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Peter Zijlstra 57b78a62e7 x86/uaccess, kasan: Fix KASAN vs SMAP 
KASAN inserts extra code for every LOAD/STORE emitted by te compiler.
Much of this code is simple and safe to run with AC=1, however the
kasan_report() function, called on error, is most certainly not safe
to call with AC=1.

Therefore wrap kasan_report() in user_access_{save,restore}; which for
x86 SMAP, saves/restores EFLAGS and clears AC before calling the real
function.

Also ensure all the functions are without __fentry__ hook. The
function tracer is also not safe.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-04-03 11:02:24 +02:00
..
kasan
x86/uaccess, kasan: Fix KASAN vs SMAP
2019-04-03 11:02:24 +02:00
backing-dev.c
writeback: synchronize sync(2) against cgroup writeback membership switches
2019-01-22 14:39:38 -07:00
balloon_compaction.c
…
cleancache.c
mm: use octal not symbolic permissions
2018-06-15 07:55:25 +09:00
cma_debug.c
mm/cma_debug.c: remove static scoped cma_debugfs_root
2019-03-05 21:07:20 -08:00
cma.c
memblock: emphasize that memblock_alloc_range() returns a physical address
2019-03-12 10:04:01 -07:00
cma.h
…
compaction.c
mm/compaction: pass pgdat to too_many_isolated() instead of zone
2019-03-05 21:07:21 -08:00
debug_page_ref.c
…
debug.c
mm/debug.c: fix __dump_page when mapping->host is not set
2019-03-29 10:01:37 -07:00
dmapool.c
docs/core-api/mm: fix return value descriptions in mm/
2019-03-05 21:07:20 -08:00
early_ioremap.c
…
fadvise.c
vfs: implement readahead(2) using POSIX_FADV_WILLNEED
2018-08-30 20:01:32 +02:00
failslab.c
mm: no need to check return value of debugfs_create functions
2019-03-05 21:07:17 -08:00
filemap.c
filemap: add a comment about FAULT_FLAG_RETRY_NOWAIT behavior
2019-03-15 11:26:07 -07:00
frame_vector.c
…
frontswap.c
mm: use octal not symbolic permissions
2018-06-15 07:55:25 +09:00
gup_benchmark.c
mm: no need to check return value of debugfs_create functions
2019-03-05 21:07:17 -08:00
gup.c
Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2019-03-07 17:43:58 -08:00
highmem.c
mm: convert totalram_pages and totalhigh_pages variables to atomic
2018-12-28 12:11:47 -08:00
hmm.c
mm/hmm: convert to use vm_fault_t
2019-03-12 10:04:00 -07:00
huge_memory.c
mm/huge_memory.c: fix "orig_pud" set but not used
2019-03-05 21:07:21 -08:00
hugetlb_cgroup.c
mm: rename page_counter's count/limit into usage/max
2018-06-07 17:34:35 -07:00
hugetlb.c
mm: update get_user_pages_longterm to migrate pages allocated from CMA region
2019-03-05 21:07:19 -08:00
hwpoison-inject.c
…
init-mm.c
mm: Allocate the mm_cpumask (mm->cpu_bitmap[]) dynamically based on nr_cpu_ids
2018-07-17 09:35:30 +02:00
internal.h
mm, compaction: capture a page under direct compaction
2019-03-05 21:07:17 -08:00
interval_tree.c
mm/interval_tree.c: use vma_pages() helper
2018-01-31 17:18:37 -08:00
Kconfig
ksm: replace jhash2 with xxhash
2018-12-28 12:11:46 -08:00
Kconfig.debug
mm/page_owner: move config option to mm/Kconfig.debug
2019-03-05 21:07:18 -08:00
khugepaged.c
mm: memcontrol: expose THP events on a per-memcg basis
2019-03-05 21:07:19 -08:00
kmemleak-test.c
…
kmemleak.c
kmemleak: account for tagged pointers when calculating pointer range
2019-02-21 09:01:00 -08:00
ksm.c
mm: ksm: do not block on page lock when searching stable tree
