watchdog: BUG: soft lockup - CPU#1 stuck for 134s! [syz-executor4:4617] Modules linked in: irq event stamp: 62722160 hardirqs last enabled at (62722159): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (62722159): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (62722159): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (62722159): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (62722159): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (62722160): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (207742): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (206795): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (206795): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 1 PID: 4617 Comm: syz-executor4 Not tainted 4.17.0-rc6+ #23 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_acquire+0x257/0x520 kernel/locking/lockdep.c:3923 RSP: 0018:ffff88019d42f8d8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff10033a85f20 RCX: 0000000000000000 RDX: 1ffffffff11a30e5 RSI: ffff8801ad43e938 RDI: 0000000000000286 RBP: ffff88019d42f9c8 R08: 0000000000001511 R09: 0000000000000004 R10: ffff8801ad43e9d8 R11: ffff8801ad43e100 R12: ffff8801ad43e100 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 FS: 0000000002212940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000221b978 CR3: 000000019dbfd000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: _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:00007ffe3a6d2948 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffe3a6d46f0 RDI: 00007ffe3a6d46f0 RBP: 00007ffe3a6d46f0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 0000000002213940 R13: 0000000000000000 R14: 00000000000000fa R15: 00000000000128e2 Code: 00 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 5e 02 00 00 48 83 3d 60 7f 74 07 00 0f 84 c8 01 00 00 48 8b bd 20 ff 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4621 Comm: syz-executor1 Not tainted 4.17.0-rc6+ #23 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:mark_lock+0x14d/0x19e0 kernel/locking/lockdep.c:3114 RSP: 0018:ffff88019bc57830 EFLAGS: 00000082 RAX: 0000000000000001 RBX: ffffed003378af0b RCX: 1ffff10033789990 RDX: 1ffffffff144f3a0 RSI: ffff88019bc4cc60 RDI: ffffffff8a279d00 RBP: ffff88019bc57960 R08: 0000000000000006 R09: 0000000000000006 R10: ffff88019bc4c400 R11: 0000000000000000 R12: ffff88019bc4cc60 R13: 0000000000000001 R14: ffffffff8a279cd0 R15: 0000000000000040 FS: 000000000259a940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004ce280 CR3: 000000019bd1f000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mark_held_locks+0xc9/0x160 kernel/locking/lockdep.c:2807 __trace_hardirqs_on_caller kernel/locking/lockdep.c:2836 [inline] trace_hardirqs_on_caller+0x421/0x5c0 kernel/locking/lockdep.c:2883 trace_hardirqs_on+0xd/0x10 kernel/locking/lockdep.c:2890 seqcount_lockdep_reader_access include/linux/seqlock.h:83 [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+0x80f/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:00007ffc40302bc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffc40304970 RDI: 00007ffc40304970 RBP: 00007ffc40304970 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000202 R12: 000000000259b940 R13: 0000000000000000 R14: 00000000000000fa R15: 00000000000124d3 Code: 0f 84 8d 00 00 00 41 bd 01 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 01 c3 44 89 e8 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 <48> c7 43 10 00 00 00 00 c7 43 18 00 00 00 00 48 81 c4 08 01 00