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Lokesh Gidra 30af24facf userfaultfd: fix deadlock warning when locking src and dst VMAs 
Use down_read_nested() to avoid the warning.

Link: https://lkml.kernel.org/r/20240321235818.125118-1-lokeshgidra@google.com
Fixes: 867a43a34ff8 ("userfaultfd: use per-vma locks in userfaultfd operations")
Reported-by: syzbot+49056626fe41e01f2ba7@syzkaller.appspotmail.com
Signed-off-by: Lokesh Gidra <lokeshgidra@google.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Brian Geffon <bgeffon@google.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Hillf Danton <hdanton@sina.com>
Cc: Jann Horn <jannh@google.com> [Bug #2]
Cc: Kalesh Singh <kaleshsingh@google.com>
Cc: Lokesh Gidra <lokeshgidra@google.com>
Cc: Mike Rapoport (IBM) <rppt@kernel.org>
Cc: Nicolas Geoffray <ngeoffray@google.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-03-26 11:07:23 -07:00
..
damon
mm: madvise: pageout: ignore references rather than clearing young
2024-03-04 17:01:18 -08:00
kasan
- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames
2024-03-14 17:43:30 -07:00
kfence
KFENCE: cleanup kfence_guarded_alloc() after CONFIG_SLAB removal
2023-12-05 11:17:58 +01:00
kmsan
mm: kmsan: remove runtime checks from kmsan_unpoison_memory()
2024-02-22 10:24:41 -08:00
backing-dev.c
vfs-6.9.misc
2024-03-11 09:38:17 -07:00
balloon_compaction.c
…
bootmem_info.c
bootmem: use kmemleak_free_part_phys in put_page_bootmem
2023-10-25 16:47:13 -07:00
cma_debug.c
…
cma_sysfs.c
mm/cma: add sysfs file 'release_pages_success'
2024-02-22 10:24:57 -08:00
cma.c
mm/cma: add sysfs file 'release_pages_success'
2024-02-22 10:24:57 -08:00
cma.h
mm/cma: add sysfs file 'release_pages_success'
2024-02-22 10:24:57 -08:00
compaction.c
- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames
2024-03-14 17:43:30 -07:00
debug_page_alloc.c
mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER
2024-01-08 15:27:15 -08:00
debug_page_ref.c
…
debug_vm_pgtable.c
mm/debug_vm_pgtable: fix BUG_ON with pud advanced test
2024-02-23 17:27:13 -08:00
debug.c
mm: make dump_page() take a const argument
2024-03-06 13:04:18 -08:00
dmapool_test.c
dmapool: add alloc/free performance test
2023-04-05 19:42:38 -07:00
dmapool.c
mm/mempool/dmapool: remove CONFIG_DEBUG_SLAB ifdefs
2023-12-05 11:17:58 +01:00
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
mm: fix unexpected changes to {failslab|fail_page_alloc}.attr
2022-11-22 18:50:44 -08:00
filemap.c
mm: cachestat: fix two shmem bugs
2024-03-26 11:07:20 -07:00
folio-compat.c
mm: remove page_add_new_anon_rmap and lru_cache_add_inactive_or_unevictable
2023-12-29 11:58:27 -08:00
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
mm/gup_test: start/stop/read functionality for PIN LONGTERM test
2022-11-08 17:37:15 -08:00
gup.c
mm: convert page_try_share_anon_rmap() to folio_try_share_anon_rmap_[pte|pmd]()
2023-12-29 11:58:56 -08:00
highmem.c
x86/kexec: use pr_err() instead of kexec_dprintk() when an error occurs
2023-12-29 12:22:28 -08:00
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/huge_memory: skip invalid debugfs new_order input for folio split
2024-03-12 13:07:17 -07:00
hugetlb_cgroup.c
mm, hugetlb: remove HUGETLB_CGROUP_MIN_ORDER
2023-10-18 14:34:17 -07:00
hugetlb_vmemmap.c
mm: hugetlb_vmemmap: move mmap lock to vmemmap_remap_range()
2023-12-12 10:57:08 -08:00
hugetlb_vmemmap.h
mm: hugetlb_vmemmap: fix reference to nonexistent file
2023-10-25 16:47:14 -07:00
hugetlb.c
mm: add an explicit smp_wmb() to UFFDIO_CONTINUE
2024-03-12 13:07:17 -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: Deprecate pasid field
2023-12-12 10:11:32 +01:00
internal.h
- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames
2024-03-14 17:43:30 -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
Kbuild updates for v6.9
2024-03-21 14:41:00 -07:00
Kconfig.debug
mm/slub: unify all sl[au]b parameters with "slab_$param"
2024-01-22 10:31:08 +01:00
khugepaged.c
mm: convert free_swap_cache() to take a folio
2024-03-04 17:01:26 -08:00
kmemleak.c
kmemleak: avoid RCU stalls when freeing metadata for per-CPU pointers
2023-12-12 10:57:07 -08:00
ksm.c
mm: convert page_try_share_anon_rmap() to folio_try_share_anon_rmap_[pte|pmd]()
2023-12-29 11:58:56 -08:00
list_lru.c
mm/zswap: stop lru list shrinking when encounter warm region
2024-02-22 10:24:54 -08:00
maccess.c
mm: Fix copy_from_user_nofault().
