watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor4:4520] Modules linked in: irq event stamp: 10824852 hardirqs last enabled at (10824851): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (10824851): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (10824851): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (10824851): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (10824851): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (10824852): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (1916168): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (1916115): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (1916115): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4520 Comm: syz-executor4 Not tainted 4.17.0-rc4+ #14 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:d_walk+0x4ca/0xc80 fs/dcache.c:1304 RSP: 0018:ffff8801a04779f8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffffed003408ef52 RBX: 0000000000000001 RCX: ffffffff81c69b47 RDX: 0000000000000000 RSI: ffffffff81c695e0 RDI: 0000000000000001 RBP: ffff8801a0477b78 R08: ffff8801a046c1c0 R09: ffffed003b5c46c2 R10: ffffed003b5c46c2 R11: ffff8801dae23613 R12: ffff880198adf600 R13: dffffc0000000000 R14: ffff8801c98bcc60 R15: ffff8801a0477b50 FS: 0000000001973940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcf077eeac CR3: 00000001a042b000 CR4: 00000000001406f0 DR0: 00000000200001c0 DR1: 00000000200001c0 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: 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:00007ffcf077f5b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffcf0781360 RDI: 00007ffcf0781360 RBP: 00007ffcf0781360 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 0000000001974940 R13: 0000000000000000 R14: 0000000000000208 R15: 000000000001afa1 Code: ff 31 ff 89 c3 89 c6 e8 d5 98 b2 ff 58 85 db 0f 85 41 05 00 00 4c 8b b5 a8 fe ff ff e8 b0 97 b2 ff 48 8b 85 c8 fe ff ff c6 00 04 <4c> 3b b5 b8 fe ff ff 0f 84 89 01 00 00 e8 94 97 b2 ff 49 8d 7e Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4519 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:rcu_lockdep_current_cpu_online+0x155/0x190 kernel/rcu/tree.c:1137 RSP: 0018:ffff8801daf07620 EFLAGS: 00000082 RAX: 0000000000000001 RBX: ffffffff8909b8a0 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffffffff88d91698 RBP: ffff8801daf07630 R08: ffffed003b5e46c3 R09: ffffed003b5e46c2 R10: ffffed003b5e46c2 R11: ffff8801daf23613 R12: 1ffff1003b5e0ecd R13: 0000000000000007 R14: ffff8801daf07608 R15: 0000000000000002 FS: 0000000001e43940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001e4c978 CR3: 00000001a1916000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_lock_sched_held+0x96/0x120 kernel/rcu/update.c:114 trace_softirq_raise include/trace/events/irq.h:156 [inline] __raise_softirq_irqoff kernel/softirq.c:443 [inline] raise_softirq_irqoff kernel/softirq.c:417 [inline] raise_softirq+0x37c/0x450 kernel/softirq.c:437 trigger_load_balance+0x1c4/0xaf0 kernel/sched/fair.c:9911 scheduler_tick+0x292/0x420 kernel/sched/core.c:3083 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:ffff8801a19379f8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801a192a180 RBX: 0000000000000293 RCX: 1ffff10034325545 RDX: 0000000000000000 RSI: ffffffff81c6995b RDI: 0000000000000293 RBP: ffff8801a1937b78 R08: ffff8801a192a9b8 R09: 0000000000000006 R10: ffff8801a192a180 R11: 0000000000000000 R12: 0000000000000200 R13: dffffc0000000000 R14: 1ffff10034326f82 R15: ffff8801a1937b50 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:00007ffcfbf970f8 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffcfbf98ea0 RDI: 00007ffcfbf98ea0 RBP: 00007ffcfbf98ea0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 0000000001e44940 R13: 0000000000000000 R14: 000000000000023a R15: 000000000001afa1 Code: 65 ff 0d 6f 75 9d 7e 48 ba 00 00 00 00 00 fc ff df 48 01 d3 48 c7 03 00 00 00 00 c7 43 08 00 00 00 00 48 83 c4 60 5b 41 5c 41 5d <41> 5e 41 5f 5d c3 8b 05 df 92 17 08 85 c0 0f 94 c0 eb c2 4c 89