David Hildenbrand f8b09a0436 mm/memory_hotplug: fix updating the node span ... commit 656d571193 upstream. We recently started updating the node span based on the zone span to avoid touching uninitialized memmaps. Currently, we will always detect the node span to start at 0, meaning a node can easily span too many pages. pgdat_is_empty() will still work correctly if all zones span no pages. We should skip over all zones without spanned pages and properly handle the first detected zone that spans pages. Unfortunately, in contrast to the zone span (/proc/zoneinfo), the node span cannot easily be inspected and tested. The node span gives no real guarantees when an architecture supports memory hotplug, meaning it can easily contain holes or span pages of different nodes. The node span is not really used after init on architectures that support memory hotplug. E.g., we use it in mm/memory_hotplug.c:try_offline_node() and in mm/kmemleak.c:kmemleak_scan(). These users seem to be fine. Link: http://lkml.kernel.org/r/20191027222714.5313-1-david@redhat.com Fixes: 00d6c019b5 ("mm/memory_hotplug: don't access uninitialized memmaps in shrink_pgdat_span()") Signed-off-by: David Hildenbrand <david@redhat.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Oscar Salvador <osalvador@suse.de> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Pavel Tatashin <pasha.tatashin@soleen.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2019-11-24 08:19:13 +01:00
..
kasan	kernel/memremap, kasan: make ZONE_DEVICE with work with KASAN	2018-08-17 16:20:30 -07:00
backing-dev.c	writeback: synchronize sync(2) against cgroup writeback membership switches	2019-03-05 17:58:50 +01:00
balloon_compaction.c	virtio_balloon: fix deadlock on OOM	2017-11-14 23:57:38 +02:00
bootmem.c	docs/mm: bootmem: add overview documentation	2018-08-02 12:17:27 -06:00
cleancache.c	mm: use octal not symbolic permissions	2018-06-15 07:55:25 +09:00
cma_debug.c	mm/cma_debug.c: fix the break condition in cma_maxchunk_get()	2019-06-15 11:54:01 +02:00
cma.c	mm/cma.c: fail if fixed declaration can't be honored	2019-08-06 19:06:51 +02:00
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: clear total_{migrate,free}_scanned before scanning a new zone	2019-10-05 13:10:13 +02:00
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: get rid of vmacache_flush_all() entirely	2018-09-13 15:18:04 -10:00
dmapool.c	mm: use octal not symbolic permissions	2018-06-15 07:55:25 +09:00
early_ioremap.c	mm/early_ioremap: Fix boot hang with earlyprintk=efi,keep	2017-12-11 14:54:44 +01:00
fadvise.c	vfs: implement readahead(2) using POSIX_FADV_WILLNEED	2018-08-30 20:01:32 +02:00
failslab.c	mm: use octal not symbolic permissions	2018-06-15 07:55:25 +09:00
filemap.c	mm/filemap.c: don't initiate writeback if mapping has no dirty pages	2019-11-12 19:21:20 +01:00
frame_vector.c	mm/frame_vector.c: release a semaphore in 'get_vaddr_frames()'	2017-12-14 16:00:48 -08:00
frontswap.c	mm: use octal not symbolic permissions	2018-06-15 07:55:25 +09:00
gup_benchmark.c	mm/gup_benchmark: fix unsigned comparison to zero in __gup_benchmark_ioctl	2018-10-05 16:32:04 -07:00
gup.c	mm/gup.c: remove some BUG_ONs from get_gate_page()	2019-07-31 07:27:08 +02:00
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	mm, hmm: mark hmm_devmem_{add, add_resource} EXPORT_SYMBOL_GPL	2019-01-13 09:51:04 +01:00
huge_memory.c	mm, page_owner: handle THP splits correctly	2019-08-29 08:28:57 +02:00
hugetlb_cgroup.c	mm: hugetlb: switch to css_tryget() in hugetlb_cgroup_charge_cgroup()	2019-11-20 18:45:20 +01:00
