nr_bits, alloc_size;
nodemask_t bm;
nr_bits = min_t(unsigned long, maxnode-1, MAX_NUMNODES);
alloc_size = ALIGN(nr_bits, BITS_PER_LONG) / 8;
if (nmask) {
if (compat_get_bitmap(nodes_addr(bm), nmask, nr_bits))
return -EFAULT;
nm = compat_alloc_user_space(alloc_size);
if (copy_to_user(nm, nodes_addr(bm), alloc_size))
return -EFAULT;
}
return kernel_mbind(start, len, mode, nm, nr_bits+1, flags);
}
COMPAT_SYSCALL_DEFINE4(migrate_pages, compat_pid_t, pid,
compat_ulong_t, maxnode,
const compat_ulong_t __user *, old_nodes,
const compat_ulong_t __user *, new_nodes)
{
unsigned long __user *old = NULL;
unsigned long __user *new = NULL;
nodemask_t tmp_mask;
unsigned long nr_bits;
unsigned long size;
nr_bits = min_t(unsigned long, maxnode - 1, MAX_NUMNODES);
size = ALIGN(nr_bits, BITS_PER_LONG) / 8;
if (old_nodes) {
if (compat_get_bitmap(nodes_addr(tmp_mask), old_nodes, nr_bits))
return -EFAULT;
old = compat_alloc_user_space(new_nodes ? size * 2 : size);
if (new_nodes)
new = old + size / sizeof(unsigned long);
if (copy_to_user(old, nodes_addr(tmp_mask), size))
return -EFAULT;
}
if (new_nodes) {
if (compat_get_bitmap(nodes_addr(tmp_mask), new_nodes, nr_bits))
return -EFAULT;
if (new == NULL)
new = compat_alloc_user_space(size);
if (copy_to_user(new, nodes_addr(tmp_mask), size))
return -EFAULT;
}
return kernel_migrate_pages(pid, nr_bits + 1, old, new);
}
#endif /* CONFIG_COMPAT */
bool vma_migratable(struct vm_area_struct *vma)
{
if (vma->vm_flags & (VM_IO | VM_PFNMAP))
@ -1979,17 +1876,26 @@ unsigned int mempolicy_slab_node(void)
*/
static unsigned offset_il_node(struct mempolicy *pol, unsigned long n)
{
unsigned nnodes = nodes_weight(pol->nodes);
unsigned target;
nodemask_t nodemask = pol->nodes;
unsigned int target, nnodes;
int i;
int nid;
/*
* The barrier will stabilize the nodemask in a register or on
* the stack so that it will stop changing under the code.
*
* Between first_node() and next_node(), pol->nodes could be changed
* by other threads. So we put pol->nodes in a local stack.
*/
barrier();
nnodes = nodes_weight(nodemask);
if (!nnodes)
return numa_node_id();
target = (unsigned int)n % nnodes;
nid = first_node(pol->nodes);
nid = first_node(nodemask);
for (i = 0; i < target; i++)
nid = next_node(nid, pol->nodes);
nid = next_node(nid, nodemask);
return nid;
}

