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BUG: KCSAN: data-race in set_nlink / set_nlink

read to 0xffff8881056c9b18 of 4 bytes by task 2773 on cpu 1:
 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+0x184/0x300 fs/namei.c:529
 may_lookup fs/namei.c:1727 [inline]
 link_path_walk+0x1b8/0x800 fs/namei.c:2274
 path_openat+0x1a0/0x1d40 fs/namei.c:3798
 do_filp_open+0xf6/0x200 fs/namei.c:3829
 do_sys_openat2+0xab/0x110 fs/open.c:1404
 do_sys_open fs/open.c:1419 [inline]
 __do_sys_openat fs/open.c:1435 [inline]
 __se_sys_openat fs/open.c:1430 [inline]
 __x64_sys_openat+0xf3/0x120 fs/open.c:1430
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

write to 0xffff8881056c9b18 of 4 bytes by task 3075 on cpu 0:
 set_nlink+0x98/0xb0 fs/inode.c:372
 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+0x184/0x300 fs/namei.c:529
 may_lookup fs/namei.c:1727 [inline]
 link_path_walk+0x1b8/0x800 fs/namei.c:2274
 path_openat+0x1a0/0x1d40 fs/namei.c:3798
 do_filp_open+0xf6/0x200 fs/namei.c:3829
 do_sys_openat2+0xab/0x110 fs/open.c:1404
 do_sys_open fs/open.c:1419 [inline]
 __do_sys_openat fs/open.c:1435 [inline]
 __se_sys_openat fs/open.c:1430 [inline]
 __x64_sys_openat+0xf3/0x120 fs/open.c:1430
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0x00000006 -> 0x00000005

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 3075 Comm: udevd Not tainted 6.8.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
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