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BUG: KCSAN: data-race in __filemap_remove_folio / nr_blockdev_pages

read-write to 0xffff888100630570 of 8 bytes by task 2778 on cpu 0:
 page_cache_delete mm/filemap.c:144 [inline]
 __filemap_remove_folio+0x1d1/0x2d0 mm/filemap.c:222
 __remove_mapping+0x341/0x460 mm/vmscan.c:756
 remove_mapping+0x22/0x90 mm/vmscan.c:789
 mapping_evict_folio mm/truncate.c:281 [inline]
 mapping_try_invalidate+0x286/0x3d0 mm/truncate.c:520
 invalidate_mapping_pages+0x27/0x30 mm/truncate.c:558
 invalidate_bdev+0x65/0x70 block/bdev.c:87
 bdev_disk_changed+0x118/0xc70 block/partitions/core.c:664
 blkdev_get_whole+0x227/0x240 block/bdev.c:655
 blkdev_get_by_dev+0x236/0x390 block/bdev.c:797
 bdev_open_by_dev+0x56/0xd0 block/bdev.c:842
 disk_scan_partitions+0x13b/0x1a0 block/genhd.c:369
 blkdev_common_ioctl+0xd59/0x1680 block/ioctl.c:558
 blkdev_ioctl+0x318/0x460 block/ioctl.c:627
 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+0x44/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

read to 0xffff888100630570 of 8 bytes by task 9312 on cpu 1:
 nr_blockdev_pages+0x7c/0xd0 block/bdev.c:443
 si_meminfo+0x87/0xd0 mm/show_mem.c:80
 update_defense_level+0x46/0x600 net/netfilter/ipvs/ip_vs_ctl.c:101
 defense_work_handler+0x1f/0x80 net/netfilter/ipvs/ip_vs_ctl.c:235
 process_one_work kernel/workqueue.c:2627 [inline]
 process_scheduled_works+0x5b8/0xa30 kernel/workqueue.c:2700
 worker_thread+0x525/0x730 kernel/workqueue.c:2781
 kthread+0x1d7/0x210 kernel/kthread.c:388
 ret_from_fork+0x48/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242

value changed: 0x000000000000001e -> 0x000000000000001d

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 9312 Comm: kworker/1:15 Not tainted 6.7.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: events_long defense_work_handler
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