watchdog: BUG: soft lockup - CPU#1 stuck for 134s! [syz-executor1:4569] Modules linked in: irq event stamp: 81659932 hardirqs last enabled at (81659931): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (81659931): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (81659931): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (81659931): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (81659931): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (81659932): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (3209846): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (3209531): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (3209531): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 1 PID: 4569 Comm: syz-executor1 Not tainted 4.17.0-rc4+ #16 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_acquire+0x257/0x520 kernel/locking/lockdep.c:3923 RSP: 0018:ffff88019c8378f0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff10033906f23 RCX: 0000000000000000 RDX: 1ffffffff11a316d RSI: ffff88019c828f38 RDI: 0000000000000286 RBP: ffff88019c8379e0 R08: 0000000000000008 R09: 0000000000000004 R10: ffff88019c828fd8 R11: ffff88019c828700 R12: ffff88019c828700 R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000000 FS: 00000000023f1940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcbc21ce5c CR3: 000000019ce91000 CR4: 00000000001406e0 DR0: 00000000200001c0 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: rcu_lock_acquire include/linux/rcupdate.h:246 [inline] rcu_read_lock include/linux/rcupdate.h:632 [inline] d_walk+0x49b/0xc80 fs/dcache.c:1303 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:00007ffcbc21d568 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffcbc21f310 RDI: 00007ffcbc21f310 RBP: 00007ffcbc21f310 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000006 R11: 0000000000000202 R12: 00000000023f2940 R13: 0000000000000000 R14: 00000000000005b0 R15: 0000000000046d42 Code: 00 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 5e 02 00 00 48 83 3d e0 7c 74 07 00 0f 84 c8 01 00 00 48 8b bd 20 ff 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: 4565 Comm: syz-executor7 Not tainted 4.17.0-rc4+ #16 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:lock_acquire+0x0/0x520 kernel/locking/lockdep.c:3682 RSP: 0018:ffff8801d2f9f9d0 EFLAGS: 00000246 RAX: ffff8801da453380 RBX: ffff8801da453380 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8801da453398 RBP: ffff8801d2f9f9e8 R08: 0000000000000001 R09: 0000000000000000 R10: ffff8801d2fac5c0 R11: 0000000000000000 R12: 0000000000003d46 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8801d2f9fb50 FS: 0000000002691940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000728020 CR3: 00000001d01a0000 CR4: 00000000001406f0 DR0: 00000000200001c0 DR1: 00000000200001c0 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: 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:00007ffcb564d6a8 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffcb564f450 RDI: 00007ffcb564f450 RBP: 00007ffcb564f450 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000006 R11: 0000000000000202 R12: 0000000002692940 R13: 0000000000000000 R14: 0000000000000563 R15: 0000000000046cee Code: ff ff 4c 89 ff e8 01 d9 58 00 e9 67 fb ff ff e8 37 d8 58 00 e9 82 fc ff ff e8 2d d8 58 00 e9 41 fd ff ff 0f 1f 84 00 00 00 00 00 <55> 48 89 e5 41 57 4d 89 cf 41 56 45 89 c6 41 55 41 89 cd 48 b9