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BUG: KCSAN: data-race in nr_blockdev_pages / page_cache_delete

read-write to 0xffff888100439c88 of 8 bytes by task 1846 on cpu 1:
 page_cache_delete+0x32c/0x360 mm/filemap.c:145
 __filemap_remove_folio+0x3b/0xf0 mm/filemap.c:223
 __remove_mapping+0x42a/0x530 mm/vmscan.c:1305
 remove_mapping+0x1f/0x140 mm/vmscan.c:1338
 mapping_evict_folio mm/truncate.c:282 [inline]
 invalidate_mapping_pagevec+0x44d/0x5d0 mm/truncate.c:528
 invalidate_mapping_pages+0x23/0x30 mm/truncate.c:567
 invalidate_bdev+0x67/0x80 block/bdev.c:88
 bdev_disk_changed+0xed/0xc30 block/partitions/core.c:666
 blkdev_get_whole block/bdev.c:686 [inline]
 blkdev_get_by_dev+0x3c0/0x9c0 block/bdev.c:823
 blkdev_open+0xac/0x140 block/fops.c:481
 do_dentry_open+0x521/0x850 fs/open.c:848
 vfs_open+0x43/0x50 fs/open.c:981
 do_open fs/namei.c:3520 [inline]
 path_openat+0x16cf/0x1b30 fs/namei.c:3653
 do_filp_open+0x105/0x220 fs/namei.c:3680
 do_sys_openat2+0xb5/0x2a0 fs/open.c:1278
 do_sys_open fs/open.c:1294 [inline]
 __do_sys_openat fs/open.c:1310 [inline]
 __se_sys_openat fs/open.c:1305 [inline]
 __x64_sys_openat+0xef/0x110 fs/open.c:1305
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x46/0xb0

read to 0xffff888100439c88 of 8 bytes by task 78 on cpu 0:
 nr_blockdev_pages+0x7f/0xd0 block/bdev.c:524
 si_meminfo+0x3a/0x60 mm/page_alloc.c:5835
 update_defense_level+0x46/0x560 net/netfilter/ipvs/ip_vs_ctl.c:102
 defense_work_handler+0x1b/0x80 net/netfilter/ipvs/ip_vs_ctl.c:236
 process_one_work+0x3d3/0x720 kernel/workqueue.c:2289
 worker_thread+0x618/0xa70 kernel/workqueue.c:2436
 kthread+0x1a9/0x1e0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30

value changed: 0x0000000000000001 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 78 Comm: kworker/0:2 Not tainted 5.19.0-rc6-syzkaller-00026-g5a29232d870d-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
Workqueue: events_long defense_work_handler
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