rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 GPs behind) idle=6234/1/0x4000000000000000 softirq=78386/78387 fqs=3
rcu: 	(detected by 1, t=10502 jiffies, g=83113, q=261 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 16040 Comm: dhcpcd-run-hook 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:mark_lock+0xa6/0x190
Code: 0e 48 c7 c6 13 6b 35 8e 67 48 0f b9 3a 90 31 c9 4c 89 fe 4c 89 f7 b8 01 00 00 00 85 69 60 74 10 5b 41 5c 41 5d 41 5e 41 5f 5d <e9> 05 95 31 0a cc 49 89 fe 49 89 f7 e8 c9 90 ff ff 89 c1 31 c0 85
RSP: 0018:ffffc90000007988 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff9422e018
RDX: 0000000000000004 RSI: ffff8881ba77a9a8 RDI: ffff8881ba779e00
RBP: 0000000000000000 R08: 1800000000000000 R09: 0000000000080000
R10: 0000000000000000 R11: ffff888104e952c0 R12: ffffffffffffff03
R13: 0000000000000000 R14: ffff8881ba77a9a8 R15: 0000000000000000
FS:  00007f889274c380(0000) GS:ffff88818d94d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055c8fbac3048 CR3: 000000019e400000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 __lock_acquire+0x6b7/0x2e50
 lock_acquire+0x115/0x350
 _raw_spin_lock+0x2e/0x40
 advance_sched+0xc2/0xc80
 __hrtimer_run_queues+0x3bc/0xa10
 hrtimer_interrupt+0x448/0x910
 __sysvec_apic_timer_interrupt+0x102/0x430
 sysvec_apic_timer_interrupt+0x52/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:handle_softirqs+0x15b/0x840
Code: 89 6c 24 20 0f b7 db 48 c7 c7 e0 30 eb 8b e8 cc 34 49 0a 65 66 c7 05 da b1 e4 11 00 00 e8 ed b9 46 00 fb 48 c7 c5 c0 a0 80 8e <b8> ff ff ff ff 0f bc c3 41 89 c4 41 ff c4 0f 84 09 04 00 00 89 5c
RSP: 0018:ffffc90000007f30 EFLAGS: 00000202
RAX: 000000000000059e RBX: 0000000000000004 RCX: 0000000080000100
RDX: 0000000000000000 RSI: ffffffff8e22dd4d RDI: ffffffff8c4be180
RBP: ffffffff8e80a0c0 R08: ffffffff90578e37 R09: 1ffffffff20af1c6
R10: dffffc0000000000 R11: fffffbfff20af1c7 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8881ba779e00 R15: dffffc0000000000
 __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:init_file+0x1d/0x2b0
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41 56 41 55 41 54 53 49 89 d7 41 89 f6 48 89 fb 48 bd 00 00 00 00 00 fc ff df <e8> 7e b2 7e ff 4d 85 ff 74 3e e8 74 b2 7e ff 49 8d bf a8 00 00 00
RSP: 0018:ffffc90008797968 EFLAGS: 00000286
RAX: ffff88811304de00 RBX: ffff88811304de00 RCX: 0000000080000001
RDX: ffff888166b39b00 RSI: 0000000000008020 RDI: ffff88811304de00
RBP: dffffc0000000000 R08: 00000000ffffffff R09: 1ffff920010f2ef8
R10: dffffc0000000000 R11: fffff520010f2ef9 R12: ffffc90008797ba0
R13: dffffc0000000000 R14: 0000000000008020 R15: ffff888166b39b00
 alloc_empty_file+0x74/0x1d0
 path_openat+0x8f/0x3830
 do_file_open+0x23e/0x4a0
 do_open_execat+0x12b/0x590
 alloc_bprm+0x24/0x640
 do_execveat_common+0x172/0x670
 __x64_sys_execve+0x97/0xc0
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8892886ef7
Code: ba 0f 00 5b 5d 41 5c 41 5d 41 5e 41 5f e9 63 d8 fb ff 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 66 90 b8 3b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 01 3f 0f 00 f7 d8 64 89 01 48
RSP: 002b:00007fff46cf1618 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 000055c8fbac3020 RCX: 00007f8892886ef7
RDX: 000055c8fbac3048 RSI: 000055c8fbac3020 RDI: 000055c8fbac30d0
RBP: 000055c8fbac30d0 R08: fefefefefefefeff R09: fefefefeff6f6c62
R10: 0000000092861b01 R11: 0000000000000246 R12: 000055c8fbac3048
R13: 00007f8892a34904 R14: 000055c8fbac3048 R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread starved for 10496 jiffies! g83113 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:27736 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x17d9/0x56c0
 schedule+0x164/0x2b0
 schedule_timeout+0x152/0x2c0
 rcu_gp_fqs_loop+0x30c/0x11f0
 rcu_gp_kthread+0x9e/0x2b0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 9339 Comm: kworker/u10:56 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:smp_call_function_many_cond+0x11ef/0x15f0
Code: e6 01 31 ff e8 42 21 0c 00 83 e3 01 48 bb 00 00 00 00 00 fc ff df 75 07 e8 ee 1c 0c 00 eb 37 f3 90 41 0f b6 04 1c 84 c0 75 10 <41> f7 06 01 00 00 00 74 1e e8 d3 1c 0c 00 eb e5 44 89 f1 80 e1 07
RSP: 0018:ffffc90003cef700 EFLAGS: 00000246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff88819e319e00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90003cef860 R08: ffffffff90578e37 R09: 1ffffffff20af1c6
R10: dffffc0000000000 R11: fffffbfff20af1c7 R12: 1ffff110242085fd
R13: ffff88823c63c448 R14: ffff888121042fe8 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8882a8f4d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f91d1deb700 CR3: 000000000e946000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80
 smp_text_poke_batch_finish+0x5fd/0x1110
 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+0xa8e/0x14e0
 worker_thread+0xa47/0xfb0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
