Jan Kara 4628a64591 mm: Preserve _PAGE_DEVMAP across mprotect() calls ... Currently _PAGE_DEVMAP bit is not preserved in mprotect(2) calls. As a result we will see warnings such as: BUG: Bad page map in process JobWrk0013 pte:800001803875ea25 pmd:7624381067 addr:00007f0930720000 vm_flags:280000f9 anon_vma: (null) mapping:ffff97f2384056f0 index:0 file:457-000000fe00000030-00000009-000000ca-00000001_2001.fileblock fault:xfs_filemap_fault [xfs] mmap:xfs_file_mmap [xfs] readpage: (null) CPU: 3 PID: 15848 Comm: JobWrk0013 Tainted: G W 4.12.14-2.g7573215-default #1 SLE12-SP4 (unreleased) Hardware name: Intel Corporation S2600WFD/S2600WFD, BIOS SE5C620.86B.01.00.0833.051120182255 05/11/2018 Call Trace: dump_stack+0x5a/0x75 print_bad_pte+0x217/0x2c0 ? enqueue_task_fair+0x76/0x9f0 _vm_normal_page+0xe5/0x100 zap_pte_range+0x148/0x740 unmap_page_range+0x39a/0x4b0 unmap_vmas+0x42/0x90 unmap_region+0x99/0xf0 ? vma_gap_callbacks_rotate+0x1a/0x20 do_munmap+0x255/0x3a0 vm_munmap+0x54/0x80 SyS_munmap+0x1d/0x30 do_syscall_64+0x74/0x150 entry_SYSCALL_64_after_hwframe+0x3d/0xa2 ... when mprotect(2) gets used on DAX mappings. Also there is a wide variety of other failures that can result from the missing _PAGE_DEVMAP flag when the area gets used by get_user_pages() later. Fix the problem by including _PAGE_DEVMAP in a set of flags that get preserved by mprotect(2). Fixes: 69660fd797 ("x86, mm: introduce _PAGE_DEVMAP") Fixes: ebd3119793 ("powerpc/mm: Add devmap support for ppc64") Cc: <stable@vger.kernel.org> Signed-off-by: Jan Kara <jack@suse.cz> Acked-by: Michal Hocko <mhocko@suse.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>		2018-10-09 11:44:58 -07:00
..
alpha	Merge branch 'userns-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2018-08-24 09:25:39 -07:00
arc	ARC: don't check for HIGHMEM pages in arch_dma_alloc	2018-09-04 13:21:38 -07:00
arm	ARM: dts: at91: add new compatibility string for macb on sama5d3	2018-09-17 07:54:40 -07:00
arm64	arm64: kernel: arch_crash_save_vmcoreinfo() should depend on CONFIG_CRASH_CORE	2018-09-11 11:08:49 +01:00
c6x	kbuild: rename LDFLAGS to KBUILD_LDFLAGS	2018-08-24 08:22:08 +09:00
h8300	Kbuild updates for v4.19 (2nd)	2018-08-25 13:40:38 -07:00
hexagon	hexagon: modify ffs() and fls() to return int	2018-09-10 19:42:15 -05:00
ia64	ia64: Fix allnoconfig section mismatch for ioc_init/ioc_iommu_info	2018-08-22 14:12:47 -07:00
m68k	m68k: fix early memory reservation for ColdFire MMU systems	2018-09-03 10:19:36 +10:00
microblaze	kbuild: rename LDFLAGS to KBUILD_LDFLAGS	2018-08-24 08:22:08 +09:00
mips	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2018-09-12 17:32:50 -10:00
nds32	nds32: linker script: GCOV kernel may refers data in __exit	2018-09-05 10:16:26 +08:00
nios2	nios2: kconfig: remove duplicate DEBUG_STACK_USAGE symbol defintions	2018-08-27 09:47:20 +08:00
openrisc	OpenRISC updates for 4.19	2018-08-23 14:09:37 -07:00
parisc	Merge branch 'parisc-4.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux	2018-08-22 14:06:37 -07:00
powerpc	mm: Preserve _PAGE_DEVMAP across mprotect() calls	2018-10-09 11:44:58 -07:00
riscv	RISC-V: include linux/ftrace.h in asm-prototypes.h	2018-09-24 13:12:27 -07:00
s390	KVM: s390: Fixes for 4.19	2018-09-18 15:12:51 +02:00
sh	kbuild: rename LDFLAGS to KBUILD_LDFLAGS	2018-08-24 08:22:08 +09:00
sparc	sparc: set a default 32-bit dma mask for OF devices	2018-09-02 10:02:04 +02:00
um	kbuild: rename LDFLAGS to KBUILD_LDFLAGS	2018-08-24 08:22:08 +09:00
unicore32	mm: convert return type of handle_mm_fault() caller to vm_fault_t	2018-08-17 16:20:28 -07:00
x86	mm: Preserve _PAGE_DEVMAP across mprotect() calls	2018-10-09 11:44:58 -07:00
xtensa	xtensa: enable SG chaining in Kconfig	2018-09-11 22:12:59 -07:00
.gitignore
Kconfig	Merge branch 'tlb-fixes'	2018-08-23 14:55:01 -07:00