kernel_optimize_test/mm
Catalin Marinas 24cecc3774 arm64: Revert support for execute-only user mappings
The ARMv8 64-bit architecture supports execute-only user permissions by
clearing the PTE_USER and PTE_UXN bits, practically making it a mostly
privileged mapping but from which user running at EL0 can still execute.

The downside, however, is that the kernel at EL1 inadvertently reading
such mapping would not trip over the PAN (privileged access never)
protection.

Revert the relevant bits from commit cab15ce604 ("arm64: Introduce
execute-only page access permissions") so that PROT_EXEC implies
PROT_READ (and therefore PTE_USER) until the architecture gains proper
support for execute-only user mappings.

Fixes: cab15ce604 ("arm64: Introduce execute-only page access permissions")
Cc: <stable@vger.kernel.org> # 4.9.x-
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-01-06 10:10:07 -08:00
..
kasan kasan: use apply_to_existing_page_range() for releasing vmalloc shadow 2019-12-17 20:59:59 -08:00
backing-dev.c
balloon_compaction.c
cleancache.c
cma_debug.c mm/cma_debug.c: use DEFINE_DEBUGFS_ATTRIBUTE to define debugfs fops 2019-12-01 12:59:09 -08:00
cma.c mm/cma.c: switch to bitmap_zalloc() for cma bitmap allocation 2019-12-01 12:59:09 -08:00
cma.h
compaction.c
debug_page_ref.c
debug.c mm/debug.c: PageAnon() is true for PageKsm() pages 2019-11-15 18:34:00 -08:00
dmapool.c
early_ioremap.c
fadvise.c
failslab.c
filemap.c mm: drop mmap_sem before calling balance_dirty_pages() in write fault 2019-12-01 06:29:18 -08:00
frame_vector.c
frontswap.c
gup_benchmark.c mm/gup: fix memory leak in __gup_benchmark_ioctl 2020-01-04 13:55:09 -08:00
gup.c mm/gup.c: fix comments of __get_user_pages() and get_user_pages_remote() 2019-12-01 06:29:18 -08:00
highmem.c
hmm.c mm/hmm: remove hmm_range_dma_map and hmm_range_dma_unmap 2019-11-23 19:56:45 -04:00
huge_memory.c mm/huge_memory.c: split_huge_pages_fops should be defined with DEFINE_DEBUGFS_ATTRIBUTE 2019-12-01 12:59:09 -08:00
hugetlb_cgroup.c mm: hugetlb: switch to css_tryget() in hugetlb_cgroup_charge_cgroup() 2019-11-15 18:34:00 -08:00
hugetlb.c mm/hugetlb: defer freeing of huge pages if in non-task context 2020-01-04 13:55:09 -08:00
hwpoison-inject.c mm/hwpoison-inject: use DEFINE_DEBUGFS_ATTRIBUTE to define debugfs fops 2019-12-01 12:59:09 -08:00
init-mm.c
internal.h mm, pcpu: make zone pcp updates and reset internal to the mm 2019-12-01 12:59:06 -08:00
interval_tree.c
Kconfig mm/Kconfig: fix trivial help text punctuation 2019-12-01 12:59:10 -08:00
Kconfig.debug
khugepaged.c mm/thp: flush file for !is_shmem PageDirty() case in collapse_file() 2019-12-01 12:59:09 -08:00
kmemleak-test.c
kmemleak.c
ksm.c * PPC secure guest support 2019-12-04 11:08:30 -08:00
list_lru.c
maccess.c
madvise.c mm/madvise.c: use PAGE_ALIGN[ED] for range checking 2019-12-01 12:59:09 -08:00
Makefile
mapping_dirty_helpers.c
memblock.c mm: support memblock alloc on the exact node for sparse_buffer_init() 2019-12-01 12:59:08 -08:00
memcontrol.c mm/memcontrol: use vmstat names for printing statistics 2019-12-04 19:44:11 -08:00
memfd.c
memory_hotplug.c mm/memory_hotplug: shrink zones when offlining memory 2020-01-04 13:55:08 -08:00
memory-failure.c mm/memory-failure.c: use page_shift() in add_to_kill() 2019-12-01 12:59:04 -08:00
