rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10472 ticks this GP) idle=9a74/1/0x4000000000000000 softirq=12804/12806 fqs=5095
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1688653        373            0
rcu: 	cputime:    17505      34972           24   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=11713 q=1043 ncpus=2)
CPU: 0 PID: 6039 Comm: syz.3.57 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:__find_rr_leaf+0x223/0x760 net/ipv6/route.c:847
Code: ae b0 00 00 00 4d 89 ef 49 c1 ef 03 48 b8 00 00 00 00 00 fc ff df 41 80 3c 07 00 74 08 4c 89 ef e8 a2 86 9f f8 49 83 7d 00 00 <0f> 85 be 01 00 00 4d 8d be b8 00 00 00 4c 89 ff 89 de 8b 54 24 24
RSP: 0018:ffffc90000007260 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffff888028a7da00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900000073b8 R08: ffffc900000074e0 R09: ffffc900000074f0
R10: ffffc90000007340 R11: fffff52000000e6a R12: 1ffff1100ba1520c
R13: ffff88805d0a90b0 R14: ffff88805d0a9000 R15: 1ffff1100ba15216
FS:  00007fabb77e66c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5b0e8626ac CR3: 0000000027896000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 find_rr_leaf net/ipv6/route.c:891 [inline]
 rt6_select net/ipv6/route.c:935 [inline]
 fib6_table_lookup+0x3b5/0xa80 net/ipv6/route.c:2232
 ip6_pol_route+0x239/0x1230 net/ipv6/route.c:2268
 pol_lookup_func include/net/ip6_fib.h:641 [inline]
 fib6_rule_lookup+0x20c/0x570 net/ipv6/fib6_rules.c:116
 ip6_route_input_lookup net/ipv6/route.c:2337 [inline]
 ip6_route_input+0x732/0xa50 net/ipv6/route.c:2633
 ip6_rcv_finish+0x143/0x230 net/ipv6/ip6_input.c:77
 NF_HOOK+0x32d/0x3b0 include/linux/netfilter.h:304
 __netif_receive_skb_one_core net/core/dev.c:5634 [inline]
 __netif_receive_skb+0xcc/0x290 net/core/dev.c:5748
 process_backlog+0x391/0x6f0 net/core/dev.c:6076
 __napi_poll+0xc0/0x460 net/core/dev.c:6638
 napi_poll net/core/dev.c:6705 [inline]
 net_rx_action+0x616/0xc40 net/core/dev.c:6841
 handle_softirqs+0x280/0x820 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:mmdrop include/linux/sched/mm.h:53 [inline]
RIP: 0010:mmdrop_sched include/linux/sched/mm.h:82 [inline]
RIP: 0010:mmdrop_lazy_tlb_sched include/linux/sched/mm.h:109 [inline]
RIP: 0010:finish_task_switch+0x32a/0x8f0 kernel/sched/core.c:5280
Code: 42 0f b6 04 28 84 c0 0f 85 a6 02 00 00 f7 03 20 00 00 00 0f 85 93 01 00 00 4c 89 ff be 04 00 00 00 e8 8a ef 81 00 f0 41 ff 0f <0f> 84 a4 00 00 00 81 7d a8 80 00 00 00 0f 84 ac 00 00 00 48 83 c4
RSP: 0018:ffffc900053a7658 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff88801c7e5648 RCX: ffffffff815d6b06
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff88801c7e5580
RBP: ffffc900053a76b0 R08: ffff88801c7e5583 R09: 1ffff110038fcab0
R10: dffffc0000000000 R11: ffffed10038fcab1 R12: ffff888028a7df40
R13: dffffc0000000000 R14: ffff888028f88000 R15: ffff88801c7e5580
 context_switch kernel/sched/core.c:5384 [inline]
 __schedule+0x155b/0x45a0 kernel/sched/core.c:6700
 preempt_schedule_common+0x82/0xc0 kernel/sched/core.c:6867
 preempt_schedule+0xc0/0xd0 kernel/sched/core.c:6891
 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
 _raw_spin_unlock_irqrestore+0x111/0x120 kernel/locking/spinlock.c:194
 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
 pcpu_alloc+0xb8b/0x1860 mm/percpu.c:1843
 bpf_prog_alloc+0x64/0x1a0 kernel/bpf/core.c:140
 bpf_prog_load+0x6eb/0x1670 kernel/bpf/syscall.c:2684
 __sys_bpf+0x5ba/0x890 kernel/bpf/syscall.c:5477
 __do_sys_bpf kernel/bpf/syscall.c:5581 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5579 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5579
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fabb699c819
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:00007fabb77e6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fabb6c15fa0 RCX: 00007fabb699c819
RDX: 0000000000000048 RSI: 00002000000054c0 RDI: 0000000000000005
RBP: 00007fabb6a32c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fabb6c16038 R14: 00007fabb6c15fa0 R15: 00007ffdac0aac08
 </TASK>