watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor7:4564] Modules linked in: irq event stamp: 19947772 hardirqs last enabled at (19947771): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (19947771): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (19947771): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (19947771): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (19947771): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (19947772): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (11817104): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (11816957): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (11816957): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4564 Comm: syz-executor7 Not tainted 4.17.0-rc5+ #57 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:ffff88018b39f8a0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff10031673f19 RCX: 1ffff10031672565 RDX: 1ffffffff11a30e5 RSI: 0000000000000005 RDI: 0000000000000286 RBP: ffff88018b39f9d0 R08: 1ffff10031673f1d R09: ffff88018b39f728 R10: 0000000000000003 R11: 0000000000000004 R12: ffff88018b392300 R13: ffff88017f75bb98 R14: ffff88018b392300 R15: ffff88018b39f8e8 FS: 0000000001c4b940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001c54978 CR3: 000000018b291000 CR4: 00000000001406f0 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+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:00007ffdb56c5ee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffdb56c7c90 RDI: 00007ffdb56c7c90 RBP: 00007ffdb56c7c90 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000006 R11: 0000000000000206 R12: 0000000001c4c940 R13: 0000000000000000 R14: 0000000000001570 R15: 00000000000c250b 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 80 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: 4566 Comm: syz-executor3 Not tainted 4.17.0-rc5+ #57 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:trace_event_get_offsets_lock_acquire include/trace/events/lock.h:13 [inline] RIP: 0010:perf_trace_lock+0x10a/0x900 include/trace/events/lock.h:39 RSP: 0018:ffff8801899bf6e0 EFLAGS: 00000002 RAX: 00000000000e0018 RBX: 1ffff10031337ee4 RCX: 0000000000000005 RDX: 000000000000000d RSI: 0000000000000004 RDI: 1ffff10031337ee8 RBP: ffff8801899bf8a8 R08: ffffffff88d8df60 R09: ffff8801899bf740 R10: ffffed003b5e46c2 R11: ffff8801daf23613 R12: ffff8801899bf880 R13: ffffffff88d8df60 R14: dffffc0000000000 R15: ffffffff88d76ca0 FS: 0000000001deb940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001df4978 CR3: 000000018998a000 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+0x5e6/0xa10 kernel/locking/lockdep.c:3938 rcu_lock_release include/linux/rcupdate.h:251 [inline] rcu_read_unlock include/linux/rcupdate.h:688 [inline] d_walk+0x716/0xc80 fs/dcache.c:1327 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:00007ffcdad5a8b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffcdad5c660 RDI: 00007ffcdad5c660 RBP: 00007ffcdad5c660 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000006 R11: 0000000000000206 R12: 0000000001dec940 R13: 0000000000000000 R14: 00000000000014d7 R15: 00000000000c24cf Code: 83 c0 01 c1 e0 10 83 c8 18 4d 8d 8c 24 c0 fe ff ff 48 be 00 00 00 00 00 fc ff df 4c 89 cf 48 c1 ef 03 0f b6 34 37 40 84 f6 74 0a <40> 80 fe 03 0f 8e d3 03 00 00 49 8d 7f 78 41 89 84 24 c0 fe ff