EXT4-fs: failed to create workqueue
EXT4-fs (loop4): mount failed
INFO: rcu_sched detected stalls on CPUs/tasks:
	(detected by 0, t=10502 jiffies, g=4486, c=4485, q=3)
All QSes seen, last rcu_sched kthread activity 10502 (4294980043-4294969541), jiffies_till_next_fqs=1, root ->qsmask 0x0
syz-executor.2  R  running task    27568 12406   7497 0x00000008
Call Trace:
 <IRQ>
 sched_show_task kernel/sched/core.c:5168 [inline]
 sched_show_task.cold+0x2e3/0x347 kernel/sched/core.c:5143
 print_other_cpu_stall kernel/rcu/tree.c:1501 [inline]
 check_cpu_stall kernel/rcu/tree.c:1616 [inline]
 __rcu_pending kernel/rcu/tree.c:3390 [inline]
 rcu_pending kernel/rcu/tree.c:3452 [inline]
 rcu_check_callbacks.cold+0xd3f/0xdaa kernel/rcu/tree.c:2792
 update_process_times+0x29/0x60 kernel/time/timer.c:1590
 tick_sched_handle+0x7d/0x150 kernel/time/tick-sched.c:165
 tick_sched_timer+0x3e/0x120 kernel/time/tick-sched.c:1223
 __run_hrtimer kernel/time/hrtimer.c:1223 [inline]
 __hrtimer_run_queues+0x25c/0xbb0 kernel/time/hrtimer.c:1287
 hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
 smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1100
 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
RIP: 0010:deref_stack_regs arch/x86/kernel/unwind_orc.c:307 [inline]
RIP: 0010:unwind_next_frame+0xd8d/0x17a0 arch/x86/kernel/unwind_orc.c:437
RSP: 0018:ffff8880aea07448 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: dffffc0000000000 RBX: ffff8880aea074f8 RCX: 1ffff11015d40ea1
RDX: 1ffff1100aba3ffb RSI: ffff888055d1ff58 RDI: ffff888055d1ffd8
RBP: 1ffff11015d40e90 R08: ffffffff8950c198 R09: ffff888055d1ff58
R10: ffff8880aea0752d R11: 0000000000058071 R12: ffffffff8950c194
R13: ffff8880aea07530 R14: ffff8880aea07540 R15: 0000000000000001
 __save_stack_trace+0x6b/0xd0 arch/x86/kernel/stacktrace.c:44
 save_stack+0x32/0xa0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc mm/kasan/kasan.c:551 [inline]
 kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:529
 slab_post_alloc_hook mm/slab.h:442 [inline]
 slab_alloc mm/slab.c:3390 [inline]
 __do_kmalloc mm/slab.c:3718 [inline]
 __kmalloc+0x145/0x7c0 mm/slab.c:3729
 kmalloc include/linux/slab.h:493 [inline]
 kzalloc include/linux/slab.h:661 [inline]
 neigh_alloc net/core/neighbour.c:324 [inline]
 __neigh_create+0x1da/0x1980 net/core/neighbour.c:499
 ip6_finish_output2+0xa8e/0x2150 net/ipv6/ip6_output.c:117
 ip6_finish_output+0x4d9/0xaf0 net/ipv6/ip6_output.c:154
 NF_HOOK_COND include/linux/netfilter.h:239 [inline]
 ip6_output+0x1c9/0x650 net/ipv6/ip6_output.c:171
 dst_output include/net/dst.h:462 [inline]
 NF_HOOK include/linux/netfilter.h:250 [inline]
 ndisc_send_skb+0xb56/0x11e0 net/ipv6/ndisc.c:483
 ndisc_send_rs+0x125/0x630 net/ipv6/ndisc.c:677
 addrconf_rs_timer+0x289/0x5a0 net/ipv6/addrconf.c:3761
 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1279
 expire_timers kernel/time/timer.c:1318 [inline]
 __run_timers kernel/time/timer.c:1636 [inline]
 __run_timers kernel/time/timer.c:1604 [inline]
 run_timer_softirq+0x52a/0x1390 kernel/time/timer.c:1649
 __do_softirq+0x254/0x9bf kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x15b/0x1a0 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline]
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x91/0xe0 kernel/locking/spinlock.c:192
