watchdog: BUG: soft lockup - CPU#1 stuck for 134s! [syz-executor2:4562] Modules linked in: irq event stamp: 49287568 hardirqs last enabled at (49287567): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (49287567): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (49287567): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (49287567): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (49287567): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (49287568): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (515514): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (515447): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (515447): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 1 PID: 4562 Comm: syz-executor2 Not tainted 4.17.0-rc7+ #38 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:ffff88019b81f8a0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff10033703f19 RCX: 1ffff1003b160905 RDX: 1ffffffff11a31ad RSI: 0000000000000004 RDI: 0000000000000286 RBP: ffff88019b81f9d0 R08: 1ffff10033703f1d R09: ffffed003b5e46d2 R10: 0000000000000003 R11: 0000000000000003 R12: ffff8801d8b04000 R13: ffff8801cde82ed8 R14: ffff8801d8b04000 R15: ffff88019b81f8e8 FS: 000000000135e940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000727320 CR3: 00000001d8c8e000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 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+0x75f/0xc80 fs/dcache.c:1332 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: 0033:0x455767 RSP: 002b:00007ffdc0be8b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455767 RDX: 0000000000000000 RSI: 00007ffdc0bea8f0 RDI: 00007ffdc0bea8f0 RBP: 00007ffdc0bea8f0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 000000000135f940 R13: 0000000000000000 R14: 000000000000014f R15: 000000000001510c Code: 00 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 a3 03 00 00 48 83 3d 13 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: 4560 Comm: syz-executor7 Not tainted 4.17.0-rc7+ #38 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:ffff88019c4ef520 EFLAGS: 00000006 RAX: fffffbfff146c002 RBX: ffffffff8a35fed0 RCX: ffffffff815ca121 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8a360008 RBP: ffff88019c4ef8a8 R08: fffffbfff146c002 R09: fffffbfff146c001 R10: fffffbfff146c001 R11: ffffffff8a36000b R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801cdeb2118 FS: 000000000175d940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001766978 CR3: 000000019c92c000 CR4: 00000000001406f0 DR0: 00000000200001c0 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 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: 0033:0x455767 RSP: 002b:00007ffe270f2038 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455767 RDX: 0000000000000000 RSI: 00007ffe270f3de0 RDI: 00007ffe270f3de0 RBP: 00007ffe270f3de0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 000000000175e940 R13: 0000000000000000 R14: 0000000000000143 R15: 00000000000155ae 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 9f ab 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