watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor7:4535] Modules linked in: irq event stamp: 11671558 hardirqs last enabled at (11671557): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (11671557): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (11671557): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (11671557): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (11671557): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (11671558): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (6912312): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (6912267): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (6912267): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4535 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:debug_spin_unlock kernel/locking/spinlock_debug.c:100 [inline] RIP: 0010:do_raw_spin_unlock+0x16f/0x2e0 kernel/locking/spinlock_debug.c:134 RSP: 0018:ffff8801a1c37948 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffff8801c9a9e080 RCX: ffffffff815e08fe RDX: 1ffff10039353c11 RSI: 0000000000000004 RDI: ffff8801c9a9e080 RBP: ffff8801a1c379d0 R08: ffffed0039353c11 R09: ffffed0039353c10 R10: ffffed0039353c10 R11: ffff8801c9a9e083 R12: 1ffff10034386f29 R13: ffff8801c9a9e090 R14: ffff8801c9a9e088 R15: 0000000000000001 FS: 0000000001158940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001161978 CR3: 00000001a2006000 CR4: 00000000001406f0 DR0: 00000000200001c0 DR1: 00000000200001c0 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __raw_spin_unlock include/linux/spinlock_api_smp.h:151 [inline] _raw_spin_unlock+0x22/0x30 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:00007ffc43924908 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffc439266b0 RDI: 00007ffc439266b0 RBP: 00007ffc439266b0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 0000000001159940 R13: 0000000000000000 R14: 0000000000000482 R15: 000000000003880d Code: b8 00 00 00 00 00 fc ff df 4c 8d 73 08 4c 89 f2 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 2c 01 00 00 65 8b 05 61 77 a3 7e <39> 43 08 0f 85 e4 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4539 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:strlen+0x5a/0xa0 lib/string.c:482 RSP: 0018:ffff88019f2b76a0 EFLAGS: 00000002 RAX: ffffffff87d34404 RBX: dffffc0000000000 RCX: 0000000000000004 RDX: 0000000000000000 RSI: ffff8801b4a87e58 RDI: ffffffff87d34400 RBP: ffff88019f2b76b8 R08: ffff8801b4a87e58 R09: ffff88019f2b7740 R10: 0000000000000003 R11: 0000000000000004 R12: ffffffff87d34400 R13: ffff8801b4a87e58 R14: dffffc0000000000 R15: ffffffff88d77060 FS: 00000000024f1940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004540ba CR3: 000000019f27b000 CR4: 00000000001406e0 DR0: 0000000020000080 DR1: 0000000020000080 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: trace_event_get_offsets_lock_acquire include/trace/events/lock.h:13 [inline] perf_trace_lock+0xd6/0x900 include/trace/events/lock.h:39 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+0x75f/0xc80 fs/dcache.c:1332 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:00007ffda015b248 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffda015cff0 RDI: 00007ffda015cff0 RBP: 00007ffda015cff0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 00000000024f2940 R13: 0000000000000000 R14: 0000000000000551 R15: 000000000003884a Code: 75 4d 41 80 3c 24 00 74 3b 48 bb 00 00 00 00 00 fc ff df 4c 89 e0 48 83 c0 01 48 89 c2 48 89 c1 48 c1 ea 03 83 e1 07 0f b6 14 1a <38> ca 7f 04 84 d2 75 23 80 38 00 75 de 48 83 c4 08 4c 29 e0 5b