rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-....: (1 GPs behind) idle=b27/1/0x4000000000000002 softirq=9113/9116 fqs=5244 (detected by 1, t=10502 jiffies, g=11769, q=1573) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5064 Comm: syz.1.187 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:perf_trace_preemptirq_template+0x189/0x380 include/trace/events/preemptirq.h:14 Code: 80 00 00 00 c7 84 24 80 00 00 00 00 00 00 00 bf 14 00 00 00 e8 88 ae 01 00 48 85 c0 0f 84 43 01 00 00 49 89 c6 4c 89 7c 24 28 e2 e5 f9 ff 4c 8b 6c 24 60 48 89 d9 48 8b 5d 08 49 8d bd 80 00 RSP: 0018:ffffc90000007680 EFLAGS: 00000082 RAX: ffffe8ffffcc9310 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000008 RBP: ffffc90000007768 R08: dffffc0000000000 R09: ffffed101720765a R10: ffffed101720765a R11: 1ffff11017207659 R12: ffffffff8c167180 R13: ffffe8ffffc3ff88 R14: ffffe8ffffcc9310 R15: ffffffff8c167100 FS: 00007fcdcb3ec6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2d7e9ff368 CR3: 000000007a797000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: trace_irq_enable_rcuidle+0x108/0x180 include/trace/events/preemptirq.h:40 trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713 RIP: 0010:rcu_read_unlock_special+0x84/0x480 kernel/rcu/tree_plugin.h:674 Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 dd 13 9e 7e 41 f7 c6 00 00 f0 00 74 45 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b RSP: 0018:ffffc90000007860 EFLAGS: 00000206 RAX: e5684067a690e300 RBX: 1ffff92000000f10 RCX: e5684067a690e300 RDX: dffffc0000000000 RSI: ffffffff8a0b1620 RDI: ffffffff8a59a240 RBP: ffffc90000007940 R08: dffffc0000000000 R09: fffffbfff1ff7639 R10: fffffbfff1ff7639 R11: 1ffffffff1ff7638 R12: ffffffff8c120900 R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422 rcu_read_unlock include/linux/rcupdate.h:771 [inline] ndisc_send_skb+0xdc4/0x14a0 net/ipv6/ndisc.c:521 addrconf_rs_timer+0x2b8/0x600 net/ipv6/addrconf.c:3956 call_timer_fn+0x16c/0x530 kernel/time/timer.c:1451 expire_timers kernel/time/timer.c:1496 [inline] __run_timers+0x525/0x7c0 kernel/time/timer.c:1767 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780 handle_softirqs+0x328/0x820 kernel/softirq.c:576 do_softirq+0x13b/0x200 kernel/softirq.c:477 __local_bh_enable_ip+0x174/0x1b0 kernel/softirq.c:401 spin_unlock_bh include/linux/spinlock.h:408 [inline] tipc_nametbl_publish+0x11f/0x1e0 net/tipc/name_table.c:783 tipc_sk_publish+0x1be/0x440 net/tipc/socket.c:2916 tipc_sk_join+0x39b/0x6b0 net/tipc/socket.c:3094 tipc_setsockopt+0x684/0x900 net/tipc/socket.c:3201 __sys_setsockopt+0x2bf/0x3d0 net/socket.c:2203 __do_sys_setsockopt net/socket.c:2214 [inline] __se_sys_setsockopt net/socket.c:2211 [inline] __x64_sys_setsockopt+0xb1/0xc0 net/socket.c:2211 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: 0033:0x7fcdcd184be9 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fcdcb3ec038 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007fcdcd3bbfa0 RCX: 00007fcdcd184be9 RDX: 0000000000000087 RSI: 000000000000010f RDI: 0000000000000007 RBP: 00007fcdcd207e19 R08: 0000000000000043 R09: 0000000000000000 R10: 00002000000008c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fcdcd3bc038 R14: 00007fcdcd3bbfa0 R15: 00007ffc2443dd68