Hugh Dickins ee40d543e9 mm/pagewalk: fix bootstopping regression from extra pte_unmap() ... Mikhail reports early-6.6-based Fedora Rawhide not booting: "rcu_preempt detected expedited stalls", minutes wait, and then hung_task splat while kworker trying to synchronize_rcu_expedited(). Nothing logged to disk. He bisected to my 6.6 a349d72fd9 ("mm/pgtable: add rcu_read_lock() and rcu_read_unlock()s"): but the one to blame is my 6.5 commit to fix the espfix "bad pmd" warnings when booting x86_64 with CONFIG_EFI_PGT_DUMP=y. Gaah, that added an "addr >= TASK_SIZE" check to avoid pte_offset_map(), but failed to add the equivalent check when choosing to pte_unmap(). It's not a problem on 6.5 (for different reasons, it's harmless on both 64-bit and 32-bit), but becomes a bootstopper on 6.6 with the unbalanced rcu_read_unlock() - RCU has a WARN_ON_ONCE for that, but it would have scrolled off Mikhail's console too quickly. Reported-by: Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com> Closes: https://lore.kernel.org/linux-mm/CABXGCsNi8Tiv5zUPNXr6UJw6qV1VdaBEfGqEAMkkXE3QPvZuAQ@mail.gmail.com/ Fixes: 8b1cb4a2e8 ("mm/pagewalk: fix EFI_PGT_DUMP of espfix area") Fixes: a349d72fd9 ("mm/pgtable: add rcu_read_lock() and rcu_read_unlock()s") Signed-off-by: Hugh Dickins <hughd@google.com> Tested-by: Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2023-09-02 08:39:21 -07:00
..
damon	merge mm-hotfixes-stable into mm-stable to pick up depended-upon changes	2023-08-21 14:26:20 -07:00
kasan	kasan, slub: fix HW_TAGS zeroing with slub_debug	2023-07-08 09:29:32 -07:00
kfence	- An extensive rework of kexec and crash Kconfig from Eric DeVolder	2023-08-29 14:53:51 -07:00
kmsan	mm: kmsan: use helper macros PAGE_ALIGN and PAGE_ALIGN_DOWN	2023-08-21 13:37:29 -07:00
backing-dev.c	writeback: remove redundant checks for root memcg	2023-08-21 13:37:48 -07:00
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	dma-maping updates for Linux 6.6	2023-08-29 20:32:10 -07:00
cma.h
compaction.c	merge mm-hotfixes-stable into mm-stable to pick up depended-upon changes	2023-08-21 14:26:20 -07:00
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	Add x86 shadow stack support	2023-08-31 12:20:12 -07:00
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	- Some swap cleanups from Ma Wupeng ("fix WARN_ON in add_to_avail_list")	2023-08-29 14:25:26 -07:00
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	Add x86 shadow stack support	2023-08-31 12:20:12 -07:00
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	Add x86 shadow stack support	2023-08-31 12:20:12 -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: hugetlb_vmemmap: fix a race between vmemmap pmd split	2023-08-18 10:12:14 -07:00
hugetlb_vmemmap.h
hugetlb.c	hugetlb: add documentation for vma_kernel_pagesize()	2023-08-24 16:20:31 -07:00
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	Add x86 shadow stack support	2023-08-31 12:20:12 -07:00
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	Rename kmemleak_initialized to kmemleak_late_initialized	2023-08-21 13:38:02 -07:00
ksm.c	merge mm-hotfixes-stable into mm-stable to pick up depended-upon changes	2023-08-21 14:26:20 -07:00
list_lru.c
maccess.c	mm: Fix copy_from_user_nofault().	2023-04-12 17:36:23 -07:00
madvise.c	swap: remove remnants of polling from read_swap_cache_async	2023-08-24 16:20:16 -07:00
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	mm: disable kernelcore=mirror when no mirror memory	2023-08-21 13:37:43 -07:00
memcontrol.c	mm: fix get_mctgt_type() kernel-doc	2023-08-24 16:20:30 -07:00
memfd.c	memfd: replace ratcheting feature from vm.memfd_noexec with hierarchy	2023-08-21 13:37:59 -07:00
