netlink: 'syz-executor.4': attribute type 1 has an invalid length.
FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 1
======================================================
WARNING: possible circular locking dependency detected
6.7.0-rc6-syzkaller-00157-g7c5e046bdcb2 #0 Not tainted
------------------------------------------------------
syz-executor.4/5640 is trying to acquire lock:
ffffffff8ceb8920 (console_owner){....}-{0:0}, at: console_lock_spinning_enable kernel/printk/printk.c:1854 [inline]
ffffffff8ceb8920 (console_owner){....}-{0:0}, at: console_emit_next_record kernel/printk/printk.c:2895 [inline]
ffffffff8ceb8920 (console_owner){....}-{0:0}, at: console_flush_all+0x49a/0xd60 kernel/printk/printk.c:2967

but task is already holding lock:
ffff8880b983c718 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:558

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #4 (&rq->__lock){-.-.}-{2:2}:
       _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378
       raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:558
       raw_spin_rq_lock kernel/sched/sched.h:1349 [inline]
       rq_lock kernel/sched/sched.h:1663 [inline]
       task_fork_fair+0x70/0x240 kernel/sched/fair.c:12586
       sched_cgroup_fork+0x3cf/0x510 kernel/sched/core.c:4812
       copy_process+0x4c86/0x73f0 kernel/fork.c:2609
       kernel_clone+0xfd/0x930 kernel/fork.c:2907
       user_mode_thread+0xb4/0xf0 kernel/fork.c:2985
       rest_init+0x27/0x2b0 init/main.c:695
       arch_call_rest_init+0x13/0x30 init/main.c:827
       start_kernel+0x39f/0x480 init/main.c:1072
       x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:555
       x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:536
       secondary_startup_64_no_verify+0x166/0x16b

-> #3 (&p->pi_lock){-.-.}-{2:2}:
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162
       class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:518 [inline]
       try_to_wake_up+0xb0/0x13d0 kernel/sched/core.c:4226
       __wake_up_common+0x129/0x1d0 kernel/sched/wait.c:89
       __wake_up_common_lock kernel/sched/wait.c:106 [inline]
       __wake_up+0x31/0x50 kernel/sched/wait.c:127
       tty_port_default_wakeup+0x2a/0x40 drivers/tty/tty_port.c:69
       serial8250_tx_chars+0x542/0x890 drivers/tty/serial/8250/8250_port.c:1835
       serial8250_handle_irq+0x5be/0x760 drivers/tty/serial/8250/8250_port.c:1942
       serial8250_default_handle_irq+0x94/0x210 drivers/tty/serial/8250/8250_port.c:1962
       serial8250_interrupt+0xfc/0x200 drivers/tty/serial/8250/8250_core.c:127
       __handle_irq_event_percpu+0x22a/0x750 kernel/irq/handle.c:158
       handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
       handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:210
       handle_edge_irq+0x261/0xcf0 kernel/irq/chip.c:831
       generic_handle_irq_desc include/linux/irqdesc.h:161 [inline]
       handle_irq arch/x86/kernel/irq.c:238 [inline]
       __common_interrupt+0xdb/0x240 arch/x86/kernel/irq.c:257
       common_interrupt+0xab/0xd0 arch/x86/kernel/irq.c:247
       asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:640
       __get_user_8+0x14/0x20 arch/x86/lib/getuser.S:88
       rseq_get_rseq_cs kernel/rseq.c:161 [inline]
       rseq_ip_fixup kernel/rseq.c:281 [inline]
       __rseq_handle_notify_resume+0x183/0x1020 kernel/rseq.c:329
       rseq_handle_notify_resume include/linux/sched.h:2361 [inline]
       resume_user_mode_work include/linux/resume_user_mode.h:61 [inline]
       exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
       exit_to_user_mode_prepare+0x170/0x240 kernel/entry/common.c:204
       __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
       syscall_exit_to_user_mode+0x1e/0x60 kernel/entry/common.c:296
       do_syscall_64+0x4d/0x110 arch/x86/entry/common.c:89
       entry_SYSCALL_64_after_hwframe+0x63/0x6b

