watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor1:4586] Modules linked in: irq event stamp: 15577408 hardirqs last enabled at (15577407): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (15577407): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (15577407): [] read_seqbegin include/linux/seqlock.h:433 [inline] hardirqs last enabled at (15577407): [] read_seqbegin_or_lock include/linux/seqlock.h:529 [inline] hardirqs last enabled at (15577407): [] d_walk+0x80f/0xc80 fs/dcache.c:1248 hardirqs last disabled at (15577408): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (6382944): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (6382749): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (6382749): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 4586 Comm: syz-executor1 Not tainted 4.17.0-rc4+ #14 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:select_collect+0x0/0x5f0 include/linux/list.h:106 RSP: 0018:ffff88019f59f9f0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: ffffffff81c5f080 RBX: ffff8801ce6daca0 RCX: ffffffff815e0571 RDX: 1ffff10039cdb5a6 RSI: ffff8801ce6daca0 RDI: ffff88019f59fc10 RBP: ffff88019f59fb78 R08: ffffed0039cdb5a5 R09: ffffed0039cdb5a4 R10: ffffed0039cdb5a4 R11: ffff8801ce6dad23 R12: 0000000000008e68 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88019f59fb50 FS: 00000000023b2940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000023bb978 CR3: 000000019f4ed000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: ffffffffffffff00 DR2: 00000000200001c0 DR3: 00000000200001c0 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:00007fffefe5bc48 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007fffefe5d9f0 RDI: 00007fffefe5d9f0 RBP: 00007fffefe5d9f0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 00000000023b3940 R13: 0000000000000000 R14: 0000000000000ad0 R15: 0000000000079ada Code: ef ff 48 8b 95 20 ff ff ff 48 8b 8d 28 ff ff ff 48 8b 85 30 ff ff ff e9 dc fd ff ff 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 <55> 48 89 e5 41 57 41 56 4c 8d 7d d8 49 be 00 00 00 00 00 fc ff Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4585 Comm: syz-executor0 Not tainted 4.17.0-rc4+ #14 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:debug_lockdep_rcu_enabled.part.1+0xf/0x60 kernel/rcu/update.c:298 RSP: 0018:ffff8801a04ef9d0 EFLAGS: 00000202 RAX: dffffc0000000000 RBX: 0000000000008e68 RCX: ffffffff81c697ce RDX: 0000000000000004 RSI: ffffffff81c697dc RDI: ffffffff8909b8a0 RBP: ffff8801a04ef9d8 R08: ffff8801a04e4080 R09: ffffed003b5e46c2 R10: ffffed003b5e46c2 R11: ffff8801daf23613 R12: 0000000000008e68 R13: dffffc0000000000 R14: ffff8801ce557a20 R15: ffff8801a04efb50 FS: 0000000001fb6940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff97017eec CR3: 00000001a0483000 CR4: 00000000001406e0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: debug_lockdep_rcu_enabled+0x77/0x90 kernel/rcu/update.c:300 rcu_read_unlock include/linux/rcupdate.h:684 [inline] d_walk+0x6c1/0xc80 fs/dcache.c:1327 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:00007ffcff1ff848 EFLAGS: 00000206 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455777 RDX: 0000000000000000 RSI: 00007ffcff2015f0 RDI: 00007ffcff2015f0 RBP: 00007ffcff2015f0 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 0000000001fb7940 R13: 0000000000000000 R14: 0000000000000bad R15: 0000000000079b27 Code: ff 48 8b 7d c8 e8 82 3e 52 00 e9 9c fd ff ff 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 <65> 48 8b 1c 25 c0 ed 01 00 48 8d bb 34 08 00 00 48 89 fa 48 c1