watchdog: BUG: soft lockup - CPU#1 stuck for 134s! [syz-executor6:4592] Modules linked in: irq event stamp: 49286560 hardirqs last enabled at (49286559): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (49286559): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (49286559): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (49286559): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (49286559): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (49286560): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (818552): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (818391): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (818391): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 1 PID: 4592 Comm: syz-executor6 Not tainted 4.17.0-rc6+ #33 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:ffff88019d6678d8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff10033accf20 RCX: 0000000000000000 RDX: 1ffffffff11a31ad RSI: ffff88019d65ea78 RDI: 0000000000000286 RBP: ffff88019d6679c8 R08: 0000000000001180 R09: 0000000000000004 R10: ffff88019d65eb18 R11: ffff88019d65e240 R12: ffff88019d65e240 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 FS: 0000000000aac940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000ab5978 CR3: 000000019d639000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 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:00007ffc31615ab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffc31617860 RDI: 00007ffc31617860 RBP: 00007ffc31617860 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 0000000000aad940 R13: 0000000000000000 R14: 000000000000014f R15: 0000000000014dba 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: 4590 Comm: syz-executor5 Not tainted 4.17.0-rc6+ #33 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:mark_held_locks+0x14/0x160 kernel/locking/lockdep.c:2790 RSP: 0018:ffff88019fb4f9b0 EFLAGS: 00000802 RAX: ffff88019fb449f0 RBX: ffff88019fb441c0 RCX: 1ffff10033f6894d RDX: 1ffff10033f6893e RSI: 0000000000000001 RDI: ffff88019fb441c0 RBP: ffff88019fb4f9b8 R08: ffff88019fb449f8 R09: 0000000000000002 R10: ffff88019fb441c0 R11: 0000000000000000 R12: ffffffff81c7037f R13: dffffc0000000000 R14: 1ffff10033f69f82 R15: ffff88019fb4fb50 FS: 00000000028cb940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004ce640 CR3: 000000019fb0e000 CR4: 00000000001406f0 DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 00000000000d0602 Call Trace: __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:00007ffc3c4b1e28 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffc3c4b3bd0 RDI: 00007ffc3c4b3bd0 RBP: 00007ffc3c4b3bd0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 00000000028cc940 R13: 0000000000000000 R14: 0000000000000156 R15: 0000000000014a56 Code: ff 4c 8b 95 e0 fe ff ff e9 0a ef ff ff 66 2e 0f 1f 84 00 00 00 00 00 55 48 8d 87 30 08 00 00 48 89 c2 48 c1 ea 03 48 89 e5 41 57 <41> 56 41 55 41 54 49 89 fc 53 48 83 ec 20 48 89 45 c0 48 b8 00