rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10499 ticks this GP) idle=54a/1/0x4000000000000000 softirq=66482/66482 fqs=4561 
	(t=10500 jiffies g=76993 q=242385)
NMI backtrace for cpu 0
CPU: 0 PID: 18128 Comm: syz-executor.0 Not tainted 5.11.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack syzkaller/managers/upstream-kasan-gce-root/kernel/lib/dump_stack.c:79 [inline]
 dump_stack+0x107/0x163 syzkaller/managers/upstream-kasan-gce-root/kernel/lib/dump_stack.c:120
 nmi_cpu_backtrace.cold+0x44/0xd7 syzkaller/managers/upstream-kasan-gce-root/kernel/lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x1b3/0x230 syzkaller/managers/upstream-kasan-gce-root/kernel/lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace syzkaller/managers/upstream-kasan-gce-root/kernel/./include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x1f4/0x230 syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/rcu/tree_stall.h:337
 print_cpu_stall syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/rcu/tree_stall.h:569 [inline]
 check_cpu_stall syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/rcu/tree_stall.h:643 [inline]
 rcu_pending syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/rcu/tree.c:3751 [inline]
 rcu_sched_clock_irq.cold+0x48e/0xedf syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/rcu/tree.c:2580
 update_process_times+0x16d/0x200 syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/time/timer.c:1782
 tick_sched_handle+0x9b/0x180 syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/time/tick-sched.c:226
 tick_sched_timer+0x1b0/0x2d0 syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/time/tick-sched.c:1369
 __run_hrtimer syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/time/hrtimer.c:1519 [inline]
 __hrtimer_run_queues+0x1c0/0xe40 syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/time/hrtimer.c:1583
 hrtimer_interrupt+0x334/0x940 syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/time/hrtimer.c:1645
 local_apic_timer_interrupt syzkaller/managers/upstream-kasan-gce-root/kernel/arch/x86/kernel/apic/apic.c:1085 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x540 syzkaller/managers/upstream-kasan-gce-root/kernel/arch/x86/kernel/apic/apic.c:1102
 run_sysvec_on_irqstack_cond syzkaller/managers/upstream-kasan-gce-root/kernel/./arch/x86/include/asm/irq_stack.h:91 [inline]
 sysvec_apic_timer_interrupt+0x48/0x100 syzkaller/managers/upstream-kasan-gce-root/kernel/arch/x86/kernel/apic/apic.c:1096
 asm_sysvec_apic_timer_interrupt+0x12/0x20 syzkaller/managers/upstream-kasan-gce-root/kernel/./arch/x86/include/asm/idtentry.h:629
RIP: 0010:__raw_spin_unlock_irqrestore syzkaller/managers/upstream-kasan-gce-root/kernel/./include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x25/0x50 syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/locking/spinlock.c:191
Code: f8 5d c3 66 90 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8 9a e7 5b f8 48 89 ef e8 42 9c 5c f8 f6 c7 02 75 1a 53 9d <bf> 01 00 00 00 e8 81 a3 50 f8 65 8b 05 7a 09 05 77 85 c0 74 0a 5b
RSP: 0018:ffffc90000007bd0 EFLAGS: 00000216
RAX: 0000000000e82374 RBX: 0000000000000216 RCX: ffffffff81585217
RDX: 0000000000000000 RSI: 0000000000000102 RDI: 0000000000000000
RBP: ffffffff8fdf3d98 R08: 0000000000000001 R09: ffffffff8f8668ef
R10: fffffbfff1f0cd1d R11: 000000000000003f R12: 0000000000000015
R13: 0000000000000015 R14: dead000000000100 R15: dffffc0000000000
 __debug_check_no_obj_freed syzkaller/managers/upstream-kasan-gce-root/kernel/lib/debugobjects.c:997 [inline]
 debug_check_no_obj_freed+0x20c/0x420 syzkaller/managers/upstream-kasan-gce-root/kernel/lib/debugobjects.c:1018
 slab_free_hook syzkaller/managers/upstream-kasan-gce-root/kernel/mm/slub.c:1539 [inline]
 slab_free_freelist_hook+0x107/0x150 syzkaller/managers/upstream-kasan-gce-root/kernel/mm/slub.c:1580
 slab_free syzkaller/managers/upstream-kasan-gce-root/kernel/mm/slub.c:3143 [inline]
 kmem_cache_free+0x82/0x350 syzkaller/managers/upstream-kasan-gce-root/kernel/mm/slub.c:3159
 inet_twsk_free+0x123/0x180 syzkaller/managers/upstream-kasan-gce-root/kernel/net/ipv4/inet_timewait_sock.c:73
 inet_twsk_put+0x78/0xa0 syzkaller/managers/upstream-kasan-gce-root/kernel/net/ipv4/inet_timewait_sock.c:80
 call_timer_fn+0x1a5/0x6b0 syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/time/timer.c:1417
 expire_timers syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/time/timer.c:1462 [inline]
 __run_timers.part.0+0x67c/0xa50 syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/time/timer.c:1731
 __run_timers syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/time/timer.c:1712 [inline]
 run_timer_softirq+0xb3/0x1d0 syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/time/timer.c:1744