-> #2 (&tty->write_wait){-.-.}-{2:2}:
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162
       __wake_up_common_lock kernel/sched/wait.c:105 [inline]
       __wake_up+0x1c/0x50 kernel/sched/wait.c:127
       tty_port_default_wakeup+0x2a/0x40 drivers/tty/tty_port.c:69
       serial8250_tx_chars+0x542/0x890 drivers/tty/serial/8250/8250_port.c:1835
       serial8250_handle_irq+0x5be/0x760 drivers/tty/serial/8250/8250_port.c:1942
       serial8250_default_handle_irq+0x94/0x210 drivers/tty/serial/8250/8250_port.c:1962
       serial8250_interrupt+0xfc/0x200 drivers/tty/serial/8250/8250_core.c:127
       __handle_irq_event_percpu+0x22a/0x750 kernel/irq/handle.c:158
       handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
       handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:210
       handle_edge_irq+0x261/0xcf0 kernel/irq/chip.c:831
       generic_handle_irq_desc include/linux/irqdesc.h:161 [inline]
       handle_irq arch/x86/kernel/irq.c:238 [inline]
       __common_interrupt+0xdb/0x240 arch/x86/kernel/irq.c:257
       common_interrupt+0xab/0xd0 arch/x86/kernel/irq.c:247
       asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:640
       __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
       _raw_spin_unlock_irqrestore+0x31/0x70 kernel/locking/spinlock.c:194
       spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
       uart_port_unlock_irqrestore include/linux/serial_core.h:667 [inline]
       uart_write+0x316/0x5b0 drivers/tty/serial/serial_core.c:617
       process_output_block drivers/tty/n_tty.c:574 [inline]
       n_tty_write+0x422/0x1130 drivers/tty/n_tty.c:2379
       iterate_tty_write drivers/tty/tty_io.c:1021 [inline]
       file_tty_write.constprop.0+0x519/0x9b0 drivers/tty/tty_io.c:1092
       tty_write drivers/tty/tty_io.c:1113 [inline]
       redirected_tty_write drivers/tty/tty_io.c:1136 [inline]
       redirected_tty_write+0xa6/0xc0 drivers/tty/tty_io.c:1116
       call_write_iter include/linux/fs.h:2020 [inline]
       new_sync_write fs/read_write.c:491 [inline]
       vfs_write+0x64f/0xdf0 fs/read_write.c:584
       ksys_write+0x12f/0x250 fs/read_write.c:637
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x63/0x6b

-> #1 (&port_lock_key){-.-.}-{2:2}:
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162
       uart_port_lock_irqsave include/linux/serial_core.h:616 [inline]
       serial8250_console_write+0xa7c/0x1060 drivers/tty/serial/8250/8250_port.c:3403
       console_emit_next_record kernel/printk/printk.c:2901 [inline]
       console_flush_all+0x4d5/0xd60 kernel/printk/printk.c:2967
       console_unlock+0x10c/0x260 kernel/printk/printk.c:3036
       vprintk_emit+0x17f/0x5f0 kernel/printk/printk.c:2303
       vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45
       _printk+0xc8/0x100 kernel/printk/printk.c:2328
       register_console+0xa74/0x1060 kernel/printk/printk.c:3542
       univ8250_console_init+0x35/0x50 drivers/tty/serial/8250/8250_core.c:717
       console_init+0xba/0x5d0 kernel/printk/printk.c:3688
       start_kernel+0x25a/0x480 init/main.c:1008
       x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:555
       x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:536
       secondary_startup_64_no_verify+0x166/0x16b

