watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor2:4511] Modules linked in: irq event stamp: 9776000 hardirqs last enabled at (9775999): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (9775999): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (9775999): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (9775999): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (9775999): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (9776000): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (381578): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (381433): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (381433): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4511 Comm: syz-executor2 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:ffff8801a1c779f8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801a1c6c600 RBX: 0000000000000293 RCX: 1ffff1003438d9d5 RDX: 0000000000000000 RSI: ffffffff81c6995b RDI: 0000000000000293 RBP: ffff8801a1c77b78 R08: ffff8801a1c6ce38 R09: 0000000000000006 R10: ffff8801a1c6c600 R11: 0000000000000000 R12: 0000000000000200 R13: dffffc0000000000 R14: 1ffff1003438ef82 R15: ffff8801a1c77b50 FS: 00000000014ad940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc0222cb9c CR3: 00000001a23f3000 CR4: 00000000001406f0 DR0: 00000000200001c0 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:00007ffc0222d2a8 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffc0222f050 RDI: 00007ffc0222f050 RBP: 00007ffc0222f050 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 00000000014ae940 R13: 0000000000000000 R14: 000000000000015b R15: 00000000000154e9 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: 4507 Comm: syz-executor7 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_save_flags arch/x86/include/asm/paravirt.h:778 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/paravirt.h:800 [inline] RIP: 0010:lock_release+0xfe/0xa10 kernel/locking/lockdep.c:3935 RSP: 0018:ffff8801a4b778b0 EFLAGS: 00000086 RAX: 0000000000000086 RBX: 1ffff1003496ef1b RCX: 0000000000000000 RDX: 1ffffffff11a316c RSI: 0000000000000001 RDI: ffffffff88d18b60 RBP: ffff8801a4b779e0 R08: 0000000000000000 R09: 0000000000000003 R10: ffff8801a4e16df0 R11: ffff8801a4e16540 R12: ffff8801a4b779b8 R13: ffffffff88c12648 R14: 1ffff1003496ef82 R15: ffff8801a4e16540 FS: 00000000027a1940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000027aa978 CR3: 00000001a4b4c000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: seqcount_lockdep_reader_access include/linux/seqlock.h:82 [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+0x1d5/0xc80 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: 0033:0x455777 RSP: 002b:00007fffc8a4b168 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007fffc8a4cf10 RDI: 00007fffc8a4cf10 RBP: 00007fffc8a4cf10 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 00000000027a2940 R13: 0000000000000000 R14: 0000000000000160 R15: 000000000001553c Code: 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 90 07 00 00 48 83 3d 3a 88 74 07 00 0f 84 83 06 00 00 9c 58 <0f> 1f 44 00 00 48 c7 c7 70 8b d1 88 48 89 85 e8 fe ff ff 48 b8