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BUG: KCSAN: data-race in __filemap_add_folio / nr_blockdev_pages

read-write to 0xffff8881004055c8 of 8 bytes by task 1435 on cpu 1:
 __filemap_add_folio+0x4e9/0x990 mm/filemap.c:898
 filemap_add_folio+0x6b/0x150 mm/filemap.c:933
 do_read_cache_folio+0x167/0x3f0 mm/filemap.c:3486
 read_cache_folio+0x36/0x40 mm/filemap.c:3551
 read_mapping_folio include/linux/pagemap.h:762 [inline]
 read_part_sector+0x76/0x1e0 block/partitions/core.c:714
 read_lba block/partitions/efi.c:248 [inline]
 find_valid_gpt block/partitions/efi.c:603 [inline]
 efi_partition+0x23b/0x1240 block/partitions/efi.c:720
 check_partition block/partitions/core.c:146 [inline]
 blk_add_partitions block/partitions/core.c:599 [inline]
 bdev_disk_changed+0x3c5/0xc30 block/partitions/core.c:685
 blkdev_get_whole block/bdev.c:684 [inline]
 blkdev_get_by_dev+0x3c9/0x9d0 block/bdev.c:821
 blkdev_open+0xac/0x140 block/fops.c:485
 do_dentry_open+0x51a/0x8b0 fs/open.c:878
 vfs_open+0x43/0x50 fs/open.c:1014
 do_open fs/namei.c:3499 [inline]
 path_openat+0x1671/0x1ad0 fs/namei.c:3632
 do_filp_open+0x105/0x220 fs/namei.c:3659
 do_sys_openat2+0xb5/0x2a0 fs/open.c:1311
 do_sys_open fs/open.c:1327 [inline]
 __do_sys_openat fs/open.c:1343 [inline]
 __se_sys_openat fs/open.c:1338 [inline]
 __x64_sys_openat+0xef/0x110 fs/open.c:1338
 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+0x63/0xcd

read to 0xffff8881004055c8 of 8 bytes by task 1909 on cpu 0:
 nr_blockdev_pages+0x7f/0xd0 block/bdev.c:522
 si_meminfo+0x3a/0x60 mm/page_alloc.c:5924
 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: 0x0000000000000000 -> 0x0000000000000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 1909 Comm: kworker/0:4 Not tainted 5.19.0-syzkaller-12567-g1612c382ffbd-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Workqueue: events_long defense_work_handler
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