watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [kworker/0:13:3571] Modules linked in: irq event stamp: 113804 hardirqs last enabled at (113803): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:596 hardirqs last disabled at (113804): [] idtentry_enter_cond_rcu+0x2e/0x50 arch/x86/entry/common.c:607 softirqs last enabled at (113436): [] asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711 softirqs last disabled at (113427): [] asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711 CPU: 0 PID: 3571 Comm: kworker/0:13 Not tainted 5.8.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events fqdir_work_fn RIP: 0010:csd_lock_wait kernel/smp.c:108 [inline] RIP: 0010:smp_call_function_single+0x302/0x450 kernel/smp.c:382 Code: 2f 44 89 ee 83 e6 01 31 ff e8 6a 04 0b 00 41 83 e5 01 75 14 e8 4f 00 0b 00 eb 45 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 f3 90 <42> 0f b6 04 23 84 c0 75 0d 41 f6 07 01 74 22 e8 2a 00 0b 00 eb e8 RSP: 0018:ffffc90017877be0 EFLAGS: 00000293 RAX: ffffffff81697be6 RBX: 1ffff92002f0ef81 RCX: ffff88803e8ce400 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90017877c68 R08: ffffffff81697bb6 R09: ffffed1015d26d11 R10: ffffed1015d26d11 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000001 R14: 0000000000000000 R15: ffffc90017877c08 FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f43e36ed030 CR3: 0000000043719000 CR4: 00000000001406f0 DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: rcu_barrier+0x2ae/0x4d0 kernel/rcu/tree.c:3635 fqdir_work_fn+0x5e/0xe0 net/ipv4/inet_fragment.c:159 process_one_work+0x789/0xfc0 kernel/workqueue.c:2269 worker_thread+0xaa4/0x1460 kernel/workqueue.c:2415 kthread+0x37e/0x3a0 drivers/block/aoe/aoecmd.c:1234 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 9259 Comm: syz-executor.1 Not tainted 5.8.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:arch_local_save_flags arch/x86/include/asm/paravirt.h:760 [inline] RIP: 0010:arch_local_irq_save+0x37/0x80 arch/x86/include/asm/paravirt.h:782 Code: 03 49 be 00 00 00 00 00 fc ff df 42 80 3c 30 00 74 0c 48 c7 c7 e8 c7 2b 89 e8 35 4c 5a 00 48 83 3d 15 99 d2 07 00 74 40 9c 58 <0f> 1f 44 00 00 48 89 c3 48 c7 c0 f8 c7 2b 89 48 c1 e8 03 42 80 3c RSP: 0018:ffffc90000da8d38 EFLAGS: 00000082 RAX: 0000000000000082 RBX: 0000000000000000 RCX: 0000000080010002 RDX: ffff8880194c85c0 RSI: 00000000ffffffff RDI: ffffffff892e9460 RBP: ffff8880194c8e78 R08: ffffffff816539bb R09: fffffbfff12da576 R10: fffffbfff12da576 R11: 0000000000000000 R12: ffff8880194c85c0 R13: ffffffff892e9460 R14: dffffc0000000000 R15: 1ffff1100752bd6f FS: 00007f492f32f700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020002000 CR3: 000000000dcb4000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_is_held_type+0x2d/0xe0 kernel/locking/lockdep.c:4992 lock_is_held include/linux/lockdep.h:425 [inline] rcu_read_lock_sched_held+0x2f/0xa0 kernel/rcu/update.c:135 trace_hrtimer_expire_exit+0x21b/0x2b0 include/trace/events/timer.h:279 __run_hrtimer kernel/time/hrtimer.c:1523 [inline] __hrtimer_run_queues+0x4a7/0x930 kernel/time/hrtimer.c:1584 hrtimer_interrupt+0x373/0xd60 kernel/time/hrtimer.c:1646 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline] __sysvec_apic_timer_interrupt+0xf0/0x260 arch/x86/kernel/apic/apic.c:1097 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] sysvec_apic_timer_interrupt+0xb9/0x130 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:596 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:765 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xa5/0xd0 kernel/locking/spinlock.c:191 Code: b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 0c 48 c7 c7 f0 c7 2b 89 e8 ea 7c 94 f9 48 83 3d d2 c9 0c 01 00 74 2c 4c 89 f7 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 cc 8b 31 f9 65 8b 05 d1 ff e2 77 RSP: 0018:ffffc90008a17e50 EFLAGS: 00000282 RAX: 1ffffffff12578fe RBX: ffffffff892ee3c8 RCX: dffffc0000000000 RDX: ffffc90003f69000 RSI: 0000000000000063 RDI: 0000000000000282 RBP: ffffffff81669716 R08: ffffffff817a1d20 R09: fffffbfff125dc7a R10: fffffbfff125dc7a R11: 0000000000000000 R12: 0000000018314e72 R13: 0000000000000282 R14: 0000000000000282 R15: dffffc0000000000 do_settimeofday64+0x419/0x520 kernel/time/timekeeping.c:1254 __do_sys_clock_settime kernel/time/posix-timers.c:1079 [inline] __se_sys_clock_settime kernel/time/posix-timers.c:1067 [inline] __x64_sys_clock_settime+0x196/0x1c0 kernel/time/posix-timers.c:1067 do_syscall_64+0x73/0xe0 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45cb29 Code: Bad RIP value. RSP: 002b:00007f492f32ec78 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3 RAX: ffffffffffffffda RBX: 00000000004db560 RCX: 000000000045cb29 RDX: 0000000000000000 RSI: 0000000020000400 RDI: 0000000000000000 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000007b R14: 00000000004c34ac R15: 00007f492f32f6d4