rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2666 jiffies s: 135009 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 9330 Comm: syz.0.11471 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:idle_cpu+0x4/0x110 kernel/sched/core.c:7193
Code: e8 01 a7 df 02 e9 63 fc ff ff 44 89 ff 31 f6 e8 62 dc 09 00 84 c0 b8 ff ff ff ff 0f 85 fc fa ff ff e9 b9 fb ff ff 41 57 41 56 <41> 54 53 48 63 df 83 fb 08 0f 83 b8 00 00 00 49 bf 00 00 00 00 00
RSP: 0018:ffffc900001e0908 EFLAGS: 00000082
RAX: 0000000000000001 RBX: ffff88802e1e1dc0 RCX: 3b55c8d40baa2300
RDX: 1ffffffff1f41208 RSI: ffffffff8adf0d00 RDI: 0000000000000001
RBP: ffffc900001e09a8 R08: ffffffff8fa09048 R09: ffffffff8fa09058
R10: ffffffff8fa09050 R11: ffffffff8fa09043 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 1ffff9200003c124
FS:  00007f747ba716c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7d0fe708c0 CR3: 000000006045e000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 tick_irq_exit kernel/softirq.c:662 [inline]
 __irq_exit_rcu+0x147/0x230 kernel/softirq.c:681
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
 sysvec_irq_work+0x4f/0xc0 arch/x86/kernel/irq_work.c:17
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728
RIP: 0010:rcu_read_unlock_special+0x7f/0x510 kernel/rcu/tree_plugin.h:685
Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 92 31 95 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc900001e0a80 EFLAGS: 00000206
RAX: 3b55c8d40baa2300 RBX: 1ffff9200003c158 RCX: 3b55c8d40baa2300
RDX: dffffc0000000000 RSI: ffffffff8a8c1220 RDI: ffffffff8adf0d20
RBP: ffffc900001e0b80 R08: ffffffff90af435f R09: 1ffffffff215e86b
R10: dffffc0000000000 R11: fffffbfff215e86c R12: 0000000000000246
R13: dffffc0000000000 R14: ffff8880b8f3b900 R15: 0000000000000002
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 process_backlog+0x410/0x6f0 net/core/dev.c:6037
 __napi_poll+0xc0/0x460 net/core/dev.c:6603
 napi_poll net/core/dev.c:6670 [inline]
 net_rx_action+0x5dd/0xb20 net/core/dev.c:6784
 handle_softirqs+0x2a1/0x930 kernel/softirq.c:596
 do_softirq+0x142/0x210 kernel/softirq.c:497
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x180/0x1c0 kernel/softirq.c:421
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 netif_rx+0x7f/0x90 net/core/dev.c:5115
 tipc_clone_to_loopback+0x3b8/0x4a0 net/tipc/bearer.c:789
 tipc_loopback_trace net/tipc/bearer.h:256 [inline]
 tipc_node_xmit+0xd8b/0xf70 net/tipc/node.c:1701
 tipc_node_xmit_skb+0x11b/0x190 net/tipc/node.c:1768
 __tipc_shutdown+0xd0e/0x1530 net/tipc/socket.c:598
 tipc_release+0x317/0x2270 net/tipc/socket.c:642
 __sock_release net/socket.c:654 [inline]
 sock_close+0xd5/0x240 net/socket.c:1399
 __fput+0x22c/0x920 fs/file_table.c:320
 task_work_run+0x1d0/0x260 kernel/task_work.c:203
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f747ab9aeb9
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:00007f747ba71028 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 00007f747ae15fa0 RCX: 00007f747ab9aeb9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007f747ac08c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f747ae16038 R14: 00007f747ae15fa0 R15: 00007fff4d8951a8
 </TASK>