Miaohe Lin 0d73477af9 mm/huge_memory: don't unpoison huge_zero_folio ... commit fe6f86f4b4 upstream. When I did memory failure tests recently, below panic occurs: kernel BUG at include/linux/mm.h:1135! invalid opcode: 0000 [#1] PREEMPT SMP NOPTI CPU: 9 PID: 137 Comm: kswapd1 Not tainted 6.9.0-rc4-00491-gd5ce28f156fe-dirty #14 RIP: 0010:shrink_huge_zero_page_scan+0x168/0x1a0 RSP: 0018:ffff9933c6c57bd0 EFLAGS: 00000246 RAX: 000000000000003e RBX: 0000000000000000 RCX: ffff88f61fc5c9c8 RDX: 0000000000000000 RSI: 0000000000000027 RDI: ffff88f61fc5c9c0 RBP: ffffcd7c446b0000 R08: ffffffff9a9405f0 R09: 0000000000005492 R10: 00000000000030ea R11: ffffffff9a9405f0 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffff88e703c4ac00 FS: 0000000000000000(0000) GS:ffff88f61fc40000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f4da6e9878 CR3: 0000000c71048000 CR4: 00000000000006f0 Call Trace: <TASK> do_shrink_slab+0x14f/0x6a0 shrink_slab+0xca/0x8c0 shrink_node+0x2d0/0x7d0 balance_pgdat+0x33a/0x720 kswapd+0x1f3/0x410 kthread+0xd5/0x100 ret_from_fork+0x2f/0x50 ret_from_fork_asm+0x1a/0x30 </TASK> Modules linked in: mce_inject hwpoison_inject ---[ end trace 0000000000000000 ]--- RIP: 0010:shrink_huge_zero_page_scan+0x168/0x1a0 RSP: 0018:ffff9933c6c57bd0 EFLAGS: 00000246 RAX: 000000000000003e RBX: 0000000000000000 RCX: ffff88f61fc5c9c8 RDX: 0000000000000000 RSI: 0000000000000027 RDI: ffff88f61fc5c9c0 RBP: ffffcd7c446b0000 R08: ffffffff9a9405f0 R09: 0000000000005492 R10: 00000000000030ea R11: ffffffff9a9405f0 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffff88e703c4ac00 FS: 0000000000000000(0000) GS:ffff88f61fc40000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f4da6e9878 CR3: 0000000c71048000 CR4: 00000000000006f0 The root cause is that HWPoison flag will be set for huge_zero_folio without increasing the folio refcnt. But then unpoison_memory() will decrease the folio refcnt unexpectedly as it appears like a successfully hwpoisoned folio leading to VM_BUG_ON_PAGE(page_ref_count(page) == 0) when releasing huge_zero_folio. Skip unpoisoning huge_zero_folio in unpoison_memory() to fix this issue. We're not prepared to unpoison huge_zero_folio yet. Link: https://lkml.kernel.org/r/20240516122608.22610-1-linmiaohe@huawei.com Fixes: 478d134e95 ("mm/huge_memory: do not overkill when splitting huge_zero_page") Signed-off-by: Miaohe Lin <linmiaohe@huawei.com> Acked-by: David Hildenbrand <david@redhat.com> Reviewed-by: Yang Shi <shy828301@gmail.com> Reviewed-by: Oscar Salvador <osalvador@suse.de> Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Naoya Horiguchi <nao.horiguchi@gmail.com> Cc: Xu Yu <xuyu@linux.alibaba.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Miaohe Lin <linmiaohe@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2024-06-21 14:38:46 +02:00
..
