rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2648 jiffies s: 25993 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 10024 Comm: syz.0.1753 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:perf_swevent_event+0x237/0x530 kernel/events/core.c:9604
Code: e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 39 41 2d 00 48 8b 1b bf 01 00 00 00 48 89 de e8 09 16 dd ff <48> 83 fb 01 0f 85 c0 00 00 00 48 8b 04 24 48 8d 98 00 01 00 00 48
RSP: 0018:ffffc90000007268 EFLAGS: 00000046
RAX: ffffffff81a3c437 RBX: 0000000000000001 RCX: ffff888058d8bb80
RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffff8880b8e35518 R08: dffffc0000000000 R09: ffffed100b1b1771
R10: ffffed100b1b1771 R11: 1ffff1100b1b1770 R12: 0000000000000001
R13: ffff88804f3de7f0 R14: 1ffff11009e7bcfe R15: 0000000000000001
FS:  00007f0f84b586c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055558137f808 CR3: 000000007fdbb000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 perf_tp_event+0x335/0xb60 kernel/events/core.c:10029
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10002
 perf_trace_preemptirq_template+0x287/0x330 include/trace/events/preemptirq.h:14
 trace_irq_enable_rcuidle+0xd3/0x140 include/trace/events/preemptirq.h:40
 trace_hardirqs_on+0x24/0x40 kernel/trace/trace_preemptirq.c:44
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728
RIP: 0010:rcu_read_unlock_special+0x84/0x500 kernel/rcu/tree_plugin.h:685
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 ed 90 96 7e 41 f7 c6 00 00 f0 00 74 45 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b
RSP: 0018:ffffc90000007760 EFLAGS: 00000206
RAX: 6df48b5a95e60c00 RBX: 1ffff92000000ef4 RCX: 6df48b5a95e60c00
RDX: dffffc0000000000 RSI: ffffffff8a8c0580 RDI: ffffffff8adef760
RBP: ffffc90000007860 R08: dffffc0000000000 R09: fffffbfff215c467
R10: fffffbfff215c467 R11: 1ffffffff215c466 R12: 0000000000000246
R13: dffffc0000000000 R14: ffff8880b8e3b900 R15: 0000000000000001
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 ndisc_send_skb+0xda7/0x1510 net/ipv6/ndisc.c:521
 addrconf_rs_timer+0x2b8/0x600 net/ipv6/addrconf.c:3979
 call_timer_fn+0x1a0/0x670 kernel/time/timer.c:1700
 expire_timers kernel/time/timer.c:1751 [inline]
 __run_timers+0x529/0x7d0 kernel/time/timer.c:2022
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2035
 handle_softirqs+0x2a1/0x920 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:679
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:kasan_quarantine_put+0x84/0x220 mm/kasan/quarantine.c:245
Code: e8 b1 24 b6 ff 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 0f 85 83 00 00 00 41 f7 c7 00 02 00 00 74 01 fb 31 c0 <48> 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f c3 48 8d 80 c0 66 03 00 45
RSP: 0018:ffffc90003dd71d8 EFLAGS: 00000206
RAX: 6df48b5a95e60c01 RBX: ffff888058a0f1d0 RCX: 6df48b5a95e60c00
RDX: dffffc0000000000 RSI: ffffffff8a8c0580 RDI: ffffffff8adef760
RBP: ffff888058a0f1d0 R08: dffffc0000000000 R09: fffffbfff215c44a
R10: fffffbfff215c44a R11: 1ffffffff215c449 R12: 0000000000000000
R13: ffffc90003dd7270 R14: 000000000007ac38 R15: 0000000000000282
 kasan_slab_free include/linux/kasan.h:177 [inline]
 slab_free_hook mm/slub.c:1729 [inline]
 slab_free_freelist_hook+0x131/0x1a0 mm/slub.c:1755
 slab_free mm/slub.c:3687 [inline]
 kmem_cache_free+0xf7/0x290 mm/slub.c:3709
 kernfs_put+0x319/0x490 fs/kernfs/dir.c:568
 kernfs_remove_by_name_ns+0xe0/0x150 fs/kernfs/dir.c:1668
 kernfs_remove_by_name include/linux/kernfs.h:622 [inline]
 remove_files fs/sysfs/group.c:28 [inline]
 sysfs_remove_group+0xf8/0x290 fs/sysfs/group.c:288
 sysfs_remove_groups+0x50/0xa0 fs/sysfs/group.c:312
 device_remove_groups drivers/base/core.c:2759 [inline]
 device_remove_attrs+0x205/0x250 drivers/base/core.c:2979
 device_del+0x620/0xa70 drivers/base/core.c:3884
 unregister_netdevice_many+0x1393/0x1840 net/core/dev.c:11017
 default_device_exit_batch+0x9c3/0xa50 net/core/dev.c:11503
 ops_exit_list net/core/net_namespace.c:177 [inline]
 setup_net+0x972/0xbb0 net/core/net_namespace.c:368
 copy_net_ns+0x348/0x5b0 net/core/net_namespace.c:508
 create_new_namespaces+0x3d3/0x6f0 kernel/nsproxy.c:110
 copy_namespaces+0x3b0/0x410 kernel/nsproxy.c:178
 copy_process+0x199c/0x4020 kernel/fork.c:2354
 kernel_clone+0x225/0x8b0 kernel/fork.c:2757
 __do_sys_clone kernel/fork.c:2898 [inline]
 __se_sys_clone kernel/fork.c:2882 [inline]
 __x64_sys_clone+0x17c/0x1d0 kernel/fork.c:2882
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f0f83d8f6c9
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:00007f0f84b57fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f0f83fe5fa0 RCX: 00007f0f83d8f6c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000042000000
RBP: 00007f0f83e11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f0f83fe6038 R14: 00007f0f83fe5fa0 R15: 00007ffe09f80f88
 </TASK>