watchdog: BUG: soft lockup - CPU#1 stuck for 134s! [syz-executor4:4567] Modules linked in: irq event stamp: 87358168 hardirqs last enabled at (87358167): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (87358167): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (87358167): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (87358167): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (87358167): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (87358168): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (17320128): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (17320063): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (17320063): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 1 PID: 4567 Comm: syz-executor4 Not tainted 4.17.0-rc7+ #38 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:ffff88019f2f78a0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff10033e5ef19 RCX: 1ffff10033e5d145 RDX: 1ffffffff11a31ad RSI: 0000000000000005 RDI: 0000000000000286 RBP: ffff88019f2f79d0 R08: 1ffff10033e5ef1d R09: ffff88019f2f7728 R10: 0000000000000003 R11: 0000000000000004 R12: ffff88019f2e8200 R13: ffff8801ce334618 R14: ffff88019f2e8200 R15: ffff88019f2f78e8 FS: 0000000002748940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000406eab CR3: 000000019f201000 CR4: 00000000001406e0 DR0: 0000000020000000 DR1: 0000000020000080 DR2: 0000000000000000 DR3: 0000000000000000 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: 0033:0x455767 RSP: 002b:00007ffdd7a70e88 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455767 RDX: 0000000000000000 RSI: 00007ffdd7a72c30 RDI: 00007ffdd7a72c30 RBP: 00007ffdd7a72c30 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 0000000002749940 R13: 0000000000000000 R14: 0000000000001e95 R15: 000000000014e245 Code: 00 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 a3 03 00 00 48 83 3d 13 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4571 Comm: syz-executor5 Not tainted 4.17.0-rc7+ #38 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:perf_trace_lock+0x4c9/0x900 include/trace/events/lock.h:39 RSP: 0018:ffff88019db2f6d8 EFLAGS: 00000003 RAX: 0000000000000000 RBX: fffffffffffffffb RCX: 0000000000000000 RDX: 000000000000000b RSI: dffffc0000000000 RDI: ffffed0033b65f08 RBP: ffff88019db2f8a0 R08: ffffffff88c12648 R09: ffff88019db2f738 R10: ffff88019db26bb0 R11: ffff88019db26300 R12: ffff88019db2f878 R13: ffffe8ffffca5000 R14: 1ffff10033b65f07 R15: ffffffff88d77160 FS: 0000000001029940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004bae6a CR3: 000000019db13000 CR4: 00000000001406f0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 00000000200001c0 DR3: 0000000020000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: trace_lock_release include/trace/events/lock.h:58 [inline] lock_release+0x5e6/0xa10 kernel/locking/lockdep.c:3938 seqcount_lockdep_reader_access include/linux/seqlock.h:82 [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+0x1d5/0xc80 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: 0033:0x455767 RSP: 002b:00007ffff3e8fd78 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455767 RDX: 0000000000000000 RSI: 00007ffff3e91b20 RDI: 00007ffff3e91b20 RBP: 00007ffff3e91b20 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 000000000102a940 R13: 0000000000000000 R14: 0000000000001eb7 R15: 000000000014e24b Code: fc ff df 48 01 c3 31 c0 48 8d 7b 08 48 c7 03 00 00 00 00 48 83 e7 f8 48 c7 43 24 00 00 00 00 48 29 fb 8d 4b 2c c1 e9 03 f3 48 ab <48> 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 b8 18 00 07 00 ba