watchdog: BUG: soft lockup - CPU#1 stuck for 134s! [syz-executor5:18225] Modules linked in: irq event stamp: 60047220 hardirqs last enabled at (60047219): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (60047219): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (60047219): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (60047219): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (60047219): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (60047220): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (1879314): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (1879205): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (1879205): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 1 PID: 18225 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:arch_local_irq_restore arch/x86/include/asm/paravirt.h:783 [inline] RIP: 0010:seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] RIP: 0010:read_seqcount_begin include/linux/seqlock.h:164 [inline] RIP: 0010:read_seqbegin include/linux/seqlock.h:433 [inline] RIP: 0010:read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] RIP: 0010:d_walk+0x840/0xc80 fs/dcache.c:1248 RSP: 0018:ffff8801a86379f8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff880197b5a480 RBX: 0000000000000293 RCX: 1ffff10032f6b5a5 RDX: 0000000000000000 RSI: ffffffff81c7155b RDI: 0000000000000293 RBP: ffff8801a8637b78 R08: ffff880197b5acb8 R09: 0000000000000006 R10: ffff880197b5a480 R11: 0000000000000000 R12: 0000000000000200 R13: dffffc0000000000 R14: 1ffff100350c6f82 R15: ffff8801a8637b50 FS: 000000000236f940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffce5d70fe8 CR3: 00000001a36f6000 CR4: 00000000001406e0 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: 0033:0x455767 RSP: 002b:00007ffce5d711b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455767 RDX: 0000000000000000 RSI: 00007ffce5d72f60 RDI: 00007ffce5d72f60 RBP: 00007ffce5d72f60 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 0000000002370940 R13: 0000000000000000 R14: 0000000000000439 R15: 0000000000061303 Code: 88 48 89 f8 48 c1 e8 03 42 80 3c 28 00 0f 85 1e 04 00 00 48 83 3d 18 78 0a 07 00 0f 84 29 02 00 00 e8 05 1e b2 ff 48 89 df 57 9d <0f> 1f 44 00 00 e8 f6 1d b2 ff 49 8d 5f 80 48 c1 eb 03 4c 01 eb Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4556 Comm: syz-executor3 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+0x4d/0x900 include/trace/events/lock.h:39 RSP: 0018:ffff88019d8ff6c8 EFLAGS: 00000082 RAX: ffffed0033b1fee1 RBX: 1ffff10033b1fee1 RCX: ffffed0033b1ff62 RDX: dffffc0000000000 RSI: ffff88019a00c778 RDI: ffffffff88d77160 RBP: ffff88019d8ff890 R08: ffff88019a00c778 R09: ffffed00334018ec R10: ffffed00334018ec R11: ffff88019a00c763 R12: ffff88019d8ff868 R13: ffff88019a00c778 R14: dffffc0000000000 R15: ffffffff88d77160 FS: 0000000001dc3940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004da3a0 CR3: 000000019d8bf000 CR4: 00000000001406f0 DR0: 00000000200001c0 DR1: 00000000200001c0 DR2: 00000000200001c0 DR3: 0000000000000000 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 __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:00007fff2b191208 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455767 RDX: 0000000000000000 RSI: 00007fff2b192fb0 RDI: 00007fff2b192fb0 RBP: 00007fff2b192fb0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 0000000001dc4940 R13: 0000000000000000 R14: 00000000000007f2 R15: 0000000000060ee5 Code: 8d 9d 78 fe ff ff 48 c1 eb 03 48 8d 04 13 48 81 ec a0 01 00 00 48 c7 85 78 fe ff ff b3 8a b5 41 48 c7 85 80 fe ff ff e0 5b 9c 88 <48> c7 85 88 fe ff ff 60 ed 5b 81 c7 00 f1 f1 f1 f1 c7 40 04 04