rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=67dc/1/0x4000000000000000 softirq=31292/31292 fqs=14
rcu: 	(detected by 0, t=10502 jiffies, g=23337, q=276 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 8909 Comm: syz.3.892 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:lock_acquire+0xe7/0x360
Code: 00 00 48 c7 44 24 30 00 00 00 00 9c 8f 44 24 30 4c 89 74 24 10 4d 89 fe 4c 8b 7c 24 30 fa 48 c7 c7 8e dc 9c 8d e8 69 02 dd 09 <65> ff 05 12 a0 03 11 45 31 c9 4c 89 7c 24 08 41 f7 c7 00 02 00 00
RSP: 0018:ffffc900001e07e0 EFLAGS: 00000086
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0b90a94137683400
RDX: 0000000000000000 RSI: ffffffff8d9cdc8e RDI: ffffffff8be33e00
RBP: ffffffff81ada78b R08: 0000000000000000 R09: 0000000000000001
R10: dffffc0000000000 R11: ffffed1026cc4f51 R12: 0000000000000000
R13: ffff888136627a98 R14: 0000000000000001 R15: 0000000000000046
FS:  00007ff6555586c0(0000) GS:ffff8881a3c13000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c36a63d CR3: 000000012a008000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 _raw_spin_lock_irqsave+0xa7/0xf0
 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:strcmp+0x31/0xc0
Code: 41 56 41 54 53 48 bb 00 00 00 00 00 fc ff df 45 31 f6 4a 8d 04 37 48 89 c1 48 c1 e9 03 0f b6 0c 19 84 c9 75 2c 42 0f b6 2c 37 <4a> 8d 04 36 48 89 c1 48 c1 e9 03 0f b6 0c 19 84 c9 75 33 42 0f b6
RSP: 0018:ffffc9000667fb28 EFLAGS: 00000246
RAX: ffffffff8dcafc80 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffffc90028e22000 RSI: ffffc9000667fc00 RDI: ffffffff8dcafc80
RBP: 000000000000006b R08: ffffc9000667fc7e R09: 1ffff92000ccff8f
R10: dffffc0000000000 R11: fffff52000ccff90 R12: ffffffff8f8dac80
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff8fa14500
 bpf_get_raw_tracepoint+0x76/0x270
 bpf_raw_tp_link_attach+0x20e/0x6c0
 bpf_raw_tracepoint_open+0x1b2/0x220
 __sys_bpf+0x75a/0x870
 __x64_sys_bpf+0x7c/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff65478eba9
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:00007ff655558038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007ff6549d5fa0 RCX: 00007ff65478eba9
RDX: 0000000000000010 RSI: 0000200000000180 RDI: 0000000000000011
RBP: 00007ff654811e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff6549d6038 R14: 00007ff6549d5fa0 R15: 00007ffdcfaf4108
 </TASK>
rcu: rcu_preempt kthread starved for 10430 jiffies! g23337 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:26920 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>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 8908 Comm: syz.3.892 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:its_return_thunk+0x0/0x10
Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc <c3> cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 e9 6b 32 b6 f5 cc
RSP: 0018:ffffc900066bfa38 EFLAGS: 00000293
RAX: ffffffff81b44b4f RBX: ffffc900066bfa88 RCX: ffff888022c73980
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900066bfb30 R08: ffffc900066bf8e7 R09: 1ffff92000cd7f1c
R10: dffffc0000000000 R11: fffff52000cd7f1d R12: 1ffff92000cd7f51
R13: dffffc0000000000 R14: 1ffff92000cd7f4c R15: 1ffff92000cd7f4c
FS:  0000555580ad8500(0000) GS:ffff8880b8613000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3a5975 CR3: 000000012a008000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000082
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 smp_call_function_single+0x3bf/0x590
 event_function_call+0x326/0x970
 perf_event_release_kernel+0x15d/0x510
 perf_release+0x38/0x50
 __fput+0x44c/0xa70
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xec/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff65478eba9
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:00007ffdcfaf4268 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007ff6549d7da0 RCX: 00007ff65478eba9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007ff6549d7da0 R08: 0000000000000220 R09: 0000001ecfaf455f
R10: 00007ff6549d7cb0 R11: 0000000000000246 R12: 0000000000029144
R13: 00007ff6549d6180 R14: ffffffffffffffff R15: 00007ffdcfaf4380
 </TASK>
