watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor2:4571] Modules linked in: irq event stamp: 12657832 hardirqs last enabled at (12657831): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (12657831): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (12657831): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (12657831): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (12657831): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (12657832): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (469588): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (469527): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (469527): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4571 Comm: syz-executor2 Not tainted 4.17.0-rc5+ #57 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:ffff88019c3f79f8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801b244e780 RBX: 0000000000000293 RCX: 1ffff10036489e05 RDX: 0000000000000000 RSI: ffffffff81c6503b RDI: 0000000000000293 RBP: ffff88019c3f7b78 R08: ffff8801b244efb8 R09: 0000000000000006 R10: ffff8801b244e780 R11: 0000000000000000 R12: 0000000000000200 R13: dffffc0000000000 R14: 1ffff1003387ef82 R15: ffff88019c3f7b50 FS: 0000000002586940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020989000 CR3: 000000019c2f1000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 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:00007fffe0ba5dc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007fffe0ba7b70 RDI: 00007fffe0ba7b70 RBP: 00007fffe0ba7b70 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000006 R11: 0000000000000202 R12: 0000000002587940 R13: 0000000000000000 R14: 000000000000015c R15: 000000000001837f Code: 88 48 89 f8 48 c1 e8 03 42 80 3c 28 00 0f 85 1e 04 00 00 48 83 3d f8 36 0b 07 00 0f 84 29 02 00 00 e8 b5 de b2 ff 48 89 df 57 9d <0f> 1f 44 00 00 e8 a6 de 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: 4570 Comm: syz-executor7 Not tainted 4.17.0-rc5+ #57 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:separate_irq_context kernel/locking/lockdep.c:3074 [inline] RIP: 0010:__lock_acquire+0x927/0x5140 kernel/locking/lockdep.c:3422 RSP: 0018:ffff88019c3bf520 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: 0000000000000111 RCX: 0000000000000001 RDX: 98baf3c4bc3101bd RSI: ffff88019c3b0cf8 RDI: ffff88019c3b0db9 RBP: ffff88019c3bf8a8 R08: 0000000000000008 R09: 0000000000000004 R10: ffff88019c3b0d98 R11: ffff88019c3b04c0 R12: 0000000000000111 R13: 0000000000000000 R14: 0000000000000004 R15: 0000000000000000 FS: 00000000019b5940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c42e42a010 CR3: 000000019c314000 CR4: 00000000001426e0 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_nested+0x28/0x40 kernel/locking/spinlock.c:354 d_walk+0x3ad/0xc80 fs/dcache.c:1274 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:00007fff112ecc48 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007fff112ee9f0 RDI: 00007fff112ee9f0 RBP: 00007fff112ee9f0 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000006 R11: 0000000000000206 R12: 00000000019b6940 R13: 0000000000000000 R14: 0000000000000164 R15: 0000000000018380 Code: e9 03 0f b6 04 01 48 89 f9 83 e1 07 38 c8 7f 08 84 c0 0f 85 7c 32 00 00 49 8d 7a 21 45 0f b6 6d 21 48 b8 00 00 00 00 00 fc ff df <48> 89 f9 48 c1 e9 03 0f b6 04 01 48 89 f9 83 e1 07 38 c8 7f 08