watchdog: BUG: soft lockup - CPU#1 stuck for 134s! [syz-executor7:4556] Modules linked in: irq event stamp: 91468754 hardirqs last enabled at (91468753): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (91468753): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (91468753): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (91468753): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (91468753): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (91468754): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (18250494): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (18249961): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (18249961): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 1 PID: 4556 Comm: syz-executor7 Not tainted 4.17.0-rc6+ #31 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_acquire+0x257/0x520 kernel/locking/lockdep.c:3923 RSP: 0018:ffff88019f88f8d8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff10033f11f20 RCX: 0000000000000000 RDX: 1ffffffff11a31ad RSI: ffff88019f8828f8 RDI: 0000000000000286 RBP: ffff88019f88f9c8 R08: 0000000000007ac5 R09: 0000000000000004 R10: ffff88019f882998 R11: ffff88019f8820c0 R12: ffff88019f8820c0 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 FS: 0000000000c89940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f92fec0c010 CR3: 000000019fe7d000 CR4: 00000000001406e0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: _raw_spin_lock_nested+0x28/0x40 kernel/locking/spinlock.c:354 d_walk+0x3ad/0xc80 fs/dcache.c:1274 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:00007ffca3654298 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffca3656040 RDI: 00007ffca3656040 RBP: 00007ffca3656040 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 0000000000c8a940 R13: 0000000000000000 R14: 00000000000019af R15: 000000000011e683 Code: 00 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 5e 02 00 00 48 83 3d 80 74 74 07 00 0f 84 c8 01 00 00 48 8b bd 20 ff 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4560 Comm: syz-executor4 Not tainted 4.17.0-rc6+ #31 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:match_held_lock+0x2e3/0x8b0 kernel/locking/lockdep.c:3491 RSP: 0018:ffff88019d04f758 EFLAGS: 00000086 RAX: 0000000000000001 RBX: 1ffff10033a09f19 RCX: ffff88019d04f8e8 RDX: ffffed0033a09ef0 RSI: ffff8801944bed78 RDI: ffff88019d044a68 RBP: ffff88019d04f848 R08: 0000000000000000 R09: ffffed0032897dac R10: ffffffff8a716a60 R11: 0000000000000005 R12: 1ffff10033a09ef0 R13: ffff88019d044a58 R14: ffff88019d04f820 R15: 0000000000000004 FS: 00000000026d1940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffee5b68fe8 CR3: 000000019d027000 CR4: 00000000001406f0 DR0: 00000000200001c0 DR1: 00000000200001c0 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: find_held_lock+0x36/0x1c0 kernel/locking/lockdep.c:3536 __lock_release kernel/locking/lockdep.c:3689 [inline] lock_release+0x28b/0xa10 kernel/locking/lockdep.c:3939 __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:00007ffee5b697a8 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffee5b6b550 RDI: 00007ffee5b6b550 RBP: 00007ffee5b6b550 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 00000000026d2940 R13: 0000000000000000 R14: 000000000000195d R15: 000000000011e5f2 Code: 89 fb 48 b9 00 00 00 00 00 fc ff df c6 04 08 f8 4d 85 ff 75 3e 31 c0 48 ba 00 00 00 00 00 fc ff df 4c 01 e2 48 c7 02 00 00 00 00 <48> c7 42 08 00 00 00 00 c7 42 10 00 00 00 00 48 81 c4 c8 00 00