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Mark Rutland 29083fd84d kasan: hw_tags: avoid invalid virt_to_page() 
When booting with 'kasan.vmalloc=off', a kernel configured with support
for KASAN_HW_TAGS will explode at boot time due to bogus use of
virt_to_page() on a vmalloc adddress.  With CONFIG_DEBUG_VIRTUAL selected
this will be reported explicitly, and with or without CONFIG_DEBUG_VIRTUAL
the kernel will dereference a bogus address:

| ------------[ cut here ]------------
| virt_to_phys used for non-linear address: (____ptrval____) (0xffff800008000000)
| WARNING: CPU: 0 PID: 0 at arch/arm64/mm/physaddr.c:15 __virt_to_phys+0x78/0x80
| Modules linked in:
| CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.3.0-rc3-00073-g83865133300d-dirty #4
| Hardware name: linux,dummy-virt (DT)
| pstate: 600000c5 (nZCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
| pc : __virt_to_phys+0x78/0x80
| lr : __virt_to_phys+0x78/0x80
| sp : ffffcd076afd3c80
| x29: ffffcd076afd3c80 x28: 0068000000000f07 x27: ffff800008000000
| x26: fffffbfff0000000 x25: fffffbffff000000 x24: ff00000000000000
| x23: ffffcd076ad3c000 x22: fffffc0000000000 x21: ffff800008000000
| x20: ffff800008004000 x19: ffff800008000000 x18: ffff800008004000
| x17: 666678302820295f x16: ffffffffffffffff x15: 0000000000000004
| x14: ffffcd076b009e88 x13: 0000000000000fff x12: 0000000000000003
| x11: 00000000ffffefff x10: c0000000ffffefff x9 : 0000000000000000
| x8 : 0000000000000000 x7 : 205d303030303030 x6 : 302e30202020205b
| x5 : ffffcd076b41d63f x4 : ffffcd076afd3827 x3 : 0000000000000000
| x2 : 0000000000000000 x1 : ffffcd076afd3a30 x0 : 000000000000004f
| Call trace:
|  __virt_to_phys+0x78/0x80
|  __kasan_unpoison_vmalloc+0xd4/0x478
|  __vmalloc_node_range+0x77c/0x7b8
|  __vmalloc_node+0x54/0x64
|  init_IRQ+0x94/0xc8
|  start_kernel+0x194/0x420
|  __primary_switched+0xbc/0xc4
| ---[ end trace 0000000000000000 ]---
| Unable to handle kernel paging request at virtual address 03fffacbe27b8000
| Mem abort info:
|   ESR = 0x0000000096000004
|   EC = 0x25: DABT (current EL), IL = 32 bits
|   SET = 0, FnV = 0
|   EA = 0, S1PTW = 0
|   FSC = 0x04: level 0 translation fault
| Data abort info:
|   ISV = 0, ISS = 0x00000004
|   CM = 0, WnR = 0
| swapper pgtable: 4k pages, 48-bit VAs, pgdp=0000000041bc5000
| [03fffacbe27b8000] pgd=0000000000000000, p4d=0000000000000000
| Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP
| Modules linked in:
| CPU: 0 PID: 0 Comm: swapper/0 Tainted: G        W          6.3.0-rc3-00073-g83865133300d-dirty #4
| Hardware name: linux,dummy-virt (DT)
| pstate: 200000c5 (nzCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
| pc : __kasan_unpoison_vmalloc+0xe4/0x478
| lr : __kasan_unpoison_vmalloc+0xd4/0x478
| sp : ffffcd076afd3ca0
| x29: ffffcd076afd3ca0 x28: 0068000000000f07 x27: ffff800008000000
| x26: 0000000000000000 x25: 03fffacbe27b8000 x24: ff00000000000000
| x23: ffffcd076ad3c000 x22: fffffc0000000000 x21: ffff800008000000
| x20: ffff800008004000 x19: ffff800008000000 x18: ffff800008004000
| x17: 666678302820295f x16: ffffffffffffffff x15: 0000000000000004
| x14: ffffcd076b009e88 x13: 0000000000000fff x12: 0000000000000001
| x11: 0000800008000000 x10: ffff800008000000 x9 : ffffb2f8dee00000
| x8 : 000ffffb2f8dee00 x7 : 205d303030303030 x6 : 302e30202020205b
| x5 : ffffcd076b41d63f x4 : ffffcd076afd3827 x3 : 0000000000000000
| x2 : 0000000000000000 x1 : ffffcd076afd3a30 x0 : ffffb2f8dee00000
| Call trace:
|  __kasan_unpoison_vmalloc+0xe4/0x478
|  __vmalloc_node_range+0x77c/0x7b8
|  __vmalloc_node+0x54/0x64
|  init_IRQ+0x94/0xc8
|  start_kernel+0x194/0x420
|  __primary_switched+0xbc/0xc4
| Code: d34cfc08 aa1f03fa 8b081b39 d503201f (f9400328)
| ---[ end trace 0000000000000000 ]---
| Kernel panic - not syncing: Attempted to kill the idle task!

