watchdog: BUG: soft lockup - CPU#1 stuck for 135s! [syz-executor0:4530] Modules linked in: irq event stamp: 78387056 hardirqs last enabled at (78387055): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (78387055): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (78387055): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (78387055): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (78387055): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (78387056): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (538858): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (538587): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (538587): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 1 PID: 4530 Comm: syz-executor0 Not tainted 4.17.0-rc6+ #34 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:seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] RIP: 0010:read_seqcount_begin include/linux/seqlock.h:164 [inline] RIP: 0010:read_seqbegin include/linux/seqlock.h:433 [inline] RIP: 0010:read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] RIP: 0010:d_walk+0x840/0xc80 fs/dcache.c:1248 RSP: 0018:ffff8801a3c6f9f8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801a3c40280 RBX: 0000000000000293 RCX: 1ffff10034788165 RDX: 0000000000000000 RSI: ffffffff81c703ab RDI: 0000000000000293 RBP: ffff8801a3c6fb78 R08: ffff8801a3c40ab8 R09: 0000000000000006 R10: ffff8801a3c40280 R11: 0000000000000000 R12: 0000000000000200 R13: dffffc0000000000 R14: 1ffff1003478df82 R15: ffff8801a3c6fb50 FS: 000000000173a940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000930008 CR3: 00000001a4380000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 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:00007ffefe7a2fc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffefe7a4d70 RDI: 00007ffefe7a4d70 RBP: 00007ffefe7a4d70 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 000000000173b940 R13: 0000000000000000 R14: 00000000000000fc R15: 0000000000011d7f Code: 88 48 89 f8 48 c1 e8 03 42 80 3c 28 00 0f 85 1e 04 00 00 48 83 3d c8 89 0a 07 00 0f 84 29 02 00 00 e8 b5 37 b2 ff 48 89 df 57 9d <0f> 1f 44 00 00 e8 a6 37 b2 ff 49 8d 5f 80 48 c1 eb 03 4c 01 eb Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4536 Comm: syz-executor6 Not tainted 4.17.0-rc6+ #34 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:mark_lock+0x51/0x19e0 kernel/locking/lockdep.c:3114 RSP: 0018:ffff8801a030f3e0 EFLAGS: 00000082 RAX: ffffed0034061e81 RBX: 1ffff10034061e81 RCX: 0000000000000002 RDX: dffffc0000000000 RSI: ffff8801a0304cd8 RDI: ffff8801a0304400 RBP: ffff8801a030f510 R08: 0000000000000002 R09: 0000000000000004 R10: ffff8801a0304400 R11: ffff8801a0304400 R12: ffff8801a0304cd8 R13: ffff8801a0304cf8 R14: 0000000000000004 R15: 0000000000000004 FS: 0000000002330940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000002339978 CR3: 00000001a02f4000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mark_irqflags kernel/locking/lockdep.c:3039 [inline] __lock_acquire+0x756/0x5140 kernel/locking/lockdep.c:3388 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:00007fffd561f888 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007fffd5621630 RDI: 00007fffd5621630 RBP: 00007fffd5621630 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 0000000002331940 R13: 0000000000000000 R14: 0000000000000109 R15: 000000000001211e Code: 4c 8d 6e 20 41 54 49 89 f4 53 48 8d 9d f8 fe ff ff 48 c1 eb 03 48 8d 04 13 48 81 ec 08 01 00 00 48 c7 85 f8 fe ff ff b3 8a b5 41 <48> c7 85 00 ff ff ff 58 fa 9a 88 48 c7 85 08 ff ff ff 10 7b 5c