rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (1 GPs behind) idle=b26/1/0x4000000000000000 softirq=39954/39957 fqs=14 
	(t=10500 jiffies g=57825 q=96)
rcu: rcu_preempt kthread starved for 10470 jiffies! g57825 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
rcu_preempt     I28912    10      2 0x00004000
Call Trace:
 context_switch kernel/sched/core.c:3453 [inline]
 __schedule+0x7d3/0xc40 kernel/sched/core.c:4178
NMI backtrace for cpu 0
CPU: 0 PID: 21340 Comm: syz-executor.2 Not tainted 5.8.0-rc3-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+0x1f0/0x31e lib/dump_stack.c:118
 nmi_cpu_backtrace+0x9f/0x180 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x199/0x2a0 kernel/rcu/tree_stall.h:320
 print_cpu_stall kernel/rcu/tree_stall.h:553 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:627 [inline]
 rcu_pending kernel/rcu/tree.c:3489 [inline]
 rcu_sched_clock_irq+0x1928/0x1eb0 kernel/rcu/tree.c:2504
 update_process_times+0x12c/0x180 kernel/time/timer.c:1726
 tick_sched_handle kernel/time/tick-sched.c:176 [inline]
 tick_sched_timer+0x254/0x410 kernel/time/tick-sched.c:1320
 __run_hrtimer kernel/time/hrtimer.c:1520 [inline]
 __hrtimer_run_queues+0x42d/0x930 kernel/time/hrtimer.c:1584
 hrtimer_interrupt+0x373/0xd60 kernel/time/hrtimer.c:1646
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline]
 __sysvec_apic_timer_interrupt+0xf0/0x260 arch/x86/kernel/apic/apic.c:1097
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 sysvec_apic_timer_interrupt+0xb9/0x130 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:596
RIP: 0010:should_resched arch/x86/include/asm/preempt.h:102 [inline]
RIP: 0010:__local_bh_enable_ip+0x166/0x230 kernel/softirq.c:196
Code: e8 03 42 80 3c 20 00 74 0c 48 c7 c7 00 c8 2b 89 e8 bf ec 6b 00 48 83 3d b7 39 e4 07 00 0f 84 cc 00 00 00 fb 66 0f 1f 44 00 00 <65> 8b 05 af 6f ba 7e 85 c0 75 05 e8 a1 e0 b8 ff 5b 41 5c 41 5e 41
RSP: 0018:ffffc900067af038 EFLAGS: 00000282
RAX: 1ffffffff1257900 RBX: ffff888030954a48 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff81478e23
RBP: ffff888030954a8c R08: dffffc0000000000 R09: fffffbfff16334bc
R10: fffffbfff16334bc R11: 0000000000000000 R12: dffffc0000000000
R13: ffffc900067af318 R14: ffffffff87dc6fde R15: 0000000000000200
 __raw_spin_trylock_bh include/linux/spinlock_api_smp.h:186 [inline]
 _raw_spin_trylock_bh+0x5d/0x70 kernel/locking/spinlock.c:143
 spin_trylock_bh include/linux/spinlock.h:413 [inline]
 tipc_sk_rcv+0x2de/0x1940 net/tipc/socket.c:2465
 tipc_node_xmit+0x257/0x10d0 net/tipc/node.c:1652
 tipc_node_xmit_skb+0x110/0x150 net/tipc/node.c:1712
 tipc_sk_rcv+0x16f4/0x1940 net/tipc/socket.c:2491
 tipc_node_xmit+0x257/0x10d0 net/tipc/node.c:1652
 tipc_sk_push_backlog net/tipc/socket.c:1303 [inline]
 tipc_sk_filter_connect net/tipc/socket.c:2226 [inline]
 tipc_sk_filter_rcv+0x1660/0x3ca0 net/tipc/socket.c:2335
 tipc_sk_enqueue net/tipc/socket.c:2415 [inline]
 tipc_sk_rcv+0x6e1/0x1940 net/tipc/socket.c:2466
 tipc_node_xmit+0x257/0x10d0 net/tipc/node.c:1652
 tipc_node_xmit_skb net/tipc/node.c:1712 [inline]
 tipc_node_distr_xmit+0x2c7/0x3e0 net/tipc/node.c:1727
 tipc_sk_backlog_rcv+0x12f/0x1b0 net/tipc/socket.c:2383
 sk_backlog_rcv include/net/sock.h:996 [inline]
 __release_sock+0x1b2/0x480 net/core/sock.c:2550
 release_sock+0x5d/0x1c0 net/core/sock.c:3066
 tipc_release+0x1182/0x1440 net/tipc/socket.c:638
 __sock_release net/socket.c:605 [inline]
 sock_close+0xd8/0x260 net/socket.c:1278
 __fput+0x2f0/0x750 fs/file_table.c:281
 task_work_run+0x137/0x1c0 kernel/task_work.c:135
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop arch/x86/entry/common.c:216 [inline]
 __prepare_exit_to_usermode+0x14c/0x1e0 arch/x86/entry/common.c:246
 do_syscall_64+0x7f/0xe0 arch/x86/entry/common.c:368
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45cb29
Code: Bad RIP value.
