syzbot

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (1 GPs behind) idle=69d/1/0x4000000000000002 softirq=12277/12278 fqs=2104 
	(detected by 1, t=10504 jiffies, g=15133, q=3386)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 6045 Comm: syz.3.479 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:__perf_event_overflow+0x13/0x550 kernel/events/core.c:9463
Code: 00 00 4c 89 f2 48 89 d9 5b 41 5e 41 5f eb 08 0f 1f 84 00 00 00 00 00 55 41 57 41 56 41 55 41 54 53 48 83 ec 20 48 89 4c 24 10 <48> 89 54 24 08 41 89 f7 48 89 fb 49 bc 00 00 00 00 00 fc ff df e8
RSP: 0018:ffffc90000007268 EFLAGS: 00000082
RAX: ffffffff8198621c RBX: ffff8880b9035250 RCX: ffff8880b90351c8
RDX: ffffc90000007340 RSI: 0000000000000000 RDI: ffff8880251a7168
RBP: ffffc90000007548 R08: ffff888023640007 R09: 1ffff110046c8000
R10: dffffc0000000000 R11: ffffed10046c8001 R12: 1ffff11017206a4a
R13: ffff8880251a7168 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f13d3a9c6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ef17ff8 CR3: 00000000256b5000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 perf_tp_event+0x324/0xbe0 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 c2 22 9d 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:ffffc90000007780 EFLAGS: 00000206
RAX: 2d29b919cc3dd100 RBX: 1ffff92000000ef4 RCX: 2d29b919cc3dd100
RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: ffffffff8a79c980
RBP: ffffc90000007860 R08: ffffffff901cb1c7 R09: 1ffffffff2039638
R10: dffffc0000000000 R11: fffffbfff2039639 R12: ffffffff8c323400
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]
 ndisc_send_skb+0xd39/0x1410 net/ipv6/ndisc.c:521
 addrconf_rs_timer+0x367/0x640 net/ipv6/addrconf.c:3959
 call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648
 expire_timers kernel/time/timer.c:1699 [inline]
 __run_timers+0x56c/0x810 kernel/time/timer.c:1970
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983
 handle_softirqs+0x336/0x830 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:finish_lock_switch+0x12f/0x290 kernel/sched/core.c:4804
Code: 83 c7 18 be ff ff ff ff e8 fe 8c 65 08 85 c0 74 46 4d 85 ff 75 62 0f 1f 44 00 00 48 89 df e8 28 f7 6e 08 e8 83 ce 2a 00 fb 5b <41> 5c 41 5d 41 5e 41 5f 5d c3 48 89 df e8 2f 0e fe ff 43 80 3c 2c
RSP: 0018:ffffc900012af558 EFLAGS: 00000282
RAX: 2d29b919cc3dd100 RBX: ffff8880796e8000 RCX: 2d29b919cc3dd100
RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: ffffffff8a79c980
RBP: 1ffff11017207613 R08: ffff8880b903b30b R09: 1ffff11017207661
R10: dffffc0000000000 R11: ffffed1017207662 R12: 1ffff110172075c1
R13: dffffc0000000000 R14: ffff8880b903ae08 R15: 0000000000000000
 finish_task_switch+0x12f/0x650 kernel/sched/core.c:4921
 context_switch kernel/sched/core.c:5052 [inline]
 __schedule+0x11cb/0x4350 kernel/sched/core.c:6395
 preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6799
 irqentry_exit+0x63/0x70 kernel/entry/common.c:432
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:core_kernel_text kernel/extable.c:104 [inline]
RIP: 0010:kernel_text_address kernel/extable.c:125 [inline]
RIP: 0010:__kernel_text_address+0x0/0x100 kernel/extable.c:105
Code: 00 00 eb b1 66 0f 1f 44 00 00 48 81 ff 00 00 00 8c 0f 93 c0 48 81 ff 00 ec 8b 8d 0f 92 c1 20 c1 0f b6 c1 c3 66 0f 1f 44 00 00 <55> 41 57 41 56 53 48 81 ff 00 00 00 81 0f 93 c0 48 81 ff cc 7d 00
RSP: 0018:ffffc900012af920 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc900012af990 RCX: dffffc0000000000
RDX: ffffc900012af9d8 RSI: ffffc900012af9d0 RDI: ffffffff81676ad6
RBP: ffffc900012af9d0 R08: ffffc900012af9d0 R09: ffffc900012af998
R10: dffffc0000000000 R11: fffff52000255f35 R12: ffff888023640000
R13: ffff888016de9140 R14: dffffc0000000000 R15: 1ffff92000255f32
 unwind_get_return_address+0x49/0x80 arch/x86/kernel/unwind_orc.c:323
 arch_stack_walk+0xf2/0x140 arch/x86/kernel/stacktrace.c:26
 stack_trace_save+0xa6/0xf0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:434 [inline]
 __kasan_slab_alloc+0x92/0xc0 mm/kasan/common.c:467
 kasan_slab_alloc include/linux/kasan.h:254 [inline]
 slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519
 slab_alloc_node mm/slub.c:3225 [inline]
 slab_alloc mm/slub.c:3233 [inline]
 kmem_cache_alloc+0x15d/0x280 mm/slub.c:3238
 kmem_cache_zalloc include/linux/slab.h:728 [inline]
 lsm_inode_alloc security/security.c:596 [inline]
 security_inode_alloc+0x30/0x110 security/security.c:1034
 inode_init_always+0x8e5/0xc90 fs/inode.c:232
 alloc_inode fs/inode.c:268 [inline]
 new_inode_pseudo+0x8e/0x210 fs/inode.c:1001
 sock_alloc net/socket.c:628 [inline]
 __sock_create+0x128/0x910 net/socket.c:1460
 sock_create net/socket.c:1552 [inline]
 __sys_socketpair+0x1bd/0x540 net/socket.c:1652
 __do_sys_socketpair net/socket.c:1705 [inline]
 __se_sys_socketpair net/socket.c:1702 [inline]
 __x64_sys_socketpair+0x97/0xb0 net/socket.c:1702
 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: 0033:0x7f13d5842e59
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:00007f13d3a9c028 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007f13d5abbfa0 RCX: 00007f13d5842e59
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 00007f13d58d8e6f R08: 0000000000000000 R09: 0000000000000000
R10: 00002000000000c0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f13d5abc038 R14: 00007f13d5abbfa0 R15: 00007ffff283dd88
 </TASK>