watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor0:4537] Modules linked in: irq event stamp: 10755822 hardirqs last enabled at (10755821): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (10755821): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (10755821): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (10755821): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (10755821): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (10755822): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (349636): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (349555): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (349555): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4537 Comm: syz-executor0 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_acquire+0x257/0x520 kernel/locking/lockdep.c:3923 RSP: 0018:ffff8801adb1f8d8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff10035b63f20 RCX: 0000000000000000 RDX: 1ffffffff11a316d RSI: ffff8801ad65aa78 RDI: 0000000000000286 RBP: ffff8801adb1f9c8 R08: 0000000000001698 R09: 0000000000000004 R10: ffff8801ad65ab18 R11: ffff8801ad65a240 R12: ffff8801ad65a240 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 FS: 00000000010bc940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc28d5cc8c CR3: 00000001bf706000 CR4: 00000000001406f0 DR0: 00000000200001c0 DR1: 00000000200001c0 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:00007ffc28d5d398 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffc28d5f140 RDI: 00007ffc28d5f140 RBP: 00007ffc28d5f140 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 00000000010bd940 R13: 0000000000000000 R14: 0000000000000152 R15: 0000000000014ec5 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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4545 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:debug_lockdep_rcu_enabled+0x1d/0x90 kernel/rcu/update.c:300 RSP: 0018:ffff88019c8478c8 EFLAGS: 00000806 RAX: dffffc0000000000 RBX: 1ffff10033908f20 RCX: ffffffff81c694cd RDX: 0000000000000000 RSI: dffffc0000000000 RDI: ffffffff897c0b00 RBP: ffff88019c8479c8 R08: 0000000000000000 R09: ffff8801ce0bd3d8 R10: 0000000000000000 R11: dffffc0000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 FS: 00000000023d6940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff7d210ae70 CR3: 000000019c816000 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:00007ffea212da28 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffea212f7d0 RDI: 00007ffea212f7d0 RBP: 00007ffea212f7d0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 00000000023d7940 R13: 0000000000000000 R14: 0000000000000166 R15: 0000000000014eb8 Code: 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 48 c7 c7 00 0b 7c 89 55 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 <48> 89 f8 48 89 e5 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 4c 8b