RSP: 002b:00007f6ce4c3cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000021
RAX: 0000000000000004 RBX: 00000000004dbfa0 RCX: 000000000045cb29
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000006
RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008
R13: 00000000000000a4 R14: 00000000004c36c8 R15: 00007f6ce4c3d6d4
NMI backtrace for cpu 0
CPU: 0 PID: 21340 Comm: syz-executor.2 Not tainted 5.8.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:pvclock_read_begin arch/x86/include/asm/pvclock.h:23 [inline]
RIP: 0010:pvclock_clocksource_read+0x70/0x6b0 arch/x86/kernel/pvclock.c:75
Code: 89 c0 48 c1 e8 03 48 89 44 24 60 48 89 c8 48 89 4c 24 40 48 c1 e9 03 48 89 4c 24 58 49 8d 41 03 48 89 44 24 38 48 89 54 24 48 <43> 0f b6 04 33 84 c0 0f 85 35 01 00 00 42 0f b6 04 32 84 c0 0f 85
RSP: 0018:ffffc90000007a58 EFLAGS: 00000803
RAX: ffffffff8ab5001b RBX: ffffffff89309768 RCX: 1ffffffff156a001
RDX: 1ffffffff156a000 RSI: ffffffff8ab5001c RDI: ffffffff8ab5001d
RBP: ffffc90000007db0 R08: ffffffff8ab50008 R09: ffffffff8ab50018
R10: ffffffff8ab50003 R11: 1ffffffff156a000 R12: dffffc0000000000
R13: ffffffff8ab50000 R14: dffffc0000000000 R15: ffffffff8ab50010
FS:  00007f6ce4c3d700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000400200 CR3: 000000003c609000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 kvm_clock_read arch/x86/kernel/kvmclock.c:90 [inline]
 kvm_sched_clock_read+0x15/0x40 arch/x86/kernel/kvmclock.c:102
 paravirt_sched_clock arch/x86/include/asm/paravirt.h:22 [inline]
 sched_clock+0x36/0x40 arch/x86/kernel/tsc.c:252
 sched_clock_cpu+0x18/0x3b0 kernel/sched/clock.c:371
 local_clock include/linux/sched/clock.h:84 [inline]
 cpu_clock_event_update kernel/events/core.c:10207 [inline]
 cpu_clock_event_read+0x17/0x50 kernel/events/core.c:10240
 perf_swevent_hrtimer+0xb3/0x4e0 kernel/events/core.c:10123
 __run_hrtimer kernel/time/hrtimer.c:1520 [inline]
 __hrtimer_run_queues+0x42d/0x930 kernel/time/hrtimer.c:1584
 hrtimer_interrupt+0x373/0xd60 kernel/time/hrtimer.c:1646
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline]
 __sysvec_apic_timer_interrupt+0xf0/0x260 arch/x86/kernel/apic/apic.c:1097
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 sysvec_apic_timer_interrupt+0xb9/0x130 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:596
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:217 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x4/0xa0 kernel/kcov.c:284
Code: c1 e0 03 48 83 c8 18 48 89 34 01 4c 89 44 f9 18 49 ff c2 4c 89 11 c3 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 4c 8b 04 24 <65> 48 8b 14 25 00 fe 01 00 65 8b 05 d8 7d 8d 7e a9 00 01 ff 00 74
RSP: 0018:ffffc900067aefd0 EFLAGS: 00000246
RAX: 1ffff1100998a000 RBX: 00000000000000af RCX: 0000000000040000
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff87dc88a3 R09: ffffffff839ccd63
R10: 0000000000000003 R11: ffff8880309541c0 R12: ffff88804cc4d14e
R13: dffffc0000000000 R14: ffff88804cc50000 R15: 00000000158731c1
 rht_bucket include/linux/rhashtable.h:290 [inline]
 __rhashtable_lookup include/linux/rhashtable.h:604 [inline]
 rhashtable_lookup include/linux/rhashtable.h:645 [inline]
 tipc_sk_lookup+0x263/0x7c0 net/tipc/socket.c:2971
 tipc_sk_rcv+0x2b8/0x1940 net/tipc/socket.c:2461
 tipc_node_xmit+0x257/0x10d0 net/tipc/node.c:1652
 tipc_node_xmit_skb+0x110/0x150 net/tipc/node.c:1712
 tipc_sk_rcv+0x16f4/0x1940 net/tipc/socket.c:2491
 tipc_node_xmit+0x257/0x10d0 net/tipc/node.c:1652
 tipc_sk_push_backlog net/tipc/socket.c:1303 [inline]
 tipc_sk_filter_connect net/tipc/socket.c:2226 [inline]
 tipc_sk_filter_rcv+0x1660/0x3ca0 net/tipc/socket.c:2335
 tipc_sk_enqueue net/tipc/socket.c:2415 [inline]
 tipc_sk_rcv+0x6e1/0x1940 net/tipc/socket.c:2466
 tipc_node_xmit+0x257/0x10d0 net/tipc/node.c:1652
 tipc_node_xmit_skb net/tipc/node.c:1712 [inline]
 tipc_node_distr_xmit+0x2c7/0x3e0 net/tipc/node.c:1727
 tipc_sk_backlog_rcv+0x12f/0x1b0 net/tipc/socket.c:2383
 sk_backlog_rcv include/net/sock.h:996 [inline]
 __release_sock+0x1b2/0x480 net/core/sock.c:2550
 release_sock+0x5d/0x1c0 net/core/sock.c:3066
 tipc_release+0x1182/0x1440 net/tipc/socket.c:638
 __sock_release net/socket.c:605 [inline]
 sock_close+0xd8/0x260 net/socket.c:1278
 __fput+0x2f0/0x750 fs/file_table.c:281
 task_work_run+0x137/0x1c0 kernel/task_work.c:135
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop arch/x86/entry/common.c:216 [inline]
 __prepare_exit_to_usermode+0x14c/0x1e0 arch/x86/entry/common.c:246
 do_syscall_64+0x7f/0xe0 arch/x86/entry/common.c:368
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45cb29
Code: Bad RIP value.
RSP: 002b:00007f6ce4c3cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000021
RAX: 0000000000000004 RBX: 00000000004dbfa0 RCX: 000000000045cb29
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000006
RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008
R13: 00000000000000a4 R14: 00000000004c36c8 R15: 00007f6ce4c3d6d4