watchdog: BUG: soft lockup - CPU#0 stuck for 134s! [syz-executor2:4593] Modules linked in: irq event stamp: 54416400 hardirqs last enabled at (54416399): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (54416399): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (54416399): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (54416399): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (54416399): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (54416400): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (844824): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (844499): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (844499): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4593 Comm: syz-executor2 Not tainted 4.17.0-rc4+ #18 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:ffff88019df2f8a0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff10033be5f19 RCX: 1ffff10033be45b5 RDX: 1ffffffff11a316d RSI: 0000000000000005 RDI: 0000000000000286 RBP: ffff88019df2f9d0 R08: 1ffff10033be5f1d R09: ffff88019df2f728 R10: 0000000000000003 R11: 0000000000000004 R12: ffff88019df22580 R13: ffff8801ce18a698 R14: ffff88019df22580 R15: ffff88019df2f8e8 FS: 00000000019e6940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fffb098ac4c CR3: 000000019deeb000 CR4: 00000000001406f0 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:00007fffb098b358 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007fffb098d100 RDI: 00007fffb098d100 RBP: 00007fffb098d100 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 00000000019e7940 R13: 0000000000000000 R14: 00000000000001b5 R15: 00000000000173b0 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: 4590 Comm: syz-executor0 Not tainted 4.17.0-rc4+ #18 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:arch_atomic_inc arch/x86/include/asm/atomic.h:96 [inline] RIP: 0010:atomic_inc include/asm-generic/atomic-instrumented.h:103 [inline] RIP: 0010:__lock_acquire+0x298/0x5140 kernel/locking/lockdep.c:3323 RSP: 0018:ffff8801a2aef520 EFLAGS: 00000006 RAX: fffffbfff1448bd0 RBX: ffffffff8a245d40 RCX: ffffffff815c9ec1 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8a245e78 RBP: ffff8801a2aef8a8 R08: fffffbfff1448bd0 R09: fffffbfff1448bcf R10: fffffbfff1448bcf R11: ffffffff8a245e7b R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801b21e48d8 FS: 000000000117e940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001187978 CR3: 00000001a2998000 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:00007fffc86baa88 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007fffc86bc830 RDI: 00007fffc86bc830 RBP: 00007fffc86bc830 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 000000000117f940 R13: 0000000000000000 R14: 00000000000001b1 R15: 00000000000173ae Code: ff ff ff 48 8d bb 38 01 00 00 be 04 00 00 00 4c 89 9c 24 88 00 00 00 44 89 84 24 90 00 00 00 e8 ef 35 59 00 f0 ff 83 38 01 00 00 <4c> 8b 9c 24 88 00 00 00 44 8b 84 24 90 00 00 00 49 8d 83 30 08