damon	kthread: add kthread_stop_put	2024-06-12 11:12:52 +02:00
kasan	kasan/test: avoid gcc warning for intentional overflow	2024-04-03 15:28:20 +02:00
kfence	LoongArch changes for v6.6	2023-09-08 12:16:52 -07:00
kmsan	kmsan: do not wipe out origin when doing partial unpoisoning	2024-06-16 13:47:41 +02:00
backing-dev.c	blk-wbt: Fix detection of dirty-throttled tasks	2024-02-23 09:25:16 +01:00
balloon_compaction.c
bootmem_info.c
cma_debug.c
cma_sysfs.c	mm: cma: make kobj_type structure constant	2023-03-28 16:20:06 -07:00
cma.c	mm/cma: drop incorrect alignment check in cma_init_reserved_mem	2024-06-16 13:47:42 +02:00
cma.h
compaction.c	mm, treewide: introduce NR_PAGE_ORDERS	2024-05-02 16:32:41 +02:00
debug_page_alloc.c	mm: page_alloc: split out DEBUG_PAGEALLOC	2023-06-09 16:25:23 -07:00
debug_page_ref.c
debug_vm_pgtable.c	mm/debug_vm_pgtable: fix BUG_ON with pud advanced test	2024-03-06 14:48:41 +00:00
debug.c	mm: update validate_mm() to use vma iterator	2023-06-09 16:25:31 -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	2023-06-09 16:25:17 -07:00
early_ioremap.c	mm/early_ioremap.c: improve the execution efficiency of early_ioremap_setup()	2023-06-09 16:25:56 -07:00
fadvise.c	mm: remove unnecessary pagevec includes	2023-06-23 16:59:31 -07:00
fail_page_alloc.c	mm: page_alloc: split out FAIL_PAGE_ALLOC	2023-06-09 16:25:23 -07:00
failslab.c
filemap.c	mm: cachestat: fix two shmem bugs	2024-04-03 15:28:55 +02:00
folio-compat.c	filemap: Add fgf_t typedef	2023-07-24 18:04:30 -04:00
gup_test.c	Merge mm-hotfixes-stable into mm-stable to pick up depended-upon changes.	2023-06-23 16:58:19 -07:00
gup_test.h
gup.c	mm/madvise: make MADV_POPULATE_(READ|WRITE) handle VM_FAULT_RETRY properly	2024-05-02 16:32:40 +02:00
highmem.c	mm: ptep_get() conversion	2023-06-19 16:19:25 -07:00
hmm.c	mm: enable page walking API to lock vmas during the walk	2023-08-21 13:07:20 -07:00
huge_memory.c	mm: fix race between __split_huge_pmd_locked() and GUP-fast	2024-06-16 13:47:40 +02:00
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: hugetlb_vmemmap: fix a race between vmemmap pmd split	2023-08-18 10:12:14 -07:00
hugetlb_vmemmap.h
hugetlb.c	mm/hugetlb: pass correct order_per_bit to cma_declare_contiguous_nid	2024-06-16 13:47:42 +02:00
hwpoison-inject.c
init-mm.c	mm: move dummy_vm_ops out of a header	2023-08-21 13:37:46 -07:00
internal.h	mm/madvise: make MADV_POPULATE_(READ|WRITE) handle VM_FAULT_RETRY properly	2024-05-02 16:32:40 +02:00
interval_tree.c
io-mapping.c
ioremap.c	mm: ioremap: remove unneeded ioremap_allowed and iounmap_allowed	2023-08-18 10:12:36 -07:00
Kconfig	- Some swap cleanups from Ma Wupeng ("fix WARN_ON in add_to_avail_list")	2023-08-29 14:25:26 -07:00
Kconfig.debug	mm: page_table_check: Make it dependent on EXCLUSIVE_SYSTEM_RAM	2023-05-29 16:14:28 +01:00
khugepaged.c	- Some swap cleanups from Ma Wupeng ("fix WARN_ON in add_to_avail_list")	2023-08-29 14:25:26 -07:00
kmemleak.c	mm/kmemleak: move up cond_resched() call in page scanning loop	2023-09-02 15:17:34 -07:00
ksm.c	mm/ksm: fix ksm_zero_pages accounting	2024-06-16 13:47:41 +02:00
list_lru.c
maccess.c	mm: Fix copy_from_user_nofault().	2023-04-12 17:36:23 -07:00
madvise.c	mm/madvise: make MADV_POPULATE_(READ|WRITE) handle VM_FAULT_RETRY properly	2024-05-02 16:32:40 +02:00
Makefile	- Some swap cleanups from Ma Wupeng ("fix WARN_ON in add_to_avail_list")	2023-08-29 14:25:26 -07:00
