watchdog: BUG: soft lockup - CPU#1 stuck for 134s! [syz-executor7:4631] Modules linked in: irq event stamp: 69453926 hardirqs last enabled at (69453925): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (69453925): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (69453925): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (69453925): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (69453925): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (69453926): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (3366226): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (3365999): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (3365999): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 1 PID: 4631 Comm: syz-executor7 Not tainted 4.17.0-rc7+ #37 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:ffff88019cc679f8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801ae12a000 RBX: 0000000000000293 RCX: 1ffff10035c25515 RDX: 0000000000000000 RSI: ffffffff81c706bb RDI: 0000000000000293 RBP: ffff88019cc67b78 R08: ffff8801ae12a838 R09: 0000000000000006 R10: ffff8801ae12a000 R11: 0000000000000000 R12: 0000000000000200 R13: dffffc0000000000 R14: 1ffff1003398cf82 R15: ffff88019cc67b50 FS: 000000000104e940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000010a7978 CR3: 000000019cc45000 CR4: 00000000001406e0 DR0: 0000000020000000 DR1: 0000000000000000 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:00007fff34be9b98 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007fff34beb940 RDI: 00007fff34beb940 RBP: 00007fff34beb940 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 000000000104f940 R13: 0000000000000000 R14: 0000000000000470 R15: 0000000000048878 Code: 88 48 89 f8 48 c1 e8 03 42 80 3c 28 00 0f 85 1e 04 00 00 48 83 3d b8 86 0a 07 00 0f 84 29 02 00 00 e8 25 36 b2 ff 48 89 df 57 9d <0f> 1f 44 00 00 e8 16 36 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: 4632 Comm: syz-executor3 Not tainted 4.17.0-rc7+ #37 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:debug_lockdep_rcu_enabled+0x6e/0x90 kernel/rcu/update.c:300 RSP: 0018:ffff88019ce7f890 EFLAGS: 00000097 RAX: 0000000000000001 RBX: 1ffff100339cff19 RCX: ffffed00339cff62 RDX: 0000000000000004 RSI: 0000000000000001 RDI: ffffffff8909caa0 RBP: ffff88019ce7f890 R08: 0000000000000000 R09: ffffed0039361970 R10: ffffed0039361970 R11: ffff8801c9b0cb83 R12: ffff88019ce7f9a8 R13: ffff8801c9b0cb98 R14: ffff8801c9b0cb80 R15: ffff88019ce72380 FS: 0000000001a6b940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2cb22000 CR3: 000000019cdce000 CR4: 00000000001406f0 DR0: 00000000200001c0 DR1: 00000000200001c0 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 000000000000060a Call Trace: trace_lock_release include/trace/events/lock.h:58 [inline] lock_release+0x6f2/0xa10 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: 0033:0x455777 RSP: 002b:00007ffef41bf028 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffef41c0dd0 RDI: 00007ffef41c0dd0 RBP: 00007ffef41c0dd0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 0000000001a6c940 R13: 0000000000000000 R14: 000000000000046d R15: 0000000000048869 Code: b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 1c 8b 05 92 15 a6 07 <85> c0 74 07 e8 29 ff ff ff 5d c3 31 c0 5d c3 e8 ae 98 52 00 eb