RSP: 0018:ffff888055d1f7f0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10
RAX: 1ffffffff0fa2cd1 RBX: 0000000000000282 RCX: 1ffff11010feed4b
RDX: dffffc0000000000 RSI: ffff888087f76a38 RDI: 0000000000000282
RBP: ffff888055d1fab8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 1ffff1100aba3f03
 spin_unlock_irqrestore include/linux/spinlock.h:372 [inline]
 __wake_up_common_lock+0xcd/0x140 kernel/sched/wait.c:126
 __d_lookup_done+0x1b3/0x420 fs/dcache.c:2602
 __d_add fs/dcache.c:2620 [inline]
 d_add+0x4ea/0x630 fs/dcache.c:2653
 proc_pident_instantiate+0x1d1/0x280 fs/proc/base.c:2462
 proc_pident_lookup+0x17a/0x1f0 fs/proc/base.c:2498
 lookup_open+0x5d1/0x1750 fs/namei.c:3220
 do_last fs/namei.c:3334 [inline]
 path_openat+0x1878/0x3c50 fs/namei.c:3569
 do_filp_open+0x18e/0x250 fs/namei.c:3603
 do_sys_open+0x29d/0x3f0 fs/open.c:1081
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4165e1
RSP: 002b:00007f476bd18bb0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f476bd196d4 RCX: 00000000004165e1
RDX: 00007f476bd18be1 RSI: 0000000000000002 RDI: 00007f476bd18bd0
RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000011
R10: 0000000000000006 R11: 0000000000000293 R12: 00000000ffffffff
R13: 0000000000000c18 R14: 00000000004ce43e R15: 000000000076bf0c
rcu_sched kthread starved for 10502 jiffies! g4486 c4485 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=1
rcu_sched       R  running task    29920     9      2 0x80000000
Call Trace:
 schedule+0x8d/0x1b0 kernel/sched/core.c:3428
 schedule_timeout+0x43c/0xe40 kernel/time/timer.c:1746
 rcu_gp_kthread+0xb8e/0x1ce0 kernel/rcu/tree.c:2255
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
INFO: rcu_preempt self-detected stall on CPU
	1-...: (1 GPs behind) idle=d36/140000000000002/0 softirq=27299/27301 fqs=4 
	 (t=10501 jiffies g=6427 c=6426 q=435)
rcu_preempt kthread starved for 10493 jiffies! g6427 c6426 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0
INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu_preempt     R
  running task    29280     8      2 0x80000000
	1-...: (1 GPs behind) idle=d36/140000000000002/0 softirq=27299/27301 fqs=4 
Call Trace:
 schedule+0x8d/0x1b0 kernel/sched/core.c:3428
 schedule_timeout+0x43c/0xe40 kernel/time/timer.c:1746
	
 rcu_gp_kthread+0xb8e/0x1ce0 kernel/rcu/tree.c:2255
(detected by 0, t=10502 jiffies, g=6427, c=6426, q=435)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 12394 Comm: syz-executor.1 Not tainted 4.14.174-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88808dd18640 task.stack: ffff888055960000
RIP: 0010:debug_lockdep_rcu_enabled+0x2a/0x90 kernel/rcu/update.c:299
RSP: 0018:ffff8880aeb06f00 EFLAGS: 00000046
RAX: 0000000000000007 RBX: ffff88808dd18640 RCX: 1ffffffff11244c8
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88808dd18ebc
RBP: ffffffff8af84bf8 R08: 0000000000000001 R09: 0000000000000000
R10: ffff88808dd19050 R11: ffff88808dd18640 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
FS:  00007f1b73ae1700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3122b000 CR3: 00000000915bc000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 trace_lock_acquire include/trace/events/lock.h:13 [inline]
