watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor4:4535] Modules linked in: irq event stamp: 10459556 hardirqs last enabled at (10459555): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (10459555): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (10459555): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (10459555): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (10459555): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (10459556): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (154634): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (154261): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (154261): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4535 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:arch_local_irq_restore arch/x86/include/asm/paravirt.h:783 [inline] RIP: 0010:lock_release+0x4d4/0xa10 kernel/locking/lockdep.c:3942 RSP: 0018:ffff8801a07178a0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff100340e2f19 RCX: 1ffff100340e1985 RDX: 1ffffffff11a316d RSI: 0000000000000005 RDI: 0000000000000286 RBP: ffff8801a07179d0 R08: 1ffff100340e2f1d R09: ffff8801a0717728 R10: 0000000000000003 R11: 0000000000000004 R12: ffff8801a070c400 R13: ffff8801b596d8d8 R14: ffff8801a070c400 R15: ffff8801a07178e8 FS: 0000000001860940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001869978 CR3: 00000001a06a1000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_unlock include/linux/spinlock_api_smp.h:150 [inline] _raw_spin_unlock+0x1a/0x30 kernel/locking/spinlock.c:176 spin_unlock include/linux/spinlock.h:350 [inline] d_walk+0x451/0xc80 fs/dcache.c:1298 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:00007ffd0a370958 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffd0a372700 RDI: 00007ffd0a372700 RBP: 00007ffd0a372700 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 0000000001861940 R13: 0000000000000000 R14: 00000000000000fb R15: 00000000000110e3 Code: 00 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 a3 03 00 00 48 83 3d 73 84 74 07 00 0f 84 b8 02 00 00 48 8b bd e8 fe 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: 4533 Comm: syz-executor5 Not tainted 4.17.0-rc4+ #14 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__lock_release kernel/locking/lockdep.c:3696 [inline] RIP: 0010:lock_release+0x2c1/0xa10 kernel/locking/lockdep.c:3939 RSP: 0018:ffff8801daf077f0 EFLAGS: 00000002 RAX: ffff8801a1982c00 RBX: 1ffff1003b5e0f03 RCX: 0000000000000000 RDX: 0000000000000007 RSI: ffffffff8a7158c8 RDI: ffff8801a1982c24 RBP: ffff8801daf07920 R08: ffffffff8a7158c8 R09: ffff8801daf07678 R10: ffffffff8a713a20 R11: 0000000000000006 R12: ffff8801daf078f8 R13: ffffffff8a7158c8 R14: ffff8801a1982300 R15: ffff8801daf07838 FS: 0000000001bcd940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001bd6978 CR3: 00000001a1968000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: write_seqcount_end include/linux/seqlock.h:387 [inline] update_wall_time+0x84f/0xbc0 kernel/time/timekeeping.c:2100 tick_do_update_jiffies64.part.17+0x194/0x290 kernel/time/tick-sched.c:97 tick_do_update_jiffies64 kernel/time/tick-sched.c:66 [inline] tick_sched_do_timer+0x167/0x1a0 kernel/time/tick-sched.c:135 tick_sched_timer+0x2c/0x130 kernel/time/tick-sched.c:1267 __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:lock_acquire+0x257/0x520 kernel/locking/lockdep.c:3923 RSP: 0018:ffff8801a198f8d8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff10034331f20 RCX: 0000000000000000 RDX: 1ffffffff11a316d RSI: ffff8801a1982b38 RDI: 0000000000000286 RBP: ffff8801a198f9c8 R08: 0000000000004077 R09: 0000000000000003 R10: ffff8801a1982bb0 R11: ffff8801a1982300 R12: ffff8801a1982300 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 __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:00007ffde389b848 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffde389d5f0 RDI: 00007ffde389d5f0 RBP: 00007ffde389d5f0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 0000000001bce940 R13: 0000000000000000 R14: 00000000000000f3 R15: 0000000000011112 Code: 84 cd 04 00 00 48 ba 00 00 00 00 00 fc ff df 48 8d 78 24 48 89 f9 48 c1 e9 03 0f b6 0c 11 48 89 fa 83 e2 07 83 c2 03 38 ca 7c 08 <84> c9 0f 85 da 05 00 00 8b 48 24 85 c9 0f 85 b1 04 00 00 48 ba