2023-04-12 17:36:23 -07:00
madvise.c
mm: madvise: pageout: ignore references rather than clearing young
2024-03-04 17:01:18 -08:00
Makefile
mm/slab: remove CONFIG_SLAB from all Kconfig and Makefile
2023-12-05 11:14:40 +01:00
mapping_dirty_helpers.c
mm: fix clean_record_shared_mapping_range kernel-doc
2023-08-24 16:20:30 -07:00
memblock.c
cxl fixes for 6.8-rc6
2024-02-24 15:53:40 -08:00
memcontrol.c
memcg: remove mem_cgroup_uncharge_list()
2024-03-04 17:01:25 -08:00
memfd.c
mm/memfd: refactor memfd_tag_pins() and memfd_wait_for_pins()
2024-03-04 17:01:21 -08:00
memory_hotplug.c
mm/memory_hotplug: export mhp_supports_memmap_on_memory()
2024-02-22 10:24:40 -08:00
memory-failure.c
mm/memory-failure: fix crash in split_huge_page_to_list from soft_offline_page
2024-02-07 21:20:34 -08:00
memory-tiers.c
mm/demotion: print demotion targets
2024-02-22 10:24:55 -08:00
memory.c
mm/memory: fix missing pte marker for !page on pte zaps
2024-03-26 11:07:19 -07:00
mempolicy.c
mm/mempolicy: use a folio in do_mbind()
2024-03-06 13:04:18 -08:00
mempool.c
mempool: kvmalloc pool
2024-03-13 18:38:13 -04:00
memremap.c
mm: remove stale example from comment
2023-12-29 11:58:26 -08:00
memtest.c
memtest: use {READ,WRITE}_ONCE in memory scanning
2024-03-13 12:12:21 -07:00
migrate_device.c
mm: convert page_try_share_anon_rmap() to folio_try_share_anon_rmap_[pte|pmd]()
2023-12-29 11:58:56 -08:00
migrate.c
merge mm-hotfixes-stable into mm-nonmm-stable to pick up stackdepot changes
2024-02-23 17:28:43 -08:00
mincore.c
mm: enable page walking API to lock vmas during the walk
2023-08-21 13:07:20 -07:00
mlock.c
mm: make folios_put() the basis of release_pages()
2024-03-04 17:01:22 -08:00
mm_init.c
Author: Gang Li padata: dispatch works on
2024-03-06 13:04:17 -08:00
mm_slot.h
mm: introduce common struct mm_slot
2022-10-03 14:02:43 -07:00
mmap_lock.c
…
mmap.c
RISC-V Patches for the 6.9 Merge Window
2024-03-22 10:41:13 -07:00
mmu_gather.c
mm/mmu_gather: improve cond_resched() handling with large folios and expensive page freeing
2024-02-22 15:27:17 -08:00
mmu_notifier.c
mmu_notifiers: rename invalidate_range notifier
2023-08-18 10:12:41 -07:00
mmzone.c
zswap: shrink zswap pool based on memory pressure
2023-12-12 10:57:02 -08:00
mprotect.c
mprotect: use pfn_swap_entry_folio
2024-02-21 16:00:03 -08:00
mremap.c
mm: abstract VMA merge and extend into vma_merge_extend() helper
2023-10-18 14:34:18 -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: remove vmap_area_list
2024-02-23 17:48:19 -08:00
oom_kill.c
mm: update mark_victim tracepoints fields
2024-03-04 17:01:16 -08:00
page_alloc.c
- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames
2024-03-14 17:43:30 -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: 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: memcontrol: implement zswap writeback disabling
2023-12-29 20:22:11 -08:00
page_isolation.c
mm: add alloc_contig_migrate_range allocation statistics
2024-03-04 17:01:27 -08:00
page_owner.c
mm,page_owner: fix recursion
2024-03-26 11:07:20 -07:00
page_poison.c
mm/page_poison: replace kmap_atomic() with kmap_local_page()
2023-12-10 16:51:50 -08:00
page_reporting.c
mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER
2024-01-08 15:27:15 -08:00
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: thp: introduce multi-size THP sysfs interface
2023-12-20 14:48:12 -08:00
page-writeback.c
writeback: remove a use of write_cache_pages() from do_writepages()
