watchdog: BUG: soft lockup - CPU#1 stuck for 134s! [syz-executor0:4562] Modules linked in: irq event stamp: 79117888 hardirqs last enabled at (79117887): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (79117887): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (79117887): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (79117887): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (79117887): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (79117888): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (2224336): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (2224117): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (2224117): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 1 PID: 4562 Comm: syz-executor0 Not tainted 4.17.0-rc7+ #78 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x15/0x20 kernel/kcov.c:174 RSP: 0018:ffff88018a42f9e8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff8801af3fc480 RBX: 0000000000000000 RCX: ffffffff81c66bca RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 RBP: ffff88018a42f9e8 R08: ffff8801af3fc480 R09: 0000000000000004 R10: ffff8801af3fcd58 R11: ffff8801af3fc480 R12: ffff8801b2cbb460 R13: dffffc0000000000 R14: ffff8801b2cbb4e0 R15: ffff88018a42fb50 FS: 0000000001c09940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9b91237000 CR3: 000000018a20b000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_lock include/linux/rcupdate.h:633 [inline] d_walk+0xa0a/0xc80 fs/dcache.c:1303 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:00007ffdddfde448 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffdddfe01f0 RDI: 00007ffdddfe01f0 RBP: 00007ffdddfe01f0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 0000000001c0a940 R13: 0000000000000000 R14: 000000000000027d R15: 0000000000029a01 Code: 00 00 48 89 e5 48 8b 4d 08 e8 c8 fe ff ff 5d c3 66 0f 1f 44 00 00 55 40 0f b6 d6 40 0f b6 f7 bf 01 00 00 00 48 89 e5 48 8b 4d 08 a6 fe ff ff 5d c3 0f 1f 40 00 55 0f b7 d6 0f b7 f7 bf 03 00 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4563 Comm: syz-executor3 Not tainted 4.17.0-rc7+ #78 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:arch_local_save_flags arch/x86/include/asm/paravirt.h:778 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/paravirt.h:800 [inline] RIP: 0010:lock_release+0xfd/0xa10 kernel/locking/lockdep.c:3935 RSP: 0018:ffff880188f1f898 EFLAGS: 00000286 RAX: dffffc0000000000 RBX: 1ffff100311e3f19 RCX: ffffed00311e3f62 RDX: 1ffffffff11a31ac RSI: 0000000000000001 RDI: ffffffff88d18d60 RBP: ffff880188f1f9d0 R08: 0000000000000000 R09: ffffed00365fbdac R10: ffffed00365fbdac R11: ffff8801b2fded63 R12: ffff880188f1f9a8 R13: ffff8801b2fded78 R14: ffff8801b2fded60 R15: ffff8801ae552640 FS: 0000000002253940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000007011b8 CR3: 0000000188ef5000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 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:00007ffedf57d438 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffedf57f1e0 RDI: 00007ffedf57f1e0 RBP: 00007ffedf57f1e0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 0000000002254940 R13: 0000000000000000 R14: 00000000000002a1 R15: 00000000000299de Code: 88 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 90 07 00 00 48 83 3d da 78 74 07 00 0f 84 83 06 00 00 9c <58> 0f 1f 44 00 00 48 c7 c7 70 8d d1 88 48 89 85 e8 fe ff ff 48