rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5643/1:b..l
rcu: 	(detected by 1, t=10503 jiffies, g=49569, q=1112480 ncpus=2)
task:syz-executor    state:R  running task     stack:21888 pid:5643  tgid:5643  ppid:5624   task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1821/0x5740 kernel/sched/core.c:7189
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7513
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x14f/0x760 kernel/entry/common.c:164
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:deref_stack_reg+0x1a7/0x230 arch/x86/kernel/unwind_orc.c:422
Code: 46 49 8d 40 08 48 39 d8 0f 97 c1 4c 39 f0 0f 96 c0 20 c8 3c 01 75 30 4c 89 c7 49 89 f7 e8 11 08 00 00 49 89 c6 48 8b 5c 24 18 <48> 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 e3 eb b9 00
RSP: 0018:ffffc9000396f3c0 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffffc9000396f528 RCX: 0000000000000001
RDX: ffffc9000396f528 RSI: dffffc0000000000 RDI: ffffc9000396f760
RBP: 1ffff9200072de9d R08: ffffc9000396f760 R09: 0000000000000000
R10: ffffc9000396f538 R11: fffff5200072dea9 R12: 1ffff9200072de9e
R13: 1ffff9200072de9f R14: 0000000000000000 R15: dffffc0000000000
 unwind_next_frame+0x19d5/0x2550 arch/x86/kernel/unwind_orc.c:-1
 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 save_stack+0x122/0x230 mm/page_owner.c:165
 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:320
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1402 [inline]
 __free_frozen_pages+0xbc7/0xd30 mm/page_alloc.c:2943
 __slab_free+0x274/0x2c0 mm/slub.c:5613
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4570 [inline]
 slab_alloc_node mm/slub.c:4899 [inline]
 __do_kmalloc_node mm/slub.c:5295 [inline]
 __kmalloc_noprof+0x316/0x760 mm/slub.c:5308
 kmalloc_noprof include/linux/slab.h:954 [inline]
 kzalloc_noprof include/linux/slab.h:1188 [inline]
 tomoyo_encode2 security/tomoyo/realpath.c:45 [inline]
 tomoyo_encode+0x28b/0x550 security/tomoyo/realpath.c:80
 tomoyo_realpath_from_path+0x58d/0x5d0 security/tomoyo/realpath.c:283
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_perm+0x283/0x560 security/tomoyo/file.c:827
 tomoyo_path_unlink+0xaa/0xf0 security/tomoyo/tomoyo.c:162
 security_path_unlink+0x15f/0x330 security/security.c:1483
 filename_unlinkat+0x349/0x610 fs/namei.c:5565
 __do_sys_unlink fs/namei.c:5603 [inline]
 __se_sys_unlink+0x2e/0x140 fs/namei.c:5600
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb53559bf47
RSP: 002b:00007fb53593ecb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb53559bf47
RDX: 00007fb53593ece0 RSI: 00007fb53593ed70 RDI: 00007fb53593ed70
RBP: 00007fb53593ed70 R08: 00007fb53593fd70 R09: 00000000ffffffff
R10: 0000000000000100 R11: 0000000000000206 R12: 00007fb53593fe00
R13: 00007fb5356321ca R14: 000000000004b966 R15: 00007fb53593fe40
 </TASK>