2024-02-23 17:48:38 -08:00
pagewalk.c
mm: pagewalk: assert write mmap lock only for walking the user page tables
2023-12-10 16:51:53 -08:00
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()
2023-12-14 00:23:17 -08:00
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: fix process_vm_rw page counts
2023-12-10 16:51:39 -08:00
ptdump.c
mm: ptdump: add check_wx_pages debugfs attribute
2024-02-22 10:24:47 -08:00
readahead.c
mm: support order-1 folios in the page cache
2024-03-04 17:01:19 -08:00
rmap.c
rmap: replace two calls to compound_order with folio_order
2024-02-22 15:27:20 -08:00
rodata_test.c
mm/rodata_test: use PAGE_ALIGNED() helper
2022-10-03 14:03:05 -07:00
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
2024-03-26 11:07:23 -07:00
shmem.c
- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames
2024-03-14 17:43:30 -07:00
show_mem.c
mm, treewide: introduce NR_PAGE_ORDERS
2024-01-08 15:27:15 -08:00
shrinker_debug.c
mm: shrinker: convert shrinker_rwsem to mutex
2023-10-04 10:32:26 -07:00
shrinker.c
mm: shrinker: use kvzalloc_node() from expand_one_shrinker_info()
2024-01-05 09:58:32 -08:00
shuffle.c
mm/shuffle: convert module_param_call to module_param_cb
2022-10-03 14:03:07 -07:00
shuffle.h
mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER
2024-01-08 15:27:15 -08:00
slab_common.c
- Kuan-Wei Chiu has developed the well-named series "lib min_heap: Min
2024-03-14 18:03:09 -07:00
slab.h
Merge branch 'slab/for-6.9/slab-flag-cleanups' into slab/for-linus
2024-03-12 10:16:56 +01:00
slub.c
Merge branch 'slab/for-6.9/slab-flag-cleanups' into slab/for-linus
2024-03-12 10:16:56 +01:00
sparse-vmemmap.c
mm/vmemmap: allow architectures to override how vmemmap optimization works
2023-08-18 10:12:53 -07:00
sparse.c
mm/memory_hotplug: introduce MEM_PREPARE_ONLINE/MEM_FINISH_OFFLINE notifiers
2024-02-21 16:00:01 -08:00
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/zswap: invalidate zswap entry when swap entry free
2024-02-22 10:24:54 -08:00
swap_state.c
mm: convert free_swap_cache() to take a folio
2024-03-04 17:01:26 -08:00
swap.c
mm: fix list corruption in put_pages_list
2024-03-12 13:07:16 -07:00
swap.h
mm/swap: fix race when skipping swapcache
2024-02-20 14:20:48 -08:00
swapfile.c
- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames
2024-03-14 17:43:30 -07:00
truncate.c
fs: convert error_remove_page to error_remove_folio
2023-12-10 16:51:42 -08:00
usercopy.c
mm: Fix copy_from_user_nofault().
2023-04-12 17:36:23 -07:00
userfaultfd.c
userfaultfd: fix deadlock warning when locking src and dst VMAs
2024-03-26 11:07:23 -07:00
util.c
- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames
2024-03-14 17:43:30 -07:00
vmalloc.c
- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames
2024-03-14 17:43:30 -07:00
vmpressure.c
eventfd: simplify eventfd_signal()
2023-11-28 14:08:38 +01:00
vmscan.c
- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames
2024-03-14 17:43:30 -07:00
vmstat.c
mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER
2024-01-08 15:27:15 -08:00
workingset.c
mm: move mapping_set_update out of <linux/swap.h>
2024-02-21 11:36:50 +05:30
z3fold.c
mm/z3fold: fix the comment for __encode_handle()
2024-02-23 17:48:31 -08:00
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
mm/zsmalloc: don't need to reserve LSB in handle
2024-03-04 17:01:28 -08:00
zswap.c
mm: zswap: fix writeback shinker GFP_NOIO/GFP_NOFS recursion
2024-03-26 11:07:22 -07:00