watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor1:4524] Modules linked in: irq event stamp: 16218758 hardirqs last enabled at (16218757): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (16218757): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (16218757): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (16218757): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (16218757): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (16218758): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (1192900): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (1192801): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (1192801): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4524 Comm: syz-executor1 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: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:ffff8801a0ed79f8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801a0ece6c0 RBX: 0000000000000293 RCX: 1ffff100341d9ded RDX: 0000000000000000 RSI: ffffffff81c6995b RDI: 0000000000000293 RBP: ffff8801a0ed7b78 R08: ffff8801a0eceef8 R09: 0000000000000006 R10: ffff8801a0ece6c0 R11: 0000000000000000 R12: 0000000000000200 R13: dffffc0000000000 R14: 1ffff100341daf82 R15: ffff8801a0ed7b50 FS: 0000000001d38940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001d499b8 CR3: 00000001a0eb3000 CR4: 00000000001406f0 DR0: 0000000020000000 DR1: 00000000200001c0 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: 0033:0x455777 RSP: 002b:00007ffd6825dde8 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffd6825ef50 RDI: 00007ffd6825ef50 RBP: 00007ffd6825ef50 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000005 R11: 0000000000000206 R12: 0000000001d41980 R13: 0000000000000000 R14: 0000000000000306 R15: 00000000000271c9 Code: 88 48 89 f8 48 c1 e8 03 42 80 3c 28 00 0f 85 1e 04 00 00 48 83 3d 18 f2 0a 07 00 0f 84 29 02 00 00 e8 35 94 b2 ff 48 89 df 57 9d <0f> 1f 44 00 00 e8 26 94 b2 ff 49 8d 5f 80 48 c1 eb 03 4c 01 eb Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4519 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:__lock_acquire+0x1e5/0x5140 kernel/locking/lockdep.c:3290 RSP: 0018:ffff8801d07d7520 EFLAGS: 00000086 RAX: 0000000000000000 RBX: ffffffff89c2cea8 RCX: ffffed003a0faeb8 RDX: 1ffff10039f97db6 RSI: ffff8801cfcbedb8 RDI: ffffed003a0faec0 RBP: ffff8801d07d78a8 R08: 000000000000616a R09: 0000000000000003 R10: ffff8801cfcbee30 R11: ffff8801cfcbe580 R12: 1ffff1003a0faecc R13: 0000000000000000 R14: dad3e89909b3f579 R15: 0000000000000001 FS: 0000000000dcb940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000dd4978 CR3: 00000001cfcb3000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:310 [inline] d_walk+0x261/0xc80 fs/dcache.c:1250 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:00007fff8b3da828 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007fff8b3dc5d0 RDI: 00007fff8b3dc5d0 RBP: 00007fff8b3dc5d0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 0000000000dcc940 R13: 0000000000000000 R14: 0000000000000309 R15: 00000000000271cf Code: 48 89 c3 0f 85 ad 00 00 00 45 31 ff 48 b9 00 00 00 00 00 fc ff df 31 c0 48 03 8c 24 98 00 00 00 48 8d 79 08 48 c7 01 00 00 00 00 <48> 83 e7 f8 48 c7 41 50 00 00 00 00 48 29 f9 83 c1 58 c1 e9 03