watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor0:4545] Modules linked in: irq event stamp: 16562664 hardirqs last enabled at (16562663): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (16562663): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (16562663): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (16562663): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (16562663): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (16562664): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (10585806): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (10585245): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (10585245): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4545 Comm: syz-executor0 Not tainted 4.17.0-rc4+ #14 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:debug_spin_unlock kernel/locking/spinlock_debug.c:97 [inline] RIP: 0010:do_raw_spin_unlock+0x72/0x2e0 kernel/locking/spinlock_debug.c:134 RSP: 0018:ffff88019e59f948 EFLAGS: 00000a03 ORIG_RAX: ffffffffffffff13 RAX: ffff880194e3a104 RBX: ffff880194e3a100 RCX: 1ffff10033cb294d RDX: 0000000000000000 RSI: 0000000000000005 RDI: ffff880194e3a104 RBP: ffff88019e59f9d0 R08: 1ffff10033cb3f1d R09: ffffed00329c7420 R10: 0000000000000003 R11: 0000000000000004 R12: 1ffff10033cb3f29 R13: dffffc0000000000 R14: ffff88019e59f9a8 R15: ffff88019e59fb50 FS: 00000000013ec940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2f123000 CR3: 000000019e49a000 CR4: 00000000001406f0 DR0: 00000000200001c0 DR1: 00000000200001c0 DR2: 00000000200001c0 DR3: 00000000200001c0 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __raw_spin_unlock include/linux/spinlock_api_smp.h:151 [inline] _raw_spin_unlock+0x22/0x30 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:00007ffcdc25a188 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffcdc25bf30 RDI: 00007ffcdc25bf30 RBP: 00007ffcdc25bf30 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 00000000013ed940 R13: 0000000000000000 R14: 0000000000000f0d R15: 000000000009f325 Code: 41 48 c7 45 88 60 08 5e 81 c7 00 f1 f1 f1 f1 c7 40 04 04 f2 f2 f2 c7 40 08 f3 f3 f3 f3 48 89 f8 48 c1 e8 03 0f b6 14 10 48 89 f8 <83> e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 f9 01 00 00 81 7b 04 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4548 Comm: syz-executor6 Not tainted 4.17.0-rc4+ #14 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:mark_lock+0x82/0x19e0 kernel/locking/lockdep.c:3114 RSP: 0018:ffff88019d87f830 EFLAGS: 00000086 RAX: ffffed0033b0ff0b RBX: 1ffff10033b0ff0b RCX: 0000000000000003 RDX: dffffc0000000000 RSI: ffff8801d8bfcb38 RDI: ffff8801d8bfc300 RBP: ffff88019d87f960 R08: 0000000000000003 R09: 0000000000000002 R10: ffff8801d8bfc300 R11: 0000000000000000 R12: ffff8801d8bfcb38 R13: ffff8801d8bfcb58 R14: 0000000000000003 R15: 0000000000000008 FS: 0000000001ed8940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc465ad8f9 CR3: 000000019dfd2000 CR4: 00000000001406e0 DR0: 0000000020000080 DR1: 0000000020000080 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: mark_held_locks+0xc9/0x160 kernel/locking/lockdep.c:2807 __trace_hardirqs_on_caller kernel/locking/lockdep.c:2828 [inline] trace_hardirqs_on_caller+0x19e/0x5c0 kernel/locking/lockdep.c:2883 trace_hardirqs_on+0xd/0x10 kernel/locking/lockdep.c:2890 seqcount_lockdep_reader_access include/linux/seqlock.h:83 [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+0x80f/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:00007ffd5eee0ca8 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffd5eee2a50 RDI: 00007ffd5eee2a50 RBP: 00007ffd5eee2a50 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 0000000001ed9940 R13: 0000000000000000 R14: 0000000000000e5b R15: 000000000009f384 Code: ff 08 b6 9a 88 48 c7 85 08 ff ff ff b0 70 5c 81 c7 00 f1 f1 f1 f1 c7 40 04 04 f2 f2 f2 c7 40 08 f2 f2 f2 f2 c7 40 0c 04 f2 f2 f2 40 10 f2 f2 f2 f2 c7 40 14 04 f2 f2 f2 c7 40 18 f3 f3 f3 f3