BUG: KCSAN: data-race in __filemap_add_folio / nr_blockdev_pages read-write to 0xffff8881020a0be0 of 8 bytes by task 9661 on cpu 1: __filemap_add_folio+0x385/0x730 mm/filemap.c:907 filemap_add_folio+0x6f/0x150 mm/filemap.c:942 __filemap_get_folio+0x313/0x500 mm/filemap.c:1944 grow_dev_page fs/buffer.c:1063 [inline] grow_buffers fs/buffer.c:1123 [inline] __getblk_slow fs/buffer.c:1150 [inline] __getblk_gfp+0x19b/0x710 fs/buffer.c:1445 sb_getblk include/linux/buffer_head.h:369 [inline] __ext4_get_inode_loc+0x2cc/0x8d0 fs/ext4/inode.c:4350 __ext4_get_inode_loc_noinmem fs/ext4/inode.c:4463 [inline] __ext4_iget+0x30b/0x1e10 fs/ext4/inode.c:4685 __ext4_fill_super fs/ext4/super.c:5467 [inline] ext4_fill_super+0x2e65/0x38b0 fs/ext4/super.c:5696 get_tree_bdev+0x2b4/0x3b0 fs/super.c:1318 ext4_get_tree+0x1c/0x20 fs/ext4/super.c:5728 vfs_get_tree+0x51/0x190 fs/super.c:1519 do_new_mount+0x203/0x660 fs/namespace.c:3335 path_mount+0x496/0xb30 fs/namespace.c:3662 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount+0x27f/0x2d0 fs/namespace.c:3861 __x64_sys_mount+0x67/0x80 fs/namespace.c:3861 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 0xffff8881020a0be0 of 8 bytes by task 11733 on cpu 0: 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:2597 worker_thread+0x5f2/0xa10 kernel/workqueue.c:2748 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: 0x0000000000000001 -> 0x0000000000000002 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 11733 Comm: kworker/0:2 Not tainted 6.5.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 Workqueue: events_long defense_work_handler ==================================================================