Juergen Gross 895f7b8e90 mm: don't defer struct page initialization for Xen pv guests ... Commit f7f99100d8 ("mm: stop zeroing memory during allocation in vmemmap") broke Xen pv domains in some configurations, as the "Pinned" information in struct page of early page tables could get lost. This will lead to the kernel trying to write directly into the page tables instead of asking the hypervisor to do so. The result is a crash like the following: BUG: unable to handle kernel paging request at ffff8801ead19008 IP: xen_set_pud+0x4e/0xd0 PGD 1c0a067 P4D 1c0a067 PUD 23a0067 PMD 1e9de0067 PTE 80100001ead19065 Oops: 0003 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.14.0-default+ #271 Hardware name: Dell Inc. Latitude E6440/0159N7, BIOS A07 06/26/2014 task: ffffffff81c10480 task.stack: ffffffff81c00000 RIP: e030:xen_set_pud+0x4e/0xd0 Call Trace: __pmd_alloc+0x128/0x140 ioremap_page_range+0x3f4/0x410 __ioremap_caller+0x1c3/0x2e0 acpi_os_map_iomem+0x175/0x1b0 acpi_tb_acquire_table+0x39/0x66 acpi_tb_validate_table+0x44/0x7c acpi_tb_verify_temp_table+0x45/0x304 acpi_reallocate_root_table+0x12d/0x141 acpi_early_init+0x4d/0x10a start_kernel+0x3eb/0x4a1 xen_start_kernel+0x528/0x532 Code: 48 01 e8 48 0f 42 15 a2 fd be 00 48 01 d0 48 ba 00 00 00 00 00 ea ff ff 48 c1 e8 0c 48 c1 e0 06 48 01 d0 48 8b 00 f6 c4 02 75 5d <4c> 89 65 00 5b 5d 41 5c c3 65 8b 05 52 9f fe 7e 89 c0 48 0f a3 RIP: xen_set_pud+0x4e/0xd0 RSP: ffffffff81c03cd8 CR2: ffff8801ead19008 ---[ end trace 38eca2e56f1b642e ]--- Avoid this problem by not deferring struct page initialization when running as Xen pv guest. Pavel said: : This is unique for Xen, so this particular issue won't effect other : configurations. I am going to investigate if there is a way to : re-enable deferred page initialization on xen guests. [akpm@linux-foundation.org: explicitly include xen.h] Link: http://lkml.kernel.org/r/20180216154101.22865-1-jgross@suse.com Fixes: f7f99100d8 ("mm: stop zeroing memory during allocation in vmemmap") Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Pavel Tatashin <pasha.tatashin@oracle.com> Cc: Steven Sistare <steven.sistare@oracle.com> Cc: Daniel Jordan <daniel.m.jordan@oracle.com> Cc: Bob Picco <bob.picco@oracle.com> Cc: <stable@vger.kernel.org> [4.15.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2018-02-21 15:35:43 -08:00
..
kasan	kasan: fix prototype author email address	2018-02-06 18:32:43 -08:00
backing-dev.c	Revert "bdi: add error handle for bdi_debug_register"	2017-12-21 10:01:30 -07:00
balloon_compaction.c	virtio_balloon: fix deadlock on OOM	2017-11-14 23:57:38 +02:00
bootmem.c	mm: docs: fix parameter names mismatch	2018-02-06 18:32:48 -08:00
cleancache.c	fs: switch ->s_uuid to uuid_t	2017-06-05 16:59:12 +02:00
cma_debug.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
cma.c	mm/cma.c: change pr_info to pr_err for cma_alloc fail log	2017-11-15 18:21:03 -08:00
cma.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
compaction.c	mm/compaction.c: fix comment for try_to_compact_pages()	2018-01-31 17:18:39 -08:00
debug_page_ref.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
debug.c	mm/debug.c: provide useful debugging information for VM_BUG	2018-01-04 16:45:09 -08:00
dmapool.c	lib/vsprintf.c: remove %Z support	2017-02-27 18:43:47 -08:00
early_ioremap.c	mm/early_ioremap: Fix boot hang with earlyprintk=efi,keep	2017-12-11 14:54:44 +01:00
fadvise.c	mm/fadvise: discard partial page if endbyte is also EOF	2018-01-31 17:18:39 -08:00
failslab.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
filemap.c	mm/filemap.c: remove include of hardirq.h	2018-01-31 17:18:36 -08:00
frame_vector.c	mm/frame_vector.c: release a semaphore in 'get_vaddr_frames()'	2017-12-14 16:00:48 -08:00