This is because init_vmalloc_pages() erroneously calls virt_to_page() on
a vmalloc address, while virt_to_page() is only valid for addresses in
the linear/direct map. Since init_vmalloc_pages() expects virtual
addresses in the vmalloc range, it must use vmalloc_to_page() rather
than virt_to_page().

We call init_vmalloc_pages() from __kasan_unpoison_vmalloc(), where we
check !is_vmalloc_or_module_addr(), suggesting that we might encounter a
non-vmalloc address. Luckily, this never happens. By design, we only
call __kasan_unpoison_vmalloc() on pointers in the vmalloc area, and I
have verified that we don't violate that expectation. Given that,
is_vmalloc_or_module_addr() must always be true for any legitimate
argument to __kasan_unpoison_vmalloc().

Correct init_vmalloc_pages() to use vmalloc_to_page(), and remove the
redundant and misleading use of is_vmalloc_or_module_addr() in
__kasan_unpoison_vmalloc().

Link: https://lkml.kernel.org/r/20230418164212.1775741-1-mark.rutland@arm.com
Fixes: 6c2f761dad7851d8 ("kasan: fix zeroing vmalloc memory with HW_TAGS")
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Marco Elver <elver@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-05-02 17:23:27 -07:00
..
damon
mm/damon/sysfs: make more kobj_type structures constant
2023-04-05 19:42:59 -07:00
kasan
kasan: hw_tags: avoid invalid virt_to_page()
2023-05-02 17:23:27 -07:00
kfence
- Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of
2023-04-27 19:42:02 -07:00
kmsan
printk: export console trace point for kcsan/kasan/kfence/kmsan
2023-04-18 16:30:11 -07:00
backing-dev.c
- Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of
2023-04-27 19:42:02 -07:00
balloon_compaction.c
mm: Convert all PageMovable users to movable_operations
2022-08-02 12:34:03 -04:00
bootmem_info.c
bootmem: remove the vmemmap pages from kmemleak in put_page_bootmem
2022-08-28 14:02:45 -07:00
cma_debug.c
mm/cma_debug: show complete cma name in debugfs directories
2022-09-11 20:25:50 -07:00
cma_sysfs.c
mm: cma: make kobj_type structure constant
2023-03-28 16:20:06 -07:00
cma.c
mm: move most of core MM initialization to mm/mm_init.c
2023-04-05 19:42:52 -07:00
cma.h
mm/cma: provide option to opt out from exposing pages on activation failure
2022-03-22 15:57:09 -07:00
compaction.c
- Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of
2023-04-27 19:42:02 -07:00
debug_page_ref.c
…
debug_vm_pgtable.c
mm, treewide: redefine MAX_ORDER sanely
2023-04-05 19:42:46 -07:00
debug.c
mm/debug: use %pGt to display page_type in dump_page()
2023-03-28 16:20:09 -07:00
dmapool_test.c
dmapool: add alloc/free performance test
2023-04-05 19:42:38 -07:00
dmapool.c
