watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor7:4563] Modules linked in: irq event stamp: 18657822 hardirqs last enabled at (18657821): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (18657821): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (18657821): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (18657821): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (18657821): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (18657822): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (8710796): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (8710729): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (8710729): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4563 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:lock_release+0x4d4/0xa10 kernel/locking/lockdep.c:3942 RSP: 0018:ffff88019f81f8a0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff10033f03f19 RCX: 1ffff10033f02155 RDX: 1ffffffff11a316d RSI: 0000000000000005 RDI: 0000000000000286 RBP: ffff88019f81f9d0 R08: 1ffff10033f03f1d R09: ffffed0039c674d0 R10: 0000000000000003 R11: 0000000000000004 R12: ffff88019f810280 R13: ffff8801ce33a698 R14: ffff88019f810280 R15: ffff88019f81f8e8 FS: 0000000001245940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000124e978 CR3: 000000019ff68000 CR4: 00000000001406f0 DR0: 00000000200001c0 DR1: 00000000200001c0 DR2: 00000000200001c0 DR3: 00000000200001c0 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:00007ffd7a6529e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffd7a654790 RDI: 00007ffd7a654790 RBP: 00007ffd7a654790 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 0000000001246940 R13: 0000000000000000 R14: 00000000000009a3 R15: 0000000000071aed 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: 4562 Comm: syz-executor4 Not tainted 4.17.0-rc4+ #14 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kasan_check_write+0xb/0x20 mm/kasan/kasan.c:277 RSP: 0018:ffff8801a074f510 EFLAGS: 00000082 RAX: dffffc0000000000 RBX: ffffffff8a237e20 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8a237f58 RBP: ffff8801a074f510 R08: 0000000000000001 R09: 0000000000000000 R10: ffff8801a0746240 R11: ffff8801a0746240 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801b2ada4f8 FS: 0000000001d60940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fffdeeeadac CR3: 00000001a061e000 CR4: 00000000001406e0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: atomic_inc include/asm-generic/atomic-instrumented.h:102 [inline] __lock_acquire+0x291/0x5140 kernel/locking/lockdep.c:3323 lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920 __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:00007fffdeeeb4b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007fffdeeed260 RDI: 00007fffdeeed260 RBP: 00007fffdeeed260 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 0000000001d61940 R13: 0000000000000000 R14: 00000000000009b7 R15: 0000000000071af2 Code: 55 89 f6 31 d2 48 89 e5 48 8b 4d 08 e8 3f fe ff ff 5d c3 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 55 89 f6 ba 01 00 00 00 48 89 e5 <48> 8b 4d 08 e8 1c fe ff ff 5d c3 66 2e 0f 1f 84 00 00 00 00 00