EPT pointer = 0x000000006b03901e Virtual processor ID = 0x0001 watchdog: BUG: soft lockup - CPU#2 stuck for 22s! [syz-executor7:3496] Modules linked in: irq event stamp: 18872133 hardirqs last enabled at (18872132): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (18872132): [] _raw_spin_unlock_irq+0x27/0x70 kernel/locking/spinlock.c:199 hardirqs last disabled at (18872133): [] apic_timer_interrupt+0x98/0xb0 arch/x86/entry/entry_64.S:577 softirqs last enabled at (78): [] __do_softirq+0x74d/0xbd0 kernel/softirq.c:310 softirqs last disabled at (269): [] invoke_softirq kernel/softirq.c:364 [inline] softirqs last disabled at (269): [] irq_exit+0x1d3/0x210 kernel/softirq.c:405 CPU: 2 PID: 3496 Comm: syz-executor7 Not tainted 4.13.0-rc6-next-20170822+ #6 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 task: ffff88003e30e440 task.stack: ffff880038d98000 RIP: 0010:__preempt_count_sub arch/x86/include/asm/preempt.h:80 [inline] RIP: 0010:rcu_lockdep_current_cpu_online+0x131/0x190 kernel/rcu/tree.c:1180 RSP: 0018:ffff88006de075b8 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000001 RBX: 1ffff1000dbc0eb7 RCX: 0000000000000000 RDX: 1ffff1000dbc0ebb RSI: ffffed000dbc0e96 RDI: ffffffff85b3b220 RBP: ffff88006de07640 R08: 1ffffffff0b00952 R09: 0000000000000001 R10: 0000000000000020 R11: ffffffff8727abe0 R12: 1ffff1000dbc0ebb R13: 000000000000000f R14: ffff88006de07618 R15: 0000000000000004 FS: 00007f289c73b700(0000) GS:ffff88006de00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001ddbc23000 CR3: 000000006a33c000 CR4: 00000000000006e0 Call Trace: rcu_read_lock_sched_held+0x9a/0x120 kernel/rcu/update.c:113 wq_watchdog_timer_fn+0x525/0x7a0 kernel/workqueue.c:5401 call_timer_fn+0x246/0x850 kernel/time/timer.c:1275 expire_timers kernel/time/timer.c:1314 [inline] __run_timers+0x7fd/0xb90 kernel/time/timer.c:1608 run_timer_softirq+0x67/0x80 kernel/time/timer.c:1623 __do_softirq+0x2bb/0xbd0 kernel/softirq.c:284 invoke_softirq kernel/softirq.c:364 [inline] irq_exit+0x1d3/0x210 kernel/softirq.c:405 exiting_irq arch/x86/include/asm/apic.h:638 [inline] smp_apic_timer_interrupt+0x76/0xa0 arch/x86/kernel/apic/apic.c:1044 apic_timer_interrupt+0x9d/0xb0 arch/x86/entry/entry_64.S:577 RIP: 0010:arch_local_irq_enable arch/x86/include/asm/paravirt.h:824 [inline] RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] RIP: 0010:_raw_spin_unlock_irq+0x56/0x70 kernel/locking/spinlock.c:199 RSP: 0018:ffff880038d9fa18 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: dffffc0000000000 RBX: ffff88006de25c00 RCX: 0000000000000000 RDX: 1ffffffff0b5915f RSI: 0000000000000001 RDI: ffffffff85ac8af8 RBP: ffff880038d9fa20 R08: ffff880038d9f3a0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff880061270300 R13: 1ffff100071b3f4c R14: ffff88003e30e440 R15: ffff88003e30e440 finish_lock_switch kernel/sched/sched.h:1331 [inline] finish_task_switch+0x1d3/0x740 kernel/sched/core.c:2653 context_switch kernel/sched/core.c:2795 [inline] __schedule+0x8f0/0x2070 kernel/sched/core.c:3371 schedule+0x108/0x440 kernel/sched/core.c:3430 exit_to_usermode_loop+0x1e1/0x300 arch/x86/entry/common.c:151 prepare_exit_to_usermode+0x267/0x2c0 arch/x86/entry/common.c:197 retint_user+0x8/0x23 RIP: 0033:0x406233 RSP: 002b:00007f289c73ad00 EFLAGS: 00000217 ORIG_RAX: ffffffffffffff02 RAX: 0000000000000000 RBX: 0000000000708170 RCX: 0000000000446749 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000708170 RBP: 0000000000708150 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f289c73b9c0 R15: 00007f289c73b700 Code: 00 75 5e 49 c1 ec 03 48 b8 00 00 00 00 00 fc ff df 4d 85 ef 4d 89 6e c0 41 c6 04 04 f8 b8 01 00 00 00 74 30 65 ff 0d 5f 09 a6 7e <48> ba 00 00 00 00 00 fc ff df 48 c7 04 13 00 00 00 00 c7 44 1a