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linux/arch/x86/mm
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Joerg Roedel d6ef1f194b x86/mm: Prevent kernel Oops in PTDUMP code with HIGHPTE=y 
The walk_pte_level() function just uses __va to get the virtual address of
the PTE page, but that breaks when the PTE page is not in the direct
mapping with HIGHPTE=y.

The result is an unhandled kernel paging request at some random address
when accessing the current_kernel or current_user file.

Use the correct API to access PTE pages.

Fixes: fe770bf031 ('x86: clean up the page table dumper and add 32-bit support')
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Cc: jgross@suse.com
Cc: JBeulich@suse.com
Cc: hpa@zytor.com
Cc: aryabinin@virtuozzo.com
Cc: kirill.shutemov@linux.intel.com
Link: https://lkml.kernel.org/r/1523971636-4137-1-git-send-email-joro@8bytes.org
2018-04-17 15:43:01 +02:00
..
amdtopology.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cpu_entry_area.c x86/pti: Enable global pages for shared areas 2018-04-12 09:05:59 +02:00
debug_pagetables.c x86/efi: Replace efi_pgd with efi_mm.pgd 2018-03-12 11:05:05 +01:00
dump_pagetables.c x86/mm: Prevent kernel Oops in PTDUMP code with HIGHPTE=y 2018-04-17 15:43:01 +02:00
extable.c x86/extable: Mark exception handler functions visible 2018-01-14 20:04:16 +01:00
fault.c Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-04-02 15:45:30 -07:00
highmem_32.c
hugetlbpage.c x86/mm: Prevent non-MAP_FIXED mapping across DEFAULT_MAP_WINDOW border 2017-11-16 11:43:11 +01:00
ident_map.c x86/mm: Do not auto-massage page protections 2018-04-12 09:04:22 +02:00
init_32.c Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-04-15 13:35:29 -07:00
init_64.c Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-04-15 13:35:29 -07:00
init.c x86/pti: Never implicitly clear _PAGE_GLOBAL for kernel image 2018-04-12 09:06:00 +02:00
iomap_32.c x86/mm: Do not auto-massage page protections 2018-04-12 09:04:22 +02:00
ioremap.c x86/mm: Do not auto-massage page protections 2018-04-12 09:04:22 +02:00
kasan_init_64.c x86/mm: Do not auto-massage page protections 2018-04-12 09:04:22 +02:00
kaslr.c x86/mm: Replace compile-time checks for 5-level paging with runtime-time checks 2018-02-16 10:48:49 +01:00
kmmio.c x86/mm: Rename flush_tlb_single() and flush_tlb_one() to __flush_tlb_one_[user|kernel]() 2018-02-15 01:15:52 +01:00
Makefile x86/mm/sme: Disable stack protection for mem_encrypt_identity.c 2018-02-28 15:24:12 +01:00
mem_encrypt_boot.S x86/mm/sme, objtool: Annotate indirect call in sme_encrypt_execute() 2018-02-21 09:05:04 +01:00
mem_encrypt_identity.c x86/mm/sme: Disable stack protection for mem_encrypt_identity.c 2018-02-28 15:24:12 +01:00
mem_encrypt.c dma/direct: Handle force decryption for DMA coherent buffers in common code 2018-03-20 10:01:59 +01:00
mm_internal.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mmap.c exec: pass stack rlimit into mm layout functions 2018-04-11 10:28:37 -07:00
mmio-mod.c x86: do not use print_symbol() 2018-01-05 15:23:01 +01:00
mpx.c Merge branch 'x86/mpx' into x86/asm, to pick up dependent commits 2017-11-08 10:55:48 +01:00
numa_32.c x86/mm/32: Remove unused node_memmap_size_bytes() & CONFIG_NEED_NODE_MEMMAP_SIZE logic 2018-03-27 08:45:02 +02:00
numa_64.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
numa_emulation.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
numa_internal.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
numa.c Merge branch 'x86/boot' into x86/mm, to avoid conflict 2017-04-11 08:56:05 +02:00
pageattr-test.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pageattr.c x86/pti: Never implicitly clear _PAGE_GLOBAL for kernel image 2018-04-12 09:06:00 +02:00
pat_internal.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pat_rbtree.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pat.c x86/mm: add a function to check if a pfn is UC/UC-/WC 2018-01-16 16:40:09 +01:00
pf_in.c
pf_in.h
pgtable_32.c x86/mm: Rename flush_tlb_single() and flush_tlb_one() to __flush_tlb_one_[user|kernel]() 2018-02-15 01:15:52 +01:00
pgtable.c x86/pgtable: Don't set huge PUD/PMD on non-leaf entries 2018-04-12 09:41:41 +02:00
physaddr.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
physaddr.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pkeys.c x86/fpu: Rename fpu::fpstate_active to fpu::initialized 2017-09-26 09:43:36 +02:00
pti.c x86/pti: Leave kernel text global for !PCID 2018-04-12 09:06:00 +02:00
setup_nx.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
srat.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
testmmiotrace.c Annotate hardware config module parameters in arch/x86/mm/ 2017-04-04 16:54:21 +01:00
tlb.c Merge branch 'x86/mm' into efi/core 2018-03-12 10:03:09 +01:00