watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor5:10764] Modules linked in: irq event stamp: 11080386 hardirqs last enabled at (11080385): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (11080385): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (11080385): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (11080385): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (11080385): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (11080386): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (450054): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (450027): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (450027): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 10764 Comm: syz-executor5 Not tainted 4.17.0-rc5+ #57 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:debug_spin_lock_after kernel/locking/spinlock_debug.c:92 [inline] RIP: 0010:do_raw_spin_lock+0x128/0x200 kernel/locking/spinlock_debug.c:114 RSP: 0018:ffff88019dcbf9a0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff8801da50fd20 RCX: ffffffff815e0591 RDX: 1ffff1003b4a1fa6 RSI: 0000000000000004 RDI: ffff8801da50fd20 RBP: ffff88019dcbf9c8 R08: ffffed003b4a1fa5 R09: ffffed003b4a1fa4 R10: ffffed003b4a1fa4 R11: ffff8801da50fd23 R12: ffff88019dd7e580 R13: ffff8801da50fd30 R14: 0000000000000000 R15: ffff88019dcbfb50 FS: 000000000273e940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000002747978 CR3: 000000019dd87000 CR4: 00000000001406f0 DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __raw_spin_lock include/linux/spinlock_api_smp.h:143 [inline] _raw_spin_lock+0x32/0x40 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:00007fff5fb73f88 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007fff5fb75d30 RDI: 00007fff5fb75d30 RBP: 00007fff5fb75d30 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000006 R11: 0000000000000206 R12: 000000000273f940 R13: 0000000000000000 R14: 00000000000001af R15: 000000000002c2b8 Code: 08 84 d2 0f 85 bf 00 00 00 4c 89 ea 44 89 73 08 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 65 4c 8b 24 25 c0 ed 01 00 80 3c 02 00 <0f> 85 b3 00 00 00 4c 89 63 10 48 83 c4 08 5b 41 5c 41 5d 41 5e Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4564 Comm: syz-executor0 Not tainted 4.17.0-rc5+ #57 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:778 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/paravirt.h:800 [inline] RIP: 0010:lock_acquire+0xf9/0x520 kernel/locking/lockdep.c:3915 RSP: 0018:ffff8801a33b78f0 EFLAGS: 00000086 RAX: 0000000000000086 RBX: 1ffff10034676f23 RCX: 0000000000000000 RDX: 1ffffffff11a30e4 RSI: 0000000000000000 RDI: ffffffff88d18720 RBP: ffff8801a33b79e0 R08: 0000000000000001 R09: 0000000000000000 R10: ffffed0039336118 R11: ffff8801c99b08c3 R12: 0000000000000000 R13: 0000000000000002 R14: 0000000000000001 R15: 0000000000000000 FS: 0000000000b54940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000b5d978 CR3: 00000001a3202000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: seqcount_lockdep_reader_access include/linux/seqlock.h:81 [inline] read_seqcount_begin include/linux/seqlock.h:164 [inline] read_seqbegin include/linux/seqlock.h:433 [inline] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] d_walk+0x1c0/0xc80 fs/dcache.c:1248 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:00007ffea4cbeec8 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffea4cc0c70 RDI: 00007ffea4cc0c70 RBP: 00007ffea4cc0c70 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000006 R11: 0000000000000202 R12: 0000000000b55940 R13: 0000000000000000 R14: 00000000000002e8 R15: 000000000002c2f2 Code: 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 c9 03 00 00 48 83 3d cf 79 74 07 00 0f 84 1b 03 00 00 9c 58 <0f> 1f 44 00 00 48 c7 c7 30 87 d1 88 48 89 85 20 ff ff ff 48 b8