watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor1:4506] Modules linked in: irq event stamp: 10687492 hardirqs last enabled at (10687491): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (10687491): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (10687491): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (10687491): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (10687491): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (10687492): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (10687156): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (10687149): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (10687149): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4506 Comm: syz-executor1 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:ffff8801a441f8a0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff10034883f19 RCX: 1ffff10034882d7d RDX: 1ffffffff11a316d RSI: 0000000000000005 RDI: 0000000000000286 RBP: ffff8801a441f9d0 R08: 1ffff10034883f1d R09: ffff8801a441f728 R10: 0000000000000003 R11: 0000000000000004 R12: ffff8801a44163c0 R13: ffff8801ce59da38 R14: ffff8801a44163c0 R15: ffff8801a441f8e8 FS: 00000000029df940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000029f09b8 CR3: 00000001a4bd7000 CR4: 00000000001406f0 DR0: 00000000200001c0 DR1: 00000000200001c0 DR2: 0000000020000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 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:00007fff34f47a38 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007fff34f497e0 RDI: 00007fff34f497e0 RBP: 00007fff34f497e0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 00000000029e0940 R13: 0000000000000000 R14: 0000000000000457 R15: 00000000000345c1 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: 4512 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:perf_trace_lock+0xa/0x900 include/trace/events/lock.h:39 RSP: 0018:ffff8801a0157898 EFLAGS: 00000082 RAX: ffffffff815beb00 RBX: 1ffff1003402af19 RCX: ffffed003402af62 RDX: dffffc0000000000 RSI: ffff8801ce6d64b8 RDI: ffffffff88d77060 RBP: ffff8801a01579d0 R08: 0000000000000000 R09: ffffed0039cdac94 R10: ffffed0039cdac94 R11: ffff8801ce6d64a3 R12: ffff8801a01579a8 R13: ffff8801ce6d64b8 R14: dffffc0000000000 R15: ffff8801d72e61a8 FS: 00000000024f9940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000093002d CR3: 00000001a0138000 CR4: 00000000001406e0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 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:00007ffe080b88b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffe080ba660 RDI: 00007ffe080ba660 RBP: 00007ffe080ba660 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 00000000024fa940 R13: 0000000000000000 R14: 0000000000000473 R15: 00000000000345a3 Code: ff 4c 89 e7 e8 58 f9 59 00 48 8b 95 70 fe ff ff 4c 8d 45 d8 e9 ff fb ff ff 0f 1f 84 00 00 00 00 00 48 ba 00 00 00 00 00 fc ff df <55> 49 89 f0 48 89 e5 41 57 49 89 ff 41 56 41 55 41 54 4c 8d 65