rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (10501 ticks this GP) idle=777/1/0x4000000000000000 softirq=96752/96752 fqs=23
(t=10502 jiffies g=127293 q=510)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10456 jiffies! g127293 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=55707
rcu: rcu_preempt kthread starved for 10459 jiffies! g127293 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:
task:rcu_preempt state:I stack:26424 pid: 16 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5073 [inline]
__schedule+0x957/0xec0 kernel/sched/core.c:6388
schedule+0xeb/0x1b0 kernel/sched/core.c:6460
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1884
rcu_gp_fqs_loop+0x2b9/0xfb0 kernel/rcu/tree.c:1971
rcu_gp_kthread+0xa5/0x360 kernel/rcu/tree.c:2144
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3691 Comm: kworker/u4:5 Not tainted 5.18.0-rc6-syzkaller-00161-gbc403203d65a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: tipc_rcv tipc_conn_recv_work
RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
RIP: 0010:kvm_wait+0x1b0/0x1f0 arch/x86/kernel/kvm.c:1015
Code: 4c 89 e0 48 c1 e8 03 42 8a 04 28 84 c0 75 41 45 8a 34 24 e8 22 20 52 00 44 3a 74 24 1c 75 10 eb 07 0f 00 2d f2 7a 4f 09 fb f4 cc fe ff ff fb e9 c6 fe ff ff 44 89 e1 80 e1 07 38 c1 0f 8c 57
RSP: 0018:ffffc90003c0f720 EFLAGS: 00000246
RAX: a23e2df12d8f9700 RBX: 1ffff92000781ee8 RCX: ffffffff81676828
RDX: dffffc0000000000 RSI: ffffffff8a8d0480 RDI: ffffffff8ae88f20
RBP: ffffc90003c0f7f0 R08: dffffc0000000000 R09: fffffbfff1f6441f
R10: fffffbfff1f6441f R11: 1ffffffff1f6441e R12: ffff88801693d858
R13: dffffc0000000000 R14: 1ffff92000781e03 R15: ffffc90003c0f760
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f603780d718 CR3: 0000000016b52000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
pv_wait arch/x86/include/asm/paravirt.h:603 [inline]
pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
__pv_queued_spin_lock_slowpath+0x6ce/0xc50 kernel/locking/qspinlock.c:508
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:591 [inline]
queued_spin_lock_slowpath+0x42/0x50 arch/x86/include/asm/qspinlock.h:51
queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
do_raw_spin_lock+0x264/0x360 kernel/locking/spinlock_debug.c:115
spin_lock_bh include/linux/spinlock.h:354 [inline]
tipc_conn_kref_release net/tipc/topsrv.c:129 [inline]
kref_put include/linux/kref.h:65 [inline]
conn_put+0x72/0x340 net/tipc/topsrv.c:147
tipc_conn_recv_work+0x484/0x4e0 net/tipc/topsrv.c:430
process_one_work+0x81c/0xd10 kernel/workqueue.c:2289
worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30
NMI backtrace for cpu 0
CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.18.0-rc6-syzkaller-00161-gbc403203d65a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x473/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x168/0x280 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x236/0x3a0 kernel/rcu/tree_stall.h:343
print_cpu_stall kernel/rcu/tree_stall.h:639 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:723 [inline]
rcu_pending kernel/rcu/tree.c:3923 [inline]
rcu_sched_clock_irq+0xf1b/0x18d0 kernel/rcu/tree.c:2625
update_process_times+0x197/0x200 kernel/time/timer.c:1788
tick_sched_handle kernel/time/tick-sched.c:243 [inline]
tick_sched_timer+0x377/0x540 kernel/time/tick-sched.c:1473
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x4cb/0xa60 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x3a6/0xfd0 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0xf9/0x280 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:tipc_topsrv_stop net/tipc/topsrv.c:690 [inline]
RIP: 0010:tipc_topsrv_exit_net+0x12b/0x310 net/tipc/topsrv.c:715
Code: 13 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 e8 db d1 b7 f7 48 b8 00 00 00 00 00 fc ff df 0f b6 04 03 84 c0 75 10 41 83 3f 00 <74> 21 e8 be d1 b7 f7 41 ff c6 eb 99 44 89 f9 80 e1 07 80 c1 03 38
RSP: 0018:ffffc900000d7b10 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 1ffff11002d27b13 RCX: ffff88813fe8d880
RDX: 0000000000000000 RSI: ffffffffc90e64fb RDI: 000000000000003f
RBP: ffff88807f33d800 R08: ffffffff845c932a R09: fffff5200001af50
R10: fffff5200001af51 R11: 1ffff9200001af50 R12: ffff88801693d800
R13: ffff88801693d858 R14: 00000000c90e64fb R15: ffff88801693d898
ops_exit_list net/core/net_namespace.c:162 [inline]
cleanup_net+0x758/0xc50 net/core/net_namespace.c:594
process_one_work+0x81c/0xd10 kernel/workqueue.c:2289
worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30
----------------
Code disassembly (best guess):
0: 4c 89 e0 mov %r12,%rax
3: 48 c1 e8 03 shr $0x3,%rax
7: 42 8a 04 28 mov (%rax,%r13,1),%al
b: 84 c0 test %al,%al
d: 75 41 jne 0x50
f: 45 8a 34 24 mov (%r12),%r14b
13: e8 22 20 52 00 callq 0x52203a
18: 44 3a 74 24 1c cmp 0x1c(%rsp),%r14b
1d: 75 10 jne 0x2f
1f: eb 07 jmp 0x28
21: 0f 00 2d f2 7a 4f 09 verw 0x94f7af2(%rip) # 0x94f7b1a
28: fb sti
29: f4 hlt
* 2a: e9 cc fe ff ff jmpq 0xfffffefb <-- trapping instruction
2f: fb sti
30: e9 c6 fe ff ff jmpq 0xfffffefb
35: 44 89 e1 mov %r12d,%ecx
38: 80 e1 07 and $0x7,%cl
3b: 38 c1 cmp %al,%cl
3d: 0f .byte 0xf
3e: 8c .byte 0x8c
3f: 57 push %rdi