watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor3:4590] Modules linked in: irq event stamp: 12114738 hardirqs last enabled at (12114737): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (12114737): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (12114737): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (12114737): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (12114737): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (12114738): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (6648030): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (6647899): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (6647899): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4590 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:d_walk+0x6/0xc80 fs/dcache.c:1240 RSP: 0018:ffff8801a5af7b70 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: ffffffff81c5f080 RSI: ffff8801a5af7c10 RDI: ffff8801c98a6dc0 RBP: ffff8801a5af7b78 R08: ffff8801b12c0740 R09: ffffed0039314dc8 R10: ffffed0039314dc8 R11: ffff8801c98a6e43 R12: ffff8801a5af7c50 R13: ffff8801a5af7c10 R14: 1ffff10034b5ef82 R15: ffffed0034b5ef85 FS: 0000000001d5a940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd35c25f88 CR3: 00000001a5a03000 CR4: 00000000001406f0 DR0: 00000000200001c0 DR1: 00000000200001c0 DR2: 00000000200001c0 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:00007ffd35c261e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffd35c27f90 RDI: 00007ffd35c27f90 RBP: 00007ffd35c27f90 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 0000000001d5b940 R13: 0000000000000000 R14: 0000000000000656 R15: 0000000000042829 Code: 30 ff ff ff e8 3c 53 ef ff e9 90 fd ff ff 48 8b bd 30 ff ff ff e8 2b 53 ef ff e9 63 fd ff ff 66 0f 1f 44 00 00 55 48 89 e5 41 57 <41> 56 48 8d 85 f8 fe ff ff 4c 8d 7d d8 41 55 48 c1 e8 03 41 54 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4592 Comm: syz-executor2 Not tainted 4.17.0-rc4+ #14 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:mark_irqflags kernel/locking/lockdep.c:3010 [inline] RIP: 0010:__lock_acquire+0x5a7/0x5140 kernel/locking/lockdep.c:3388 RSP: 0018:ffff8801a080f520 EFLAGS: 00000802 RAX: 0000000000000000 RBX: 00000000000000fe RCX: 0000000000000000 RDX: 1ffff10034100def RSI: 1ffff10034100dea RDI: ffff8801a0806f79 RBP: ffff8801a080f8a8 R08: 0000000000000001 R09: 0000000000000004 R10: ffff8801a0806f58 R11: ffff8801a0806680 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000004 R15: ffff8801a0806ea4 FS: 000000000170b940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001714978 CR3: 00000001a0801000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920 _raw_spin_lock_nested+0x28/0x40 kernel/locking/spinlock.c:354 d_walk+0x3ad/0xc80 fs/dcache.c:1274 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:00007fff4a42e988 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007fff4a430730 RDI: 00007fff4a430730 RBP: 00007fff4a430730 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 000000000170c940 R13: 0000000000000000 R14: 00000000000005cb R15: 00000000000427eb Code: 00 00 8b 45 28 41 89 42 24 45 85 c0 0f 84 48 02 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7a 21 48 89 fa 48 c1 ea 03 0f b6 04 02 <48> 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 18 0e 00 00 4d 8d 62