hugetlb.c	hugetlbfs: don't access uninitialized memmaps in pfn_range_valid_gigantic()	2019-10-29 09:19:59 +01:00
hwpoison-inject.c	mm/memory_failure: Remove unused trapno from memory_failure	2018-01-23 12:17:42 -06:00
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: Change return type int to vm_fault_t for fault handlers	2018-08-23 18:48:44 -07:00
interval_tree.c	mm/interval_tree.c: use vma_pages() helper	2018-01-31 17:18:37 -08:00
Kconfig	mm/hmm: select mmu notifier when selecting HMM	2019-06-15 11:54:00 +02:00
Kconfig.debug	mm: clarify CONFIG_PAGE_POISONING and usage	2018-08-22 10:52:44 -07:00
khugepaged.c	coredump: fix race condition between collapse_huge_page() and core dumping	2019-06-22 08:15:21 +02:00
kmemleak-test.c
kmemleak.c	Revert "kmemleak: allow to coexist with fault injection"	2019-08-25 10:47:58 +02:00
ksm.c	include/linux/compiler*.h: make compiler-*.h mutually exclusive	2018-08-22 17:31:34 -07:00
list_lru.c	mm/list_lru.c: fix memory leak in __memcg_init_list_lru_node	2019-06-19 08:17:59 +02:00
maccess.c	mm: docs: fix parameter names mismatch	2018-02-06 18:32:48 -08:00
madvise.c	mm: madvise(MADV_DODUMP): allow hugetlbfs pages	2018-10-05 16:32:05 -07:00
Makefile	vfs: implement readahead(2) using POSIX_FADV_WILLNEED	2018-08-30 20:01:32 +02:00
memblock.c	mm/memblock.c: replace u64 with phys_addr_t where appropriate	2018-08-17 16:20:30 -07:00
memcontrol.c	mm: memcg: switch to css_tryget() in get_mem_cgroup_from_mm()	2019-11-20 18:45:19 +01:00
memfd.c	memfd: Use radix_tree_deref_slot_protected to avoid the warning.	2019-11-20 18:47:53 +01:00
memory_hotplug.c	mm/memory_hotplug: fix updating the node span	2019-11-24 08:19:13 +01:00
memory-failure.c	mm/memory-failure: poison read receives SIGKILL instead of SIGBUS if mmaped more than once	2019-10-29 09:19:59 +01:00
memory.c	mm: use down_read_killable for locking mmap_sem in access_remote_vm	2019-07-31 07:27:09 +02:00
mempolicy.c	mm: mempolicy: fix the wrong return value and potential pages leak of mbind	2019-11-20 18:45:19 +01:00
mempool.c	mm/mempool.c: add missing parameter description	2018-08-22 10:52:44 -07:00
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/migrate.c: initialize pud_entry in migrate_vma()	2019-09-16 08:22:22 +02:00
mincore.c	mm/mincore.c: make mincore() more conservative	2019-05-22 07:37:40 +02:00
mlock.c	mm/mlock.c: change count_mm_mlocked_page_nr return type	2019-07-10 09:53:40 +02:00
mm_init.c	mm: access zone->node via zone_to_nid() and zone_set_nid()	2018-08-22 10:52:45 -07:00
mmap.c	coredump: fix race condition between mmget_not_zero()/get_task_mm() and core dumping	2019-04-27 09:36:37 +02:00
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: use hlist_add_head_rcu()	2019-07-31 07:27:08 +02:00
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	x86/speculation/l1tf: Disallow non privileged high MMIO PROT_NONE mappings	2018-06-20 19:10:01 +02:00
mremap.c	mremap: properly flush TLB before releasing the page	2018-10-18 11:30:52 +02:00
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	mm/memblock: add a name for memblock flags enumeration	2018-08-02 12:17:27 -06:00
nommu.c	mm: use down_read_killable for locking mmap_sem in access_remote_vm	2019-07-31 07:27:09 +02:00
oom_kill.c	memcg, oom: don't require __GFP_FS when invoking memcg OOM killer	2019-10-05 13:10:07 +02:00
page_alloc.c	mm, meminit: recalculate pcpu batch and high limits after init completes	2019-11-12 19:20:35 +01:00
page_counter.c	memcg: introduce memory.min	2018-06-07 17:34:36 -07:00
page_ext.c	mm/page_ext.c: fix an imbalance with kmemleak	2019-04-05 22:32:58 +02:00
page_idle.c	mm/page_idle.c: fix oops because end_pfn is larger than max_pfn	2019-07-03 13:14:45 +02:00
