INFO: rcu detected stall in do

[upstream] INFO: rcu detected stall in do_idle
Status: upstream: reported C repro on 2018/10/13 07:31
Reported-by: syzbot+385468161961cee80c31@syzkaller.appspotmail.com
First: 154d, last: 1d04h

duplicates:
Title	Repro	Count	Last	Reported	Patched	Status
INFO: rcu detected stall in pagemap_read	C	2	72d	108d		closed as dup on 2018/11/07 15:39

Sample crash report:

sshd (5193) used greatest stack depth: 15496 bytes left
sched: DL replenish lagged too much
hrtimer: interrupt took 417330 ns
rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10520 jiffies, g=-1179, q=0)
rcu: All QSes seen, last rcu_sched kthread activity 10521 (4295005425-4294994904), jiffies_till_next_fqs=1, root ->qsmask 0x0
swapper/0       R  running task    21816     0      0 0x80000000
Call Trace:
 <IRQ>
 sched_show_task.cold.83+0x2b6/0x30a kernel/sched/core.c:5296
 print_other_cpu_stall.cold.79+0xa83/0xba5 kernel/rcu/tree.c:1430
 check_cpu_stall kernel/rcu/tree.c:1557 [inline]
 __rcu_pending kernel/rcu/tree.c:3276 [inline]
 rcu_pending kernel/rcu/tree.c:3319 [inline]
 rcu_check_callbacks+0xafc/0x1990 kernel/rcu/tree.c:2665
 update_process_times+0x2d/0x70 kernel/time/timer.c:1636
 tick_sched_handle+0x9f/0x180 kernel/time/tick-sched.c:164
 tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1274
 __run_hrtimer kernel/time/hrtimer.c:1398 [inline]
 __hrtimer_run_queues+0x41c/0x10d0 kernel/time/hrtimer.c:1460
 hrtimer_interrupt+0x313/0x780 kernel/time/hrtimer.c:1518
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1029 [inline]
 smp_apic_timer_interrupt+0x1a1/0x760 arch/x86/kernel/apic/apic.c:1054
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:864
RIP: 0010:arch_local_irq_enable arch/x86/include/asm/paravirt.h:798 [inline]
RIP: 0010:__do_softirq+0x2c3/0xad8 kernel/softirq.c:276
Code: c7 c0 98 f2 31 89 48 c1 e8 03 42 80 3c 30 00 0f 85 17 07 00 00 48 83 3d e2 ef 51 01 00 0f 84 6e 06 00 00 fb 66 0f 1f 44 00 00 <48> c7 85 68 fe ff ff 00 91 20 89 b8 ff ff ff ff 0f bc 85 74 fe ff
RSP: 0018:ffff8801dae07ae8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff1263e53 RBX: ffffffff89276e40 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff892776bc
RBP: ffff8801dae07cc8 R08: ffffffff89276e40 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff1003b5c0fa1
R13: ffffffff89276e40 R14: dffffc0000000000 R15: 0000000000000000
 invoke_softirq kernel/softirq.c:372 [inline]
 irq_exit+0x17f/0x1c0 kernel/softirq.c:412
 scheduler_ipi+0x55a/0xad0 kernel/sched/core.c:1780
 smp_reschedule_interrupt+0x109/0x650 arch/x86/kernel/smp.c:278
 reschedule_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:888
 </IRQ>
RIP: 0010:native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:57
Code: e9 2c ff ff ff 48 89 c7 48 89 45 d8 e8 e3 e0 11 fa 48 8b 45 d8 e9 ca fe ff ff 48 89 df e8 d2 e0 11 fa eb 82 55 48 89 e5 fb f4 <5d> c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 f4 5d c3 90 90 90 90 90
RSP: 0018:ffffffff89207bb8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff02
RAX: dffffc0000000000 RBX: 1ffffffff1240f7b RCX: 0000000000000000
RDX: 1ffffffff1263e54 RSI: 0000000000000001 RDI: ffffffff8931f2a0
RBP: ffffffff89207bb8 R08: ffffffff89276e40 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff89207c78
R13: ffffffff89f3be20 R14: 0000000000000000 R15: 0000000000000000
 arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline]
 default_idle+0xbf/0x490 arch/x86/kernel/process.c:498
 arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:489
 default_idle_call+0x6d/0x90 kernel/sched/idle.c:93
 cpuidle_idle_call kernel/sched/idle.c:153 [inline]
 do_idle+0x3db/0x5b0 kernel/sched/idle.c:262
 cpu_startup_entry+0x10c/0x120 kernel/sched/idle.c:368
 rest_init+0xe2/0xe5 init/main.c:442
 start_kernel+0x8f4/0x92f init/main.c:739
 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:470
 x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:451
 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243
rcu: rcu_sched kthread starved for 10601 jiffies! g-1179 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: RCU grace-period kthread stack dump:
rcu_sched       R  running task    25144    11      2 0x80000000
Call Trace:
 context_switch kernel/sched/core.c:2825 [inline]
 __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473
 schedule+0xfe/0x460 kernel/sched/core.c:3517
 schedule_timeout+0x140/0x260 kernel/time/timer.c:1804
 rcu_gp_kthread+0x9d9/0x2310 kernel/rcu/tree.c:2194
 kthread+0x35a/0x420 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413

All crashes (6):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Maintainers
ci-upstream-kasan-gce-smack-root	2018/10/13 03:22	upstream	6b3944e4	caf12900	.config	log	report	syz	C	bp@alien8.de, hpa@zytor.com, linux-kernel@vger.kernel.org, mingo@redhat.com, nstange@suse.de, tglx@linutronix.de, x86@kernel.org
ci-upstream-kasan-gce-selinux-root	2018/10/21 09:46	upstream	b0d04fb5	ecb386fe	.config	log	report	syz		fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce	2018/08/16 20:17	upstream	f91e6544	9ccc1d45	.config	log	report			fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-smack-root	2019/01/17 05:33	upstream	47bfa6d9	c2faf9b2	.config	log	report			alison.schofield@intel.com, bp@alien8.de, hpa@zytor.com, john.wanghui@huawei.com, konrad.wilk@oracle.com, linux-kernel@vger.kernel.org, m.mizuma@jp.fujitsu.com, mingo@redhat.com, prarit@redhat.com, puwen@hygon.cn, rppt@linux.vnet.ibm.com, tglx@linutronix.de, x86@kernel.org, yazen.ghannam@amd.com, zhenzhong.duan@oracle.com
ci-upstream-kasan-gce-smack-root	2018/12/17 15:30	upstream	7566ec39	def91db3	.config	log	report			alison.schofield@intel.com, bp@alien8.de, hpa@zytor.com, jan.kiszka@siemens.com, konrad.wilk@oracle.com, linux-kernel@vger.kernel.org, m.mizuma@jp.fujitsu.com, mingo@redhat.com, prarit@redhat.com, puwen@hygon.cn, rppt@linux.vnet.ibm.com, sneves@dei.uc.pt, tglx@linutronix.de, x86@kernel.org, zhenzhong.duan@oracle.com
ci-upstream-bpf-next-kasan-gce	2018/10/15 02:56	bpf-next	67e89ac3	caf12900	.config	log	report			bp@alien8.de, hpa@zytor.com, jroedel@suse.de, konrad.wilk@oracle.com, linux-kernel@vger.kernel.org, luto@kernel.org, mingo@redhat.com, namit@vmware.com, ndesaulniers@google.com, tglx@linutronix.de, thomas.lendacky@amd.com, x86@kernel.org