rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=cb8c/1/0x4000000000000000 softirq=17214/17214 fqs=0
rcu: 	(detected by 1, t=10506 jiffies, g=17405, q=443 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 35 Comm: kworker/u9:1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:__lock_acquire+0xbf/0x2cf0
Code: 8b 44 c1 08 48 85 c0 75 21 31 ed 4c 89 cf 31 d2 4c 89 cb e8 63 f1 ff ff 48 85 c0 0f 84 76 13 00 00 49 89 d9 8b 0d f1 04 86 18 <48> 8b 54 24 08 8b 92 50 0b 00 00 85 c9 0f 94 c1 83 fa 30 40 0f 93
RSP: 0018:ffffc90000007ad0 EFLAGS: 00000082
RAX: ffffffff93c50410 RBX: 0000000000000046 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffffffff9a55b5d0
RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff9a55b5d0
R10: dffffc0000000000 R11: fffff52000000f98 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff88818de5d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000340 CR3: 0000000117cea000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 lock_acquire+0xf0/0x2e0
 _raw_spin_lock_irqsave+0x40/0x60
 debug_object_activate+0x83/0x580
 enqueue_hrtimer+0x30/0x3c0
 __hrtimer_run_queues+0x650/0xcc0
 hrtimer_interrupt+0x42b/0x1010
 __sysvec_apic_timer_interrupt+0x102/0x460
 sysvec_apic_timer_interrupt+0xa1/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:unwind_next_frame+0x18e1/0x23c0
Code: 24 48 01 c6 4c 89 f7 48 89 da e8 9a 0d 00 00 84 c0 0f 84 46 01 00 00 48 bd 00 00 00 00 00 fc ff df 48 8b 44 24 20 0f b6 04 28 <84> c0 0f 85 16 08 00 00 b3 01 8b 84 24 8c 00 00 00 41 39 06 4c 8b
RSP: 0018:ffffc90000ab74b8 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffffffff90b31d54 RCX: 0000000000000001
RDX: ffffc90000ab75c8 RSI: dffffc0000000000 RDI: ffffc90000ab7990
RBP: dffffc0000000000 R08: ffffc90000ab7990 R09: 0000000000000000
R10: ffffc90000ab75d8 R11: fffff52000156ebd R12: ffffc90000ab75d8
R13: 1ffff92000156eb3 R14: ffffc90000ab7588 R15: 1ffffffff21663aa
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_node_noprof+0x384/0x690
 __alloc_skb+0x1d0/0x7d0
 nsim_dev_trap_report_work+0x29a/0xb80
 process_scheduled_works+0xb6e/0x18c0
 worker_thread+0xa53/0xfc0
 kthread+0x388/0x470
 ret_from_fork+0x51e/0xb90
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: rcu_preempt kthread starved for 10506 jiffies! g17405 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:27744 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x15dd/0x52d0
 schedule+0x164/0x360
 schedule_timeout+0x158/0x2c0
 rcu_gp_fqs_loop+0x312/0x11d0
 rcu_gp_kthread+0x9e/0x2b0
 kthread+0x388/0x470
 ret_from_fork+0x51e/0xb90
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 6819 Comm: syz.2.182 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:smp_call_function_many_cond+0xcf6/0x12c0
Code: 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 5f e2 0b 00 eb 38 f3 90 42 0f b6 04 2b 84 c0 75 11 41 f7 04 24 01 00 00 00 <74> 1e e8 43 e2 0b 00 eb e4 44 89 e1 80 e1 07 80 c1 03 38 c1 7c e2
RSP: 0018:ffffc90003997980 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 1ffff11024208525 RCX: 0000000000080000
RDX: ffffc9000ab12000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc90003997ab0 R08: ffffffff9011b1b7 R09: 1ffffffff2023636
R10: dffffc0000000000 R11: ffffffff8173e7d0 R12: ffff888121042928
R13: dffffc0000000000 R14: ffff88823c63c000 R15: 0000000000000000
FS:  00007f152052a6c0(0000) GS:ffff8882a945d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f151f64f0d7 CR3: 000000010892e000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 clock_was_set+0x6ed/0x7a0
 do_adjtimex+0x25d/0x370
 __x64_sys_clock_adjtime+0x252/0x340
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f151f59ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f152052a028 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 00007f151f815fa0 RCX: 00007f151f59ce59
RDX: 0000000000000000 RSI: 0000200000000340 RDI: 0000000000000000
RBP: 00007f151f632d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f151f816038 R14: 00007f151f815fa0 R15: 00007ffdac77e4e8
 </TASK>
