watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor629:4520] Modules linked in: irq event stamp: 13421524 hardirqs last enabled at (13421523): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (13421523): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (13421523): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (13421523): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (13421523): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (13421524): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (3821254): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (3820877): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (3820877): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4520 Comm: syz-executor629 Not tainted 4.17.0-rc4+ #14 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:do_raw_spin_unlock+0x64/0x2e0 kernel/locking/spinlock_debug.c:133 RSP: 0018:ffff8801ad8c7948 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: ffffed0035b18f29 RBX: ffff8801a426ba60 RCX: 1ffff10035b4f19d RDX: dffffc0000000000 RSI: 0000000000000005 RDI: ffff8801a426ba64 RBP: ffff8801ad8c79d0 R08: 1ffff10035b18f1d R09: ffff8801ad8c7728 R10: 0000000000000003 R11: 0000000000000004 R12: 1ffff10035b18f29 R13: dffffc0000000000 R14: ffff8801ad8c79a8 R15: ffff8801ad8c7b50 FS: 0000000001806940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffddbdefe4c CR3: 00000001d01e9000 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: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: 0033:0x449507 RSP: 002b:00007ffddbdf0558 EFLAGS: 00000207 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000449507 RDX: 0000000000000000 RSI: 00000000006e5678 RDI: 00007ffddbdf1d80 RBP: 00007ffddbdf1d80 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000207 R12: 0000000001807960 R13: 0000000000000000 R14: 000000000002fa9d R15: 00007ffddbdf1778 Code: 1c 98 9a 88 48 c7 85 78 ff ff ff b3 8a b5 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 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4518 Comm: syz-executor629 Not tainted 4.17.0-rc4+ #14 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:hlock_class kernel/locking/lockdep.c:152 [inline] RIP: 0010:mark_lock+0xd3/0x19e0 kernel/locking/lockdep.c:3121 RSP: 0018:ffff8801adb67830 EFLAGS: 00000802 RAX: 0000000000000345 RBX: 1ffff10035b6cf0b RCX: 1ffff10035c0719d RDX: 0000000000000000 RSI: ffff8801ae038cc8 RDI: ffff8801ae038440 RBP: ffff8801adb67960 R08: 0000000000000002 R09: 0000000000000002 R10: ffff8801ae038440 R11: 0000000000000000 R12: ffff8801ae038cc8 R13: ffff8801ae038ce8 R14: 0000000000000003 R15: 0000000000000004 FS: 0000000001806940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffddbdefe4c CR3: 00000001ae77b000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 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: 0033:0x449507 RSP: 002b:00007ffddbdf0558 EFLAGS: 00000207 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000449507 RDX: 0000000000000000 RSI: 00000000006e5678 RDI: 00007ffddbdf1d80 RBP: 00007ffddbdf1d80 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000207 R12: 0000000001807960 R13: 0000000000000000 R14: 000000000002fa98 R15: 00007ffddbdf1778 Code: 0f 8e 61 06 00 00 41 0f b7 44 24 20 66 a9 ff 1f 0f 84 b0 00 00 00 48 ba 00 00 00 00 00 fc ff df 4c 89 e9 48 c1 e9 03 0f b6 14 11 <84> d2 74 09 80 fa 03 0f 8e 58 06 00 00 25 ff 1f 00 00 48 8d 14