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BUG: KCSAN: data-race in __lru_add_drain_all / folio_batch_move_lru

write to 0xffff888237c29c88 of 1 bytes by task 23965 on cpu 0:
 folio_batch_reinit include/linux/pagevec.h:48 [inline]
 folio_batch_move_lru+0x2bf/0x2f0 mm/swap.c:225
 folio_batch_add_and_move mm/swap.c:234 [inline]
 folio_add_lru mm/swap.c:517 [inline]
 folio_add_lru_vma+0xf4/0x160 mm/swap.c:537
 do_anonymous_page mm/memory.c:4343 [inline]
 do_pte_missing mm/memory.c:3743 [inline]
 handle_pte_fault mm/memory.c:5164 [inline]
 __handle_mm_fault mm/memory.c:5305 [inline]
 handle_mm_fault+0x1da5/0x27c0 mm/memory.c:5470
 faultin_page mm/gup.c:958 [inline]
 __get_user_pages+0x402/0xe40 mm/gup.c:1241
 __get_user_pages_locked mm/gup.c:1509 [inline]
 __gup_longterm_locked+0xeb7/0x1500 mm/gup.c:2211
 pin_user_pages_remote+0x7f/0xb0 mm/gup.c:3358
 process_vm_rw_single_vec mm/process_vm_access.c:106 [inline]
 process_vm_rw_core mm/process_vm_access.c:216 [inline]
 process_vm_rw+0x4f6/0x8c0 mm/process_vm_access.c:284
 __do_sys_process_vm_writev mm/process_vm_access.c:304 [inline]
 __se_sys_process_vm_writev mm/process_vm_access.c:299 [inline]
 __x64_sys_process_vm_writev+0x7a/0x90 mm/process_vm_access.c:299
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

read to 0xffff888237c29c88 of 1 bytes by task 23958 on cpu 1:
 folio_batch_count include/linux/pagevec.h:53 [inline]
 cpu_needs_drain mm/swap.c:795 [inline]
 __lru_add_drain_all+0x137/0x420 mm/swap.c:889
 lru_add_drain_all+0x10/0x20 mm/swap.c:905
 invalidate_bdev+0x54/0x70 block/bdev.c:89
 invalidate_disk+0x29/0x80 block/genhd.c:747
 __loop_clr_fd+0x163/0x3a0 drivers/block/loop.c:1160
 loop_clr_fd drivers/block/loop.c:1253 [inline]
 lo_ioctl+0xe93/0x12e0 drivers/block/loop.c:1557
 blkdev_ioctl+0x375/0x460 block/ioctl.c:634
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0xcf/0x140 fs/ioctl.c:857
 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0x0f -> 0x02

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 23958 Comm: syz-executor.4 Not tainted 6.8.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
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