rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10499 ticks this GP) idle=d0a4/1/0x4000000000000000 softirq=89544/89544 fqs=4383
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1327378          0            0
rcu: 	cputime:    19374      33095           70   ==> 52470(ms)
rcu: 	(t=10500 jiffies g=121249 q=1031 ncpus=2)
CPU: 1 PID: 21876 Comm: syz.2.5314 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:might_alloc include/linux/sched/mm.h:303 [inline]
RIP: 0010:slab_pre_alloc_hook+0x23/0x300 mm/slab.h:714
Code: ff ff ff 0f 1f 40 00 55 41 57 41 56 41 55 41 54 53 48 83 ec 18 44 89 c5 49 89 cf 48 89 d3 49 89 f4 49 89 fe 23 2d 4d 56 ad 0c <89> ef e8 66 8d f4 ff 89 ef e8 5f 8e f4 ff f7 c5 00 04 00 00 74 16
RSP: 0018:ffffc900001f0468 EFLAGS: 00000202
RAX: 43b0de96b9854500 RBX: ffffc900001f04c0 RCX: 0000000000000001
RDX: ffffc900001f04c0 RSI: 0000000000000000 RDI: ffff888017c41500
RBP: 0000000000002920 R08: 0000000000002920 R09: 1ffff1100607e0b6
R10: dffffc0000000000 R11: ffffed100607e0b7 R12: 0000000000000000
R13: 00000000ffffffff R14: ffff888017c41500 R15: 0000000000000001
FS:  00007fb47bbe56c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 000000004c35f000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 slab_alloc_node mm/slub.c:3477 [inline]
 __kmem_cache_alloc_node+0x53/0x250 mm/slub.c:3534
 kmalloc_trace+0x2a/0xe0 mm/slab_common.c:1098
 kmalloc include/linux/slab.h:600 [inline]
 kzalloc include/linux/slab.h:721 [inline]
 ref_tracker_alloc+0x163/0x4b0 lib/ref_tracker.c:203
 __netdev_tracker_alloc include/linux/netdevice.h:4112 [inline]
 netdev_hold include/linux/netdevice.h:4141 [inline]
 ___neigh_create+0xca4/0x23d0 net/core/neighbour.c:658
 ip6_finish_output2+0x156d/0x1620 net/ipv6/ip6_output.c:132
 dst_output include/net/dst.h:467 [inline]
 NF_HOOK include/linux/netfilter.h:304 [inline]
 ndisc_send_skb+0xbb9/0x1480 net/ipv6/ndisc.c:513
 addrconf_rs_timer+0x36b/0x640 net/ipv6/addrconf.c:4036
 call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x570/0x810 kernel/time/timer.c:2023
 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x27d/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:generic_exec_single+0x477/0x4e0 kernel/smp.c:418
Code: 75 11 e8 0c 0d 0b 00 48 85 db 75 16 e8 02 0d 0b 00 eb 15 e8 fb 0c 0b 00 e8 a6 6d 10 09 48 85 db 74 ea e8 ec 0c 0b 00 fb 31 c0 <48> c7 44 24 20 0e 36 e0 45 4b c7 04 2c 00 00 00 00 43 c7 44 2c 08
RSP: 0018:ffffc900138d7a00 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000080000
RDX: ffffc9000f3b2000 RSI: 0000000000002e68 RDI: 0000000000002e69
RBP: ffffc900138d7ad0 R08: ffffffff911eb5ff R09: 1ffffffff223d6bf
R10: dffffc0000000000 R11: fffffbfff223d6c0 R12: 1ffff9200271af44
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff9200271af65
 smp_call_function_single+0x36d/0x5a0 kernel/smp.c:647
 task_function_call kernel/events/core.c:120 [inline]
 perf_install_in_context+0x5bb/0x920 kernel/events/core.c:2950
 __do_sys_perf_event_open kernel/events/core.c:12949 [inline]
 __se_sys_perf_event_open+0x1841/0x1c60 kernel/events/core.c:12601
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fb47ad9de99
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:00007fb47bbe5028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fb47b025fa0 RCX: 00007fb47ad9de99
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000480
RBP: 00007fb47ae33eaf R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb47b026038 R14: 00007fb47b025fa0 R15: 00007fff04530178
 </TASK>