 lock_acquire+0x307/0x3f0 kernel/locking/lockdep.c:3993
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x8c/0xbf kernel/locking/spinlock.c:160
 serial8250_console_write+0x6c1/0x8e0 drivers/tty/serial/8250/8250_port.c:3236
 call_console_drivers kernel/printk/printk.c:1725 [inline]
 console_unlock+0x9b2/0xec0 kernel/printk/printk.c:2397
 vprintk_emit kernel/printk/printk.c:1923 [inline]
 vprintk_emit+0x1f8/0x600 kernel/printk/printk.c:1888
 vprintk_func+0x58/0x152 kernel/printk/printk_safe.c:401
 printk+0x9e/0xbc kernel/printk/printk.c:1996
 printk_stack_address arch/x86/kernel/dumpstack.c:70 [inline]
 show_trace_log_lvl+0x209/0x281 arch/x86/kernel/dumpstack.c:202
 sched_show_task kernel/sched/core.c:5168 [inline]
 sched_show_task.cold+0x2e3/0x347 kernel/sched/core.c:5143
 rcu_check_gp_kthread_starvation+0x28d/0x2d4 kernel/rcu/tree.c:1374
 print_cpu_stall kernel/rcu/tree.c:1540 [inline]
 check_cpu_stall kernel/rcu/tree.c:1610 [inline]
 __rcu_pending kernel/rcu/tree.c:3390 [inline]
 rcu_pending kernel/rcu/tree.c:3452 [inline]
 rcu_check_callbacks.cold+0x488/0xdaa kernel/rcu/tree.c:2792
 update_process_times+0x29/0x60 kernel/time/timer.c:1590
 tick_sched_handle+0x7d/0x150 kernel/time/tick-sched.c:165
 tick_sched_timer+0x3e/0x120 kernel/time/tick-sched.c:1223
 __run_hrtimer kernel/time/hrtimer.c:1223 [inline]
 __hrtimer_run_queues+0x25c/0xbb0 kernel/time/hrtimer.c:1287
 hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
 smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1100
 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
RIP: 0010:neigh_fill_info+0x7d0/0xce0 net/core/neighbour.c:2253
RSP: 0018:ffff8880aeb076c8 EFLAGS: 00000216 ORIG_RAX: ffffffffffffff10
RAX: dffffc0000000000 RBX: ffff88804de98940 RCX: 0000000000000000
RDX: 1ffff11009bd312b RSI: ffff8880aeb0777e RDI: 0000000000004acc
RBP: ffff8880a08d1c80 R08: 0000000000000001 R09: ffffed101411a398
R10: ffffed101411a397 R11: ffff8880a08d1cb9 R12: ffff888085bfc800
R13: ffff888076ecca80 R14: ffff88804de98a60 R15: ffff88804de98968
 __neigh_notify+0xab/0x150 net/core/neighbour.c:2930
 neigh_cleanup_and_release+0x71/0xc0 net/core/neighbour.c:106
 neigh_del+0x161/0x1f0 net/core/neighbour.c:141
 neigh_forced_gc net/core/neighbour.c:190 [inline]
 neigh_alloc net/core/neighbour.c:315 [inline]
 __neigh_create+0xc51/0x1980 net/core/neighbour.c:499
 ip6_finish_output2+0xa8e/0x2150 net/ipv6/ip6_output.c:117
 ip6_finish_output+0x4d9/0xaf0 net/ipv6/ip6_output.c:154
 NF_HOOK_COND include/linux/netfilter.h:239 [inline]
 ip6_output+0x1c9/0x650 net/ipv6/ip6_output.c:171
 dst_output include/net/dst.h:462 [inline]
 NF_HOOK include/linux/netfilter.h:250 [inline]
 ndisc_send_skb+0xb56/0x11e0 net/ipv6/ndisc.c:483
 ndisc_send_rs+0x125/0x630 net/ipv6/ndisc.c:677
 addrconf_rs_timer+0x289/0x5a0 net/ipv6/addrconf.c:3761
 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1279
 expire_timers kernel/time/timer.c:1318 [inline]
 __run_timers kernel/time/timer.c:1636 [inline]
 __run_timers kernel/time/timer.c:1604 [inline]
 run_timer_softirq+0x52a/0x1390 kernel/time/timer.c:1649
