watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor1:4456] Modules linked in: irq event stamp: 13710590 hardirqs last enabled at (13710589): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (13710589): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (13710589): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (13710589): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (13710589): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (13710590): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (620162): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (620065): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (620065): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4456 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:d_walk+0xe3/0xc80 fs/dcache.c:1243 RSP: 0018:ffff8801b39cf9f8 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 RAX: ffff8801b39cfa90 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff81c691c9 RDI: ffff8801b39cfa90 RBP: ffff8801b39cfb78 R08: ffff8801b3ff2200 R09: ffffed0032f26ea4 R10: ffffed0032f26ea4 R11: ffff880197937523 R12: ffff8801b39cfc50 R13: dffffc0000000000 R14: 1ffff10036739f82 R15: ffff8801b39cfb50 FS: 000000000204d940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000002056978 CR3: 00000001a0fb2000 CR4: 00000000001406f0 DR0: 00000000200001c0 DR1: 00000000200001c0 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: 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:00007ffcb337da18 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffcb337f7c0 RDI: 00007ffcb337f7c0 RBP: 00007ffcb337f7c0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 000000000204e940 R13: 0000000000000000 R14: 0000000000000206 R15: 000000000001af39 Code: b6 04 18 84 c0 74 08 3c 03 0f 8e a6 09 00 00 49 8d 87 40 ff ff ff 49 bd 00 00 00 00 00 fc ff df 41 c7 87 40 ff ff ff 00 00 00 00 <48> 89 85 a0 fe ff ff 48 c1 e8 03 4c 01 e8 48 89 85 c8 fe ff ff Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4453 Comm: syz-executor7 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+0x47a/0xa10 kernel/locking/lockdep.c:3941 RSP: 0018:ffff8801a27ff8a0 EFLAGS: 00000807 RAX: dffffc0000000000 RBX: 1ffff100344fff19 RCX: 1ffff100344fe92d RDX: 0000000000000000 RSI: 0000000000000005 RDI: ffff8801a27f4974 RBP: ffff8801a27ff9d0 R08: 1ffff100344fff1d R09: ffffed003a9e7afc R10: 0000000000000003 R11: 0000000000000004 R12: ffff8801a27f4140 R13: ffff8801d4f3d7f8 R14: ffff8801a27f4140 R15: ffff8801a27ff8e8 FS: 0000000000cd9940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000ce2978 CR3: 00000001a27dc000 CR4: 00000000001406e0 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:00007ffd0c0d9b08 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffd0c0db8b0 RDI: 00007ffd0c0db8b0 RBP: 00007ffd0c0db8b0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 0000000000cda940 R13: 0000000000000000 R14: 00000000000001fb R15: 000000000001af3d Code: 41 c6 04 00 f8 65 4c 8b 24 25 c0 ed 01 00 49 8d bc 24 34 08 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 <48> 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 db 03 00 00