rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5206/1:b..l
rcu: 	(detected by 0, t=10503 jiffies, g=23697, q=739534 ncpus=2)
task:udevd           state:R  running task     stack:21696 pid:5206  tgid:5206  ppid:1      task_flags:0x400140 flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5373 [inline]
 __schedule+0x190e/0x4c90 kernel/sched/core.c:6760
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7082
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5855
Code: 2b 00 74 08 4c 89 f7 e8 3a 71 8c 00 f6 44 24 61 02 0f 85 85 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc900031b7440 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92000636e94 RCX: ffff888079bda8e8
RDX: dffffc0000000000 RSI: ffffffff8c2aaf60 RDI: ffffffff8c8156e0
RBP: ffffc900031b7588 R08: ffffffff9456b007 R09: 1ffffffff28ad600
R10: dffffc0000000000 R11: fffffbfff28ad601 R12: 1ffff92000636e90
R13: dffffc0000000000 R14: ffffc900031b74a0 R15: 0000000000000246
 rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 rcu_read_lock include/linux/rcupdate.h:841 [inline]
 page_ext_get+0x3d/0x2a0 mm/page_ext.c:525
 __reset_page_owner+0x30/0x430 mm/page_owner.c:290
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1205 [inline]
 free_frozen_pages+0xe0d/0x10e0 mm/page_alloc.c:2738
 discard_slab mm/slub.c:2698 [inline]
 __put_partials+0x160/0x1c0 mm/slub.c:3167
 put_cpu_partial+0x17c/0x250 mm/slub.c:3242
 __slab_free+0x290/0x380 mm/slub.c:4493
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4129 [inline]
 slab_alloc_node mm/slub.c:4178 [inline]
 __do_kmalloc_node mm/slub.c:4307 [inline]
 __kmalloc_noprof+0x236/0x4c0 mm/slub.c:4320
 kmalloc_noprof include/linux/slab.h:915 [inline]
 tomoyo_realpath_from_path+0xcf/0x5e0 security/tomoyo/realpath.c:251
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_perm+0x2c0/0x610 security/tomoyo/file.c:822
 security_inode_getattr+0x130/0x330 security/security.c:2377
 vfs_getattr fs/stat.c:243 [inline]
 vfs_statx_path+0x23/0x2b0 fs/stat.c:283
 vfs_statx+0x138/0x1f0 fs/stat.c:349
 vfs_fstatat+0xdc/0x150 fs/stat.c:368
 __do_sys_newfstatat fs/stat.c:532 [inline]
 __se_sys_newfstatat fs/stat.c:526 [inline]
 __x64_sys_newfstatat+0x11d/0x1a0 fs/stat.c:526
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8815d165f4
RSP: 002b:00007fff19002e38 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 0000557c631946e0 RCX: 00007f8815d165f4
RDX: 00007fff19002e48 RSI: 0000557c63184897 RDI: 00000000ffffff9c
RBP: 0000557c77eaec28 R08: 00062305ed946d00 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00062305ed946d00 R15: 0000557c63188dca
 </TASK>