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BUG: KCSAN: data-race in set_nlink / set_nlink

write to 0xffff8881065dc798 of 4 bytes by task 2774 on cpu 1:
 set_nlink+0x98/0xb0 fs/inode.c:373
 kernfs_refresh_inode fs/kernfs/inode.c:180 [inline]
 kernfs_iop_permission+0x1dd/0x220 fs/kernfs/inode.c:288
 do_inode_permission fs/namei.c:462 [inline]
 inode_permission+0x18c/0x300 fs/namei.c:529
 may_lookup fs/namei.c:1727 [inline]
 link_path_walk+0x1b8/0x810 fs/namei.c:2274
 path_openat+0x1a1/0x1d60 fs/namei.c:3796
 do_filp_open+0xf7/0x200 fs/namei.c:3827
 do_sys_openat2+0xab/0x120 fs/open.c:1407
 do_sys_open fs/open.c:1422 [inline]
 __do_sys_openat fs/open.c:1438 [inline]
 __se_sys_openat fs/open.c:1433 [inline]
 __x64_sys_openat+0xf3/0x120 fs/open.c:1433
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

read to 0xffff8881065dc798 of 4 bytes by task 15867 on cpu 0:
 set_nlink+0x2b/0xb0
 kernfs_refresh_inode fs/kernfs/inode.c:180 [inline]
 kernfs_iop_permission+0x1dd/0x220 fs/kernfs/inode.c:288
 do_inode_permission fs/namei.c:462 [inline]
 inode_permission+0x18c/0x300 fs/namei.c:529
 may_lookup fs/namei.c:1727 [inline]
 link_path_walk+0x1b8/0x810 fs/namei.c:2274
 path_openat+0x1a1/0x1d60 fs/namei.c:3796
 do_filp_open+0xf7/0x200 fs/namei.c:3827
 do_sys_openat2+0xab/0x120 fs/open.c:1407
 do_sys_open fs/open.c:1422 [inline]
 __do_sys_openat fs/open.c:1438 [inline]
 __se_sys_openat fs/open.c:1433 [inline]
 __x64_sys_openat+0xf3/0x120 fs/open.c:1433
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

value changed: 0x00000004 -> 0x00000003

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 15867 Comm: udevd Not tainted 6.8.0-syzkaller-01185-g855684c7d938 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
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