watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor2:4513] Modules linked in: irq event stamp: 15914616 hardirqs last enabled at (15914615): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (15914615): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (15914615): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (15914615): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (15914615): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (15914616): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (15914162): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (15914155): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (15914155): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4513 Comm: syz-executor2 Not tainted 4.17.0-rc4+ #14 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:783 [inline] RIP: 0010:lock_acquire+0x257/0x520 kernel/locking/lockdep.c:3923 RSP: 0018:ffff8801a2d1f8d8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff100345a3f20 RCX: 0000000000000000 RDX: 1ffffffff11a316d RSI: ffff8801a2d14df8 RDI: 0000000000000286 RBP: ffff8801a2d1f9c8 R08: 000000000000627a R09: 0000000000000003 R10: ffff8801a2d14e70 R11: ffff8801a2d145c0 R12: ffff8801a2d145c0 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 FS: 0000000001adc940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001ae5978 CR3: 00000001a3008000 CR4: 00000000001406f0 DR0: 00000000200001c0 DR1: 00000000200001c0 DR2: 00000000200001c0 DR3: 00000000200001c0 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:310 [inline] d_walk+0x261/0xc80 fs/dcache.c:1250 shrink_dcache_parent+0x179/0x230 fs/dcache.c:1486 vfs_rmdir+0x202/0x470 fs/namei.c:3850 do_rmdir+0x523/0x610 fs/namei.c:3911 __do_sys_rmdir fs/namei.c:3929 [inline] __se_sys_rmdir fs/namei.c:3927 [inline] __x64_sys_rmdir+0x36/0x40 fs/namei.c:3927 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455777 RSP: 002b:00007ffdaf269c08 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffdaf26b9b0 RDI: 00007ffdaf26b9b0 RBP: 00007ffdaf26b9b0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 0000000001add940 R13: 0000000000000000 R14: 0000000000000836 R15: 000000000005ba72 Code: 00 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 5e 02 00 00 48 83 3d e0 7c 74 07 00 0f 84 c8 01 00 00 48 8b bd 20 ff ff ff 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4517 Comm: syz-executor3 Not tainted 4.17.0-rc4+ #14 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:match_held_lock+0x1/0x8b0 kernel/locking/lockdep.c:3491 RSP: 0018:ffff8801daf073e8 EFLAGS: 00000002 RAX: 000000000000000a RBX: ffff8801a1c0cf08 RCX: 0000000000000000 RDX: ffffed003b5e0e64 RSI: ffff8801daf2c698 RDI: ffff8801a1c0cf08 RBP: ffff8801daf07438 R08: 0000000000000000 R09: ffffed003b5e46c2 R10: 0000000000000003 R11: 0000000000000004 R12: ffff8801a1c0c680 R13: ffffed00343819d6 R14: ffff8801a1c0ceb8 R15: 0000000000000002 FS: 0000000000f29940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000f32978 CR3: 00000001a23a2000 CR4: 00000000001406e0 DR0: 0000000020000000 DR1: 0000000020000080 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: lock_is_held_type+0x121/0x210 kernel/locking/lockdep.c:3958 lock_is_held include/linux/lockdep.h:344 [inline] rq_clock_task kernel/sched/sched.h:973 [inline] cfs_rq_clock_task kernel/sched/fair.c:4577 [inline] update_load_avg+0x1470/0x2570 kernel/sched/fair.c:3797 entity_tick kernel/sched/fair.c:4475 [inline] task_tick_fair+0xeb/0x320 kernel/sched/fair.c:9948 scheduler_tick+0x183/0x420 kernel/sched/core.c:3073 update_process_times+0x51/0x70 kernel/time/timer.c:1641 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+0x3e3/0x10a0 kernel/time/hrtimer.c:1460 hrtimer_interrupt+0x2f3/0x750 kernel/time/hrtimer.c:1518 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline] smp_apic_timer_interrupt+0x15d/0x710 arch/x86/kernel/apic/apic.c:1050 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:863 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:783 [inline] RIP: 0010:seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] RIP: 0010:read_seqcount_begin include/linux/seqlock.h:164 [inline] RIP: 0010:read_seqbegin include/linux/seqlock.h:433 [inline] RIP: 0010:read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] RIP: 0010:d_walk+0x840/0xc80 fs/dcache.c:1248 RSP: 0018:ffff8801a1c179f8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801a1c0c680 RBX: 0000000000000293 RCX: 1ffff100343819e5 RDX: 0000000000000000 RSI: ffffffff81c6995b RDI: 0000000000000293 RBP: ffff8801a1c17b78 R08: ffff8801a1c0ceb8 R09: 0000000000000006 R10: ffff8801a1c0c680 R11: 0000000000000000 R12: 0000000000000200 R13: dffffc0000000000 R14: 1ffff10034382f82 R15: ffff8801a1c17b50 shrink_dcache_parent+0x179/0x230 fs/dcache.c:1486 vfs_rmdir+0x202/0x470 fs/namei.c:3850 do_rmdir+0x523/0x610 fs/namei.c:3911 __do_sys_rmdir fs/namei.c:3929 [inline] __se_sys_rmdir fs/namei.c:3927 [inline] __x64_sys_rmdir+0x36/0x40 fs/namei.c:3927 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455777 RSP: 002b:00007fff30d3dbc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007fff30d3f970 RDI: 00007fff30d3f970 RBP: 00007fff30d3f970 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 0000000000f2a940 R13: 0000000000000000 R14: 0000000000000838 R15: 000000000005ba6f Code: 59 00 e9 59 ff ff ff 0f 0b e8 bc d7 59 00 eb 83 89 45 f4 e8 b2 d7 59 00 8b 45 f4 eb b5 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 55 <48> 89 e5 41 57 48 8d 95 38 ff ff ff 41 56 4c 8d 75 d8 41 55 48