watchdog: BUG: soft lockup - CPU#1 stuck for 21s! [syz-executor.0:9556] Modules linked in: irq event stamp: 7075809 hardirqs last enabled at (7075808): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (7075808): [] _raw_spin_unlock_irqrestore+0x82/0xd0 kernel/locking/spinlock.c:184 hardirqs last disabled at (7075809): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (132): [] rcu_read_unlock_bh include/linux/rcupdate.h:717 [inline] softirqs last enabled at (132): [] __dev_queue_xmit+0x1276/0x2a80 net/core/dev.c:3865 softirqs last disabled at (185): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (185): [] irq_exit+0x17f/0x1c0 kernel/softirq.c:412 CPU: 1 PID: 9556 Comm: syz-executor.0 Not tainted 4.19.195-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xaf/0xd0 kernel/locking/spinlock.c:184 Code: 08 01 12 88 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 28 48 83 3d f0 48 88 01 00 74 15 48 89 df 57 9d <0f> 1f 44 00 00 eb ad e8 bf 98 76 fa eb bb 0f 0b 0f 0b e8 fa a1 06 RSP: 0018:ffff8881f6907bb8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 0000000000000286 RCX: 1ffff110374f353a RDX: 1ffffffff1024021 RSI: ffff8881ba79a9b0 RDI: 0000000000000286 RBP: ffff8881f6907bc8 R08: ffff8881ba79a9d0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881f6923a00 R13: ffff8881c82cf0b0 R14: 00000000ffffdc22 R15: ffff8881f6923a00 FS: 00007fb23daa3700(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000052c000 CR3: 00000001c2630005 CR4: 00000000001606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __mod_timer kernel/time/timer.c:1071 [inline] mod_timer+0x463/0xe00 kernel/time/timer.c:1114 pie_timer+0x402/0x670 net/sched/sch_pie.c:438 call_timer_fn+0x14c/0x510 kernel/time/timer.c:1338 expire_timers kernel/time/timer.c:1375 [inline] __run_timers kernel/time/timer.c:1696 [inline] __run_timers kernel/time/timer.c:1664 [inline] run_timer_softirq+0xb63/0x1180 kernel/time/timer.c:1709 __do_softirq+0x25f/0x919 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x13e/0x540 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xaf/0xd0 kernel/locking/spinlock.c:184 Code: 08 01 12 88 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 28 48 83 3d f0 48 88 01 00 74 15 48 89 df 57 9d <0f> 1f 44 00 00 eb ad e8 bf 98 76 fa eb bb 0f 0b 0f 0b e8 fa a1 06 RSP: 0018:ffff8881a97ff938 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 0000000000000286 RCX: 0000000000000000 RDX: 1ffffffff1024021 RSI: 0000000000000001 RDI: 0000000000000286 RBP: ffff8881a97ff948 R08: ffffed103568597a R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881ab42cbc8 R13: ffff8881ab42c400 R14: ffff8881f692c380 R15: 0000000000000001 try_to_wake_up+0xc2/0xf20 kernel/sched/core.c:2056 wake_up_process kernel/sched/core.c:2124 [inline] wake_up_q+0xa4/0x100 kernel/sched/core.c:442 futex_wake+0x340/0x5a0 kernel/futex.c:1706 do_futex+0x5aa/0x1530 kernel/futex.c:3894 __do_sys_futex kernel/futex.c:3950 [inline] __se_sys_futex kernel/futex.c:3918 [inline] __x64_sys_futex+0x1cb/0x3a0 kernel/futex.c:3918 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x461209 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb23daa3218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 000000000052bfb0 RCX: 0000000000461209 RDX: 00000000004b240a RSI: 0000000000000081 RDI: 000000000052bfb4 RBP: 000000000052bfa8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000006 R11: 0000000000000246 R12: 000000000052bfb4 R13: 00007ffc6fcd8f4f R14: 00007fb23daa3300 R15: 0000000000022000