rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=a2dc/1/0x4000000000000000 softirq=55274/55274 fqs=0
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P15409/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=50669, q=148 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 15410 Comm: syz.0.3000 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:kasan_check_range+0x6b/0x2c0
Code: 00 ff f3 0f 1e fa 4c 39 cf 0f 82 58 02 00 00 49 89 ff 49 c1 ef 03 49 ba 00 00 00 00 00 fc ff df 4f 8d 1c 17 49 ff c8 4d 89 c1 <49> c1 e9 03 48 bb 01 00 00 00 00 fc ff df 4d 8d 34 19 4d 89 f4 4d
RSP: 0018:ffffc900001e0788 EFLAGS: 00000082
RAX: 00000000ffffff01 RBX: ffff888136627a80 RCX: ffffffff819e14a2
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff888136627a80
RBP: ffffc900001e0870 R08: ffff888136627a83 R09: ffff888136627a83
R10: dffffc0000000000 R11: ffffed1026cc4f50 R12: ffff888136627a90
R13: ffff888136627a88 R14: 1ffff11026cc4f52 R15: 1ffff11026cc4f50
FS:  00007f719aa5a6c0(0000) GS:ffff8881a3c12000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f719a9f7d58 CR3: 000000010ffea000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 do_raw_spin_lock+0x112/0x290
 _raw_spin_lock_irqsave+0xb3/0xf0
 hrtimer_try_to_cancel+0x22b/0x420
 hrtimer_cancel+0x3b/0x50
 cpu_clock_event_stop+0xd9/0x130
 __perf_event_overflow+0x580/0xe40
 perf_swevent_hrtimer+0x3c5/0x550
 __hrtimer_run_queues+0x4e0/0xc60
 hrtimer_interrupt+0x45b/0xaa0
 __sysvec_apic_timer_interrupt+0x10b/0x410
 sysvec_apic_timer_interrupt+0xa1/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 1a 21 20 f6 48 89 df e8 72 b8 20 f6 e8 6d 0b 4a f6 fb bf 01 00 00 00 <e8> 42 b0 12 f6 65 8b 05 cb 80 23 07 85 c0 74 07 5b c3 cc cc cc cc
RSP: 0018:ffffc90002a4fbb8 EFLAGS: 00000286
RAX: 30df677539172100 RBX: ffff88812435dc00 RCX: 30df677539172100
RDX: 0000000000000006 RSI: ffffffff8d9baa25 RDI: 0000000000000001
RBP: 0000000000000001 R08: ffffffff8fa3b237 R09: 1ffffffff1f47646
R10: dffffc0000000000 R11: fffffbfff1f47647 R12: ffff888032476ae8
R13: dffffc0000000000 R14: ffff88812435dc00 R15: 1ffff1100648ed5d
 _perf_event_refresh+0x107/0x250
 perf_ioctl+0x5e5/0x1ec0
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7199b8ec29
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f719aa5a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f7199dd5fa0 RCX: 00007f7199b8ec29
RDX: 0000000000000002 RSI: 0000000000002402 RDI: 0000000000000005
RBP: 00007f7199c11e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7199dd6038 R14: 00007f7199dd5fa0 R15: 00007ffd6ed6c288
 </TASK>
task:syz.0.3000      state:R  running task     stack:24264 pid:15409 tgid:15409 ppid:5856   task_flags:0x400040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:lock_acquire+0x175/0x360
Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 7b 6f 03 11 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc900044bf480 EFLAGS: 00000206
RAX: b89abfb6d2ba1e00 RBX: 0000000000000000 RCX: b89abfb6d2ba1e00
RDX: 0000000000000001 RSI: ffffffff8dbaa0c3 RDI: ffffffff8be34280
RBP: ffffffff8240fd4d R08: 0000000000000000 R09: ffffffff8240fd4d
R10: dffffc0000000000 R11: ffffed10206b1b36 R12: 0000000000000002
R13: ffffffff8e13a120 R14: 0000000000000000 R15: 0000000000000246
 stash_dentry+0x9a/0x2f0
 path_from_stashed+0x48f/0x5c0
 perf_event_namespaces+0x534/0x920
 perf_event_fork+0x152/0x7d0
 copy_process+0x386a/0x3c00
 kernel_clone+0x21e/0x840
 __se_sys_clone3+0x256/0x2d0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7199bc3489
RSP: 002b:00007ffd6ed6c158 EFLAGS: 00000202 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007f7199b45880 RCX: 00007f7199bc3489
RDX: 00007f7199b45880 RSI: 0000000000000058 RDI: 00007ffd6ed6c1a0
RBP: 00007f719a9f76c0 R08: 00007f719a9f76c0 R09: 00007ffd6ed6c287
R10: 0000000000000008 R11: 0000000000000202 R12: ffffffffffffffa8
R13: 000000000000000b R14: 00007ffd6ed6c1a0 R15: 00007ffd6ed6c288
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g50669 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=24323
rcu: rcu_preempt kthread starved for 10502 jiffies! g50669 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27160 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_timeout+0x12b/0x270
 rcu_gp_fqs_loop+0x301/0x1540
 rcu_gp_kthread+0x99/0x390
 kthread+0x711/0x8a0
 ret_from_fork+0x439/0x7d0
 ret_from_fork_asm+0x1a/0x30
 </TASK>
