lo speed is unknown, defaulting to 1000 BUG: MAX_LOCKDEP_ENTRIES too low! turning off the locking correctness validator. CPU: 0 PID: 24700 Comm: syz-executor.2 Not tainted 5.12.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x141/0x1d7 lib/dump_stack.c:120 alloc_list_entry kernel/locking/lockdep.c:1353 [inline] add_lock_to_list.constprop.0.cold+0x11/0x18 kernel/locking/lockdep.c:1374 check_prev_add kernel/locking/lockdep.c:3007 [inline] check_prevs_add kernel/locking/lockdep.c:3060 [inline] validate_chain kernel/locking/lockdep.c:3675 [inline] __lock_acquire+0x2f37/0x54c0 kernel/locking/lockdep.c:4901 lock_acquire kernel/locking/lockdep.c:5511 [inline] lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5476 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:159 stack_depot_save+0x1cd/0x4e0 lib/stackdepot.c:308 kasan_save_stack+0x32/0x40 mm/kasan/common.c:40 kasan_record_aux_stack+0xe5/0x110 mm/kasan/generic.c:345 __call_rcu kernel/rcu/tree.c:3039 [inline] call_rcu+0xb1/0x740 kernel/rcu/tree.c:3114 put_task_struct_rcu_user+0x7f/0xb0 kernel/exit.c:179 context_switch kernel/sched/core.c:4325 [inline] __schedule+0x919/0x21b0 kernel/sched/core.c:5073 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:5233 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:35 vprintk_emit+0x1fb/0x560 kernel/printk/printk.c:2099 vprintk_func+0x8d/0x1e0 kernel/printk/printk_safe.c:401 printk+0xba/0xed kernel/printk/printk.c:2146 ib_get_eth_speed.cold+0x19/0x1e drivers/infiniband/core/verbs.c:1828 rxe_query_port+0x13d/0x2d0 drivers/infiniband/sw/rxe/rxe_verbs.c:41 __ib_query_port drivers/infiniband/core/device.c:2055 [inline] ib_query_port drivers/infiniband/core/device.c:2090 [inline] ib_query_port+0x4ec/0xa00 drivers/infiniband/core/device.c:2080 add_port drivers/infiniband/core/sysfs.c:1064 [inline] ib_setup_port_attrs+0x1ee/0x14f0 drivers/infiniband/core/sysfs.c:1395 add_one_compat_dev+0x4ab/0x800 drivers/infiniband/core/device.c:968 rdma_dev_init_net+0x2dc/0x480 drivers/infiniband/core/device.c:1184 ops_init+0xaf/0x470 net/core/net_namespace.c:140 setup_net+0x40f/0xa30 net/core/net_namespace.c:333 copy_net_ns+0x31e/0x760 net/core/net_namespace.c:474 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0xbd/0x1f0 kernel/nsproxy.c:226 ksys_unshare+0x445/0x8e0 kernel/fork.c:2998 __do_sys_unshare kernel/fork.c:3066 [inline] __se_sys_unshare kernel/fork.c:3064 [inline] __x64_sys_unshare+0x2d/0x40 kernel/fork.c:3064 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665f9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc85e485188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 00000000004bfce1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007fff15e77c6f R14: 00007fc85e485300 R15: 0000000000022000