-> #0 (console_owner){....}-{0:0}:
       check_prev_add kernel/locking/lockdep.c:3134 [inline]
       check_prevs_add kernel/locking/lockdep.c:3253 [inline]
       validate_chain kernel/locking/lockdep.c:3869 [inline]
       __lock_acquire+0x2433/0x3b20 kernel/locking/lockdep.c:5137
       lock_acquire kernel/locking/lockdep.c:5754 [inline]
       lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719
       console_lock_spinning_enable kernel/printk/printk.c:1854 [inline]
       console_emit_next_record kernel/printk/printk.c:2895 [inline]
       console_flush_all+0x4af/0xd60 kernel/printk/printk.c:2967
       console_unlock+0x10c/0x260 kernel/printk/printk.c:3036
       vprintk_emit+0x17f/0x5f0 kernel/printk/printk.c:2303
       vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45
       _printk+0xc8/0x100 kernel/printk/printk.c:2328
       fail_dump lib/fault-inject.c:45 [inline]
       should_fail_ex+0x46b/0x5b0 lib/fault-inject.c:153
       strncpy_from_user+0x38/0x300 lib/strncpy_from_user.c:118
       strncpy_from_user_nofault+0x80/0x180 mm/maccess.c:186
       bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:212 [inline]
       ____bpf_probe_read_user_str kernel/trace/bpf_trace.c:221 [inline]
       bpf_probe_read_user_str+0x26/0x70 kernel/trace/bpf_trace.c:218
       bpf_prog_6fb7ada547f278f2+0x3d/0x3f
       bpf_dispatcher_nop_func include/linux/bpf.h:1196 [inline]
       __bpf_prog_run include/linux/filter.h:651 [inline]
       bpf_prog_run include/linux/filter.h:658 [inline]
       __bpf_trace_run kernel/trace/bpf_trace.c:2307 [inline]
       bpf_trace_run4+0x173/0x450 kernel/trace/bpf_trace.c:2348
       __bpf_trace_sched_switch+0x13e/0x180 include/trace/events/sched.h:222
       trace_sched_switch include/trace/events/sched.h:222 [inline]
       __schedule+0x21f3/0x5af0 kernel/sched/core.c:6685
       preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6865
       preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
       vprintk_emit+0x53e/0x5f0 kernel/printk/printk.c:2304
       vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45
       _printk+0xc8/0x100 kernel/printk/printk.c:2328
       validate_nla lib/nlattr.c:410 [inline]
       __nla_validate_parse+0x1856/0x2850 lib/nlattr.c:631
       __nla_parse+0x40/0x50 lib/nlattr.c:728
       nla_parse_nested_deprecated include/net/netlink.h:1288 [inline]
       ip6_tun_build_state+0x104/0x680 net/ipv4/ip_tunnel_core.c:949
       lwtunnel_build_state+0x1d3/0x670 net/core/lwtunnel.c:135
       fib_nh_common_init+0x149/0x2d0 net/ipv4/fib_semantics.c:604
       fib_nh_init+0xbd/0x450 net/ipv4/fib_semantics.c:630
       fib_create_info+0x24fb/0x4d50 net/ipv4/fib_semantics.c:1497
       fib_table_insert+0x1d7/0x1d70 net/ipv4/fib_trie.c:1236
       inet_rtm_newroute+0x11f/0x200 net/ipv4/fib_frontend.c:903
       rtnetlink_rcv_msg+0x3c7/0xe00 net/core/rtnetlink.c:6558
       netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2545
       netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline]
       netlink_unicast+0x53b/0x810 net/netlink/af_netlink.c:1368
       netlink_sendmsg+0x93c/0xe40 net/netlink/af_netlink.c:1910
       sock_sendmsg_nosec net/socket.c:730 [inline]
       __sock_sendmsg+0xd5/0x180 net/socket.c:745
       ____sys_sendmsg+0x6ac/0x940 net/socket.c:2584
       ___sys_sendmsg+0x135/0x1d0 net/socket.c:2638
       __sys_sendmsg+0x117/0x1e0 net/socket.c:2667
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x63/0x6b

other info that might help us debug this:

Chain exists of:
  console_owner --> &p->pi_lock --> &rq->__lock

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&rq->__lock);
                               lock(&p->pi_lock);
                               lock(&rq->__lock);
  lock(console_owner);

