watchdog: BUG: soft lockup - CPU#1 stuck for 134s! [syz-executor4:4609] Modules linked in: irq event stamp: 90415210 hardirqs last enabled at (90415209): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (90415209): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (90415209): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (90415209): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (90415209): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (90415210): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (27777796): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (27777539): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (27777539): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 1 PID: 4609 Comm: syz-executor4 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:ffff88019ee179f8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff88019ee0e3c0 RBX: 0000000000000293 RCX: 1ffff10033dc1d8d RDX: 0000000000000000 RSI: ffffffff81c7155b RDI: 0000000000000293 RBP: ffff88019ee17b78 R08: ffff88019ee0ebf8 R09: 0000000000000006 R10: ffff88019ee0e3c0 R11: 0000000000000000 R12: 0000000000000200 R13: dffffc0000000000 R14: 1ffff10033dc2f82 R15: ffff88019ee17b50 FS: 0000000002305940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6368157c20 CR3: 000000019f29c000 CR4: 00000000001406e0 DR0: 00000000200001c0 DR1: 0000000020000080 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:00007fff32be0778 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455767 RDX: 0000000000000000 RSI: 00007fff32be2520 RDI: 00007fff32be2520 RBP: 00007fff32be2520 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 0000000002306940 R13: 0000000000000000 R14: 0000000000003074 R15: 0000000000220b6b 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: 4612 Comm: syz-executor1 Not tainted 4.17.0-rc7+ #38 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:validate_chain kernel/locking/lockdep.c:2387 [inline] RIP: 0010:__lock_acquire+0xa21/0x5140 kernel/locking/lockdep.c:3431 RSP: 0018:ffff88019d2c7530 EFLAGS: 00000046 RAX: 1ffffffff13a911b RBX: ffffffff89d488c8 RCX: ffff88019d2c76b0 RDX: 1ffff10033a58ed6 RSI: ffff88019d2b8cb8 RDI: ffffffff89d488d8 RBP: ffff88019d2c78c0 R08: 000000000000124d R09: 0000000000000003 R10: ffff88019d2b8d30 R11: ffff88019d2b8480 R12: ffffed0033a58ed6 R13: dffffc0000000000 R14: e42e59b45af75761 R15: 0000000000000000 FS: 00000000021a8940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b33923000 CR3: 000000019d117000 CR4: 00000000001406f0 DR0: 00000000200001c0 DR1: 00000000200001c0 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920 seqcount_lockdep_reader_access include/linux/seqlock.h:81 [inline] read_seqcount_begin include/linux/seqlock.h:164 [inline] read_seqbegin include/linux/seqlock.h:433 [inline] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] d_walk+0x1c0/0xc80 fs/dcache.c:1248 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:00007ffe9ac02b08 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455767 RDX: 0000000000000000 RSI: 00007ffe9ac048b0 RDI: 00007ffe9ac048b0 RBP: 00007ffe9ac048b0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 00000000021a9940 R13: 0000000000000000 R14: 000000000000307e R15: 0000000000220b57 Code: fc ff df 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 21 32 00 00 41 8b 42 20 25 00 80 04 00 3d 00 00 04 00 0f 84 be 03 00 00 <48> c7 c2 e0 c8 09 89 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03