 __do_softirq+0x29b/0x9f6 syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/softirq.c:343
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack syzkaller/managers/upstream-kasan-gce-root/kernel/./arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond syzkaller/managers/upstream-kasan-gce-root/kernel/./arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0xaa/0xd0 syzkaller/managers/upstream-kasan-gce-root/kernel/arch/x86/kernel/irq_64.c:77
 invoke_softirq syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/softirq.c:226 [inline]
 __irq_exit_rcu syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/softirq.c:420 [inline]
 irq_exit_rcu+0x134/0x200 syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/softirq.c:432
 sysvec_apic_timer_interrupt+0x4d/0x100 syzkaller/managers/upstream-kasan-gce-root/kernel/arch/x86/kernel/apic/apic.c:1096
 asm_sysvec_apic_timer_interrupt+0x12/0x20 syzkaller/managers/upstream-kasan-gce-root/kernel/./arch/x86/include/asm/idtentry.h:629
RIP: 0010:__raw_spin_unlock_irqrestore syzkaller/managers/upstream-kasan-gce-root/kernel/./include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x25/0x50 syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/locking/spinlock.c:191
Code: f8 5d c3 66 90 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8 9a e7 5b f8 48 89 ef e8 42 9c 5c f8 f6 c7 02 75 1a 53 9d <bf> 01 00 00 00 e8 81 a3 50 f8 65 8b 05 7a 09 05 77 85 c0 74 0a 5b
RSP: 0018:ffffc900021df528 EFLAGS: 00000216
RAX: 00000000003990c1 RBX: 0000000000000216 RCX: 1ffffffff1b46a21
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffffff8fe40fb8 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8178a418 R11: 0000000000000003 R12: 0000000000000008
R13: 0000000000000008 R14: dead000000000100 R15: dffffc0000000000
 __debug_check_no_obj_freed syzkaller/managers/upstream-kasan-gce-root/kernel/lib/debugobjects.c:997 [inline]
 debug_check_no_obj_freed+0x20c/0x420 syzkaller/managers/upstream-kasan-gce-root/kernel/lib/debugobjects.c:1018
 free_pages_prepare syzkaller/managers/upstream-kasan-gce-root/kernel/mm/page_alloc.c:1276 [inline]
 __free_pages_ok+0x2f9/0xec0 syzkaller/managers/upstream-kasan-gce-root/kernel/mm/page_alloc.c:1536
 release_pages+0x80c/0x1d20 syzkaller/managers/upstream-kasan-gce-root/kernel/mm/swap.c:909
 tlb_batch_pages_flush syzkaller/managers/upstream-kasan-gce-root/kernel/mm/mmu_gather.c:49 [inline]
 tlb_flush_mmu_free syzkaller/managers/upstream-kasan-gce-root/kernel/mm/mmu_gather.c:242 [inline]
 tlb_flush_mmu+0xe9/0x6b0 syzkaller/managers/upstream-kasan-gce-root/kernel/mm/mmu_gather.c:249
 zap_pte_range syzkaller/managers/upstream-kasan-gce-root/kernel/mm/memory.c:1330 [inline]
 zap_pmd_range syzkaller/managers/upstream-kasan-gce-root/kernel/mm/memory.c:1368 [inline]
 zap_pud_range syzkaller/managers/upstream-kasan-gce-root/kernel/mm/memory.c:1397 [inline]
 zap_p4d_range syzkaller/managers/upstream-kasan-gce-root/kernel/mm/memory.c:1418 [inline]
 unmap_page_range+0x1a75/0x2640 syzkaller/managers/upstream-kasan-gce-root/kernel/mm/memory.c:1439
 unmap_single_vma+0x198/0x300 syzkaller/managers/upstream-kasan-gce-root/kernel/mm/memory.c:1484
 unmap_vmas+0x168/0x2e0 syzkaller/managers/upstream-kasan-gce-root/kernel/mm/memory.c:1516
 exit_mmap+0x2b1/0x5a0 syzkaller/managers/upstream-kasan-gce-root/kernel/mm/mmap.c:3220
 __mmput+0x122/0x470 syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/fork.c:1082
 mmput+0x53/0x60 syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/fork.c:1103
 exit_mm syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/exit.c:501 [inline]
 do_exit+0xb6a/0x2ae0 syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/exit.c:812
 do_group_exit+0x125/0x310 syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/exit.c:922
 get_signal+0x427/0x20f0 syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/signal.c:2773
 arch_do_signal_or_restart+0x2a8/0x1eb0 syzkaller/managers/upstream-kasan-gce-root/kernel/arch/x86/kernel/signal.c:811
 handle_signal_work syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/entry/common.c:147 [inline]
 exit_to_user_mode_loop syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/entry/common.c:171 [inline]
 exit_to_user_mode_prepare+0x148/0x250 syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/entry/common.c:201
 irqentry_exit_to_user_mode+0x5/0x30 syzkaller/managers/upstream-kasan-gce-root/kernel/kernel/entry/common.c:315
 asm_sysvec_apic_timer_interrupt+0x12/0x20 syzkaller/managers/upstream-kasan-gce-root/kernel/./arch/x86/include/asm/idtentry.h:629
RIP: 0033:0x465b1e
Code: Unable to access opcode bytes at RIP 0x465af4.
RSP: 002b:00007fe4c5512188 EFLAGS: 00000217
RAX: 0000000000000009 RBX: 000000000056c158 RCX: ffffffffffffffbc
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffffffff
RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c158
R13: 00007ffe1c8a340f R14: 00007fe4c5512300 R15: 0000000000022000