memory.c mm/memory.c: add apply_to_existing_page_range() helper 2019-12-17 20:59:59 -08:00
mempolicy.c mm/mempolicy.c: fix checking unmapped holes for mbind 2019-12-01 12:59:07 -08:00
mempool.c
memremap.c mm/memory_hotplug: shrink zones when offlining memory 2020-01-04 13:55:08 -08:00
memtest.c
migrate.c mm: move_pages: return valid node id in status if the page is already on the target node 2020-01-04 13:55:09 -08:00
mincore.c
mlock.c
mm_init.c
mmap.c arm64: Revert support for execute-only user mappings 2020-01-06 10:10:07 -08:00
mmu_context.c
mmu_gather.c
mmu_notifier.c hmm related patches for 5.5 2019-11-30 10:33:14 -08:00
mmzone.c
mprotect.c autonuma: reduce cache footprint when scanning page tables 2019-12-01 12:59:09 -08:00
mremap.c mm/mmap.c: use IS_ERR_VALUE to check return value of get_unmapped_area 2019-12-01 06:29:19 -08:00
msync.c
nommu.c mm/mmap.c: rb_parent is not necessary in __vma_link_list() 2019-12-01 06:29:19 -08:00
oom_kill.c mm/oom: fix pgtables units mismatch in Killed process message 2020-01-04 13:55:09 -08:00
page_alloc.c mm: clean up and clarify lruvec lookup procedure 2019-12-01 12:59:06 -08:00
page_counter.c
page_ext.c
page_idle.c
page_io.c mm/page_io.c: annotate refault stalls from swap_readpage 2019-12-01 12:59:11 -08:00
page_isolation.c mm/page_isolation.c: convert SKIP_HWPOISON to MEMORY_OFFLINE 2019-12-01 12:59:04 -08:00
page_owner.c
page_poison.c
page_vma_mapped.c
page-writeback.c
pagewalk.c
percpu-internal.h
percpu-km.c
percpu-stats.c
percpu-vm.c
percpu.c
pgtable-generic.c asm-generic/mm: stub out p{4,u}d_clear_bad() if __PAGETABLE_P{4,U}D_FOLDED 2019-12-01 06:29:19 -08:00
process_vm_access.c
readahead.c
rmap.c mm, thp: do not queue fully unmapped pages for deferred split 2019-12-01 12:59:09 -08:00
rodata_test.c
shmem.c mm/shmem.c: cast the type of unmap_start to u64 2019-12-01 12:59:10 -08:00
shuffle.c
shuffle.h
slab_common.c mm: memcg/slab: wait for !root kmem_cache refcnt killing on root kmem_cache destruction 2019-12-04 19:44:11 -08:00
slab.c mm, slab: remove unused kmalloc_size() 2019-12-01 06:29:17 -08:00
slab.h mm: clean up and clarify lruvec lookup procedure 2019-12-01 12:59:06 -08:00
slob.c
slub.c mm/slub.c: clean up validate_slab() 2019-12-01 06:29:18 -08:00
sparse-vmemmap.c
sparse.c mm: support memblock alloc on the exact node for sparse_buffer_init() 2019-12-01 12:59:08 -08:00
swap_cgroup.c
swap_slots.c
swap_state.c
swap.c mm/swap.c: piggyback lru_add_drain_all() calls 2019-12-01 06:29:19 -08:00
swapfile.c mm, swap: disallow swapon() on zoned block devices 2019-12-01 06:29:18 -08:00
truncate.c
usercopy.c
userfaultfd.c mm: fix typos in comments when calling __SetPageUptodate() 2019-12-01 12:59:10 -08:00
util.c mm/mmap.c: rb_parent is not necessary in __vma_link_list() 2019-12-01 06:29:19 -08:00
vmacache.c
vmalloc.c kasan: don't assume percpu shadow allocations will succeed 2019-12-17 20:59:59 -08:00
vmpressure.c
vmscan.c mm: vmscan: protect shrinker idr replace with CONFIG_MEMCG 2019-12-17 20:59:59 -08:00
vmstat.c mm/memcontrol: use vmstat names for printing statistics 2019-12-04 19:44:11 -08:00
workingset.c mm: vmscan: detect file thrashing at the reclaim root 2019-12-01 12:59:07 -08:00
z3fold.c mm/z3fold.c: add inter-page compaction 2019-12-01 12:59:07 -08:00
zbud.c
zpool.c
zsmalloc.c mm/zsmalloc.c: fix the migrated zspage statistics. 2020-01-04 13:55:09 -08:00
zswap.c