INFO: rcu detected stall in __do

Kernel	Title	Repro	Cause bisect	Count	Last	Reported	Patched	Status
linux-5.15	INFO: rcu detected stall in __do_softirq			2	176d	195d	0/3	auto-obsoleted due to no activity on 2024/02/08 12:45
linux-4.19	INFO: rcu detected stall in __do_softirq (2)			9	1320d	1505d	0/1	auto-closed as invalid on 2021/01/10 17:25
linux-4.14	INFO: rcu detected stall in __do_softirq			1	1773d	1773d	0/1	auto-closed as invalid on 2019/10/25 08:47
upstream	INFO: rcu detected stall in __do_softirq net	syz	done	35	491d	1724d	0/26	auto-obsoleted due to no activity on 2023/04/21 04:43

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: (detected by 1, t=30025 jiffies, g=57045, q=389) rcu: All QSes seen, last rcu_preempt kthread activity 30025 (4295005994-4294975969), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor.4 R running task 28088 20573 7495 0x00000008 Call Trace: <IRQ> sched_show_task kernel/sched/core.c:5297 [inline] sched_show_task.cold+0x2ee/0x35d kernel/sched/core.c:5272 print_other_cpu_stall kernel/rcu/tree.c:1430 [inline] check_cpu_stall kernel/rcu/tree.c:1557 [inline] __rcu_pending kernel/rcu/tree.c:3293 [inline] rcu_pending kernel/rcu/tree.c:3336 [inline] rcu_check_callbacks.cold+0xaa1/0xd90 kernel/rcu/tree.c:2682 update_process_times+0x32/0x80 kernel/time/timer.c:1636 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:164 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1274 __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0x33b/0xdc0 kernel/time/hrtimer.c:1460 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1518 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1029 [inline] smp_apic_timer_interrupt+0x111/0x550 arch/x86/kernel/apic/apic.c:1054 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:ffs arch/x86/include/asm/bitops.h:416 [inline] RIP: 0010:__do_softirq+0x227/0x921 kernel/softirq.c:280 Code: c7 c0 d8 44 72 88 48 c1 e8 03 42 80 3c 38 00 0f 85 a7 06 00 00 48 83 3d be 42 52 01 00 0f 84 bb 05 00 00 fb 66 0f 1f 44 00 00 <b8> ff ff ff ff 48 c7 45 c8 00 91 60 88 0f bc 45 d4 83 c0 01 89 45 RSP: 0018:ffff8880ae907f10 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff10e489b RBX: ffff88805c176440 RCX: 1ffff1100b82ed9c RDX: 0000000000000000 RSI: ffff88805c176ce8 RDI: ffff88805c176cbc RBP: ffff8880ae907f98 R08: ffff88805c176440 R09: ffff88805c176ce0 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88808de97968 R13: 0000000000000027 R14: 0000000000000027 R15: dffffc0000000000 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] do_IRQ+0x113/0x1d0 arch/x86/kernel/irq.c:258 common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:670 </IRQ> RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:23 [inline] RIP: 0010:static_key_false include/linux/jump_label.h:138 [inline] RIP: 0010:lapic_in_kernel arch/x86/kvm/lapic.h:159 [inline] RIP: 0010:kvm_apic_present arch/x86/kvm/lapic.h:184 [inline] RIP: 0010:kvm_lapic_enabled arch/x86/kvm/lapic.h:189 [inline] RIP: 0010:vcpu_enter_guest+0x258f/0x6120 arch/x86/kvm/x86.c:7594 Code: c8 7f 08 84 c0 0f 85 9f 31 00 00 41 0f b6 9c 24 44 2c 00 00 31 ff 89 de e8 4e ce 5e 00 84 db 0f 85 08 7e 01 00 e8 01 cd 5e 00 <e9> 9b 04 00 00 e8 f7 cc 5e 00 49 8d bc 24 e0 03 00 00 48 b8 00 00 RSP: 0018:ffff88808de97a10 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffd8 RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc9000e6c3000 RDX: 0000000000040000 RSI: ffffffff810c922f RDI: 0000000000000001 RBP: ffff88808de97b20 R08: ffff88805c176440 R09: 0000000000000001 R10: ffff88808de97b38 R11: 00000000c89a0c80 R12: ffff888054be1680 R13: ffff888054be5b04 R14: 0000000000000000 R15: ffff888054be16b0 vcpu_run arch/x86/kvm/x86.c:7798 [inline] kvm_arch_vcpu_ioctl_run+0x457/0x16b0 arch/x86/kvm/x86.c:7998 kvm_vcpu_ioctl+0x4dc/0xf90 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2617 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xd5f/0x1380 fs/ioctl.c:688 ksys_ioctl+0xab/0xd0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459829 Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f019ea61c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459829 RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000009 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f019ea626d4 R13: 00000000004c2bcf R14: 00000000004d6210 R15: 00000000ffffffff rcu: rcu_preempt kthread starved for 30025 jiffies! g57045 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 29024 10 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3474 schedule+0x92/0x1c0 kernel/sched/core.c:3518 schedule_timeout+0x4db/0xfc0 kernel/time/timer.c:1804 rcu_gp_kthread+0xd5c/0x2190 kernel/rcu/tree.c:2202 kthread+0x354/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415

Crashes (2):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2019/08/22 09:57	linux-4.19.y	a5aa80588fcd	4ea67ff8	.config	console log	report					ci2-linux-4-19
2019/06/18 23:12	linux-4.19.y	6500aa436df4	34bf9440	.config	console log	report					ci2-linux-4-19

Crashes (2):

Assets (help?)