2019-03-05 21:07:19 -08:00
list_lru.c
numa: make "nr_node_ids" unsigned int
2019-03-05 21:07:19 -08:00
maccess.c
Revert "x86/fault: BUG() when uaccess helpers fault on kernel addresses"
2019-02-25 09:10:51 -08:00
madvise.c
mm/mmu_notifier: use structure for invalidate_range_start/end calls v2
2018-12-28 12:11:50 -08:00
Makefile
mm: remove nobootmem
2018-10-31 08:54:16 -07:00
memblock.c
mm: memblock: update comments and kernel-doc
2019-03-12 10:04:02 -07:00
memcontrol.c
mm/memcontrol.c: fix bad line in comment
2019-03-05 21:07:21 -08:00
memfd.c
mm/memfd: add an F_SEAL_FUTURE_WRITE seal to memfd
2019-03-05 21:07:19 -08:00
memory_hotplug.c
mm/memory_hotplug.c: fix notification in offline error path
2019-03-29 10:01:37 -07:00
memory-failure.c
mm: hwpoison: fix thp split handing in soft_offline_in_use_page()
2019-03-05 21:07:13 -08:00
memory.c
mm/memory.c: fix modifying of page protection by insert_pfn()
2019-03-29 10:01:37 -07:00
mempolicy.c
mm: mempolicy: make mbind() return -EIO when MPOL_MF_STRICT is specified
2019-03-29 10:01:37 -07:00
mempool.c
docs/core-api/mm: fix return value descriptions in mm/
2019-03-05 21:07:20 -08:00
memtest.c
…
migrate.c
mm/migrate.c: add missing flush_dcache_page for non-mapped page migrate
2019-03-29 10:01:37 -07:00
mincore.c
Revert "Change mincore() to count "mapped" pages rather than "cached" pages"
2019-01-24 09:04:37 +13:00
mlock.c
mm: remove zone_lru_lock() function, access ->lru_lock directly
2019-03-05 21:07:21 -08:00
mm_init.c
mm: convert totalram_pages and totalhigh_pages variables to atomic
2018-12-28 12:11:47 -08:00
mmap.c
mm: fix some typos in mm directory
2019-03-05 21:07:18 -08:00
mmu_context.c
…
mmu_gather.c
mm: Replace call_rcu_sched() with call_rcu()
2018-11-27 09:21:46 -08:00
mmu_notifier.c
mm/mmu_notifier: use structure for invalidate_range_start/end calls v2
2018-12-28 12:11:50 -08:00
mmzone.c
…
mprotect.c
mm: update ptep_modify_prot_commit to take old pte value as arg
2019-03-05 21:07:18 -08:00
mremap.c
mm,mremap: bail out earlier in mremap_to under map pressure
2019-03-05 21:07:21 -08:00
msync.c
…
nommu.c
mm/gup: cache dev_pagemap while pinning pages
2018-10-26 16:38:15 -07:00
oom_kill.c
mm,oom: don't kill global init via memory.oom.group
2019-03-05 21:07:19 -08:00
page_alloc.c
mm/hotplug: fix offline undo_isolate_page_range()
2019-03-29 10:01:37 -07:00
page_counter.c
memcg: introduce memory.min
2018-06-07 17:34:36 -07:00
page_ext.c
memblock: drop memblock_alloc_*_nopanic() variants
2019-03-12 10:04:02 -07:00
page_idle.c
mm: remove zone_lru_lock() function, access ->lru_lock directly
2019-03-05 21:07:21 -08:00
page_io.c
mm/page_io.c: fix polled swap page in
2019-01-04 13:13:48 -08:00
page_isolation.c
mm/page_isolation.c: fix a wrong flag in set_migratetype_isolate()
2019-03-29 10:01:37 -07:00
page_owner.c
mm: no need to check return value of debugfs_create functions
2019-03-05 21:07:17 -08:00
page_poison.c
page_poison: play nicely with KASAN
2019-03-05 21:07:13 -08:00
page_vma_mapped.c
mm/rmap: map_pte() was not handling private ZONE_DEVICE page properly
2018-10-31 08:54:11 -07:00
page-writeback.c
docs/core-api/mm: fix return value descriptions in mm/
2019-03-05 21:07:20 -08:00
pagewalk.c
mm: kernel-doc: add missing parameter descriptions
2018-04-05 21:36:27 -07:00