dmapool: create/destroy cleanup
2023-04-05 19:42:41 -07:00
early_ioremap.c
mm/early_ioremap: declare early_memremap_pgprot_adjust()
2022-03-22 15:57:11 -07:00
fadvise.c
mm: support POSIX_FADV_NOREUSE
2023-01-18 17:12:57 -08:00
failslab.c
mm: fix unexpected changes to {failslab|fail_page_alloc}.attr
2022-11-22 18:50:44 -08:00
filemap.c
mm: return an ERR_PTR from __filemap_get_folio
2023-04-05 19:42:42 -07:00
folio-compat.c
- Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of
2023-04-27 19:42:02 -07:00
frontswap.c
frontswap: don't call ->init if no ops are registered
2022-09-26 12:14:34 -07:00
gup_test.c
mm/gup_test: free memory allocated via kvcalloc() using kvfree()
2022-12-15 16:37:48 -08:00
gup_test.h
mm/gup_test: start/stop/read functionality for PIN LONGTERM test
2022-11-08 17:37:15 -08:00
gup.c
Add support for new Linear Address Masking CPU feature. This is similar
2023-04-28 09:43:49 -07:00
highmem.c
highmem: fix kmap_to_page() for kmap_local_page() addresses
2022-10-12 18:51:51 -07:00
hmm.c
mm/hugetlb: make walk_hugetlb_range() safe to pmd unshare
2023-01-18 17:12:39 -08:00
huge_memory.c
mm: don't check VMA write permissions if the PTE/PMD indicates write permissions
2023-04-21 14:52:03 -07:00
hugetlb_cgroup.c
mm/hugetlb: increase use of folios in alloc_huge_page()
2023-02-13 15:54:27 -08:00
hugetlb_vmemmap.c
mm, page_alloc: use check_pages_enabled static key to check tail pages
2023-04-18 16:29:54 -07:00
hugetlb_vmemmap.h
mm: hugetlb_vmemmap: improve hugetlb_vmemmap code readability
2022-08-08 18:06:43 -07:00
hugetlb.c
- Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of
2023-04-27 19:42:02 -07:00
hwpoison-inject.c
mm/hwpoison: add __init/__exit annotations to module init/exit funcs
2022-10-03 14:03:05 -07:00
init-mm.c
mm: add per-VMA lock and helper functions to control it
2023-04-05 20:02:57 -07:00
internal.h
mm: correct arg in reclaim_pages()/reclaim_clean_pages_from_list()
2023-04-21 14:52:02 -07:00
interval_tree.c
…
io-mapping.c
…
ioremap.c
mm: ioremap: Add ioremap/iounmap_allowed()
2022-06-27 12:22:31 +01:00
Kconfig
- Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of
2023-04-27 19:42:02 -07:00
Kconfig.debug
- Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of
2023-04-27 19:42:02 -07:00
khugepaged.c
mm/khugepaged: fix conflicting mods to collapse_file()
2023-04-27 13:42:16 -07:00
kmemleak.c
lib/stackdepot, mm: rename stack_depot_want_early_init
2023-02-16 20:43:49 -08:00
ksm.c
mm: add new KSM process and sysfs knobs
2023-04-21 14:52:03 -07:00
list_lru.c
mm: kmem: make mem_cgroup_from_obj() vmalloc()-safe
2022-06-16 19:48:31 -07:00
maccess.c
mm: Fix copy_from_user_nofault().
