rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10499 ticks this GP) idle=826/1/0x4000000000000004 softirq=36260/36260 fqs=5196 
rcu: 	 (t=10500 jiffies g=33953 q=159939)
NMI backtrace for cpu 1
CPU: 1 PID: 13259 Comm: syz-executor.5 Not tainted 4.19.121-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x188/0x20d lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1a6/0x1eb lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x170/0x1bb kernel/rcu/tree.c:1340
 print_cpu_stall kernel/rcu/tree.c:1478 [inline]
 check_cpu_stall kernel/rcu/tree.c:1550 [inline]
 __rcu_pending kernel/rcu/tree.c:3293 [inline]
 rcu_pending kernel/rcu/tree.c:3336 [inline]
 rcu_check_callbacks.cold+0x634/0xddc kernel/rcu/tree.c:2682
 update_process_times+0x2a/0x70 kernel/time/timer.c:1638
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:168
 tick_sched_timer+0x42/0x130 kernel/time/tick-sched.c:1278
 __run_hrtimer kernel/time/hrtimer.c:1401 [inline]
 __hrtimer_run_queues+0x2fc/0xd50 kernel/time/hrtimer.c:1463
 hrtimer_interrupt+0x312/0x770 kernel/time/hrtimer.c:1521
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline]
 smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1092
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [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:184
Code: 48 c7 c0 c8 56 d2 88 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 37 48 83 3d 7e bb b0 01 00 74 22 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 a0 1f 25 fa 65 8b 05 69 52 e0 78
RSP: 0018:ffff8880ae707cf8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff11a4ad9 RBX: 0000000000000282 RCX: 1ffff11013f8b9c5
RDX: dffffc0000000000 RSI: ffff88809fc5ce08 RDI: 0000000000000282
RBP: ffffffff8ba84348 R08: ffff88809fc5c580 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88804c630c78
R13: dffffc0000000000 R14: 1ffff11015ce0fa8 R15: ffffffff8ba84348
 debug_object_active_state lib/debugobjects.c:749 [inline]
 debug_object_active_state+0x25d/0x380 lib/debugobjects.c:713
 debug_rcu_head_unqueue kernel/rcu/rcu.h:202 [inline]
 rcu_do_batch kernel/rcu/tree.c:2583 [inline]
 invoke_rcu_callbacks kernel/rcu/tree.c:2897 [inline]
 __rcu_process_callbacks kernel/rcu/tree.c:2864 [inline]
 rcu_process_callbacks+0xbde/0x17f0 kernel/rcu/tree.c:2881
 __do_softirq+0x26c/0x93c kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:372 [inline]
 irq_exit+0x17b/0x1c0 kernel/softirq.c:412
 exiting_irq arch/x86/include/asm/apic.h:544 [inline]
 smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1094
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline]
RIP: 0010:lock_release+0x42b/0x820 kernel/locking/lockdep.c:3929
Code: 84 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 e4 02 00 00 48 83 3d d9 84 82 07 00 0f 84 36 02 00 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 c7 04 03 00 00 00
RSP: 0018:ffff88804913f668 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff11a4ad9 RBX: 1ffff11009227ed1 RCX: 1ffff11013f8b9bf
RDX: dffffc0000000000 RSI: 0000000000000002 RDI: 0000000000000282
RBP: ffff88809fc5c580 R08: 0000000000000000 R09: 0000000000000001
R10: ffffed1015ce4732 R11: ffff8880ae723993 R12: ffffffff81a37fbf
R13: 0000000000000003 R14: ffff88809fc5c580 R15: 0000000000000002
 page_remove_file_rmap mm/rmap.c:1249 [inline]
 page_remove_rmap+0x55e/0x1260 mm/rmap.c:1300
 zap_pte_range mm/memory.c:1338 [inline]
 zap_pmd_range mm/memory.c:1440 [inline]
 zap_pud_range mm/memory.c:1469 [inline]
 zap_p4d_range mm/memory.c:1490 [inline]
 unmap_page_range+0xcec/0x1de0 mm/memory.c:1511
 unmap_single_vma+0x196/0x300 mm/memory.c:1556
 unmap_vmas+0xa9/0x180 mm/memory.c:1586
 exit_mmap+0x2b2/0x510 mm/mmap.c:3091
 __mmput kernel/fork.c:1015 [inline]
 mmput+0x14e/0x4a0 kernel/fork.c:1036
 exit_mm kernel/exit.c:546 [inline]
 do_exit+0xac8/0x2f30 kernel/exit.c:867
 do_group_exit+0x125/0x350 kernel/exit.c:983
 get_signal+0x3ec/0x1f90 kernel/signal.c:2588
 do_signal+0x8f/0x1710 arch/x86/kernel/signal.c:821
 exit_to_usermode_loop+0x22b/0x2b0 arch/x86/entry/common.c:163
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45f66a
Code: Bad RIP value.
