rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=a76/1/0x4000000000000004 softirq=147182/147185 fqs=5228 
rcu: 	 (t=10502 jiffies g=192777 q=1542)
NMI backtrace for cpu 1
CPU: 1 PID: 2380 Comm: blkid Not tainted 5.1.0-rc6+ #158
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+0x172/0x1f0 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x183/0x1cf kernel/rcu/tree.c:1223
 print_cpu_stall kernel/rcu/tree.c:1360 [inline]
 check_cpu_stall kernel/rcu/tree.c:1434 [inline]
 rcu_pending kernel/rcu/tree.c:3103 [inline]
 rcu_sched_clock_irq.cold+0x500/0xa4a kernel/rcu/tree.c:2544
 update_process_times+0x32/0x80 kernel/time/timer.c:1635
 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:161
 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1271
 __run_hrtimer kernel/time/hrtimer.c:1389 [inline]
 __hrtimer_run_queues+0x33e/0xde0 kernel/time/hrtimer.c:1451
 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline]
 smp_apic_timer_interrupt+0x120/0x570 arch/x86/kernel/apic/apic.c:1060
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
RIP: 0010:rose_find_socket+0x4f/0x120 net/rose/af_rose.c:281
Code: 8b 25 45 21 d1 04 4d 85 e4 0f 84 ce 00 00 00 e8 47 08 2c fb 49 83 ec 68 0f 84 bf 00 00 00 48 bb 00 00 00 00 00 fc ff df eb 34 <e8> 2c 08 2c fb 49 8d 7c 24 68 48 89 f8 48 c1 e8 03 80 3c 18 00 0f
RSP: 0000:ffff8880ae907c90 EFLAGS: 00000217 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000302 RBX: dffffc0000000000 RCX: ffffffff86448546
RDX: 00000000fffff034 RSI: 0000000000000000 RDI: 0000000000000004
RBP: ffff8880ae907cb8 R08: ffff88805f06a500 R09: ffffed1015d20f80
R10: ffffed1015d20f7f R11: 0000000000000003 R12: ffff88805f0da2c0
R13: 00000000fffff034 R14: ffff8882166b45c0 R15: 0000000000000000
 rose_loopback_timer+0x336/0x480 net/rose/rose_loopback.c:94
 call_timer_fn+0x190/0x720 kernel/time/timer.c:1325
 expire_timers kernel/time/timer.c:1362 [inline]
 __run_timers kernel/time/timer.c:1681 [inline]
 __run_timers kernel/time/timer.c:1649 [inline]
 run_timer_softirq+0x652/0x1700 kernel/time/timer.c:1694
 __do_softirq+0x266/0x95a kernel/softirq.c:293
 invoke_softirq kernel/softirq.c:374 [inline]
 irq_exit+0x180/0x1d0 kernel/softirq.c:414
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x14a/0x570 arch/x86/kernel/apic/apic.c:1062
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
 </IRQ>
RIP: 0010:__sanitizer_cov_trace_pc+0x26/0x50 kernel/kcov.c:102
Code: 90 90 90 90 55 48 89 e5 48 8b 75 08 65 48 8b 04 25 00 ee 01 00 65 8b 15 68 60 91 7e 81 e2 00 01 1f 00 75 2b 8b 90 e0 12 00 00 <83> fa 02 75 20 48 8b 88 e8 12 00 00 8b 80 e4 12 00 00 48 8b 11 48
RSP: 0000:ffff88804ac0fb90 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: ffff88805f06a500 RBX: ffffea0000260d48 RCX: ffffffff818b5d37
RDX: 0000000000000000 RSI: ffffffff818b5d45 RDI: 0000000000000007
RBP: ffff88804ac0fb90 R08: ffff88805f06a500 R09: ffffed1015d25bc0
R10: ffffed1015d25bbf R11: ffff8880ae92ddfb R12: ffffea0000260d00
R13: 0000000000000000 R14: ffffea0000260d00 R15: ffff88804ac0fca8
 constant_test_bit arch/x86/include/asm/bitops.h:314 [inline]
 PageUptodate include/linux/page-flags.h:492 [inline]
 filemap_map_pages+0xd55/0x11e0 mm/filemap.c:2729
 do_fault_around mm/memory.c:3411 [inline]
 do_read_fault mm/memory.c:3445 [inline]
 do_fault mm/memory.c:3579 [inline]
 handle_pte_fault mm/memory.c:3810 [inline]
 __handle_mm_fault+0x31ed/0x3ec0 mm/memory.c:3934
 handle_mm_fault+0x43f/0xb30 mm/memory.c:3971
 do_user_addr_fault arch/x86/mm/fault.c:1475 [inline]
 __do_page_fault+0x5ef/0xda0 arch/x86/mm/fault.c:1541
 do_page_fault+0x71/0x581 arch/x86/mm/fault.c:1572
 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1143
RIP: 0033:0x7fe3b858d4c0
Code: Bad RIP value.
RSP: 002b:00007ffc3ac58928 EFLAGS: 00010297
RAX: 0000000000000000 RBX: 0000000076036300 RCX: 0000000000000008
RDX: 0000000000000044 RSI: 00007fe3b86a27a0 RDI: 00007ffc3ac58930
RBP: 0000000000000003 R08: 00007fe3b85e8840 R09: 0000000000000006
R10: 00007ffc3ac587a0 R11: 00007ffc3ac587a0 R12: 00007ffc3ac5899e
R13: 00000000000000bc R14: 00007ffc3ac5899f R15: 00007ffc3ac5899e