watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor3:4593] Modules linked in: irq event stamp: 9555458 hardirqs last enabled at (9555457): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (9555457): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (9555457): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (9555457): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (9555457): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (9555458): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (1287234): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (1287189): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (1287189): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4593 Comm: syz-executor3 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:ffff88019da7f8a0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff10033b4ff19 RCX: 1ffff10035f0a955 RDX: 1ffffffff11a316d RSI: 0000000000000005 RDI: 0000000000000286 RBP: ffff88019da7f9d0 R08: 1ffff10033b4ff1d R09: ffff88019da7f728 R10: 0000000000000003 R11: 0000000000000004 R12: ffff8801af854280 R13: ffff880194466cf8 R14: ffff8801af854280 R15: ffff88019da7f8e8 FS: 0000000002997940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000029a0978 CR3: 000000019da5e000 CR4: 00000000001406f0 DR0: 00000000200001c0 DR1: 00000000200001c0 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:00007ffe4e269a38 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffe4e26b7e0 RDI: 00007ffe4e26b7e0 RBP: 00007ffe4e26b7e0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 0000000002998940 R13: 0000000000000000 R14: 000000000000032c R15: 0000000000022eb8 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: 4588 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:hlock_class kernel/locking/lockdep.c:152 [inline] RIP: 0010:mark_lock+0xff/0x19e0 kernel/locking/lockdep.c:3121 RSP: 0018:ffff88019fbd7830 EFLAGS: 00000086 RAX: 000000000000036b RBX: 1ffff10033f7af0b RCX: 1ffff10033f79d23 RDX: 0000000000001117 RSI: ffff88019fbce8f8 RDI: ffff88019fbce0c0 RBP: ffff88019fbd7960 R08: 0000000000000007 R09: 0000000000000006 R10: ffff88019fbce0c0 R11: 0000000000000000 R12: ffff88019fbce8f8 R13: ffff88019fbce918 R14: ffffffff8a277360 R15: 0000000000000080 FS: 00000000023da940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000023e3978 CR3: 000000019fbbb000 CR4: 00000000001406e0 DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: mark_held_locks+0xc9/0x160 kernel/locking/lockdep.c:2807 __trace_hardirqs_on_caller kernel/locking/lockdep.c:2836 [inline] trace_hardirqs_on_caller+0x421/0x5c0 kernel/locking/lockdep.c:2883 trace_hardirqs_on+0xd/0x10 kernel/locking/lockdep.c:2890 seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] read_seqcount_begin include/linux/seqlock.h:164 [inline] read_seqbegin include/linux/seqlock.h:433 [inline] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] d_walk+0x80f/0xc80 fs/dcache.c:1248 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:00007ffe203949d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffe20396780 RDI: 00007ffe20396780 RBP: 00007ffe20396780 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 00000000023db940 R13: 0000000000000000 R14: 000000000000032f R15: 0000000000022ed4 Code: d2 74 09 80 fa 03 0f 8e 58 06 00 00 25 ff 1f 00 00 48 8d 14 80 4c 8d 34 90 49 c1 e6 04 49 81 ee 50 01 00 00 49 81 c6 40 f8 22 8a <48> b8 00 00 00 00 00 fc ff df 49 8d 7e 30 48 89 fa 48 c1 ea 03