new mount options do not match the existing superblock, will be ignored XFS (loop0): Invalid superblock magic number BUG: MAX_LOCKDEP_CHAINS too low! turning off the locking correctness validator. CPU: 1 PID: 2097 Comm: syz-executor.0 Not tainted 4.14.231-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 add_chain_cache kernel/locking/lockdep.c:2303 [inline] lookup_chain_cache_add kernel/locking/lockdep.c:2415 [inline] validate_chain kernel/locking/lockdep.c:2435 [inline] __lock_acquire.cold+0x19a/0x97c kernel/locking/lockdep.c:3491 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:160 debug_object_deactivate lib/debugobjects.c:502 [inline] debug_object_deactivate+0xdf/0x2e0 lib/debugobjects.c:491 debug_hrtimer_deactivate kernel/time/hrtimer.c:406 [inline] debug_deactivate kernel/time/hrtimer.c:453 [inline] remove_hrtimer kernel/time/hrtimer.c:912 [inline] hrtimer_try_to_cancel.part.0+0x16f/0x550 kernel/time/hrtimer.c:1017 hrtimer_try_to_cancel kernel/time/hrtimer.c:1035 [inline] hrtimer_cancel+0x17/0x50 kernel/time/hrtimer.c:1037 perf_swevent_cancel_hrtimer kernel/events/core.c:8791 [inline] perf_swevent_cancel_hrtimer kernel/events/core.c:8783 [inline] cpu_clock_event_stop kernel/events/core.c:8842 [inline] cpu_clock_event_del+0xa5/0xc0 kernel/events/core.c:8857 event_sched_out+0x8b3/0x11b0 kernel/events/core.c:1867 group_sched_out+0x13e/0x3c0 kernel/events/core.c:1897 ctx_sched_out+0x4f4/0x9d0 kernel/events/core.c:2852 task_ctx_sched_out+0x5b/0x80 kernel/events/core.c:2320 perf_event_context_sched_out kernel/events/core.c:3035 [inline] __perf_event_task_sched_out+0x853/0x11d0 kernel/events/core.c:3126 perf_event_task_sched_out include/linux/perf_event.h:1104 [inline] prepare_task_switch kernel/sched/core.c:2601 [inline] context_switch kernel/sched/core.c:2773 [inline] __schedule+0xc74/0x1de0 kernel/sched/core.c:3384 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:3508 ___preempt_schedule+0x16/0x18 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] _raw_spin_unlock_irq+0x6c/0x80 kernel/locking/spinlock.c:200 spin_unlock_irq include/linux/spinlock.h:367 [inline] flush_workqueue_prep_pwqs+0x261/0x470 kernel/workqueue.c:2596 flush_workqueue+0x4f4/0x1310 kernel/workqueue.c:2650 drain_workqueue+0x177/0x3e0 kernel/workqueue.c:2789 destroy_workqueue+0x71/0x710 kernel/workqueue.c:4109 xfs_destroy_mount_workqueues+0xef/0x1c0 fs/xfs/xfs_super.c:931 xfs_fs_fill_super+0x801/0x1380 fs/xfs/xfs_super.c:1714 mount_bdev+0x2b3/0x360 fs/super.c:1134 mount_fs+0x92/0x2a0 fs/super.c:1237 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0xe53/0x2a00 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3072 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x4665f9 RSP: 002b:00007fc0a9b0e188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9 RDX: 0000000020000400 RSI: 00000000200001c0 RDI: 0000000020000240 RBP: 00000000004bfbb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007fff54c6048f R14: 00007fc0a9b0e300 R15: 0000000000022000 new mount options do not match the existing superblock, will be ignored ip_tables: iptables: counters copy to user failed while replacing table ip_tables: iptables: counters copy to user failed while replacing table new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored ip_tables: iptables: counters copy to user failed while replacing table new mount options do not match the existing superblock, will be ignored ip_tables: iptables: counters copy to user failed while replacing table new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored ip_tables: iptables: counters copy to user failed while replacing table new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored ip_tables: iptables: counters copy to user failed while replacing table new mount options do not match the existing superblock, will be ignored ip_tables: iptables: counters copy to user failed while replacing table new mount options do not match the existing superblock, will be ignored ip_tables: iptables: counters copy to user failed while replacing table new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored ip_tables: iptables: counters copy to user failed while replacing table new mount options do not match the existing superblock, will be ignored ip_tables: iptables: counters copy to user failed while replacing table new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored base_sock_release(ffff88803908aac0) sk=ffff888097a18e80 new mount options do not match the existing superblock, will be ignored base_sock_release(ffff88802f3b7b00) sk=ffff888054e3e0c0 new mount options do not match the existing superblock, will be ignored net_ratelimit: 4 callbacks suppressed ip6_tables: ip6tables: counters copy to user failed while replacing table new mount options do not match the existing superblock, will be ignored TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. new mount options do not match the existing superblock, will be ignored hugetlbfs: Bad mount option: "-)[" new mount options do not match the existing superblock, will be ignored hugetlbfs: Bad mount option: "-)[" new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. new mount options do not match the existing superblock, will be ignored overlayfs: unrecognized mount option "subj_type=cpuset" or missing value new mount options do not match the existing superblock, will be ignored overlayfs: unrecognized mount option "subj_type=cpuset" or missing value new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored ip6_tables: ip6tables: counters copy to user failed while replacing table new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored ip6_tables: ip6tables: counters copy to user failed while replacing table new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored ip6_tables: ip6tables: counters copy to user failed while replacing table new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored ip6_tables: ip6tables: counters copy to user failed while replacing table new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored ip6_tables: ip6tables: counters copy to user failed while replacing table new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored ip6_tables: ip6tables: counters copy to user failed while replacing table new mount options do not match the existing superblock, will be ignored ip6_tables: ip6tables: counters copy to user failed while replacing table new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored ip6_tables: ip6tables: counters copy to user failed while replacing table