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linux/arch/x86/mm
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Michal Koutný a3f547addc x86/mm: Do not shuffle CPU entry areas without KASLR 
The commit 97e3d26b5e5f ("x86/mm: Randomize per-cpu entry area") fixed
an omission of KASLR on CPU entry areas. It doesn't take into account
KASLR switches though, which may result in unintended non-determinism
when a user wants to avoid it (e.g. debugging, benchmarking).

Generate only a single combination of CPU entry areas offsets -- the
linear array that existed prior randomization when KASLR is turned off.

Since we have 3f148f331814 ("x86/kasan: Map shadow for percpu pages on
demand") and followups, we can use the more relaxed guard
kasrl_enabled() (in contrast to kaslr_memory_enabled()).

Fixes: 97e3d26b5e5f ("x86/mm: Randomize per-cpu entry area")
Signed-off-by: Michal Koutný <mkoutny@suse.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/all/20230306193144.24605-1-mkoutny%40suse.com
2023-03-22 10:42:47 -07:00
..
pat
- Daniel Verkamp has contributed a memfd series ("mm/memfd: add
2023-02-23 17:09:35 -08:00
amdtopology.c
x86/mm: Replace nodes_weight() with nodes_empty() where appropriate
2022-04-10 22:35:38 +02:00
cpu_entry_area.c
x86/mm: Do not shuffle CPU entry areas without KASLR
2023-03-22 10:42:47 -07:00
debug_pagetables.c
mm: introduce include/linux/pgtable.h
2020-06-09 09:39:13 -07:00
dump_pagetables.c
mm: don't include asm/pgtable.h if linux/mm.h is already included
2020-06-09 09:39:13 -07:00
extable.c
x86: simplify load_unaligned_zeropad() implementation
2022-08-16 11:03:38 -07:00
fault.c
Revert "x86: kmsan: sync metadata pages on page fault"
2023-02-02 22:33:01 -08:00
highmem_32.c
x86/mm/highmem: Use generic kmap atomic implementation
2020-11-06 23:14:55 +01:00
hugetlbpage.c
arch/x86/mm/hugetlbpage.c: pud_huge() returns 0 when using 2-level paging
2022-11-08 15:57:25 -08:00
ident_map.c
x86/mm/ident_map: Check for errors from ident_pud_init()
2020-10-28 14:48:30 +01:00
init_32.c
x86: mm: rename __is_kernel_text() to is_x86_32_kernel_text()
2021-11-09 10:02:51 -08:00
init_64.c
mm/sparse-vmemmap: generalise vmemmap_populate_hugepages()
2022-12-11 18:12:12 -08:00
init.c
x86/mm: fix poking_init() for Xen PV guests
2023-01-12 11:22:20 +01:00
iomap_32.c
io-mapping: Cleanup atomic iomap
2020-11-06 23:14:58 +01:00
ioremap.c
x86/ioremap: Fix page aligned size calculation in __ioremap_caller()
2022-11-22 12:21:16 +01:00
kasan_init_64.c
x86/kasan: Populate shadow for shared chunk of the CPU entry area
2022-12-15 10:37:28 -08:00
kaslr.c
x86: Fix various typos in comments
2021-03-18 15:31:53 +01:00
kmmio.c
x86/mm/kmmio: Remove redundant preempt_disable()
2022-12-12 10:54:48 -05:00
kmsan_shadow.c
x86: kmsan: handle CPU entry area
2022-10-03 14:03:26 -07:00
maccess.c
x86: Share definition of __is_canonical_address()
2022-02-02 13:11:42 +01:00
Makefile
x86: kmsan: handle CPU entry area
2022-10-03 14:03:26 -07:00
mem_encrypt_amd.c
- The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe
2022-08-05 16:32:45 -07:00
mem_encrypt_boot.S
x86/mm: Remove P*D_PAGE_MASK and P*D_PAGE_SIZE macros
2022-12-15 10:37:27 -08:00
mem_encrypt_identity.c
x86/mm: Fix use of uninitialized buffer in sme_enable()
2023-03-16 12:22:25 +01:00
mem_encrypt.c
virtio: replace arch_has_restricted_virtio_memory_access()
2022-06-06 08:22:01 +02:00
mm_internal.h
x86/mm: thread pgprot_t through init_memory_mapping()
2020-04-10 15:36:21 -07:00
mmap.c
x86/mm/mmap: Fix -Wmissing-prototypes warnings
2020-04-22 20:19:48 +02:00
mmio-mod.c
x86: Replace cpumask_weight() with cpumask_empty() where appropriate
2022-04-10 22:35:38 +02:00
numa_32.c
x86/mm: Drop deprecated DISCONTIGMEM support for 32-bit
2020-05-28 18:34:30 +02:00
numa_64.c
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
numa_emulation.c
x86/mm: Replace nodes_weight() with nodes_empty() where appropriate
2022-04-10 22:35:38 +02:00
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
x86/numa: Use cpumask_available instead of hardcoded NULL check
2022-08-03 11:44:57 +02:00
pf_in.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
pf_in.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
pgprot.c
x86/mm: move protection_map[] inside the platform
2022-07-17 17:14:38 -07:00
pgtable_32.c
mm: remove unneeded includes of <asm/pgalloc.h>
2020-08-07 11:33:26 -07:00
pgtable.c
mm/pgtable: Fix multiple -Wstringop-overflow warnings
2022-12-01 08:50:38 -08:00
physaddr.c
mm, x86/mm: Untangle address space layout definitions from basic pgtable type definitions
2019-12-10 10:12:55 +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/pkeys: Clarify PKRU_AD_KEY macro
2022-06-07 16:06:33 -07:00
pti.c
x86/mm: Remove P*D_PAGE_MASK and P*D_PAGE_SIZE macros
2022-12-15 10:37:27 -08:00
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
remove ioremap_nocache and devm_ioremap_nocache
2020-01-06 09:45:59 +01:00
tlb.c
x86/cpu: Use cpu_feature_enabled() when checking global pages support
2023-01-25 10:32:06 +01:00