2023-04-12 17:36:23 -07:00
madvise.c
Add support for new Linear Address Masking CPU feature. This is similar
2023-04-28 09:43:49 -07:00
Makefile
- Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of
2023-04-27 19:42:02 -07:00
mapping_dirty_helpers.c
mm/mmu_notifier: remove unused mmu_notifier_range_update_to_read_only export
2023-02-02 22:32:54 -08:00
memblock.c
mm: avoid passing 0 to __ffs()
2023-04-18 16:29:42 -07:00
memcontrol.c
memcg: page_cgroup_ino() get memcg from the page's folio
2023-04-18 16:30:09 -07:00
memfd.c
memfd: pass argument of memfd_fcntl as int
2023-04-18 16:30:11 -07:00
memory_hotplug.c
mm: avoid passing 0 to __ffs()
2023-04-18 16:29:42 -07:00
memory-failure.c
- Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of
2023-04-27 19:42:02 -07:00
memory-tiers.c
memory tier: release the new_memtier in find_create_memory_tier()
2023-02-09 16:51:40 -08:00
memory.c
mm: do not increment pgfault stats when page fault handler retries
2023-04-21 14:52:04 -07:00
mempolicy.c
mm/mempolicy: fix use-after-free of VMA iterator
2023-04-16 10:41:25 -07:00
mempool.c
mempool: do not use ksize() for poisoning
2022-11-30 15:58:41 -08:00
memremap.c
mm/memremap.c: fix outdated comment in devm_memremap_pages
2023-02-09 16:51:46 -08:00
memtest.c
mm/memtest: add results of early memtest to /proc/meminfo
2023-04-05 19:42:55 -07:00
migrate_device.c
mm: change to return bool for isolate_lru_page()
2023-02-20 12:46:17 -08:00
migrate.c
Add support for new Linear Address Masking CPU feature. This is similar
2023-04-28 09:43:49 -07:00
mincore.c
mm: return an ERR_PTR from __filemap_get_folio
2023-04-05 19:42:42 -07:00
mlock.c
mm: mlock: use folios_put() in mlock_folio_batch()
2023-04-18 16:29:53 -07:00
mm_init.c
mm/vmemmap/devdax: fix kernel crash when probing devdax devices
2023-04-18 16:30:09 -07:00
mm_slot.h
mm: introduce common struct mm_slot
2022-10-03 14:02:43 -07:00
mmap_lock.c
…
mmap.c
- Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of
2023-04-27 19:42:02 -07:00
mmu_gather.c
mm: prefer xxx_page() alloc/free functions for order-0 pages
2023-03-28 16:20:16 -07:00
mmu_notifier.c
mm/mmu_notifier: remove unused mmu_notifier_range_update_to_read_only export
2023-02-02 22:32:54 -08:00
mmzone.c
mm: multi-gen LRU: groundwork
2022-09-26 19:46:09 -07:00
mprotect.c
mm/userfaultfd: don't consider uffd-wp bit of writable migration entries
2023-04-18 16:29:53 -07:00
mremap.c
mm/mremap: write-lock VMA while remapping it to a new address range
2023-04-05 20:02:58 -07:00
msync.c
mm/msync: use vma_find() instead of vma linked list
2022-09-26 19:46:25 -07:00
nommu.c
mm: vmalloc: convert vread() to vread_iter()
2023-04-05 19:42:57 -07:00
oom_kill.c
mm/mmu_notifier: remove unused mmu_notifier_range_update_to_read_only export
2023-02-02 22:32:54 -08:00
page_alloc.c
mm, page_alloc: use check_pages_enabled static key to check tail pages
2023-04-18 16:29:54 -07:00
page_counter.c
mm: page_counter: remove unneeded atomic ops for low/min
2022-09-11 20:26:01 -07:00
page_ext.c
mm/page_ext: init page_ext early if there are no deferred struct pages
2023-02-02 22:33:22 -08:00
page_idle.c
mm: page_idle: convert page idle to use a folio
2023-01-18 17:12:52 -08:00
page_io.c
- Daniel Verkamp has contributed a memfd series ("mm/memfd: add
2023-02-23 17:09:35 -08:00
page_isolation.c
mm, treewide: redefine MAX_ORDER sanely
2023-04-05 19:42:46 -07:00
page_owner.c
mm, treewide: redefine MAX_ORDER sanely
2023-04-05 19:42:46 -07:00
page_poison.c
…
page_reporting.c
mm, treewide: redefine MAX_ORDER sanely
2023-04-05 19:42:46 -07:00
page_reporting.h
…
page_table_check.c
mm/page_ext: do not allocate space for page_ext->flags if not needed
2023-02-02 22:33:11 -08:00
page_vma_mapped.c
