watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor1:4603] Modules linked in: irq event stamp: 10072366 hardirqs last enabled at (10072365): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (10072365): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (10072365): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (10072365): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (10072365): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (10072366): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (225188): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (224331): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (224331): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4603 Comm: syz-executor1 Not tainted 4.17.0-rc4+ #14 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:ffff88019edcf8a0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff10033db9f19 RCX: 1ffff10033db8d7d RDX: 1ffffffff11a316d RSI: 0000000000000004 RDI: 0000000000000286 RBP: ffff88019edcf9d0 R08: 1ffff10033db9f1d R09: ffff88019edcf728 R10: 0000000000000003 R11: 0000000000000003 R12: ffff88019edc63c0 R13: ffff8801da452ab8 R14: ffff88019edc63c0 R15: ffff88019edcf8e8 FS: 0000000001c63940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff499a5090 CR3: 000000019ec9b000 CR4: 00000000001406f0 DR0: ffffffffffffff00 DR1: 0000000000000000 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+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:00007fff499a4ff8 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007fff499a6da0 RDI: 00007fff499a6da0 RBP: 00007fff499a6da0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 0000000001c64940 R13: 0000000000000000 R14: 00000000000000fa R15: 000000000001247e 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: 4597 Comm: syz-executor6 Not tainted 4.17.0-rc4+ #14 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:debug_lockdep_rcu_enabled.part.1+0x0/0x60 kernel/rcu/update.c:398 RSP: 0018:ffff8801a18ef888 EFLAGS: 00000002 RAX: 0000000000000001 RBX: 1ffff1003431df19 RCX: ffffed003431df62 RDX: 0000000000000004 RSI: 0000000000000001 RDI: ffffffff8909b8a0 RBP: ffff8801a18ef890 R08: 0000000000000000 R09: ffffed003936eca4 R10: ffffed003936eca4 R11: ffff8801c9b76523 R12: ffff8801a18ef9a8 R13: ffff8801c9b76538 R14: ffff8801d37a9f10 R15: 1ffff1003431df25 FS: 0000000001803940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f10ef708000 CR3: 00000001a1f96000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: trace_lock_release include/trace/events/lock.h:58 [inline] lock_release+0x578/0xa10 kernel/locking/lockdep.c:3938 __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:00007fff4a1b8578 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007fff4a1ba320 RDI: 00007fff4a1ba320 RBP: 00007fff4a1ba320 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 0000000001804940 R13: 0000000000000000 R14: 00000000000000fe R15: 0000000000012489 Code: 45 a0 e8 94 3e 52 00 48 8b 45 a0 e9 c3 fd ff ff 48 8b 7d c8 e8 82 3e 52 00 e9 9c fd ff ff 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 <48> b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 65 48 8b 1c 25 c0