mapping_dirty_helpers.c	mm: fix clean_record_shared_mapping_range kernel-doc	2023-08-24 16:20:30 -07:00
memblock.c	x86/numa: Fix the address overlap check in numa_fill_memblks()	2024-03-01 13:35:06 +01:00
memcontrol.c	mm: memcontrol: clarify swapaccount=0 deprecation warning	2024-03-01 13:35:00 +01:00
memfd.c	revert "memfd: improve userspace warnings for missing exec-related flags".	2023-09-05 11:11:52 -07:00
memory_hotplug.c	mm/memory_hotplug: fix memmap_on_memory sysfs value retrieval	2024-01-20 11:51:49 +01:00
memory-failure.c	mm/huge_memory: don't unpoison huge_zero_folio	2024-06-21 14:38:46 +02:00
memory-tiers.c	memory tier: use helper macro __ATTR_RW()	2023-08-18 10:12:38 -07:00
memory.c	x86/mm/pat: fix VM_PAT handling in COW mappings	2024-04-10 16:36:03 +02:00
mempolicy.c	numa: Generalize numa_map_to_online_node()	2023-11-20 11:58:51 +01:00
mempool.c
memremap.c	mm/memremap.c: fix outdated comment in devm_memremap_pages	2023-02-09 16:51:46 -08:00
memtest.c	memtest: use {READ,WRITE}_ONCE in memory scanning	2024-04-03 15:28:33 +02:00
migrate_device.c	Add x86 shadow stack support	2023-08-31 12:20:12 -07:00
migrate.c	mm/vmscan: fix a bug calling wakeup_kswapd() with a wrong zone index	2024-03-15 10:48:14 -04:00
mincore.c	mm: enable page walking API to lock vmas during the walk	2023-08-21 13:07:20 -07:00
mlock.c	merge mm-hotfixes-stable into mm-stable to pick up depended-upon changes	2023-08-21 14:26:20 -07:00
mm_init.c	efi: disable mirror feature during crashkernel	2024-01-31 16:18:56 -08:00
mm_slot.h
mmap_lock.c
mmap.c	mm, mmap: fix vma_merge() case 7 with vma_ops->close	2024-04-03 15:28:40 +02:00
mmu_gather.c	mm: fix kernel-doc warning from tlb_flush_rmaps()	2023-08-24 16:20:30 -07:00
mmu_notifier.c	mmu_notifiers: rename invalidate_range notifier	2023-08-18 10:12:41 -07:00
mmzone.c
mprotect.c	Add x86 shadow stack support	2023-08-31 12:20:12 -07:00
mremap.c	vm: fix move_vma() memory accounting being off	2023-09-16 15:23:31 -07:00
msync.c
nommu.c	Add x86 shadow stack support	2023-08-31 12:20:12 -07:00
oom_kill.c	mm: remove redundant K() macro definition	2023-08-21 13:37:44 -07:00
page_alloc.c	mm, treewide: introduce NR_PAGE_ORDERS	2024-05-02 16:32:41 +02:00
page_counter.c
page_ext.c	mm/page_ext: move functions around for minor cleanups to page_ext	2023-08-18 10:12:31 -07:00
page_idle.c
page_io.c	zswap: make zswap_load() take a folio	2023-08-21 13:37:27 -07:00
page_isolation.c	mm/hugetlb: get rid of page_hstate()	2023-08-18 10:12:39 -07:00
page_owner.c	mm/page_ext: use page_ext_data helper in page_owner	2023-08-21 13:37:27 -07:00
page_poison.c	mm/page_poison: remove unused page_ext.h from page_poison	2023-08-21 13:37:30 -07:00
page_reporting.c	mm, treewide: introduce NR_PAGE_ORDERS	2024-05-02 16:32:41 +02:00
page_reporting.h
page_table_check.c	mm: convert page_table_check_pte_set() to page_table_check_ptes_set()	2023-08-24 16:20:18 -07:00
page_vma_mapped.c	mm: correct stale comment of function check_pte	2023-08-18 10:12:13 -07:00
page-writeback.c	blk-wbt: Fix detection of dirty-throttled tasks	2024-02-23 09:25:16 +01:00
pagewalk.c	mm/pagewalk: fix bootstopping regression from extra pte_unmap()	2023-09-02 08:39:21 -07:00
percpu-internal.h	percpu-internal/pcpu_chunk: re-layout pcpu_chunk structure to reduce false sharing	2023-06-19 16:19:29 -07:00
percpu-km.c
percpu-stats.c
percpu-vm.c
