rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10499 ticks this GP) idle=94c4/1/0x4000000000000000 softirq=24147/34355 fqs=0
rcu: 	(t=10500 jiffies g=22061 q=308 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10499 jiffies! g22061 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=7571
rcu: rcu_preempt kthread starved for 10500 jiffies! g22061 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27224 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
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+0x4bc/0x870
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5818 Comm: syz-executor 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+0x95/0x2c0
Code: 49 c1 e9 03 48 bb 01 00 00 00 00 fc ff df 4d 8d 34 19 4d 89 f4 4d 29 dc 49 83 fc 10 7f 29 4d 85 e4 0f 84 41 01 00 00 4c 89 cb <48> f7 d3 4c 01 fb 41 80 3b 00 0f 85 de 01 00 00 49 ff c3 48 ff c3
RSP: 0018:ffffc90000007b48 EFLAGS: 00000002
RAX: ffffffff8927f501 RBX: 1ffff11003e1ac2b RCX: ffffffff8927f5a0
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff88801f0d6158
RBP: ffffc90000007c60 R08: ffff88801f0d615f R09: 1ffff11003e1ac2b
R10: dffffc0000000000 R11: ffffed1003e1ac2b R12: 0000000000000001
R13: 1ffff92000000f74 R14: ffffed1003e1ac2c R15: 1ffff11003e1ac2b
FS:  0000555567847500(0000) GS:ffff88818eb36000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002000 CR3: 000000010cab8000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 __netif_schedule+0x90/0x2c0
 advance_sched+0xa9a/0xc90
 __hrtimer_run_queues+0x52c/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:lock_is_held_type+0x6c/0x190
Code: 8b 2c 25 08 a0 6e 92 41 83 bd 2c 0b 00 00 00 0f 85 d8 00 00 00 89 f5 49 89 fe 48 c7 04 24 00 00 00 00 9c 8f 04 24 4c 8b 24 24 <fa> 48 c7 c7 0b 30 72 8d e8 07 17 00 00 65 ff 05 10 5b 27 07 41 83
RSP: 0018:ffffc90004327758 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00000000ffffffff RCX: ffff888117f4ba00
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffffffff8df3d760
RBP: 00000000ffffffff R08: ffff888116f164ab R09: 1ffff11022de2c95
R10: dffffc0000000000 R11: ffffed1022de2c96 R12: 0000000000000246
R13: ffff888117f4ba00 R14: ffffffff8df3d760 R15: dffffc0000000000
 __might_resched+0xf5/0x610
 f2fs_write_checkpoint+0x548/0x2440
 kill_f2fs_super+0x2cc/0x6d0
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x425/0x4c0
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xe9/0x130
 do_syscall_64+0x2bd/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb6df390a77
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007fff817e6938 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fb6df413d7d RCX: 00007fb6df390a77
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff817e69f0
RBP: 00007fff817e69f0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff817e7a80
R13: 00007fb6df413d7d R14: 000000000001c036 R15: 00007fff817e7ac0
 </TASK>
CPU: 1 UID: 0 PID: 7304 Comm: syz.3.317 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+0xd33/0x12d0
Code: 45 8b 2c 24 44 89 ee 83 e6 01 31 ff e8 96 75 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 41 71 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 25 71
RSP: 0018:ffffc90005d57480 EFLAGS: 00000293
RAX: ffffffff81b4a83b RBX: 1ffff11024248441 RCX: ffff88816b895700
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90005d57600 R08: ffffffff8f7cf877 R09: 1ffffffff1ef9f0e
R10: dffffc0000000000 R11: fffffbfff1ef9f0f R12: ffff888121242208
R13: dffffc0000000000 R14: ffff88823c63b240 R15: 0000000000000000
FS:  00007fd50d3d86c0(0000) GS:ffff8882a9f36000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c25268d CR3: 00000001143f0000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80
 flush_tlb_mm_range+0x6b1/0x12d0
 tlb_flush_mmu+0x1a7/0x680
 tlb_finish_mmu+0xc3/0x1d0
 exit_mmap+0x43e/0xb30
 __mmput+0x118/0x430
 exit_mm+0x1da/0x2c0
 do_exit+0x648/0x2300
 do_group_exit+0x21c/0x2d0
 get_signal+0x1285/0x1340
 arch_do_signal_or_restart+0xa0/0x790
 exit_to_user_mode_loop+0x72/0x130
 do_syscall_64+0x2bd/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd50c58f749
Code: Unable to access opcode bytes at 0x7fd50c58f71f.
RSP: 002b:00007fd50d3d80e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fd50c7e5fa8 RCX: 00007fd50c58f749
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fd50c7e5fa8
RBP: 00007fd50c7e5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd50c7e6038 R14: 00007fff98af85e0 R15: 00007fff98af86c8
 </TASK>
