watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor7:4539] Modules linked in: irq event stamp: 21473646 hardirqs last enabled at (21473645): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (21473645): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (21473645): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (21473645): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (21473645): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (21473646): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (10283718): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (10283547): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (10283547): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4539 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: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:ffff88019f7d79f8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff88019f7ce340 RBX: 0000000000000293 RCX: 1ffff10033ef9d7d RDX: 0000000000000000 RSI: ffffffff81c6503b RDI: 0000000000000293 RBP: ffff88019f7d7b78 R08: ffff88019f7ceb78 R09: 0000000000000006 R10: ffff88019f7ce340 R11: 0000000000000000 R12: 0000000000000200 R13: dffffc0000000000 R14: 1ffff10033efaf82 R15: ffff88019f7d7b50 FS: 00000000011f0940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000011f9978 CR3: 000000019ed1e000 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:00007ffe24fc7f78 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffe24fc9d20 RDI: 00007ffe24fc9d20 RBP: 00007ffe24fc9d20 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000006 R11: 0000000000000206 R12: 00000000011f1940 R13: 0000000000000000 R14: 0000000000000bc6 R15: 00000000000a92ed 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: 588 Comm: syz-executor0 Not tainted 4.17.0-rc5+ #57 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__lock_acquire+0xa7e/0x5140 kernel/locking/lockdep.c:3434 RSP: 0018:ffff8801983e7520 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffffffff89c2cdc8 RCX: 0000000000000001 RDX: 1ffff100358fad65 RSI: ffff8801ac7d6b38 RDI: ffffffff89c2cdd8 RBP: ffff8801983e78a8 R08: 00000000000075fe R09: 0000000000000003 R10: ffff8801ac7d6bb0 R11: ffff8801ac7d6300 R12: 1ffff1003307cecc R13: 0000000000000000 R14: e587338c2ceab941 R15: 0000000000000000 FS: 0000000000b43940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd7c5a1cbc CR3: 00000001985a1000 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 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:00007ffd7c5a23c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffd7c5a4170 RDI: 00007ffd7c5a4170 RBP: 00007ffd7c5a4170 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000006 R11: 0000000000000202 R12: 0000000000b44940 R13: 0000000000000000 R14: 00000000000003fc R15: 00000000000a928a Code: 8b 0d 57 22 ad 07 85 c9 0f 84 62 f7 ff ff 48 b8 00 00 00 00 00 fc ff df 48 8b 54 24 78 48 c1 ea 03 80 3c 02 00 0f 85 fd 32 00 00 <48> 8b 94 24 88 00 00 00 4d 89 b3 28 08 00 00 48 b8 00 00 00 00