percpu.c	mm: Introduce flush_cache_vmap_early()	2024-02-16 19:10:52 +01:00
pgalloc-track.h
pgtable-generic.c	mm: fix race between __split_huge_pmd_locked() and GUP-fast	2024-06-16 13:47:40 +02:00
process_vm_access.c	mm/gup: remove unused vmas parameter from pin_user_pages_remote()	2023-06-09 16:25:25 -07:00
ptdump.c	mm: ptdump should use ptep_get_lockless()	2023-06-19 16:19:24 -07:00
readahead.c	mm: use memalloc_nofs_save() in page_cache_ra_order()	2024-05-17 12:02:36 +02:00
rmap.c	mm: hugetlb: add huge page size param to set_huge_pte_at()	2023-09-29 17:20:47 -07:00
rodata_test.c
secretmem.c	mm/secretmem: use a folio in secretmem_fault()	2023-08-21 13:38:02 -07:00
shmem_quota.c	tmpfs: fix race on handling dquot rbtree	2024-04-03 15:28:54 +02:00
shmem.c	mm/shmem: inline shmem_is_huge() for disabled transparent hugepages	2024-04-27 17:11:42 +02:00
show_mem.c	mm, treewide: introduce NR_PAGE_ORDERS	2024-05-02 16:32:41 +02:00
shrinker_debug.c	Revert "mm: shrinkers: make count and scan in shrinker debugfs lockless"	2023-06-19 13:19:34 -07:00
shuffle.c
shuffle.h	mm, treewide: redefine MAX_ORDER sanely	2023-04-05 19:42:46 -07:00
slab_common.c	mm: slab: Do not create kmalloc caches smaller than arch_slab_minalign()	2023-10-11 15:24:49 +02:00
slab.c	Randomized slab caches for kmalloc()	2023-07-18 10:07:47 +02:00
slab.h	Randomized slab caches for kmalloc()	2023-07-18 10:07:47 +02:00
slub.c	mm/slub: remove freelist_dereference()	2023-07-14 09:57:21 +02:00
sparse-vmemmap.c	mm/vmemmap: allow architectures to override how vmemmap optimization works	2023-08-18 10:12:53 -07:00
sparse.c	mm/sparsemem: fix race in accessing memory_section->usage	2024-01-31 16:18:56 -08:00
swap_cgroup.c
swap_slots.c
swap_state.c	mm/swap: inline folio_set_swap_entry() and folio_swap_entry()	2023-08-24 16:20:28 -07:00
swap.c	mm: remove references to pagevec	2023-06-23 16:59:30 -07:00
swap.h	mm/swap: fix race when skipping swapcache	2024-03-01 13:35:00 +01:00
swapfile.c	mm: swap: fix race between free_swap_and_cache() and swapoff()	2024-04-03 15:28:27 +02:00
truncate.c	- Some swap cleanups from Ma Wupeng ("fix WARN_ON in add_to_avail_list")	2023-08-29 14:25:26 -07:00
usercopy.c	mm: Fix copy_from_user_nofault().	2023-04-12 17:36:23 -07:00
userfaultfd.c	mm/userfaultfd: Do not place zeropages when zeropages are disallowed	2024-06-12 11:11:33 +02:00
util.c	parisc: fix mmap_base calculation when stack grows upwards	2023-11-28 17:20:08 +00:00
vmalloc.c	mm/vmalloc: fix vmalloc which may return null if called with __GFP_NOFAIL	2024-06-16 13:47:42 +02:00
vmpressure.c	net-memcg: Fix scope of sockmem pressure indicators	2023-08-16 12:21:32 +01:00
vmscan.c	mm, vmscan: prevent infinite loop for costly GFP_NOIO | __GFP_RETRY_MAYFAIL allocations	2024-04-03 15:28:44 +02:00
vmstat.c	mm, treewide: introduce NR_PAGE_ORDERS	2024-05-02 16:32:41 +02:00
workingset.c	mm: ratelimit stat flush from workingset shrinker	2024-06-16 13:47:31 +02:00
z3fold.c	mm/z3fold: remove obsolete comment for struct z3fold_pool	2023-08-21 13:37:51 -07:00
zbud.c	mm: zswap: remove shrink from zpool interface	2023-06-19 16:19:27 -07:00
zpool.c	mm: zswap: remove shrink from zpool interface	2023-06-19 16:19:27 -07:00
zsmalloc.c	merge mm-hotfixes-stable into mm-stable to pick up depended-upon changes	2023-08-21 14:26:20 -07:00
zswap.c	mm: zswap: fix missing folio cleanup in writeback race path	2024-03-01 13:35:10 +01:00