frontswap.c
gup_benchmark.c	mm: add infrastructure for get_user_pages_fast() benchmarking	2017-11-17 16:10:04 -08:00
gup.c	libnvdimm for 4.16	2018-02-06 10:41:33 -08:00
highmem.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
hmm.c	libnvdimm for 4.16	2018-02-06 10:41:33 -08:00
huge_memory.c	mm/thp: remove pmd_huge_split_prepare()	2018-01-31 17:18:38 -08:00
hugetlb_cgroup.c
hugetlb.c	hugetlb, mbind: fall back to default policy if vma is NULL	2018-01-31 17:18:40 -08:00
hwpoison-inject.c	mm/memory_failure: Remove unused trapno from memory_failure	2018-01-23 12:17:42 -06:00
init-mm.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
internal.h	Revert "mm, thp: Do not make pmd/pud dirty without a reason"	2017-11-29 09:01:01 -08:00
interval_tree.c	mm/interval_tree.c: use vma_pages() helper	2018-01-31 17:18:37 -08:00
Kconfig	mm: relax deferred struct page requirements	2018-01-31 17:18:36 -08:00
Kconfig.debug	kmemcheck: rip it out	2017-11-15 18:21:05 -08:00
khugepaged.c	mm: thp: use down_read_trylock() in khugepaged to avoid long block	2018-01-31 17:18:38 -08:00
kmemleak-test.c
kmemleak.c	mm: kmemleak: remove unused hardirq.h	2018-01-31 17:18:36 -08:00
ksm.c	mm: docs: fixup punctuation	2018-02-06 18:32:48 -08:00
list_lru.c	mm/list_lru.c: mark expected switch fall-through	2017-11-15 18:21:07 -08:00
maccess.c	mm: docs: fix parameter names mismatch	2018-02-06 18:32:48 -08:00
madvise.c	mm/memory_failure: Remove unused trapno from memory_failure	2018-01-23 12:17:42 -06:00
Makefile	mm: add infrastructure for get_user_pages_fast() benchmarking	2017-11-17 16:10:04 -08:00
memblock.c	mm/memblock: memblock_is_map/region_memory can be boolean	2018-02-06 18:32:47 -08:00
memcontrol.c	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
memory_hotplug.c	libnvdimm for 4.16	2018-02-06 10:41:33 -08:00
memory-failure.c	x86/mm, mm/hwpoison: Don't unconditionally unmap kernel 1:1 pages	2018-02-13 16:25:06 +01:00
memory.c	mm: hide a #warning for COMPILE_TEST	2018-02-16 09:41:36 -08:00
mempolicy.c	hugetlb, mbind: fall back to default policy if vma is NULL	2018-01-31 17:18:40 -08:00
mempool.c	kasan: detect invalid frees for large mempool objects	2018-02-06 18:32:43 -08:00
memtest.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
migrate.c	mm, hugetlb: do not rely on overcommit limit during migration	2018-01-31 17:18:40 -08:00
mincore.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
mlock.c	mm, mlock, vmscan: no more skipping pagevecs	2018-02-21 15:35:42 -08:00
mm_init.c
mmap.c	mm, oom_reaper: fix memory corruption	2017-12-14 16:00:49 -08:00
mmu_context.c	sched/headers: Prepare to move the task_lock()/unlock() APIs to <linux/sched/task.h>	2017-03-02 08:42:38 +01:00
mmu_notifier.c	mm, mmu_notifier: annotate mmu notifiers with blockable invalidate callbacks	2018-01-31 17:18:38 -08:00
mmzone.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
mprotect.c	mm: numa: do not trap faults on shared data section pages.	2018-01-31 17:18:40 -08:00
mremap.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
msync.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
nobootmem.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
nommu.c	mm: docs: fixup punctuation	2018-02-06 18:32:48 -08:00
oom_kill.c	mm, oom: avoid reaping only for mm's with blockable invalidate callbacks	2018-01-31 17:18:38 -08:00
page_alloc.c	mm: don't defer struct page initialization for Xen pv guests	2018-02-21 15:35:43 -08:00
page_counter.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
page_ext.c	mm/page_ext.c: make page_ext_init a noop when CONFIG_PAGE_EXTENSION but nothing uses it	2018-01-31 17:18:39 -08:00
page_idle.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
