rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (5 ticks this GP) idle=3bb/1/0x4000000000000000 softirq=14125/14125 fqs=1956 
	(detected by 1, t=10503 jiffies, g=17301, q=2970)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5935 Comm: syz.5.372 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:rcu_read_lock include/linux/rcupdate.h:740 [inline]
RIP: 0010:__perf_event_output kernel/events/core.c:7800 [inline]
RIP: 0010:perf_event_output_forward+0xb0/0x2e0 kernel/events/core.c:7822
Code: f3 f3 f3 e8 e2 21 e1 ff 43 c7 44 35 04 00 00 00 00 66 43 c7 44 35 08 00 00 43 c6 44 35 0a 00 43 c6 44 35 10 00 e8 d0 7c cd ff <48> c7 c7 a0 ea 31 8c e8 b4 58 02 00 e8 1f 6f 24 08 41 89 c4 31 ff
RSP: 0018:ffffc90000006f40 EFLAGS: 00000083
RAX: 0000000000000001 RBX: ffff88807cc1e578 RCX: dffffc0000000000
RDX: 0000000000000100 RSI: ffffc90000007140 RDI: ffff88807cc1e578
RBP: ffffc90000007050 R08: ffff88807cc1e9eb R09: 1ffff1100f983d3d
R10: dffffc0000000000 R11: ffffed100f983d3e R12: dffffc0000000000
R13: 1ffff92000000dec R14: dffffc0000000000 R15: ffffc90000007140
FS:  00007f72474dc6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e119ff8 CR3: 0000000021214000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __perf_event_overflow+0x364/0x530 kernel/events/core.c:9515
 perf_tp_event+0x383/0xbf0 kernel/events/core.c:10047
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10021
 perf_trace_preemptirq_template+0x2aa/0x360 include/trace/events/preemptirq.h:14
 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+0x7f/0x4a0 kernel/rcu/tree_plugin.h:674
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 12 f2 9c 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc90000007560 EFLAGS: 00000206
RAX: 522513cee0af6f00 RBX: 1ffff92000000eb0 RCX: 522513cee0af6f00
RDX: dffffc0000000000 RSI: ffffffff8a2b2780 RDI: ffffffff8a79f980
RBP: ffffc90000007630 R08: ffffffff901d4167 R09: 1ffffffff203a82c
R10: dffffc0000000000 R11: fffffbfff203a82d R12: ffffffff8c322f00
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422
 rcu_read_unlock include/linux/rcupdate.h:772 [inline]
 ip_output+0x348/0x3e0 net/ipv4/ip_output.c:438
 dst_output include/net/dst.h:452 [inline]
 ip_local_out net/ipv4/ip_output.c:126 [inline]
 ip_send_skb+0x129/0x1c0 net/ipv4/ip_output.c:1588
 __icmp_send+0xcea/0x10f0 net/ipv4/icmp.c:777
 ipv4_send_dest_unreach net/ipv4/route.c:1270 [inline]
 ipv4_link_failure+0x5e0/0x980 net/ipv4/route.c:1277
 dst_link_failure include/net/dst.h:422 [inline]
 arp_error_report+0x10e/0x150 net/ipv4/arp.c:295
 neigh_invalidate+0x22c/0x440 net/core/neighbour.c:1001
 neigh_timer_handler+0x910/0xfe0 net/core/neighbour.c:1088
 call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648
 expire_timers kernel/time/timer.c:1699 [inline]
 __run_timers+0x53e/0x800 kernel/time/timer.c:1970
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983
 handle_softirqs+0x339/0x830 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 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:native_save_fl arch/x86/include/asm/irqflags.h:36 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:___might_sleep+0x181/0x610 kernel/sched/core.c:9626
Code: 7c 24 2c 75 70 42 c6 44 23 0c 00 48 c7 84 24 a0 00 00 00 00 00 00 00 9c 8f 84 24 a0 00 00 00 f7 84 24 a0 00 00 00 00 02 00 00 <42> c6 44 23 0c f8 74 43 4c 8d 7a 2c 4c 89 f8 48 c1 e8 03 42 0f b6
RSP: 0018:ffffc90002f9f640 EFLAGS: 00000206
RAX: 0000000000000000 RBX: 1ffff920005f3ed0 RCX: 522513cee0af6f00
RDX: ffff88802a33bb80 RSI: ffffffff8a2b3a20 RDI: ffffffff8a79f980
RBP: ffffc90002f9f750 R08: ffffffff8d89e36f R09: 1ffffffff1b13c6d
R10: dffffc0000000000 R11: fffffbfff1b13c6e R12: dffffc0000000000
R13: ffff88802a33bfbc R14: 1ffff110054677f7 R15: 0000000000000000
 inet_twsk_purge+0x10a/0x840 net/ipv4/inet_timewait_sock.c:267
 ops_exit_list net/core/net_namespace.c:177 [inline]
 setup_net+0x844/0xa10 net/core/net_namespace.c:365
 copy_net_ns+0x348/0x5b0 net/core/net_namespace.c:503
 create_new_namespaces+0x3d3/0x6f0 kernel/nsproxy.c:110
 copy_namespaces+0x37d/0x3e0 kernel/nsproxy.c:178
 copy_process+0x1834/0x3e20 kernel/fork.c:2293
 kernel_clone+0x23f/0x990 kernel/fork.c:2679
 __do_sys_clone kernel/fork.c:2796 [inline]
 __se_sys_clone kernel/fork.c:2780 [inline]
 __x64_sys_clone+0x19a/0x210 kernel/fork.c:2780
 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: 0033:0x7f72492a3819
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:00007f72474dbfd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f724951d090 RCX: 00007f72492a3819
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000630c0600
RBP: 00007f7249339c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f724951d128 R14: 00007f724951d090 R15: 00007fffdffc51c8
 </TASK>