 __do_softirq+0x254/0x9bf kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x15b/0x1a0 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline]
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x91/0xe0 kernel/locking/spinlock.c:192
RSP: 0018:ffff8880559677f0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10
RAX: 1ffffffff0fa2cd1 RBX: 0000000000000282 RCX: 1ffff11011ba31eb
RDX: dffffc0000000000 RSI: ffff88808dd18f38 RDI: 0000000000000282
RBP: ffff888055967ab8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 1ffff1100ab2cf03
 spin_unlock_irqrestore include/linux/spinlock.h:372 [inline]
 __wake_up_common_lock+0xcd/0x140 kernel/sched/wait.c:126
 __d_lookup_done+0x1b3/0x420 fs/dcache.c:2602
 __d_add fs/dcache.c:2620 [inline]
 d_add+0x4ea/0x630 fs/dcache.c:2653
 proc_pident_instantiate+0x1d1/0x280 fs/proc/base.c:2462
 proc_pident_lookup+0x17a/0x1f0 fs/proc/base.c:2498
 lookup_open+0x5d1/0x1750 fs/namei.c:3220
 do_last fs/namei.c:3334 [inline]
 path_openat+0x1878/0x3c50 fs/namei.c:3569
 do_filp_open+0x18e/0x250 fs/namei.c:3603
 do_sys_open+0x29d/0x3f0 fs/open.c:1081
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4165e1
RSP: 002b:00007f1b73ae0bb0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f1b73ae16d4 RCX: 00000000004165e1
RDX: 00007f1b73ae0be1 RSI: 0000000000000002 RDI: 00007f1b73ae0bd0
RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000011
R10: 0000000000000006 R11: 0000000000000293 R12: 00000000ffffffff
R13: 0000000000000c18 R14: 00000000004ce43e R15: 000000000076bf0c
Code: 00 48 c7 c0 44 26 92 88 48 ba 00 00 00 00 00 fc ff df 48 89 c1 83 e0 07 48 c1 e9 03 83 c0 03 0f b6 14 11 38 d0 7c 04 84 d2 75 46 <8b> 15 24 33 47 07 85 d2 74 39 48 c7 c0 e0 cd 13 88 48 ba 00 00 
rcu_preempt kthread starved for 10494 jiffies! g6427 c6426 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0
 kthread+0x30d/0x420 kernel/kthread.c:232
rcu_preempt     R
  running task    29280     8      2 0x80000000
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Call Trace:
NMI backtrace for cpu 1
CPU: 1 PID: 12394 Comm: syz-executor.1 Not tainted 4.14.174-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 schedule+0x8d/0x1b0 kernel/sched/core.c:3428
 <IRQ>
 schedule_timeout+0x43c/0xe40 kernel/time/timer.c:1746
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x13e/0x194 lib/dump_stack.c:58
 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x139/0x17e lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:158 [inline]
 rcu_dump_cpu_stacks+0x16d/0x1b8 kernel/rcu/tree.c:1396
 rcu_gp_kthread+0xb8e/0x1ce0 kernel/rcu/tree.c:2255
 print_cpu_stall kernel/rcu/tree.c:1542 [inline]
 check_cpu_stall kernel/rcu/tree.c:1610 [inline]
 __rcu_pending kernel/rcu/tree.c:3390 [inline]
 rcu_pending kernel/rcu/tree.c:3452 [inline]
 rcu_check_callbacks.cold+0x490/0xdaa kernel/rcu/tree.c:2792
 update_process_times+0x29/0x60 kernel/time/timer.c:1590
 kthread+0x30d/0x420 kernel/kthread.c:232
 tick_sched_handle+0x7d/0x150 kernel/time/tick-sched.c:165
 tick_sched_timer+0x3e/0x120 kernel/time/tick-sched.c:1223
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
 __run_hrtimer kernel/time/hrtimer.c:1223 [inline]
 __hrtimer_run_queues+0x25c/0xbb0 kernel/time/hrtimer.c:1287
 hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
 smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1100
 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
RIP: 0010:neigh_fill_info+0x7d0/0xce0 net/core/neighbour.c:2253
RSP: 0018:ffff8880aeb076c8 EFLAGS: 00000216 ORIG_RAX: ffffffffffffff10
RAX: dffffc0000000000 RBX: ffff88804de98940 RCX: 0000000000000000
RDX: 1ffff11009bd312b RSI: ffff8880aeb0777e RDI: 0000000000004acc
RBP: ffff8880a08d1c80 R08: 0000000000000001 R09: ffffed101411a398
R10: ffffed101411a397 R11: ffff8880a08d1cb9 R12: ffff888085bfc800
R13: ffff888076ecca80 R14: ffff88804de98a60 R15: ffff88804de98968
 __neigh_notify+0xab/0x150 net/core/neighbour.c:2930
 neigh_cleanup_and_release+0x71/0xc0 net/core/neighbour.c:106
 neigh_del+0x161/0x1f0 net/core/neighbour.c:141
 neigh_forced_gc net/core/neighbour.c:190 [inline]
 neigh_alloc net/core/neighbour.c:315 [inline]
 __neigh_create+0xc51/0x1980 net/core/neighbour.c:499
 ip6_finish_output2+0xa8e/0x2150 net/ipv6/ip6_output.c:117
 ip6_finish_output+0x4d9/0xaf0 net/ipv6/ip6_output.c:154
 NF_HOOK_COND include/linux/netfilter.h:239 [inline]
 ip6_output+0x1c9/0x650 net/ipv6/ip6_output.c:171
 dst_output include/net/dst.h:462 [inline]
 NF_HOOK include/linux/netfilter.h:250 [inline]
 ndisc_send_skb+0xb56/0x11e0 net/ipv6/ndisc.c:483
 ndisc_send_rs+0x125/0x630 net/ipv6/ndisc.c:677
 addrconf_rs_timer+0x289/0x5a0 net/ipv6/addrconf.c:3761
 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1279
 expire_timers kernel/time/timer.c:1318 [inline]
 __run_timers kernel/time/timer.c:1636 [inline]
 __run_timers kernel/time/timer.c:1604 [inline]
 run_timer_softirq+0x52a/0x1390 kernel/time/timer.c:1649
 __do_softirq+0x254/0x9bf kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x15b/0x1a0 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline]
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x91/0xe0 kernel/locking/spinlock.c:192
RSP: 0018:ffff8880559677f0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10
RAX: 1ffffffff0fa2cd1 RBX: 0000000000000282 RCX: 1ffff11011ba31eb
RDX: dffffc0000000000 RSI: ffff88808dd18f38 RDI: 0000000000000282
RBP: ffff888055967ab8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 1ffff1100ab2cf03
 spin_unlock_irqrestore include/linux/spinlock.h:372 [inline]
 __wake_up_common_lock+0xcd/0x140 kernel/sched/wait.c:126
 __d_lookup_done+0x1b3/0x420 fs/dcache.c:2602
 __d_add fs/dcache.c:2620 [inline]
 d_add+0x4ea/0x630 fs/dcache.c:2653
 proc_pident_instantiate+0x1d1/0x280 fs/proc/base.c:2462
 proc_pident_lookup+0x17a/0x1f0 fs/proc/base.c:2498
 lookup_open+0x5d1/0x1750 fs/namei.c:3220
 do_last fs/namei.c:3334 [inline]
 path_openat+0x1878/0x3c50 fs/namei.c:3569
 do_filp_open+0x18e/0x250 fs/namei.c:3603
 do_sys_open+0x29d/0x3f0 fs/open.c:1081
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4165e1
RSP: 002b:00007f1b73ae0bb0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f1b73ae16d4 RCX: 00000000004165e1
RDX: 00007f1b73ae0be1 RSI: 0000000000000002 RDI: 00007f1b73ae0bd0
RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000011
R10: 0000000000000006 R11: 0000000000000293 R12: 00000000ffffffff
R13: 0000000000000c18 R14: 00000000004ce43e R15: 000000000076bf0c