rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10498 ticks this GP) idle=9dac/1/0x4000000000000000 softirq=22852/22853 fqs=5144
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   538488        154            0
rcu: 	cputime:     6724      45752          755   ==> 52490(ms)
rcu: 	(t=10501 jiffies g=26081 q=1668 ncpus=2)
CPU: 0 PID: 8193 Comm: syz.0.516 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:55 [inline]
RIP: 0010:stack_access_ok arch/x86/kernel/unwind_orc.c:393 [inline]
RIP: 0010:deref_stack_reg+0x39/0x230 arch/x86/kernel/unwind_orc.c:403
Code: 89 54 24 10 48 89 34 24 49 89 ff 48 bd 00 00 00 00 00 fc ff df e8 07 ab 4b 00 49 8d 7f 08 48 89 f8 48 c1 e8 03 48 89 44 24 08 <80> 3c 28 00 74 05 e8 0c 37 a4 00 4d 8b 77 08 49 8d 7f 10 49 89 fd
RSP: 0018:ffffc90000007448 EFLAGS: 00000a02
RAX: 1ffff92000000eae RBX: ffffffff8f8d1a47 RCX: ffff888027500000
RDX: 0000000000000100 RSI: ffffc90000007820 RDI: ffffc90000007570
RBP: dffffc0000000000 R08: ffff888027500000 R09: 0000000000000003
R10: 0000000000000004 R11: 0000000000000100 R12: ffffc900000077f0
R13: ffffc90000007568 R14: ffffffff8f8d1a46 R15: ffffc90000007568
FS:  00007f1f63eae6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6eeb711d58 CR3: 000000002cd53000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000200000000300
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 unwind_next_frame+0x1781/0x2990 arch/x86/kernel/unwind_orc.c:648
 arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
 ref_tracker_alloc+0x1b8/0x4b0 lib/ref_tracker.c:209
 __netdev_tracker_alloc include/linux/netdevice.h:4159 [inline]
 netdev_hold include/linux/netdevice.h:4188 [inline]
 dst_init+0xc0/0x470 net/core/dst.c:52
 dst_alloc+0x12e/0x170 net/core/dst.c:94
 ip6_dst_alloc net/ipv6/route.c:344 [inline]
 icmp6_dst_alloc+0x7c/0x400 net/ipv6/route.c:3320
 ndisc_send_skb+0x422/0x1480 net/ipv6/ndisc.c:493
 addrconf_rs_timer+0x36b/0x640 net/ipv6/addrconf.c:4036
 call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x570/0x810 kernel/time/timer.c:2023
 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x27d/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:finish_task_switch+0x267/0x8f0 kernel/sched/core.c:5256
Code: 33 09 85 c0 0f 84 30 01 00 00 48 85 db 0f 85 4f 01 00 00 0f 1f 44 00 00 4c 89 e7 e8 53 28 3d 09 e8 0e 23 30 00 fb 4c 8b 65 b8 <49> 8d bc 24 00 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0
RSP: 0018:ffffc90003696c60 EFLAGS: 00000286
RAX: 95df3ffdba455200 RBX: 0000000000000000 RCX: 95df3ffdba455200
RDX: dffffc0000000000 RSI: ffffffff8acacce0 RDI: ffffffff8b1d3ba0
RBP: ffffc90003696cb0 R08: ffffffff911eb58f R09: 1ffffffff223d6b1
R10: dffffc0000000000 R11: fffffbfff223d6b2 R12: ffff888027500000
R13: 1ffff110171c79a1 R14: dffffc0000000000 R15: ffff8880b8e3cd08
 context_switch kernel/sched/core.c:5385 [inline]
 __schedule+0x15b6/0x4660 kernel/sched/core.c:6701
 preempt_schedule_common+0x82/0xc0 kernel/sched/core.c:6868
 preempt_schedule+0xc0/0xd0 kernel/sched/core.c:6892
 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
 __raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
 _raw_spin_unlock+0x3a/0x40 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:391 [inline]
 mptcp_diag_dump_listeners net/mptcp/mptcp_diag.c:141 [inline]
 mptcp_diag_dump+0xf46/0x1330 net/mptcp/mptcp_diag.c:197
 __inet_diag_dump+0x1f6/0x380 net/ipv4/inet_diag.c:1179
 inet_diag_dump_compat+0x182/0x230 net/ipv4/inet_diag.c:1288
 netlink_dump+0x738/0xec0 net/netlink/af_netlink.c:2269
 __netlink_dump_start+0x57c/0x7a0 net/netlink/af_netlink.c:2377
 netlink_dump_start include/linux/netlink.h:338 [inline]
 inet_diag_rcv_msg_compat+0x215/0x440 net/ipv4/inet_diag.c:1323
 sock_diag_rcv_msg+0x3d3/0x5f0 net/core/sock_diag.c:-1
 netlink_rcv_skb+0x235/0x4c0 net/netlink/af_netlink.c:2550
 sock_diag_rcv+0x2a/0x40 net/core/sock_diag.c:298
 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
 netlink_unicast+0x7b1/0x930 net/netlink/af_netlink.c:1346
 netlink_sendmsg+0x8d0/0xbf0 net/netlink/af_netlink.c:1899
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 ____sys_sendmsg+0x61b/0x980 net/socket.c:2595
 ___sys_sendmsg+0x2a6/0x360 net/socket.c:2649
 __sys_sendmsg net/socket.c:2678 [inline]
 __do_sys_sendmsg net/socket.c:2687 [inline]
 __se_sys_sendmsg+0x1d0/0x2c0 net/socket.c:2685
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1f62f9e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1f63eae028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f1f63225fa0 RCX: 00007f1f62f9e159
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 000000000000004f
RBP: 00007f1f6303506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1f63226038 R14: 00007f1f63225fa0 R15: 00007ffd04caa248
 </TASK>