rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=9c8c/1/0x4000000000000000 softirq=281409/281409 fqs=0
rcu: 	(detected by 0, t=10506 jiffies, g=329921, q=187 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 27177 Comm: udevd Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__lock_acquire+0x6a5/0x2cf0
Code: 08 4c 89 ee ba 04 00 00 00 e8 87 44 00 00 85 c0 0f 84 99 0d 00 00 41 8b 45 20 a9 00 00 18 00 0f 84 bc 00 00 00 4c 8b 74 24 08 <4c> 89 f7 4c 89 ee ba 08 00 00 00 e8 5b 44 00 00 31 ed 85 c0 0f 84
RSP: 0018:ffffc90000a08920 EFLAGS: 00000006
RAX: 00000000000c7247 RBX: 0000000000000002 RCX: ffffffff93ef8ae8
RDX: 0000000000000004 RSI: ffff88810d574760 RDI: ffff88810d573b80
RBP: 0000000000000000 R08: ffffffff89b7aff4 R09: ffff8881a31f42c0
R10: dffffc0000000000 R11: ffffffff89b7af40 R12: 0000000000000003
R13: ffff88810d574760 R14: ffff88810d573b80 R15: 0000000000000001
FS:  00007f711bda3c80(0000) GS:ffff8882a9299000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b34721ff8 CR3: 000000010dfc8000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 lock_acquire+0x106/0x350
 _raw_spin_lock+0x2e/0x40
 advance_sched+0xb4/0xc20
 __hrtimer_run_queues+0x3c0/0xa20
 hrtimer_interrupt+0x44b/0x950
 __sysvec_apic_timer_interrupt+0x102/0x430
 sysvec_apic_timer_interrupt+0x52/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x8/0x90
Code: 89 44 11 20 e9 59 3f e5 09 cc 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 15 58 b3 72 11 65 8b 0d 79 b3 72 11 81 e1 00 01 ff 00 74
RSP: 0018:ffffc90000a08ec8 EFLAGS: 00000246
RAX: ffffffff89800bf1 RBX: 0000000000000000 RCX: ffff88810d573b80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8881a31f4198 R08: ffffffff90303ef7 R09: 1ffffffff20607de
R10: dffffc0000000000 R11: fffffbfff20607df R12: ffff8881a31f4010
R13: 1ffff1103463e802 R14: ffff8881a31f41b0 R15: ffff8881a31f4000
 net_tx_action+0x831/0xc30
 handle_softirqs+0x22a/0x840
 __irq_exit_rcu+0xca/0x220
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:lock_is_held_type+0x106/0x150
Code: 1a 00 00 b8 ff ff ff ff 65 0f c1 05 f4 ac 90 07 83 f8 01 75 25 9c 58 a9 00 02 00 00 75 39 41 f7 c4 00 02 00 00 74 01 fb 89 d8 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 90 0f 0b 90 48 c7
RSP: 0018:ffffc9000ab0fd68 EFLAGS: 00000206
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 0000000000000000 RSI: ffffffff8e21a26c RDI: ffffffff8c28cb60
RBP: 00000000ffffffff R08: 00000000ffffffff R09: 0000000000000000
R10: ffff8881a911a400 R11: ffffffff81b0e2a0 R12: 0000000000000246
R13: ffff88810d573b80 R14: ffffffff8e95cda0 R15: 0000000000000000
 __might_resched+0x86/0x4d0
 __might_fault+0x76/0x130
 strncpy_from_user+0x31/0x2b0
 do_getname+0x77/0x250
 __se_sys_rename+0x2b/0x2c0
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f711b89a93b
Code: 48 8b 15 f0 64 15 00 83 c8 ff 64 83 3a 15 75 0e 48 8b 7c 24 08 e8 d5 d4 07 00 f7 d8 19 c0 48 83 c4 18 c3 b8 52 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 10 48 8b 15 be 64 15 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffcbc9b6738 EFLAGS: 00000202 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f711b89a93b
RDX: 000055ad5da2a9fe RSI: 00007ffcbc9b6758 RDI: 00007ffcbc9b6b58
RBP: 000055a80722e780 R08: 0000000000000006 R09: 54c14b77c89279ce
R10: 00000000000001b6 R11: 0000000000000202 R12: 000055a80723ee60
R13: 00007ffcbc9b6758 R14: 00007ffcbc9b6b58 R15: 000055a7e9665160
 </TASK>
rcu: rcu_preempt kthread starved for 10506 jiffies! g329921 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:27536 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x1821/0x5740
 schedule+0x164/0x360
 schedule_timeout+0x158/0x2c0
 rcu_gp_fqs_loop+0x312/0x11d0
 rcu_gp_kthread+0x9e/0x2b0
 kthread+0x389/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 25805 Comm: kworker/u9:25 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70
Code: 8b 3d b4 a7 60 0c 48 89 de 5b e9 33 39 60 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0d 98 b7 72 11 65 8b 15 b9 b7 72 11 81 e2 00 01 ff 00 74
RSP: 0018:ffffc900041276f8 EFLAGS: 00000202
RAX: ffffffff81b9b536 RBX: ffff88812103c308 RCX: ffff88802244d940
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90004127840 R08: ffffffff90303ef7 R09: 1ffffffff20607de
R10: dffffc0000000000 R11: fffffbfff20607df R12: 1ffff110478c81a9
R13: dffffc0000000000 R14: ffff88823c640d48 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff88818dc99000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000000 CR3: 000000000e74a000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 smp_call_function_many_cond+0xfe6/0x13d0
 on_each_cpu_cond_mask+0x3f/0x80
 smp_text_poke_batch_finish+0xec2/0x1160
 arch_jump_label_transform_apply+0x1c/0x30
 static_key_enable_cpuslocked+0x128/0x240
 static_key_enable+0x1a/0x20
 toggle_allocation_gate+0xab/0x290
 process_scheduled_works+0xb5d/0x1860
 worker_thread+0xa53/0xfc0
 kthread+0x389/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