page_io.c	swap,blkcg: issue swap io with the appropriate context	2018-07-09 09:07:54 -06:00
page_isolation.c	mm, migrate: remove reason argument from new_page_t	2018-04-11 10:28:32 -07:00
page_owner.c	mm/page_owner: don't access uninitialized memmaps when reading /proc/pagetypeinfo	2019-10-29 09:19:58 +01:00
page_poison.c	page_poison: play nicely with KASAN	2019-04-05 22:32:59 +02:00
page_vma_mapped.c	mm/rmap: map_pte() was not handling private ZONE_DEVICE page properly	2018-11-13 11:08:46 -08:00
page-writeback.c	mm/page-writeback.c: don't break integrity writeback on ->writepage() error	2019-01-26 09:32:43 +01:00
pagewalk.c	mm: kernel-doc: add missing parameter descriptions	2018-04-05 21:36:27 -07:00
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: convert spin_lock_irq to spin_lock_irqsave.	2019-02-12 19:47:12 +01:00
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	percpu: do not search past bitmap when allocating an area	2019-06-15 11:54:11 +02:00
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	vfs: implement readahead(2) using POSIX_FADV_WILLNEED	2018-08-30 20:01:32 +02:00
rmap.c	mm/hmm: fix bad subpage pointer in try_to_unmap_one	2019-08-25 10:47:43 +02:00
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	tmpfs: fix uninitialized return value in shmem_link	2019-03-23 20:09:52 +01:00
slab_common.c	mm: add support for kmem caches in DMA32 zone	2019-04-03 06:26:28 +02:00
slab.c	mm/slab.c: fix an infinite loop in leaks_show()	2019-06-15 11:54:01 +02:00
slab.h	mm: add support for kmem caches in DMA32 zone	2019-04-03 06:26:28 +02:00
slob.c	slab: __GFP_ZERO is incompatible with a constructor	2018-06-07 17:34:34 -07:00
slub.c	mm/slub: fix a deadlock in show_slab_objects()	2019-10-29 09:19:58 +01:00
sparse-vmemmap.c	mm/sparse: delete old sparse_init and enable new one	2018-08-17 16:20:32 -07:00
sparse.c	mm/sparse: fix a bad comparison	2019-04-05 22:32:58 +02:00
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, get_swap_pages: use entry_size instead of cluster in parameter	2018-08-22 10:52:44 -07:00
swap_state.c	treewide: kvzalloc() -> kvcalloc()	2018-06-12 16:19:22 -07:00
swap.c	mm/swap: fix release_pages() when releasing devmap pages	2019-07-31 07:27:03 +02:00
swapfile.c	mm, swap: bounds check swap_info array accesses to avoid NULL derefs	2019-04-05 22:32:58 +02:00
truncate.c	mm: cleancache: fix corruption on missed inode invalidation	2018-12-05 19:32:13 +01:00
usercopy.c	usercopy: Avoid HIGHMEM pfn warning	2019-10-11 18:20:58 +02:00
userfaultfd.c	hugetlb: use same fault hash key for shared and private mappings	2019-05-22 07:37:40 +02:00
util.c	mm: page_mapped: don't assume compound page is huge or THP	2019-01-16 22:04:36 +01:00
vmacache.c	mm: get rid of vmacache_flush_all() entirely	2018-09-13 15:18:04 -10:00
vmalloc.c	mm/vmalloc: Sync unmappings in __purge_vmap_area_lazy()	2019-08-16 10:12:40 +02:00
vmpressure.c	mm/vmpressure.c: fix a signedness bug in vmpressure_register_event()	2019-10-17 13:45:19 -07:00
vmscan.c	mm: vmscan: check if mem cgroup is disabled or not before calling memcg slab shrinker	2019-08-06 19:06:54 +02:00
vmstat.c	mm, vmstat: hide /proc/pagetypeinfo from normal users	2019-11-12 19:20:36 +01:00
workingset.c	mm/list_lru: introduce list_lru_shrink_walk_irq()	2018-08-17 16:20:32 -07:00
z3fold.c	z3fold: fix possible reclaim races	2018-12-01 09:37:33 +01:00
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 build when CONFIG_COMPACTION=n	2019-09-06 10:22:08 +02:00
zswap.c	zswap: re-check zswap_is_full() after do zswap_shrink()	2018-07-26 19:38:03 -07:00