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BUG: KCSAN: data-race in __lru_add_drain_all / lru_cache_add_inactive_or_unevictable

write to 0xffff888237c22528 of 1 bytes by task 20717 on cpu 0:
 pagevec_add include/linux/pagevec.h:74 [inline]
 pagevec_add_and_need_flush mm/swap.c:222 [inline]
 lru_cache_add mm/swap.c:452 [inline]
 lru_cache_add_inactive_or_unevictable+0xaa/0x270 mm/swap.c:484
 do_anonymous_page+0x716/0x8b0 mm/memory.c:3808
 handle_pte_fault mm/memory.c:4557 [inline]
 __handle_mm_fault mm/memory.c:4694 [inline]
 handle_mm_fault+0x7f5/0x1580 mm/memory.c:4792
 do_user_addr_fault+0x609/0xbe0 arch/x86/mm/fault.c:1390
 handle_page_fault arch/x86/mm/fault.c:1475 [inline]
 exc_page_fault+0x91/0x220 arch/x86/mm/fault.c:1531
 asm_exc_page_fault+0x1e/0x30

read to 0xffff888237c22528 of 1 bytes by task 20715 on cpu 1:
 pagevec_count include/linux/pagevec.h:61 [inline]
 __lru_add_drain_all+0x12c/0x3e0 mm/swap.c:819
 lru_add_drain_all+0xc/0x10 mm/swap.c:841
 memfd_wait_for_pins mm/memfd.c:82 [inline]
 memfd_add_seals mm/memfd.c:199 [inline]
 memfd_fcntl+0x7f0/0xc80 mm/memfd.c:231
 do_fcntl+0x4d3/0xc70 fs/fcntl.c:430
 __do_sys_fcntl fs/fcntl.c:472 [inline]
 __se_sys_fcntl+0xc6/0x180 fs/fcntl.c:457
 __x64_sys_fcntl+0x3f/0x50 fs/fcntl.c:457
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x0b -> 0x0d

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 20715 Comm: syz-executor.4 Not tainted 5.15.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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