percpu-internal.h
…
percpu-km.c
percpu: km: no need to consider pcpu_group_offsets[0]
2019-02-26 13:47:58 -08:00
percpu-stats.c
treewide: Use array_size() in vmalloc()
2018-06-12 16:19:22 -07:00
percpu-vm.c
percpu: allow select gfp to be passed to underlying allocators
2018-02-18 05:33:01 -08:00
percpu.c
memblock: drop memblock_alloc_*_nopanic() variants
2019-03-12 10:04:02 -07:00
pgtable-generic.c
x86/mm: Page size aware flush_tlb_mm_range()
2018-10-09 16:51:11 +02:00
process_vm_access.c
mm: docs: add blank lines to silence sphinx "Unexpected indentation" errors
2018-02-06 18:32:48 -08:00
quicklist.c
…
readahead.c
docs/core-api/mm: fix return value descriptions in mm/
2019-03-05 21:07:20 -08:00
rmap.c
mm: remove zone_lru_lock() function, access ->lru_lock directly
2019-03-05 21:07:21 -08:00
rodata_test.c
…
shmem.c
mm/memfd: add an F_SEAL_FUTURE_WRITE seal to memfd
2019-03-05 21:07:19 -08:00
slab_common.c
mm: add support for kmem caches in DMA32 zone
2019-03-29 10:01:37 -07:00
slab.c
mm: add support for kmem caches in DMA32 zone
2019-03-29 10:01:37 -07:00
slab.h
mm: add support for kmem caches in DMA32 zone
2019-03-29 10:01:37 -07:00
slob.c
slab: __GFP_ZERO is incompatible with a constructor
2018-06-07 17:34:34 -07:00
slub.c
mm: add support for kmem caches in DMA32 zone
2019-03-29 10:01:37 -07:00
sparse-vmemmap.c
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
sparse.c
mm/hotplug: fix offline undo_isolate_page_range()
2019-03-29 10:01:37 -07:00
swap_cgroup.c
…
swap_slots.c
mm, swap, get_swap_pages: use entry_size instead of cluster in parameter
2018-08-22 10:52:44 -07:00
swap_state.c
mm: swap: add comment for swap_vma_readahead
2019-03-05 21:07:16 -08:00
swap.c
mm: remove zone_lru_lock() function, access ->lru_lock directly
2019-03-05 21:07:21 -08:00
swapfile.c
mm/swapfile.c: use struct_size() in kvzalloc()
2019-03-05 21:07:21 -08:00
truncate.c
docs/core-api/mm: fix return value descriptions in mm/
2019-03-05 21:07:20 -08:00
usercopy.c
mm/usercopy.c: no check page span for stack objects
2019-01-08 17:15:11 -08:00
userfaultfd.c
hugetlbfs: revert "use i_mmap_rwsem for more pmd sharing synchronization"
2019-01-08 17:15:11 -08:00
util.c
docs/core-api/mm: fix return value descriptions in mm/
2019-03-05 21:07:20 -08:00
vmacache.c
mm: get rid of vmacache_flush_all() entirely
2018-09-13 15:18:04 -10:00
vmalloc.c
docs/core-api/mm: fix return value descriptions in mm/
2019-03-05 21:07:20 -08:00
vmpressure.c
mm/vmpressure.c: convert to use match_string() helper
2018-06-07 17:34:36 -07:00
vmscan.c
mm: remove zone_lru_lock() function, access ->lru_lock directly
2019-03-05 21:07:21 -08:00
vmstat.c
mm: no need to check return value of debugfs_create functions
2019-03-05 21:07:17 -08:00
workingset.c
mm/workingset: remove unused @mapping argument in workingset_eviction()
2019-03-05 21:07:21 -08:00
z3fold.c
z3fold: fix possible reclaim races
2018-11-18 10:15:09 -08:00
zbud.c
mm: docs: fix parameter names mismatch
2018-02-06 18:32:48 -08:00
zpool.c
mm/zpool.c: zpool_evictable: fix mismatch in parameter name and kernel-doc
2018-02-21 15:35:43 -08:00
zsmalloc.c
mm/zsmalloc.c: fix fall-through annotation
2018-10-26 16:26:35 -07:00
zswap.c
mm: convert totalram_pages and totalhigh_pages variables to atomic
2018-12-28 12:11:47 -08:00