61
mm/migrate.c
View File

@ -960,7 +960,7 @@ static int __unmap_and_move(struct page *page, struct page *newpage,
int force, enum migrate_mode mode)
{
int rc = -EAGAIN;
int page_was_mapped = 0;
bool page_was_mapped = false;
struct anon_vma *anon_vma = NULL;
bool is_lru = !__PageMovable(page);
@ -1008,7 +1008,7 @@ static int __unmap_and_move(struct page *page, struct page *newpage,
}
/*
* By try_to_unmap(), page->mapcount goes down to 0 here. In this case,
* By try_to_migrate(), page->mapcount goes down to 0 here. In this case,
* we cannot notice that anon_vma is freed while we migrates a page.
* This get_anon_vma() delays freeing anon_vma pointer until the end
* of migration. File cache pages are no problem because of page_lock()
@ -1063,7 +1063,7 @@ static int __unmap_and_move(struct page *page, struct page *newpage,
VM_BUG_ON_PAGE(PageAnon(page) && !PageKsm(page) && !anon_vma,
page);
try_to_migrate(page, 0);
page_was_mapped = 1;
page_was_mapped = true;
}
if (!page_mapped(page))
@ -1900,6 +1900,23 @@ set_status:
mmap_read_unlock(mm);
}
static int get_compat_pages_array(const void __user *chunk_pages[],
const void __user * __user *pages,
unsigned long chunk_nr)
{
compat_uptr_t __user *pages32 = (compat_uptr_t __user *)pages;
compat_uptr_t p;
int i;
for (i = 0; i < chunk_nr; i++) {
if (get_user(p, pages32 + i))
return -EFAULT;
chunk_pages[i] = compat_ptr(p);
}
return 0;
}
/*
* Determine the nodes of a user array of pages and store it in
* a user array of status.
@ -1919,8 +1936,15 @@ static int do_pages_stat(struct mm_struct *mm, unsigned long nr_pages,
if (chunk_nr > DO_PAGES_STAT_CHUNK_NR)
chunk_nr = DO_PAGES_STAT_CHUNK_NR;
if (copy_from_user(chunk_pages, pages, chunk_nr * sizeof(*chunk_pages)))
break;
if (in_compat_syscall()) {
if (get_compat_pages_array(chunk_pages, pages,
chunk_nr))
break;
} else {
if (copy_from_user(chunk_pages, pages,
chunk_nr * sizeof(*chunk_pages)))
break;
}
do_pages_stat_array(mm, chunk_nr, chunk_pages, chunk_status);
@ -2023,28 +2047,6 @@ SYSCALL_DEFINE6(move_pages, pid_t, pid, unsigned long, nr_pages,
return kernel_move_pages(pid, nr_pages, pages, nodes, status, flags);
}
#ifdef CONFIG_COMPAT
COMPAT_SYSCALL_DEFINE6(move_pages, pid_t, pid, compat_ulong_t, nr_pages,
compat_uptr_t __user *, pages32,
const int __user *, nodes,
int __user *, status,
int, flags)
{
const void __user * __user *pages;
int i;
pages = compat_alloc_user_space(nr_pages * sizeof(void *));
for (i = 0; i < nr_pages; i++) {
compat_uptr_t p;
if (get_user(p, pages32 + i) ||
put_user(compat_ptr(p), pages + i))
return -EFAULT;
}
return kernel_move_pages(pid, nr_pages, pages, nodes, status, flags);
}
#endif /* CONFIG_COMPAT */
#ifdef CONFIG_NUMA_BALANCING
/*
* Returns true if this is a safe migration target node for misplaced NUMA
@ -2107,6 +2109,7 @@ out:
static int numamigrate_isolate_page(pg_data_t *pgdat, struct page *page)
{
int page_lru;
int nr_pages = thp_nr_pages(page);
VM_BUG_ON_PAGE(compound_order(page) && !PageTransHuge(page), page);
@ -2115,7 +2118,7 @@ static int numamigrate_isolate_page(pg_data_t *pgdat, struct page *page)
return 0;
/* Avoid migrating to a node that is nearly full */
if (!migrate_balanced_pgdat(pgdat, compound_nr(page)))
if (!migrate_balanced_pgdat(pgdat, nr_pages))
return 0;
if (isolate_lru_page(page))
@ -2123,7 +2126,7 @@ static int numamigrate_isolate_page(pg_data_t *pgdat, struct page *page)
page_lru = page_is_file_lru(page);
mod_node_page_state(page_pgdat(page), NR_ISOLATED_ANON + page_lru,
thp_nr_pages(page));
nr_pages);
/*
* Isolating the page has taken another reference, so the

4
mm/page_alloc.c
View File

@ -3428,8 +3428,10 @@ void free_unref_page_list(struct list_head *list)
/* Prepare pages for freeing */
list_for_each_entry_safe(page, next, list, lru) {
pfn = page_to_pfn(page);
if (!free_unref_page_prepare(page, pfn, 0))
if (!free_unref_page_prepare(page, pfn, 0)) {
list_del(&page->lru);
continue;
}
/*
* Free isolated pages directly to the allocator, see

2
mm/vmscan.c
View File

@ -2715,7 +2715,7 @@ out:
cgroup_size = max(cgroup_size, protection);
scan = lruvec_size - lruvec_size * protection /
cgroup_size;
(cgroup_size + 1);
/*
* Minimally target SWAP_CLUSTER_MAX pages to keep

