watchdog: BUG: soft lockup - CPU#1 stuck for 134s! [syz-executor2:4542] Modules linked in: irq event stamp: 74743978 hardirqs last enabled at (74743977): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (74743977): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (74743977): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (74743977): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (74743977): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (74743978): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (14176864): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (14176731): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (14176731): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 1 PID: 4542 Comm: syz-executor2 Not tainted 4.17.0-rc4+ #21 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:ffff8801a0b978b8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff10034172f1c RCX: 1ffff100341711c5 RDX: 1ffffffff11a316d RSI: 0000000000000005 RDI: 0000000000000286 RBP: ffff8801a0b979e8 R08: 1ffff10034172f20 R09: ffffed003b5e46c2 R10: 0000000000000003 R11: 0000000000000004 R12: ffff8801a0b88600 R13: ffffffff88d8e320 R14: ffff8801a0b88600 R15: ffff8801a0b97900 FS: 00000000013bf940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe5e7eceac CR3: 00000001a0ab6000 CR4: 00000000001406e0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: rcu_lock_release include/linux/rcupdate.h:251 [inline] rcu_read_unlock include/linux/rcupdate.h:688 [inline] d_walk+0x716/0xc80 fs/dcache.c:1327 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:00007ffe5e7ed5b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffe5e7ef360 RDI: 00007ffe5e7ef360 RBP: 00007ffe5e7ef360 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000006 R11: 0000000000000206 R12: 00000000013c0940 R13: 0000000000000000 R14: 000000000000037d R15: 000000000003e4bb 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4544 Comm: syz-executor6 Not tainted 4.17.0-rc4+ #21 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:arch_local_save_flags arch/x86/include/asm/paravirt.h:778 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/paravirt.h:800 [inline] RIP: 0010:lock_acquire+0xf7/0x520 kernel/locking/lockdep.c:3915 RSP: 0018:ffff88019f1f78d8 EFLAGS: 00000286 RAX: dffffc0000000000 RBX: 1ffff10033e3ef20 RCX: 0000000000000000 RDX: 1ffffffff11a316c RSI: 0000000000000000 RDI: ffffffff88d18b60 RBP: ffff88019f1f79c8 R08: 0000000000000001 R09: 0000000000000000 R10: ffff88019f1ec680 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 FS: 0000000001923940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcbe1dff1c CR3: 000000019f1c9000 CR4: 00000000001406f0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:310 [inline] d_walk+0x261/0xc80 fs/dcache.c:1250 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:00007ffcbe1e0628 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffcbe1e23d0 RDI: 00007ffcbe1e23d0 RBP: 00007ffcbe1e23d0 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000006 R11: 0000000000000206 R12: 0000000001924940 R13: 0000000000000000 R14: 00000000000003af R15: 000000000003e4f0 Code: d1 88 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 c9 03 00 00 48 83 3d 2f 7e 74 07 00 0f 84 1b 03 00 00 <9c> 58 0f 1f 44 00 00 48 c7 c7 70 8b d1 88 48 89 85 20 ff ff ff