mm/hugetlb: introduce hugetlb_walk()
2023-01-18 17:12:39 -08:00
page-writeback.c
mm,jfs: move write_one_page/folio_write_one to jfs
2023-03-28 16:20:14 -07:00
pagewalk.c
mm/hugetlb: introduce hugetlb_walk()
2023-01-18 17:12:39 -08:00
percpu-internal.h
mm: percpu: fix incorrect size in pcpu_obj_full_size()
2023-02-16 20:43:55 -08:00
percpu-km.c
…
percpu-stats.c
…
percpu-vm.c
…
percpu.c
mm: memcontrol: rename memcg_kmem_enabled()
2023-02-16 20:43:56 -08:00
pgalloc-track.h
…
pgtable-generic.c
mm: add PTE pointer parameter to flush_tlb_fix_spurious_fault()
2023-03-28 16:20:12 -07:00
process_vm_access.c
use less confusing names for iov_iter direction initializers
2022-11-25 13:01:55 -05:00
ptdump.c
mm: pagewalk: Fix race between unmap and page walker
2022-09-03 10:13:13 -07:00
readahead.c
readahead: convert readahead_expand() to use a folio
2023-02-02 22:33:21 -08:00
rmap.c
mm,unmap: avoid flushing TLB in batch if PTE is inaccessible
2023-04-27 13:42:16 -07:00
rodata_test.c
mm/rodata_test: use PAGE_ALIGNED() helper
2022-10-03 14:03:05 -07:00
secretmem.c
- Daniel Verkamp has contributed a memfd series ("mm/memfd: add
2023-02-23 17:09:35 -08:00
shmem.c
- Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of
2023-04-27 19:42:02 -07:00
shrinker_debug.c
mm: shrinkers: fix debugfs file permissions
2023-04-21 14:52:03 -07:00
shuffle.c
mm/shuffle: convert module_param_call to module_param_cb
2022-10-03 14:03:07 -07:00
shuffle.h
mm, treewide: redefine MAX_ORDER sanely
2023-04-05 19:42:46 -07:00
slab_common.c
mm/slab: document kfree() as allowed for kmem_cache_alloc() objects
2023-03-29 10:35:41 +02:00
slab.c
mm: vmscan: refactor updating current->reclaim_state
2023-04-18 16:30:10 -07:00
slab.h
- Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of
2023-04-27 19:42:02 -07:00
slub.c
- Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of
2023-04-27 19:42:02 -07:00
sparse-vmemmap.c
mm/vmemmap/devdax: fix kernel crash when probing devdax devices
2023-04-18 16:30:09 -07:00
sparse.c
sparse: remove unnecessary 0 values from rc
2023-04-21 14:52:05 -07:00
swap_cgroup.c
mm: memcontrol: don't allocate cgroup swap arrays when memcg is disabled
2022-10-03 14:03:36 -07:00
swap_slots.c
mm/swap: convert put_swap_page() to put_swap_folio()
2022-10-03 14:02:46 -07:00
swap_state.c
mm: return an ERR_PTR from __filemap_get_folio
2023-04-05 19:42:42 -07:00
swap.c
mm: swap: fix performance regression on sparsetruncate-tiny
2023-04-16 10:41:24 -07:00
swap.h
mm: remove the __swap_writepage return value
2023-02-02 22:33:33 -08:00
swapfile.c
sync mm-stable with mm-hotfixes-stable to pick up depended-upon upstream changes
2023-04-16 12:31:58 -07:00
truncate.c
mm: return an ERR_PTR from __filemap_get_folio
2023-04-05 19:42:42 -07:00
usercopy.c
mm: Fix copy_from_user_nofault().
2023-04-12 17:36:23 -07:00
userfaultfd.c
userfaultfd: use helper function range_in_vma()
2023-04-21 14:52:02 -07:00
util.c
mm: uninline kstrdup()
2023-04-08 13:45:37 -07:00
vmalloc.c
mm: vmalloc: rename addr_to_vb_xarray() function
2023-04-18 16:29:48 -07:00
vmpressure.c
…
vmscan.c
- Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of
2023-04-27 19:42:02 -07:00
vmstat.c
mm: introduce per-VMA lock statistics
2023-04-05 20:03:01 -07:00
workingset.c
mm: workingset: update description of the source file
2023-04-18 16:30:11 -07:00
z3fold.c
mm: remove PageMovable export
2023-01-18 17:12:57 -08:00
zbud.c
zpool: clean out dead code
2022-12-11 18:12:10 -08:00
zpool.c
zpool: remove MODULE_LICENSE in non-modules
2023-04-13 13:13:54 -07:00
zsmalloc.c
zsmalloc: allow only one active pool compaction context
2023-04-21 14:52:04 -07:00
zswap.c
- Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of
2023-04-27 19:42:02 -07:00