linux_dsm_epyc7002/mm
Dave Hansen 316d097c4c x86/pti: Filter at vma->vm_page_prot population
commit ce9962bf7e22bb3891655c349faff618922d4a73

0day reported warnings at boot on 32-bit systems without NX support:

attempted to set unsupported pgprot: 8000000000000025 bits: 8000000000000000 supported: 7fffffffffffffff
WARNING: CPU: 0 PID: 1 at
arch/x86/include/asm/pgtable.h:540 handle_mm_fault+0xfc1/0xfe0:
 check_pgprot at arch/x86/include/asm/pgtable.h:535
 (inlined by) pfn_pte at arch/x86/include/asm/pgtable.h:549
 (inlined by) do_anonymous_page at mm/memory.c:3169
 (inlined by) handle_pte_fault at mm/memory.c:3961
 (inlined by) __handle_mm_fault at mm/memory.c:4087
 (inlined by) handle_mm_fault at mm/memory.c:4124

The problem is that due to the recent commit which removed auto-massaging
of page protections, filtering page permissions at PTE creation time is not
longer done, so vma->vm_page_prot is passed unfiltered to PTE creation.

Filter the page protections before they are installed in vma->vm_page_prot.

Fixes: fb43d6cb91 ("x86/mm: Do not auto-massage page protections")
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Ingo Molnar <mingo@kernel.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Kees Cook <keescook@google.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: linux-mm@kvack.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Nadav Amit <namit@vmware.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Link: https://lkml.kernel.org/r/20180420222028.99D72858@viggo.jf.intel.com
2018-04-25 11:02:51 +02:00
..
kasan
backing-dev.c mm/vmscan: don't mess with pgdat->flags in memcg reclaim 2018-04-11 10:28:30 -07:00
balloon_compaction.c
bootmem.c
cleancache.c
cma_debug.c
cma.c mm/cma: manage the memory of the CMA area by using the ZONE_MOVABLE 2018-04-11 10:28:32 -07:00
cma.h
compaction.c mm/cma: remove ALLOC_CMA 2018-04-11 10:28:32 -07:00
debug_page_ref.c
debug.c
dmapool.c
early_ioremap.c
fadvise.c
failslab.c
filemap.c mm/filemap.c: fix NULL pointer in page_cache_tree_insert() 2018-04-20 17:18:36 -07:00
frame_vector.c
frontswap.c
gup_benchmark.c mm/gup_benchmark: handle gup failures 2018-04-13 17:10:27 -07:00
gup.c mm/gup.c: document return value 2018-04-13 17:10:27 -07:00
highmem.c
hmm.c mm/hmm.c: remove superfluous RCU protection around radix tree lookup 2018-04-11 10:28:31 -07:00
huge_memory.c mm: enable thp migration for shmem thp 2018-04-20 17:18:35 -07:00
hugetlb_cgroup.c
hugetlb.c
hwpoison-inject.c
init-mm.c
internal.h mm/cma: remove ALLOC_CMA 2018-04-11 10:28:32 -07:00
interval_tree.c
Kconfig
Kconfig.debug
khugepaged.c page cache: use xa_lock 2018-04-11 10:28:39 -07:00
kmemleak-test.c
kmemleak.c
ksm.c mm/ksm.c: fix inconsistent accounting of zero pages 2018-04-11 10:28:31 -07:00
list_lru.c
maccess.c
madvise.c
Makefile
memblock.c
memcontrol.c mm: memcg: add __GFP_NOWARN in __memcg_schedule_kmem_cache_create() 2018-04-20 17:18:36 -07:00
memory_hotplug.c mm: unclutter THP migration 2018-04-11 10:28:32 -07:00
memory-failure.c mm, migrate: remove reason argument from new_page_t 2018-04-11 10:28:32 -07:00
memory.c
mempolicy.c mm: unclutter THP migration 2018-04-11 10:28:32 -07:00
mempool.c
memtest.c
migrate.c mm: enable thp migration for shmem thp 2018-04-20 17:18:35 -07:00
mincore.c
mlock.c
mm_init.c
mmap.c x86/pti: Filter at vma->vm_page_prot population 2018-04-25 11:02:51 +02:00
mmu_context.c
mmu_notifier.c
mmzone.c
mprotect.c sched/numa: avoid trapping faults and attempting migration of file-backed dirty pages 2018-04-11 10:28:31 -07:00
mremap.c
msync.c
nobootmem.c
nommu.c
oom_kill.c
page_alloc.c xen, mm: allow deferred page initialization for xen pv domains 2018-04-11 10:28:38 -07:00
page_counter.c
page_ext.c
page_idle.c
page_io.c
page_isolation.c mm, migrate: remove reason argument from new_page_t 2018-04-11 10:28:32 -07:00
page_owner.c
page_poison.c
page_vma_mapped.c
page-writeback.c writeback: safer lock nesting 2018-04-20 17:18:35 -07:00
pagewalk.c
percpu-internal.h
percpu-km.c
percpu-stats.c
percpu-vm.c
percpu.c
pgtable-generic.c
process_vm_access.c
quicklist.c
readahead.c page cache: use xa_lock 2018-04-11 10:28:39 -07:00
rmap.c mm: enable thp migration for shmem thp 2018-04-20 17:18:35 -07:00
rodata_test.c
shmem.c page cache: use xa_lock 2018-04-11 10:28:39 -07:00
slab_common.c
slab.c mm, slab: reschedule cache_reap() on the same CPU 2018-04-13 17:10:27 -07:00
slab.h
slob.c
slub.c kasan, slub: fix handling of kasan_slab_free hook 2018-04-11 10:28:32 -07:00
sparse-vmemmap.c
sparse.c
swap_cgroup.c
swap_slots.c
swap_state.c page cache: use xa_lock 2018-04-11 10:28:39 -07:00
swap.c
swapfile.c mm/swapfile.c: make pointer swap_avail_heads static 2018-04-11 10:28:32 -07:00
truncate.c page cache: use xa_lock 2018-04-11 10:28:39 -07:00
usercopy.c
userfaultfd.c
util.c mm/gup.c: document return value 2018-04-13 17:10:27 -07:00
vmacache.c
vmalloc.c
vmpressure.c
vmscan.c mm,vmscan: Allow preallocating memory for register_shrinker(). 2018-04-16 02:06:47 -04:00
vmstat.c mm: introduce NR_INDIRECTLY_RECLAIMABLE_BYTES 2018-04-11 10:28:29 -07:00
workingset.c page cache: use xa_lock 2018-04-11 10:28:39 -07:00
z3fold.c mm/z3fold.c: use gfpflags_allow_blocking 2018-04-11 10:28:31 -07:00
zbud.c
zpool.c
zsmalloc.c
zswap.c