watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor7:4589] Modules linked in: irq event stamp: 12906968 hardirqs last enabled at (12906967): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (12906967): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (12906967): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (12906967): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (12906967): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (12906968): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (3577490): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (3576859): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (3576859): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4589 Comm: syz-executor7 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:seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] RIP: 0010:read_seqcount_begin include/linux/seqlock.h:164 [inline] RIP: 0010:read_seqbegin include/linux/seqlock.h:433 [inline] RIP: 0010:read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] RIP: 0010:d_walk+0x840/0xc80 fs/dcache.c:1248 RSP: 0018:ffff8801ad5a79f8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801d8480140 RBX: 0000000000000293 RCX: 1ffff1003b09013d RDX: 0000000000000000 RSI: ffffffff81c6995b RDI: 0000000000000293 RBP: ffff8801ad5a7b78 R08: ffff8801d8480978 R09: 0000000000000006 R10: ffff8801d8480140 R11: 0000000000000000 R12: 0000000000000200 R13: dffffc0000000000 R14: 1ffff10035ab4f82 R15: ffff8801ad5a7b50 FS: 000000000156c940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001575978 CR3: 000000019ff1a000 CR4: 00000000001406f0 DR0: 0000000020000000 DR1: 00000000200001c0 DR2: 00000000200001c0 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: 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:00007ffe854ced98 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffe854d0b40 RDI: 00007ffe854d0b40 RBP: 00007ffe854d0b40 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 000000000156d940 R13: 0000000000000000 R14: 00000000000007c3 R15: 0000000000050002 Code: 88 48 89 f8 48 c1 e8 03 42 80 3c 28 00 0f 85 1e 04 00 00 48 83 3d 18 f2 0a 07 00 0f 84 29 02 00 00 e8 35 94 b2 ff 48 89 df 57 9d <0f> 1f 44 00 00 e8 26 94 b2 ff 49 8d 5f 80 48 c1 eb 03 4c 01 eb Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4590 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:__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+0xc0/0x2e0 kernel/locking/spinlock_debug.c:134 RSP: 0018:ffff88019f1ef948 EFLAGS: 00000206 RAX: 0000000000000003 RBX: ffff8801ce6fc7e0 RCX: ffffffff815e08fe RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8801ce6fc7e0 RBP: ffff88019f1ef9d0 R08: ffffed0039cdf8fd R09: ffffed0039cdf8fc R10: ffffed0039cdf8fc R11: ffff8801ce6fc7e3 R12: 1ffff10033e3df29 R13: dffffc0000000000 R14: ffff88019f1ef9a8 R15: ffff88019f1efb50 FS: 0000000002151940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fae0432a330 CR3: 000000019f7ae000 CR4: 00000000001406e0 DR0: 0000000020000080 DR1: 0000000020000080 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+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:00007fffd27cbc88 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007fffd27cda30 RDI: 00007fffd27cda30 RBP: 00007fffd27cda30 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 0000000002152940 R13: 0000000000000000 R14: 00000000000007a1 R15: 000000000005003c Code: 00 48 89 df e8 52 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 4d 8d 6e c0 44 8b 3b 48 b8 00 00 00 00