BUG: KCSAN: data-race in folios_put_refs / need_mlock_drain

write to 0xffff888237c2b4a0 of 1 bytes by task 6032 on cpu 0:
 folio_batch_reinit include/linux/pagevec.h:50 [inline]
 folios_put_refs+0x26d/0x2b0 mm/swap.c:956
 folios_put include/linux/mm.h:1548 [inline]
 mlock_folio_batch+0x3255/0x3280 mm/mlock.c:209
 mlock_folio+0x1b7/0x210 mm/mlock.c:259
 mlock_vma_folio mm/internal.h:927 [inline]
 __folio_add_anon_rmap mm/rmap.c:1360 [inline]
 folio_add_anon_rmap_ptes+0x219/0x220 mm/rmap.c:1383
 remove_migration_pte+0x62e/0x9c0 mm/migrate.c:333
 rmap_walk_anon+0x28f/0x440 mm/rmap.c:2646
 rmap_walk+0x5b/0x70 mm/rmap.c:2724
 remove_migration_ptes mm/migrate.c:373 [inline]
 migrate_folio_move mm/migrate.c:1389 [inline]
 migrate_pages_batch+0x1374/0x1910 mm/migrate.c:1899
 migrate_pages_sync mm/migrate.c:1965 [inline]
 migrate_pages+0xff1/0x1820 mm/migrate.c:2074
 do_mbind mm/mempolicy.c:1394 [inline]
 kernel_mbind mm/mempolicy.c:1537 [inline]
 __do_sys_mbind mm/mempolicy.c:1611 [inline]
 __se_sys_mbind+0xf79/0x1160 mm/mempolicy.c:1607
 __x64_sys_mbind+0x78/0x90 mm/mempolicy.c:1607
 x64_sys_call+0x2662/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:238
 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 0xffff888237c2b4a0 of 1 bytes by task 6043 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:747 [inline]
 __lru_add_drain_all+0x22a/0x3f0 mm/swap.c:835
 lru_cache_disable+0x1f/0x30 mm/swap.c:888
 do_mbind mm/mempolicy.c:1311 [inline]
 kernel_mbind mm/mempolicy.c:1537 [inline]
 __do_sys_mbind mm/mempolicy.c:1611 [inline]
 __se_sys_mbind+0x4df/0x1160 mm/mempolicy.c:1607
 __x64_sys_mbind+0x78/0x90 mm/mempolicy.c:1607
 x64_sys_call+0x2662/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:238
 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: 0x01 -> 0x00

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 6043 Comm: syz.3.1000 Not tainted 6.13.0-rc6-syzkaller-00059-g643e2e259c2b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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