BUG: KCSAN: data-race in mlock_new_folio / need_mlock_drain

read-write to 0xffff888237c2b370 of 1 bytes by task 4736 on cpu 0:
 folio_batch_add include/linux/pagevec.h:77 [inline]
 mlock_new_folio+0x114/0x200 mm/mlock.c:280
 folio_add_lru_vma+0x5d/0x60 mm/swap.c:544
 do_anonymous_page mm/memory.c:4604 [inline]
 do_pte_missing mm/memory.c:3945 [inline]
 handle_pte_fault mm/memory.c:5521 [inline]
 __handle_mm_fault mm/memory.c:5664 [inline]
 handle_mm_fault+0x2372/0x2940 mm/memory.c:5832
 faultin_page mm/gup.c:1194 [inline]
 __get_user_pages+0x499/0x10d0 mm/gup.c:1493
 populate_vma_page_range mm/gup.c:1932 [inline]
 __mm_populate+0x25b/0x3b0 mm/gup.c:2035
 do_mlock+0x401/0x4f0 mm/mlock.c:653
 __do_sys_mlock mm/mlock.c:661 [inline]
 __se_sys_mlock mm/mlock.c:659 [inline]
 __x64_sys_mlock+0x36/0x40 mm/mlock.c:659
 x64_sys_call+0x822/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:150
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff888237c2b370 of 1 bytes by task 4730 on cpu 1:
 folio_batch_count include/linux/pagevec.h:56 [inline]
 need_mlock_drain+0x30/0x50 mm/mlock.c:235
 cpu_needs_drain mm/swap.c:824 [inline]
 __lru_add_drain_all+0x235/0x410 mm/swap.c:912
 lru_add_drain_all+0x10/0x20 mm/swap.c:928
 memfd_wait_for_pins mm/memfd.c:132 [inline]
 memfd_add_seals mm/memfd.c:252 [inline]
 memfd_fcntl+0x7ac/0xc20 mm/memfd.c:286
 do_fcntl+0x484/0xe20 fs/fcntl.c:449
 __do_sys_fcntl fs/fcntl.c:492 [inline]
 __se_sys_fcntl+0xc4/0x190 fs/fcntl.c:477
 __x64_sys_fcntl+0x43/0x50 fs/fcntl.c:477
 x64_sys_call+0x209e/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:73
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x04 -> 0x09

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 4730 Comm: syz.0.467 Not tainted 6.11.0-rc5-syzkaller-00057-g86987d84b968 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
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