rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P7870/2:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=41085, q=769 ncpus=2)
task:syz-executor    state:R  running task     stack:22992 pid:7870  tgid:7870  ppid:7867   flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0xe37/0x5490 kernel/sched/core.c:6529
 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:6851
 irqentry_exit+0x36/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_is_held_type+0x107/0x150 kernel/locking/lockdep.c:5836
Code: 00 00 b8 ff ff ff ff 65 0f c1 05 bc 82 f1 74 83 f8 01 75 2d 9c 58 f6 c4 02 75 43 48 f7 04 24 00 02 00 00 74 01 fb 48 83 c4 08 <44> 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc 45 31 ed eb
RSP: 0018:ffffc900033c7b18 EFLAGS: 00000286
RAX: 0000000000000046 RBX: ffff888061d5c730 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8b4cc7c0 RDI: ffffffff8bb095c0
RBP: ffffffff8ddb5ba0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff888061d5bc00
R13: 0000000000000001 R14: 00000000ffffffff R15: 0000000000000002
 sidtab_sid2str_get+0x25a/0x680 security/selinux/ss/sidtab.c:619
 sidtab_entry_to_string+0x33/0x110 security/selinux/ss/services.c:1267
 security_sid_to_context_core+0x35c/0x640 security/selinux/ss/services.c:1370
 selinux_inode_init_security+0x465/0x670 security/selinux/hooks.c:2948
 security_inode_init_security+0x1a5/0x380 security/security.c:1728
 shmem_mknod+0xe9/0x240 mm/shmem.c:3433
 shmem_mkdir+0x31/0x60 mm/shmem.c:3487
 vfs_mkdir+0x57d/0x860 fs/namei.c:4210
 do_mkdirat+0x301/0x3a0 fs/namei.c:4233
 __do_sys_mkdirat fs/namei.c:4248 [inline]
 __se_sys_mkdirat fs/namei.c:4246 [inline]
 __x64_sys_mkdirat+0x83/0xb0 fs/namei.c:4246
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe155978717
RSP: 002b:00007ffc7f7421b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007ffc7f742200 RCX: 00007fe155978717
RDX: 00000000000001ff RSI: 00007ffc7f742200 RDI: 00000000ffffff9c
RBP: 00007ffc7f7421ec R08: 0000000000000003 R09: 00007ffc7f741f57
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000032
R13: 0000000000075e0a R14: 0000000000075c24 R15: 00007ffc7f742240
 </TASK>
rcu: rcu_preempt kthread starved for 10484 jiffies! g41085 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:27872 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0xe37/0x5490 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6621
 schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2034
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2236
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x1a/0x20 drivers/acpi/processor_idle.c:111