watchdog: BUG: soft lockup - CPU#0 stuck for 134s! [syz-executor1:4605] Modules linked in: irq event stamp: 78159954 hardirqs last enabled at (78159953): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (78159953): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (78159953): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (78159953): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (78159953): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (78159954): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (2602732): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (2602289): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (2602289): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4605 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_release+0x4d4/0xa10 kernel/locking/lockdep.c:3942 RSP: 0018:ffff88019f9ef8a0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff10033f3df19 RCX: 1ffff10033f39d35 RDX: 1ffffffff11a316d RSI: 0000000000000005 RDI: 0000000000000286 RBP: ffff88019f9ef9d0 R08: 1ffff10033f3df1d R09: ffffed0039308478 R10: 0000000000000003 R11: 0000000000000004 R12: ffff88019f9ce180 R13: ffff8801c98423d8 R14: ffff88019f9ce180 R15: ffff88019f9ef8e8 FS: 00000000026a8940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffec8428eac CR3: 000000019f201000 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:00007ffec84295b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffec842b360 RDI: 00007ffec842b360 RBP: 00007ffec842b360 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000006 R11: 0000000000000206 R12: 00000000026a9940 R13: 0000000000000000 R14: 000000000000051f R15: 0000000000030e0e 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: 4609 Comm: syz-executor6 Not tainted 4.17.0-rc4+ #16 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__read_once_size include/linux/compiler.h:188 [inline] RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:31 [inline] RIP: 0010:atomic_read include/asm-generic/atomic-instrumented.h:22 [inline] RIP: 0010:queued_spin_is_locked include/asm-generic/qspinlock.h:36 [inline] RIP: 0010:debug_spin_unlock kernel/locking/spinlock_debug.c:98 [inline] RIP: 0010:do_raw_spin_unlock+0xb3/0x2e0 kernel/locking/spinlock_debug.c:134 RSP: 0018:ffff88019d237948 EFLAGS: 00000a02 RAX: dffffc0000000000 RBX: ffff880194243c00 RCX: ffffffff815e08fe RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff880194243c00 RBP: ffff88019d2379d0 R08: ffffed0032848781 R09: ffffed0032848780 R10: ffffed0032848780 R11: ffff880194243c03 R12: 1ffff10033a46f29 R13: dffffc0000000000 R14: ffff88019d2379a8 R15: ffff88019d237b50 FS: 0000000000fc0940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000930008 CR3: 000000019d1d4000 CR4: 00000000001406e0 DR0: 00000000200001c0 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __raw_spin_unlock include/linux/spinlock_api_smp.h:151 [inline] _raw_spin_unlock+0x22/0x30 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: 0033:0x455777 RSP: 002b:00007fff328d7198 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007fff328d8f40 RDI: 00007fff328d8f40 RBP: 00007fff328d8f40 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000006 R11: 0000000000000202 R12: 0000000000fc1940 R13: 0000000000000000 R14: 00000000000004e0 R15: 0000000000030d8a Code: 4e ad de 0f 85 95 01 00 00 be 04 00 00 00 48 89 df e8 92 cb 57 00 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 14 02 <48> 89 d8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 a8 01 00 00