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BUG: KCSAN: data-race in kernfs_iop_permission / kernfs_link_sibling

read-write to 0xffff888100ce83c0 of 8 bytes by task 23619 on cpu 1:
 kernfs_link_sibling+0x1e7/0x230 fs/kernfs/dir.c:387
 kernfs_add_one+0x260/0x390 fs/kernfs/dir.c:770
 kernfs_create_dir_ns+0x100/0x150 fs/kernfs/dir.c:1046
 sysfs_create_dir_ns+0xd7/0x1d0 fs/sysfs/dir.c:59
 create_dir lib/kobject.c:65 [inline]
 kobject_add_internal+0x47b/0x780 lib/kobject.c:233
 kobject_add_varg lib/kobject.c:367 [inline]
 kobject_add+0xdc/0x150 lib/kobject.c:419
 device_add+0x2ff/0xab0 drivers/base/core.c:3563
 device_create_groups_vargs drivers/base/core.c:4302 [inline]
 device_create+0x181/0x1d0 drivers/base/core.c:4341
 vcs_make_sysfs+0xa1/0xb0 drivers/tty/vt/vc_screen.c:797
 vc_allocate+0x402/0x430 drivers/tty/vt/vt.c:1107
 con_install+0x36/0x2d0 drivers/tty/vt/vt.c:3333
 tty_driver_install_tty drivers/tty/tty_io.c:1312 [inline]
 tty_init_dev+0x7a/0x320 drivers/tty/tty_io.c:1424
 tty_open_by_driver drivers/tty/tty_io.c:2090 [inline]
 tty_open+0x6c9/0xb00 drivers/tty/tty_io.c:2137
 chrdev_open+0x34f/0x3c0 fs/char_dev.c:414
 do_dentry_open+0x5cd/0xaf0 fs/open.c:914
 vfs_open+0x4a/0x50 fs/open.c:1048
 do_open fs/namei.c:3636 [inline]
 path_openat+0x17f2/0x1d10 fs/namei.c:3793
 do_filp_open+0xf6/0x200 fs/namei.c:3820
 do_sys_openat2+0xab/0x110 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_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 0xffff888100ce83c0 of 8 bytes by task 23590 on cpu 0:
 kernfs_refresh_inode fs/kernfs/inode.c:181 [inline]
 kernfs_iop_permission+0x165/0x1b0 fs/kernfs/inode.c:289
 do_inode_permission fs/namei.c:461 [inline]
 inode_permission+0x184/0x300 fs/namei.c:528
 may_lookup fs/namei.c:1720 [inline]
 link_path_walk+0x19e/0x7e0 fs/namei.c:2267
 path_openat+0x1a1/0x1d10 fs/namei.c:3789
 do_filp_open+0xf6/0x200 fs/namei.c:3820
 do_sys_openat2+0xab/0x110 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_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

value changed: 0x0000000000000011 -> 0x0000000000000012

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 23590 Comm: udevd Not tainted 6.5.0-rc2-syzkaller-00338-g295e1388de2d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
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