memory_hotplug.c	mm/memory_hotplug: embed vmem_altmap details in memory block	2023-08-21 13:37:49 -07:00
memory-failure.c	mm: memory-failure: fix potential page refcnt leak in memory_failure()	2023-08-24 16:20:16 -07:00
memory-tiers.c	memory tier: use helper macro __ATTR_RW()	2023-08-18 10:12:38 -07:00
memory.c	Add x86 shadow stack support	2023-08-31 12:20:12 -07:00
mempolicy.c	mm: convert prep_transhuge_page() to folio_prep_large_rmappable()	2023-08-21 14:28:43 -07:00
mempool.c
memremap.c	mm/memremap.c: fix outdated comment in devm_memremap_pages	2023-02-09 16:51:46 -08:00
memtest.c	mm: memtest: convert to memtest_report_meminfo()	2023-08-21 13:37:47 -07:00
migrate_device.c	Add x86 shadow stack support	2023-08-31 12:20:12 -07:00
migrate.c	Add x86 shadow stack support	2023-08-31 12:20:12 -07:00
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	mm/mm_init: use helper macro BITS_PER_LONG and BITS_PER_BYTE	2023-08-21 13:37:47 -07:00
mm_slot.h
mmap_lock.c
mmap.c	Add x86 shadow stack support	2023-08-31 12:20:12 -07:00
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	mm/huge pud: use transparent huge pud helpers only with CONFIG_TRANSPARENT_HUGEPAGE	2023-08-18 10:12:54 -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: add large_rmappable page flag	2023-08-21 14:28:44 -07:00
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	mm: page_idle: convert page idle to use a folio	2023-01-18 17:12:52 -08:00
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: redefine MAX_ORDER sanely	2023-04-05 19:42:46 -07:00
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	mm: remove folio_account_redirty	2023-08-21 14:52:16 +02:00
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/percpu.c: print error message too if atomic alloc failed	2023-08-25 08:04:59 -07:00
pgalloc-track.h
pgtable-generic.c	mm/pgtable: notes on pte_offset_map[_lock]()	2023-08-18 10:12:25 -07:00
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	filemap: Allow __filemap_get_folio to allocate large folios	2023-07-24 18:04:30 -04:00
rmap.c	mm/swap: stop using page->private on tail pages for THP_SWAP	2023-08-24 16:20:28 -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	shmem: Add default quota limit mount options	2023-08-09 09:15:40 +02:00
shmem.c	- Some swap cleanups from Ma Wupeng ("fix WARN_ON in add_to_avail_list")	2023-08-29 14:25:26 -07:00
show_mem.c	mm,thp: no space after colon in Mem-Info fields	2023-08-21 13:38:01 -07:00
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	dma-maping updates for Linux 6.6	2023-08-29 20:32:10 -07:00
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/sparse: remove redundant judgments from macro for_each_present_section_nr	2023-08-18 10:12:14 -07:00
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	swap: remove remnants of polling from read_swap_cache_async	2023-08-24 16:20:16 -07:00
swapfile.c	mm/swap: inline folio_set_swap_entry() and folio_swap_entry()	2023-08-24 16:20:28 -07:00
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	Add x86 shadow stack support	2023-08-31 12:20:12 -07:00
util.c	Add x86 shadow stack support	2023-08-31 12:20:12 -07:00
vmalloc.c	mm: add a call to flush_cache_vmap() in vmap_pfn()	2023-08-21 13:07:21 -07:00
vmpressure.c	net-memcg: Fix scope of sockmem pressure indicators	2023-08-16 12:21:32 +01:00
vmscan.c	mm/swap: inline folio_set_swap_entry() and folio_swap_entry()	2023-08-24 16:20:28 -07:00
vmstat.c	mm/vmstat: remove unused page_ext.h from vmstat	2023-08-21 13:37:30 -07:00
workingset.c	mm: memcg: use rstat for non-hierarchical stats	2023-08-24 16:20:18 -07:00
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/swap: inline folio_set_swap_entry() and folio_swap_entry()	2023-08-24 16:20:28 -07:00