rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=a1f/1/0x4000000000000000 softirq=93979/93980 fqs=5247 
	(t=10502 jiffies g=128877 q=1860)
NMI backtrace for cpu 1
CPU: 1 PID: 30013 Comm: syz.9.7291 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <IRQ>
 dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x3a2/0x3d0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
 rcu_dump_cpu_stacks+0x22d/0x380 kernel/rcu/tree_stall.h:349
 print_cpu_stall+0x31f/0x5f0 kernel/rcu/tree_stall.h:633
 check_cpu_stall kernel/rcu/tree_stall.h:727 [inline]
 rcu_pending kernel/rcu/tree.c:3936 [inline]
 rcu_sched_clock_irq+0x6ec/0x1120 kernel/rcu/tree.c:2619
 update_process_times+0x193/0x200 kernel/time/timer.c:2021
 tick_sched_handle kernel/time/tick-sched.c:254 [inline]
 tick_sched_timer+0x37d/0x560 kernel/time/tick-sched.c:1473
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x4b0/0xb60 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x397/0x8b0 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x137/0x4a0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:pv_queued_spin_unlock arch/x86/include/asm/paravirt.h:590 [inline]
RIP: 0010:queued_spin_unlock arch/x86/include/asm/qspinlock.h:56 [inline]
RIP: 0010:do_raw_spin_unlock+0xf9/0x230 kernel/locking/spinlock_debug.c:141
Code: 06 ff ff ff ff 42 0f b6 44 25 00 84 c0 0f 85 25 01 00 00 41 c7 07 ff ff ff ff 48 c7 c0 98 30 19 8c 48 c1 e8 03 42 80 3c 20 00 <74> 0c 48 c7 c7 98 30 19 8c e8 49 f4 5f 00 48 83 3d 19 ed ba 0a 00
RSP: 0018:ffffc9000317e490 EFLAGS: 00000246
RAX: 1ffffffff1832613 RBX: ffffc9000317ea38 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffc9000317ea38
RBP: 1ffff9200062fd48 R08: ffffc9000317ea3b R09: 1ffff9200062fd47
R10: dffffc0000000000 R11: fffff5200062fd48 R12: dffffc0000000000
R13: 1ffff9200062fd49 R14: ffffc9000317ea48 R15: ffffc9000317ea40
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:175 [inline]
 _raw_spin_unlock_bh+0x1f/0x30 kernel/locking/spinlock.c:210
 spin_unlock_bh include/linux/spinlock.h:409 [inline]
 tipc_skb_peek_port net/tipc/msg.h:1258 [inline]
 tipc_sk_rcv+0x37e/0x2a10 net/tipc/socket.c:2497
 tipc_node_xmit+0x203/0xf70 net/tipc/node.c:1708
 tipc_node_xmit_skb net/tipc/node.c:1773 [inline]
 tipc_node_distr_xmit+0x2c7/0x3f0 net/tipc/node.c:1788
 tipc_sk_rcv+0x24ac/0x2a10 net/tipc/socket.c:2507
 tipc_node_xmit+0x203/0xf70 net/tipc/node.c:1708
 tipc_sk_push_backlog+0x4f1/0x920 net/tipc/socket.c:1317
 tipc_sk_conn_proto_rcv net/tipc/socket.c:1374 [inline]
 tipc_sk_proto_rcv+0xaad/0x1770 net/tipc/socket.c:2162
 tipc_sk_filter_rcv+0x2e91/0x30b0 net/tipc/socket.c:2358
 tipc_sk_enqueue net/tipc/socket.c:2451 [inline]
 tipc_sk_rcv+0x846/0x2a10 net/tipc/socket.c:2503
 tipc_node_xmit+0x203/0xf70 net/tipc/node.c:1708
 tipc_node_xmit_skb net/tipc/node.c:1773 [inline]
 tipc_node_distr_xmit+0x2c7/0x3f0 net/tipc/node.c:1788
 tipc_sk_backlog_rcv+0x1aa/0x260 net/tipc/socket.c:2418
 sk_backlog_rcv include/net/sock.h:1080 [inline]
 __release_sock+0x1e6/0x460 net/core/sock.c:2730
 release_sock+0x5b/0x1b0 net/core/sock.c:3273
 sock_setsockopt+0x1ba3/0x2480 net/core/sock.c:1378
 __sys_setsockopt+0x2f6/0x3d0 net/socket.c:2209
 __do_sys_setsockopt net/socket.c:2224 [inline]
 __se_sys_setsockopt net/socket.c:2221 [inline]
 __x64_sys_setsockopt+0xb1/0xc0 net/socket.c:2221
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fe86a75a159
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:00007fe868991028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007fe86a9e2090 RCX: 00007fe86a75a159
RDX: 0000000000000021 RSI: 0000000000000001 RDI: 000000000000000b
RBP: 00007fe86a7f1024 R08: 0000000000000004 R09: 0000000000000000
R10: 0000200000000040 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe86a9e2128 R14: 00007fe86a9e2090 R15: 00007fff43738a58
 </TASK>