RSP: 002b:00007fbf53429c58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e4
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000000045f66a
RDX: 000000000000024e RSI: 00007fbf53429c60 RDI: 0000000000000001
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000031c0 R14: 00000000004c353a R15: 00007fbf5342a6d4
rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
rcu: 	1-....: (1 GPs behind) idle=826/1/0x4000000000000004 softirq=36257/36260 fqs=5196 
rcu: 	(detected by 0, t=10563 jiffies, g=437, q=1)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 13259 Comm: syz-executor.5 Not tainted 4.19.121-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:mark_lock+0x13/0x11b0 kernel/locking/lockdep.c:3098
Code: d2 88 e8 80 4f 4e 00 eb 8a 48 c7 c7 00 eb 9f 8b e8 62 4f 4e 00 eb c3 48 b8 00 00 00 00 00 fc ff df 41 57 89 d1 41 89 d7 41 56 <49> 89 fe 41 55 4c 8d 6e 20 4c 89 ea 41 54 41 bc 01 00 00 00 55 48
RSP: 0018:ffff8880ae707948 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000008
RDX: 0000000000000008 RSI: ffff88809fc5ce58 RDI: ffff88809fc5c580
RBP: ffff8880ae707b28 R08: 0000000000000000 R09: 0000000000000002
R10: ffff88809fc5ce58 R11: 000000000000002d R12: 0000000000000000
R13: 00000000000a602d R14: ffff88809fc5c580 R15: 0000000000000008
FS:  00007fbf5342a700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000045f640 CR3: 000000009fb98000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __lock_acquire+0x6ee/0x49c0 kernel/locking/lockdep.c:3376
 lock_acquire+0x170/0x400 kernel/locking/lockdep.c:3907
 rcu_lock_acquire include/linux/rcupdate.h:242 [inline]
 rcu_read_lock include/linux/rcupdate.h:627 [inline]
 kill_fasync fs/fcntl.c:1020 [inline]
 kill_fasync+0x6c/0x470 fs/fcntl.c:1014
 perf_event_wakeup+0x267/0x3c0 kernel/events/core.c:5837
 perf_pending_event+0x10f/0x180 kernel/events/core.c:5893
 irq_work_run_list kernel/irq_work.c:164 [inline]
 irq_work_run_list+0x140/0x1c0 kernel/irq_work.c:141
 irq_work_run+0x4e/0xc0 kernel/irq_work.c:179
 smp_irq_work_interrupt+0x98/0x440 arch/x86/kernel/irq_work.c:21
 irq_work_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:924
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:23 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:67 [inline]
RIP: 0010:write_comp_data+0x9/0x70 kernel/kcov.c:122
Code: 80 dc 12 00 00 48 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 c3 0f 1f 84 00 00 00 00 00 65 4c 8b 04 25 40 ee 01 00 <65> 8b 05 d0 23 9a 7e a9 00 01 1f 00 75 51 41 8b 80 d8 12 00 00 83
RSP: 0018:ffff8880ae707d70 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff09
RAX: ffff88809fc5c580 RBX: 0000000000000103 RCX: ffffffff8357b1b3
RDX: 0000000000000103 RSI: 0000000000000000 RDI: 0000000000000005
RBP: ffffffff87cb0320 R08: ffff88809fc5c580 R09: ffffed1015ce4733
R10: ffffed1015ce4732 R11: ffff8880ae723993 R12: 0000000000000001
