rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10506 jiffies, g=11293, q=366 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10506 (4294957733-4294947227), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread timer wakeup didn't happen for 10505 jiffies! g11293 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x200
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=4987
rcu: rcu_preempt kthread starved for 10506 jiffies! g11293 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x200 ->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 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>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6594 Comm: syz.1.201 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:trace_call_bpf+0x5dd/0x850
Code: 90 8b e8 26 65 af 09 65 ff 0d 6f c7 d6 10 48 c7 44 24 60 0e 36 e0 45 48 b8 00 00 00 00 00 fc ff df 49 c7 44 05 00 00 00 00 00 <65> 48 8b 05 9b b2 d5 10 48 3b 84 24 a0 00 00 00 0f 85 4c 02 00 00
RSP: 0018:ffffc900001e0560 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 47e3ce04bafbc200
RDX: 0000000000000001 RSI: ffffffff8b9060e0 RDI: ffffffff8be33e00
RBP: ffffc900001e0658 R08: ffffc900001e05ef R09: 0000000000000000
R10: ffffc900001e05e0 R11: ffffffffa0000808 R12: 00000000000000bf
R13: 1ffff9200003c0b8 R14: ffffffff81cb1857 R15: 0000000000000001
FS:  00007feae718d6c0(0000) GS:ffff8881a3c13000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000361d2000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 perf_trace_run_bpf_submit+0x78/0x170
 perf_trace_lock_acquire+0x335/0x410
 lock_acquire+0x311/0x360
 _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:finish_task_switch+0x26b/0x950
Code: 0f 84 3c 01 00 00 48 85 db 0f 85 63 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 df d4 eb 09 e8 8a 41 36 00 fb 4c 8b 65 c0 <49> 8d bc 24 18 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc900073270d8 EFLAGS: 00000286
RAX: 47e3ce04bafbc200 RBX: 0000000000000000 RCX: 47e3ce04bafbc200
RDX: 0000000000000007 RSI: ffffffff8d9ba2bf RDI: ffffffff8be33e00
RBP: ffffc90007327130 R08: ffffffff8fa3a937 R09: 1ffffffff1f47526
R10: dffffc0000000000 R11: fffffbfff1f47527 R12: ffff888109e05640
R13: dffffc0000000000 R14: ffff888109e01cc0 R15: ffff88813663ab58
 __schedule+0x17a0/0x4cc0
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:should_failslab+0x2a/0x100
Code: 66 0f 1f 00 41 57 41 56 41 54 53 89 f3 49 89 fe 49 bc 00 00 00 00 00 fc ff df 48 c7 c0 48 70 b1 99 48 c1 e8 03 42 80 3c 20 00 <74> 0c 48 c7 c7 48 70 b1 99 e8 38 76 ff ff 31 c0 66 85 db 78 75 4c
RSP: 0018:ffffc900073274c8 EFLAGS: 00000246
RAX: 1ffffffff3362e09 RBX: 0000000000000d40 RCX: 47e3ce04bafbc200
RDX: ffff888109e05640 RSI: 0000000000000d40 RDI: ffff88801a441780
RBP: 0000000000000d40 R08: 0000000000000000 R09: ffffffff8215eb9d
R10: ffffc90007327240 R11: ffffffffa0000808 R12: dffffc0000000000
R13: 0000000000000011 R14: ffff88801a441780 R15: 000000000000001c
 __kmalloc_noprof+0xcb/0x4f0
 tomoyo_encode+0x28b/0x550
 tomoyo_realpath_from_path+0x58d/0x5d0
 tomoyo_check_open_permission+0x1c1/0x3b0
 security_file_open+0xb1/0x270
 do_dentry_open+0x384/0x13f0
 vfs_open+0x3b/0x340
 path_openat+0x2ee5/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7feae638d510
Code: 48 89 44 24 20 75 93 44 89 54 24 0c e8 49 94 02 00 44 8b 54 24 0c 89 da 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 38 44 89 c7 89 44 24 0c e8 9c 94 02 00 8b 44
RSP: 002b:00007feae718cf10 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007feae638d510
RDX: 0000000000000000 RSI: 00007feae718cfa0 RDI: 00000000ffffff9c
RBP: 00007feae718cfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007feae65d6038 R14: 00007feae65d5fa0 R15: 00007ffc8b0d2388
 </TASK>
