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BUG: KCSAN: data-race in __filemap_remove_folio / nr_blockdev_pages

read-write to 0xffff888100482b20 of 8 bytes by task 29013 on cpu 0:
 page_cache_delete mm/filemap.c:150 [inline]
 __filemap_remove_folio+0x224/0x320 mm/filemap.c:228
 __remove_mapping+0x35b/0x480 mm/vmscan.c:1457
 remove_mapping+0x23/0xa0 mm/vmscan.c:1490
 mapping_evict_folio mm/truncate.c:282 [inline]
 mapping_try_invalidate+0x2a9/0x3f0 mm/truncate.c:521
 invalidate_mapping_pages+0x27/0x30 mm/truncate.c:559
 invalidate_bdev+0x6b/0x80 block/bdev.c:87
 loop_set_status+0x114/0x550 drivers/block/loop.c:1281
 lo_ioctl+0x892/0x12e0
 blkdev_ioctl+0x375/0x460 block/ioctl.c:621
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xcf/0x140 fs/ioctl.c:856
 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff888100482b20 of 8 bytes by task 9496 on cpu 1:
 nr_blockdev_pages+0x7f/0xd0 block/bdev.c:458
 si_meminfo+0x87/0xd0 mm/show_mem.c:83
 update_defense_level+0x43/0x580 net/netfilter/ipvs/ip_vs_ctl.c:101
 defense_work_handler+0x1f/0x80 net/netfilter/ipvs/ip_vs_ctl.c:235
 process_one_work+0x434/0x860 kernel/workqueue.c:2600
 worker_thread+0x5f2/0xa10 kernel/workqueue.c:2751
 kthread+0x1d7/0x210 kernel/kthread.c:389
 ret_from_fork+0x2e/0x40 arch/x86/kernel/process.c:145
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

value changed: 0x0000000000000040 -> 0x0000000000000037

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 9496 Comm: kworker/1:8 Not tainted 6.5.0-rc7-syzkaller-00164-g382d4cd18475 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Workqueue: events_long defense_work_handler
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