R13: ffffffff87cb02e0 R14: ffff8880ae707e90 R15: dffffc0000000000
 check_preemption_disabled+0x33/0x280 lib/smp_processor_id.c:15
 rcu_lockdep_current_cpu_online kernel/rcu/tree.c:1078 [inline]
 rcu_lockdep_current_cpu_online+0xb2/0x1b0 kernel/rcu/tree.c:1068
 rcu_read_lock_sched_held+0x92/0x130 kernel/rcu/update.c:115
 trace_kfree include/trace/events/kmem.h:137 [inline]
 kfree+0x1f2/0x220 mm/slab.c:3812
 __rcu_reclaim kernel/rcu/rcu.h:231 [inline]
 rcu_do_batch kernel/rcu/tree.c:2584 [inline]
 invoke_rcu_callbacks kernel/rcu/tree.c:2897 [inline]
 __rcu_process_callbacks kernel/rcu/tree.c:2864 [inline]
 rcu_process_callbacks+0xc3c/0x17f0 kernel/rcu/tree.c:2881
 __do_softirq+0x26c/0x93c kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:372 [inline]
 irq_exit+0x17b/0x1c0 kernel/softirq.c:412
 exiting_irq arch/x86/include/asm/apic.h:544 [inline]
 smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1094
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline]
RIP: 0010:lock_release+0x42b/0x820 kernel/locking/lockdep.c:3929
Code: 84 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 e4 02 00 00 48 83 3d d9 84 82 07 00 0f 84 36 02 00 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 c7 04 03 00 00 00
RSP: 0018:ffff88804913f668 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff11a4ad9 RBX: 1ffff11009227ed1 RCX: 1ffff11013f8b9bf
RDX: dffffc0000000000 RSI: 0000000000000002 RDI: 0000000000000282
RBP: ffff88809fc5c580 R08: 0000000000000000 R09: 0000000000000001
R10: ffffed1015ce4732 R11: ffff8880ae723993 R12: ffffffff81a37fbf
R13: 0000000000000003 R14: ffff88809fc5c580 R15: 0000000000000002
 page_remove_file_rmap mm/rmap.c:1249 [inline]
 page_remove_rmap+0x55e/0x1260 mm/rmap.c:1300
 zap_pte_range mm/memory.c:1338 [inline]
 zap_pmd_range mm/memory.c:1440 [inline]
 zap_pud_range mm/memory.c:1469 [inline]
 zap_p4d_range mm/memory.c:1490 [inline]
 unmap_page_range+0xcec/0x1de0 mm/memory.c:1511
 unmap_single_vma+0x196/0x300 mm/memory.c:1556
 unmap_vmas+0xa9/0x180 mm/memory.c:1586
 exit_mmap+0x2b2/0x510 mm/mmap.c:3091
 __mmput kernel/fork.c:1015 [inline]
 mmput+0x14e/0x4a0 kernel/fork.c:1036
 exit_mm kernel/exit.c:546 [inline]
 do_exit+0xac8/0x2f30 kernel/exit.c:867
 do_group_exit+0x125/0x350 kernel/exit.c:983
 get_signal+0x3ec/0x1f90 kernel/signal.c:2588
 do_signal+0x8f/0x1710 arch/x86/kernel/signal.c:821
 exit_to_usermode_loop+0x22b/0x2b0 arch/x86/entry/common.c:163
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45f66a
Code: Bad RIP value.
RSP: 002b:00007fbf53429c58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e4
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000000045f66a
RDX: 000000000000024e RSI: 00007fbf53429c60 RDI: 0000000000000001
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000031c0 R14: 00000000004c353a R15: 00007fbf5342a6d4