48
mm/vmstat.c
View File

@ -319,6 +319,16 @@ void __mod_zone_page_state(struct zone *zone, enum zone_stat_item item,
long x;
long t;
/*
* Accurate vmstat updates require a RMW. On !PREEMPT_RT kernels,
* atomicity is provided by IRQs being disabled -- either explicitly
* or via local_lock_irq. On PREEMPT_RT, local_lock_irq only disables
* CPU migrations and preemption potentially corrupts a counter so
* disable preemption.
*/
if (IS_ENABLED(CONFIG_PREEMPT_RT))
preempt_disable();
x = delta + __this_cpu_read(*p);
t = __this_cpu_read(pcp->stat_threshold);
@ -328,6 +338,9 @@ void __mod_zone_page_state(struct zone *zone, enum zone_stat_item item,
x = 0;
}
__this_cpu_write(*p, x);
if (IS_ENABLED(CONFIG_PREEMPT_RT))
preempt_enable();
}
EXPORT_SYMBOL(__mod_zone_page_state);
@ -350,6 +363,10 @@ void __mod_node_page_state(struct pglist_data *pgdat, enum node_stat_item item,
delta >>= PAGE_SHIFT;
}
/* See __mod_node_page_state */
if (IS_ENABLED(CONFIG_PREEMPT_RT))
preempt_disable();
x = delta + __this_cpu_read(*p);
t = __this_cpu_read(pcp->stat_threshold);
@ -359,6 +376,9 @@ void __mod_node_page_state(struct pglist_data *pgdat, enum node_stat_item item,
x = 0;
}
__this_cpu_write(*p, x);
if (IS_ENABLED(CONFIG_PREEMPT_RT))
preempt_enable();
}
EXPORT_SYMBOL(__mod_node_page_state);
@ -391,6 +411,10 @@ void __inc_zone_state(struct zone *zone, enum zone_stat_item item)
s8 __percpu *p = pcp->vm_stat_diff + item;
s8 v, t;
/* See __mod_node_page_state */
if (IS_ENABLED(CONFIG_PREEMPT_RT))
preempt_disable();
v = __this_cpu_inc_return(*p);
t = __this_cpu_read(pcp->stat_threshold);
if (unlikely(v > t)) {
@ -399,6 +423,9 @@ void __inc_zone_state(struct zone *zone, enum zone_stat_item item)
zone_page_state_add(v + overstep, zone, item);
__this_cpu_write(*p, -overstep);
}
if (IS_ENABLED(CONFIG_PREEMPT_RT))
preempt_enable();
}
void __inc_node_state(struct pglist_data *pgdat, enum node_stat_item item)
@ -409,6 +436,10 @@ void __inc_node_state(struct pglist_data *pgdat, enum node_stat_item item)
VM_WARN_ON_ONCE(vmstat_item_in_bytes(item));
/* See __mod_node_page_state */
if (IS_ENABLED(CONFIG_PREEMPT_RT))
preempt_disable();
v = __this_cpu_inc_return(*p);
t = __this_cpu_read(pcp->stat_threshold);
if (unlikely(v > t)) {
@ -417,6 +448,9 @@ void __inc_node_state(struct pglist_data *pgdat, enum node_stat_item item)
node_page_state_add(v + overstep, pgdat, item);
__this_cpu_write(*p, -overstep);
}
if (IS_ENABLED(CONFIG_PREEMPT_RT))
preempt_enable();
}
void __inc_zone_page_state(struct page *page, enum zone_stat_item item)
@ -437,6 +471,10 @@ void __dec_zone_state(struct zone *zone, enum zone_stat_item item)
s8 __percpu *p = pcp->vm_stat_diff + item;
s8 v, t;
/* See __mod_node_page_state */
if (IS_ENABLED(CONFIG_PREEMPT_RT))
preempt_disable();
v = __this_cpu_dec_return(*p);
t = __this_cpu_read(pcp->stat_threshold);
if (unlikely(v < - t)) {
@ -445,6 +483,9 @@ void __dec_zone_state(struct zone *zone, enum zone_stat_item item)
zone_page_state_add(v - overstep, zone, item);
__this_cpu_write(*p, overstep);
}
if (IS_ENABLED(CONFIG_PREEMPT_RT))
preempt_enable();
}
void __dec_node_state(struct pglist_data *pgdat, enum node_stat_item item)
@ -455,6 +496,10 @@ void __dec_node_state(struct pglist_data *pgdat, enum node_stat_item item)
VM_WARN_ON_ONCE(vmstat_item_in_bytes(item));
/* See __mod_node_page_state */
if (IS_ENABLED(CONFIG_PREEMPT_RT))
preempt_disable();
v = __this_cpu_dec_return(*p);
t = __this_cpu_read(pcp->stat_threshold);
if (unlikely(v < - t)) {
@ -463,6 +508,9 @@ void __dec_node_state(struct pglist_data *pgdat, enum node_stat_item item)
node_page_state_add(v - overstep, pgdat, item);
__this_cpu_write(*p, overstep);
}
if (IS_ENABLED(CONFIG_PREEMPT_RT))
preempt_enable();
}
void __dec_zone_page_state(struct page *page, enum zone_stat_item item)