page_io.c	block: convert to bio_first_bvec_all & bio_first_page_all	2018-01-06 09:18:00 -07:00
page_isolation.c	mm: distinguish CMA and MOVABLE isolation in has_unmovable_pages()	2017-11-15 18:21:02 -08:00
page_owner.c	mm/page_owner.c: clean up init_pages_in_zone()	2018-01-31 17:18:39 -08:00
page_poison.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
page_vma_mapped.c	mm, page_vma_mapped: Introduce pfn_in_hpage()	2018-01-22 12:15:57 -08:00
page-writeback.c	Revert "mm/page-writeback.c: print a warning if the vm dirtiness settings are illogical"	2017-11-29 18:40:43 -08:00
pagewalk.c	mm: docs: add blank lines to silence sphinx "Unexpected indentation" errors	2018-02-06 18:32:48 -08:00
percpu-internal.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
percpu-km.c	percpu: replace area map allocator with bitmap	2017-07-26 17:41:05 -04:00
percpu-stats.c	percpu: fix starting offset for chunk statistics traversal	2017-09-27 14:45:57 -07:00
percpu-vm.c	mm: remove __GFP_COLD	2017-11-15 18:21:06 -08:00
percpu.c	percpu: hack to let the CRIS architecture to boot until they clean up	2017-11-27 12:53:12 -08:00
pgtable-generic.c	mm: do not lose dirty and accessed bits in pmdp_invalidate()	2018-01-31 17:18:38 -08:00
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	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
readahead.c
rmap.c	mm: remove cold parameter from free_hot_cold_page*	2017-11-15 18:21:06 -08:00
rodata_test.c	mm: fix RODATA_TEST failure "rodata_test: test data was not read only"	2017-10-03 17:54:24 -07:00
shmem.c	shmem: add sealing support to hugetlb-backed memfd	2018-01-31 17:18:39 -08:00
slab_common.c	Currently, hardened usercopy performs dynamic bounds checking on slab	2018-02-03 16:25:42 -08:00
slab.c	kasan: don't use __builtin_return_address(1)	2018-02-06 18:32:43 -08:00
slab.h	Currently, hardened usercopy performs dynamic bounds checking on slab	2018-02-03 16:25:42 -08:00
slob.c	slab, slub, slob: add slab_flags_t	2017-11-15 18:21:01 -08:00
slub.c	kasan: don't use __builtin_return_address(1)	2018-02-06 18:32:43 -08:00
sparse-vmemmap.c	mm: merge vmem_altmap_alloc into altmap_alloc_block_buf	2018-01-08 11:46:23 -08:00
sparse.c	libnvdimm for 4.16	2018-02-06 10:41:33 -08:00
swap_cgroup.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
swap_slots.c	mm/swap_slots.c: fix race conditions in swap_slots cache init	2017-11-15 18:21:03 -08:00
swap_state.c	mm: remove cold parameter for release_pages	2017-11-15 18:21:06 -08:00
swap.c	mm/swap.c: make functions and their kernel-doc agree (again)	2018-02-21 15:35:43 -08:00
swapfile.c	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
truncate.c	mm: add unmap_mapping_pages()	2018-01-31 17:18:37 -08:00
usercopy.c	usercopy: WARN() on slab cache usercopy region violations	2018-01-15 12:07:48 -08:00
userfaultfd.c	mm/userfaultfd.c: remove duplicate include	2018-02-06 18:32:47 -08:00
util.c	new primitive: vmemdup_user()	2018-01-07 13:06:15 -05:00
vmacache.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
vmalloc.c	vmalloc: fix __GFP_HIGHMEM usage for vmalloc_32 on 32b systems	2018-02-21 15:35:43 -08:00
vmpressure.c	mm, vmpressure: pass-through notification support	2017-07-10 16:32:31 -07:00
vmscan.c	mm, mlock, vmscan: no more skipping pagevecs	2018-02-21 15:35:42 -08:00
vmstat.c	mm, sysctl: make NUMA stats configurable	2017-11-15 18:21:07 -08:00
workingset.c	mm, truncate: do not check mapping for every page being truncated	2017-11-15 18:21:06 -08:00
z3fold.c	mm: docs: fix parameter names mismatch	2018-02-06 18:32:48 -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	zsmalloc: use U suffix for negative literals being shifted	2018-01-31 17:18:39 -08:00
zswap.c	mm, swap, frontswap: fix THP swap if frontswap enabled	2018-02-21 15:35:43 -08:00