 *** DEADLOCK ***

5 locks held by syz-executor.4/5640:
 #0: ffffffff8eaacb68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8eaacb68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe00 net/core/rtnetlink.c:6555
 #1: ffff8880b983c718 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:558
 #2: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
 #2: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
 #2: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2306 [inline]
 #2: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run4+0x107/0x450 kernel/trace/bpf_trace.c:2348
 #3: ffffffff8cf98d60 (console_lock){+.+.}-{0:0}, at: console_trylock_spinning kernel/printk/printk.c:1923 [inline]
 #3: ffffffff8cf98d60 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x162/0x5f0 kernel/printk/printk.c:2302
 #4: ffffffff8cf98dd0 (console_srcu){....}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
 #4: ffffffff8cf98dd0 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:232 [inline]
 #4: ffffffff8cf98dd0 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:286 [inline]
 #4: ffffffff8cf98dd0 (console_srcu){....}-{0:0}, at: console_flush_all+0x12a/0xd60 kernel/printk/printk.c:2959

stack backtrace:
CPU: 0 PID: 5640 Comm: syz-executor.4 Not tainted 6.7.0-rc6-syzkaller-00157-g7c5e046bdcb2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 check_noncircular+0x317/0x400 kernel/locking/lockdep.c:2187
 check_prev_add kernel/locking/lockdep.c:3134 [inline]
 check_prevs_add kernel/locking/lockdep.c:3253 [inline]
 validate_chain kernel/locking/lockdep.c:3869 [inline]
 __lock_acquire+0x2433/0x3b20 kernel/locking/lockdep.c:5137
 lock_acquire kernel/locking/lockdep.c:5754 [inline]
 lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719
 console_lock_spinning_enable kernel/printk/printk.c:1854 [inline]
 console_emit_next_record kernel/printk/printk.c:2895 [inline]
 console_flush_all+0x4af/0xd60 kernel/printk/printk.c:2967
 console_unlock+0x10c/0x260 kernel/printk/printk.c:3036
 vprintk_emit+0x17f/0x5f0 kernel/printk/printk.c:2303
 vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45
 _printk+0xc8/0x100 kernel/printk/printk.c:2328
 fail_dump lib/fault-inject.c:45 [inline]
 should_fail_ex+0x46b/0x5b0 lib/fault-inject.c:153
 strncpy_from_user+0x38/0x300 lib/strncpy_from_user.c:118
 strncpy_from_user_nofault+0x80/0x180 mm/maccess.c:186
 bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:212 [inline]
 ____bpf_probe_read_user_str kernel/trace/bpf_trace.c:221 [inline]
 bpf_probe_read_user_str+0x26/0x70 kernel/trace/bpf_trace.c:218
 bpf_prog_6fb7ada547f278f2+0x3d/0x3f
 bpf_dispatcher_nop_func include/linux/bpf.h:1196 [inline]
 __bpf_prog_run include/linux/filter.h:651 [inline]
 bpf_prog_run include/linux/filter.h:658 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2307 [inline]
 bpf_trace_run4+0x173/0x450 kernel/trace/bpf_trace.c:2348
 __bpf_trace_sched_switch+0x13e/0x180 include/trace/events/sched.h:222
 trace_sched_switch include/trace/events/sched.h:222 [inline]
 __schedule+0x21f3/0x5af0 kernel/sched/core.c:6685
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6865
 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
 vprintk_emit+0x53e/0x5f0 kernel/printk/printk.c:2304
 vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45
 _printk+0xc8/0x100 kernel/printk/printk.c:2328
 validate_nla lib/nlattr.c:410 [inline]
 __nla_validate_parse+0x1856/0x2850 lib/nlattr.c:631
 __nla_parse+0x40/0x50 lib/nlattr.c:728
 nla_parse_nested_deprecated include/net/netlink.h:1288 [inline]
 ip6_tun_build_state+0x104/0x680 net/ipv4/ip_tunnel_core.c:949
 lwtunnel_build_state+0x1d3/0x670 net/core/lwtunnel.c:135
 fib_nh_common_init+0x149/0x2d0 net/ipv4/fib_semantics.c:604
 fib_nh_init+0xbd/0x450 net/ipv4/fib_semantics.c:630
 fib_create_info+0x24fb/0x4d50 net/ipv4/fib_semantics.c:1497
 fib_table_insert+0x1d7/0x1d70 net/ipv4/fib_trie.c:1236
