watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor1:4591] Modules linked in: irq event stamp: 16348208 hardirqs last enabled at (16348207): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (16348207): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (16348207): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (16348207): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (16348207): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (16348208): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (366564): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (366405): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (366405): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4591 Comm: syz-executor1 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:lock_release+0x4d4/0xa10 kernel/locking/lockdep.c:3942 RSP: 0018:ffff88018884f8a0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff10031109f19 RCX: 1ffff10035d611cd RDX: 1ffffffff11a30e5 RSI: 0000000000000005 RDI: 0000000000000286 RBP: ffff88018884f9d0 R08: 1ffff10031109f1d R09: ffffed0039d1af70 R10: 0000000000000003 R11: 0000000000000004 R12: ffff8801aeb08640 R13: ffff8801ce8d7b98 R14: ffff8801aeb08640 R15: ffff88018884f8e8 FS: 0000000002882940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fffeb49fff8 CR3: 0000000188a0b000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __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:00007fffeb4a07d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007fffeb4a2580 RDI: 00007fffeb4a2580 RBP: 00007fffeb4a2580 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000006 R11: 0000000000000206 R12: 0000000002883940 R13: 0000000000000000 R14: 0000000000000146 R15: 000000000001a886 Code: 00 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 a3 03 00 00 48 83 3d 13 80 74 07 00 0f 84 b8 02 00 00 48 8b bd e8 fe ff ff 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4586 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+0xacb/0x5140 kernel/locking/lockdep.c:3454 RSP: 0018:ffff88018e617520 EFLAGS: 00000093 RAX: 0000000000000005 RBX: ffffffff89c2e548 RCX: 0000000000000001 RDX: 1ffff10031cc192e RSI: ffff88018e60c978 RDI: ffffffff89c2e558 RBP: ffff88018e6178a8 R08: 00000000000037d9 R09: 0000000000000004 R10: ffff88018e60ca18 R11: ffff88018e60c140 R12: 1ffff10031cc2ecc R13: 0000000000000000 R14: 328a3295a1251c01 R15: 0000000000000000 FS: 0000000001897940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000018a0978 CR3: 000000018e57f000 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:00007ffc6d3c1f68 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffc6d3c3d10 RDI: 00007ffc6d3c3d10 RBP: 00007ffc6d3c3d10 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000006 R11: 0000000000000202 R12: 0000000001898940 R13: 0000000000000000 R14: 000000000000014a R15: 000000000001a87d Code: c0 74 08 3c 03 0f 8e ae 32 00 00 41 8b 83 30 08 00 00 83 c0 01 41 89 83 30 08 00 00 83 f8 2f 0f 87 4c 0c 00 00 3b 05 85 cf 81 08 <41> bf 01 00 00 00 0f 86 ef f6 ff ff 89 05 73 cf 81 08 e9 e4 f6