watchdog: BUG: soft lockup - CPU#1 stuck for 134s! [syz-executor1:4574] Modules linked in: irq event stamp: 79441888 hardirqs last enabled at (79441887): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (79441887): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (79441887): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (79441887): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (79441887): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (79441888): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (7021730): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (7021665): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (7021665): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 1 PID: 4574 Comm: syz-executor1 Not tainted 4.17.0-rc4+ #22 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:ffff8801a321f8d8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff10034643f20 RCX: 0000000000000000 RDX: 1ffffffff11a316d RSI: ffff8801a3212ab8 RDI: 0000000000000286 RBP: ffff8801a321f9c8 R08: 00000000000055a3 R09: 0000000000000003 R10: ffff8801a3212b30 R11: ffff8801a3212280 R12: ffff8801a3212280 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 FS: 0000000002315940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000231e978 CR3: 00000001a304c000 CR4: 00000000001406e0 DR0: 0000000020000080 DR1: 0000000020000080 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:310 [inline] d_walk+0x261/0xc80 fs/dcache.c:1250 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:00007fff1521d008 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007fff1521edb0 RDI: 00007fff1521edb0 RBP: 00007fff1521edb0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 0000000002316940 R13: 0000000000000000 R14: 0000000000000d9a R15: 00000000000a7c03 Code: 00 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 5e 02 00 00 48 83 3d e0 7c 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: 4579 Comm: syz-executor5 Not tainted 4.17.0-rc4+ #22 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__preempt_count_add arch/x86/include/asm/preempt.h:76 [inline] RIP: 0010:_raw_spin_lock_nested+0x8/0x40 kernel/locking/spinlock.c:353 RSP: 0018:ffff88019ce979e8 EFLAGS: 00000203 RAX: ffff88019ce8c400 RBX: ffff8801939319b0 RCX: ffffffff81c6e24e RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff880193931940 RBP: ffff88019ce97b78 R08: ffff88019ce8c400 R09: ffffed0032726278 R10: ffffed0032726278 R11: ffff8801939313c3 R12: ffff8801939318c0 R13: dffffc0000000000 R14: ffff880193931940 R15: ffff88019ce97b50 FS: 0000000000eb7940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004ce280 CR3: 000000019ce3e000 CR4: 00000000001406f0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 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:00007ffca38224c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffca3824270 RDI: 00007ffca3824270 RBP: 00007ffca3824270 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 0000000000eb8940 R13: 0000000000000000 R14: 0000000000000dea R15: 00000000000a77d3 Code: 00 00 31 c9 31 d2 31 f6 e8 d6 eb ea f9 48 89 df e8 3e e4 eb f9 48 8b 5d f8 58 c9 c3 0f 1f 80 00 00 00 00 55 65 ff 05 c8 cc 8f 78 <48> 89 e5 53 48 89 fb ff 75 08 48 8d 7f 18 45 31 c9 41 b8 01 00