 inet_rtm_newroute+0x11f/0x200 net/ipv4/fib_frontend.c:903
 rtnetlink_rcv_msg+0x3c7/0xe00 net/core/rtnetlink.c:6558
 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2545
 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline]
 netlink_unicast+0x53b/0x810 net/netlink/af_netlink.c:1368
 netlink_sendmsg+0x93c/0xe40 net/netlink/af_netlink.c:1910
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0xd5/0x180 net/socket.c:745
 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2584
 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2638
 __sys_sendmsg+0x117/0x1e0 net/socket.c:2667
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f1858a7cba9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f18597f40c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f1858b9bf80 RCX: 00007f1858a7cba9
RDX: 0000000000000000 RSI: 0000000020000940 RDI: 0000000000000003
RBP: 00007f18597f4120 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 000000000000000b R14: 00007f1858b9bf80 R15: 00007ffc674928b8
 </TASK>
CPU: 0 PID: 5640 Comm: syz-executor.4 Not tainted 6.7.0-rc6-syzkaller-00157-g7c5e046bdcb2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 fail_dump lib/fault-inject.c:52 [inline]
 should_fail_ex+0x496/0x5b0 lib/fault-inject.c:153
 strncpy_from_user+0x38/0x300 lib/strncpy_from_user.c:118
 strncpy_from_user_nofault+0x80/0x180 mm/maccess.c:186
 bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:212 [inline]
 ____bpf_probe_read_user_str kernel/trace/bpf_trace.c:221 [inline]
 bpf_probe_read_user_str+0x26/0x70 kernel/trace/bpf_trace.c:218
 bpf_prog_6fb7ada547f278f2+0x3d/0x3f
 bpf_dispatcher_nop_func include/linux/bpf.h:1196 [inline]
 __bpf_prog_run include/linux/filter.h:651 [inline]
 bpf_prog_run include/linux/filter.h:658 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2307 [inline]
 bpf_trace_run4+0x173/0x450 kernel/trace/bpf_trace.c:2348
 __bpf_trace_sched_switch+0x13e/0x180 include/trace/events/sched.h:222
 trace_sched_switch include/trace/events/sched.h:222 [inline]
 __schedule+0x21f3/0x5af0 kernel/sched/core.c:6685
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6865
 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
 vprintk_emit+0x53e/0x5f0 kernel/printk/printk.c:2304
 vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45
 _printk+0xc8/0x100 kernel/printk/printk.c:2328
 validate_nla lib/nlattr.c:410 [inline]
 __nla_validate_parse+0x1856/0x2850 lib/nlattr.c:631
 __nla_parse+0x40/0x50 lib/nlattr.c:728
 nla_parse_nested_deprecated include/net/netlink.h:1288 [inline]
 ip6_tun_build_state+0x104/0x680 net/ipv4/ip_tunnel_core.c:949
 lwtunnel_build_state+0x1d3/0x670 net/core/lwtunnel.c:135
 fib_nh_common_init+0x149/0x2d0 net/ipv4/fib_semantics.c:604
 fib_nh_init+0xbd/0x450 net/ipv4/fib_semantics.c:630
 fib_create_info+0x24fb/0x4d50 net/ipv4/fib_semantics.c:1497
 fib_table_insert+0x1d7/0x1d70 net/ipv4/fib_trie.c:1236
 inet_rtm_newroute+0x11f/0x200 net/ipv4/fib_frontend.c:903
 rtnetlink_rcv_msg+0x3c7/0xe00 net/core/rtnetlink.c:6558
 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2545
 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline]
 netlink_unicast+0x53b/0x810 net/netlink/af_netlink.c:1368
 netlink_sendmsg+0x93c/0xe40 net/netlink/af_netlink.c:1910
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0xd5/0x180 net/socket.c:745
 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2584
 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2638
 __sys_sendmsg+0x117/0x1e0 net/socket.c:2667
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f1858a7cba9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f18597f40c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f1858b9bf80 RCX: 00007f1858a7cba9
RDX: 0000000000000000 RSI: 0000000020000940 RDI: 0000000000000003
RBP: 00007f18597f4120 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 000000000000000b R14: 00007f1858b9bf80 R15: 00007ffc674928b8
 </TASK>