rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2638 jiffies s: 1301 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: 4434 Comm: syz.2.14 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:strcpy+0x18/0xa0 lib/string.c:88
Code: 41 5d 41 5e 41 5f 5d c3 66 2e 0f 1f 84 00 00 00 00 00 55 41 57 41 56 41 54 53 48 89 f8 48 bb 00 00 00 00 00 fc ff df 45 31 f6 <4a> 8d 3c 36 48 89 f9 48 c1 e9 03 0f b6 0c 19 84 c9 75 26 42 0f b6
RSP: 0018:ffffc90000006850 EFLAGS: 00000006
RAX: ffffe8ffffcbf018 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000150018 RSI: ffffffff8a8e07a0 RDI: ffffe8ffffcbf026
RBP: 0000000000000071 R08: 0000000000000002 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff1c3f986 R12: dffffc0000000000
R13: 0000000000000034 R14: 000000000000000f R15: ffffffff8cb46c60
FS:  00007f2f639f06c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f621ff8 CR3: 000000002ec53000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 strcpy include/linux/fortify-string.h:600 [inline]
 perf_trace_lock_acquire+0x2f4/0x3e0 include/trace/events/lock.h:24
 trace_lock_acquire include/trace/events/lock.h:24 [inline]
 lock_acquire+0x452/0x4a0 kernel/locking/lockdep.c:5633
 seqcount_lockdep_reader_access+0xcd/0x1d0 include/linux/seqlock.h:102
 timekeeping_get_delta kernel/time/timekeeping.c:254 [inline]
 timekeeping_get_ns kernel/time/timekeeping.c:388 [inline]
 ktime_get+0x7b/0x270 kernel/time/timekeeping.c:848
 hrtimer_forward_now include/linux/hrtimer.h:509 [inline]
 perf_swevent_hrtimer+0x475/0x590 kernel/events/core.c:10932
 __run_hrtimer kernel/time/hrtimer.c:1747 [inline]
 __hrtimer_run_queues+0x521/0xd70 kernel/time/hrtimer.c:1811
 hrtimer_interrupt+0x3c5/0x9c0 kernel/time/hrtimer.c:1873
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
 __sysvec_apic_timer_interrupt+0x153/0x5a0 arch/x86/kernel/apic/apic.c:1124
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0x4d/0xc0 arch/x86/kernel/apic/apic.c:1118
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:__in6_dev_get include/net/addrconf.h:323 [inline]
RIP: 0010:ip6_ignore_linkdown include/net/addrconf.h:414 [inline]
RIP: 0010:find_match+0x106/0xc80 net/ipv6/route.c:784
Code: 00 c9 90 f8 e9 28 0a 00 00 e8 f6 c8 90 f8 eb 1f e8 9f ba 79 f8 41 89 c4 31 ff 89 c6 e8 43 cc 90 f8 45 85 e4 0f 84 c2 01 00 00 <e8> d5 c8 90 f8 49 bc 00 00 00 00 00 fc ff df 48 85 db 0f 84 00 0a
RSP: 0018:ffffc900000071a0 EFLAGS: 00000202
RAX: ffffffff88f1aacd RBX: ffff88805822a000 RCX: 0000000000000100
RDX: ffff888028968000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 1ffff1100abcc495 R08: ffffc900000074a0 R09: ffffc900000074b0
R10: dffffc0000000000 R11: fffff52000000e62 R12: 0000000000000001
R13: 0000000000000003 R14: 1ffff1100abcc497 R15: ffff888055e624bf
 __find_rr_leaf+0x245/0x760 net/ipv6/route.c:872
 find_rr_leaf net/ipv6/route.c:893 [inline]
 rt6_select net/ipv6/route.c:937 [inline]
 fib6_table_lookup+0x3b1/0xa80 net/ipv6/route.c:2223
 ip6_pol_route+0x244/0x1290 net/ipv6/route.c:2259
 pol_lookup_func include/net/ip6_fib.h:579 [inline]
 fib6_rule_lookup+0x208/0x5d0 net/ipv6/fib6_rules.c:116
 ip6_route_input_lookup net/ipv6/route.c:2328 [inline]
 ip6_route_input+0x725/0xa40 net/ipv6/route.c:2624
 ip6_rcv_finish+0x13f/0x230 net/ipv6/ip6_input.c:77
 NF_HOOK+0x329/0x3b0 include/linux/netfilter.h:302
 __netif_receive_skb_one_core net/core/dev.c:5594 [inline]
 __netif_receive_skb+0xcc/0x290 net/core/dev.c:5708
 process_backlog+0x38d/0x6f0 net/core/dev.c:6036
 __napi_poll+0xc0/0x460 net/core/dev.c:6603
 napi_poll net/core/dev.c:6670 [inline]
 net_rx_action+0x5dd/0xb20 net/core/dev.c:6784
 handle_softirqs+0x2a1/0x930 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
 sysvec_irq_work+0x9d/0xc0 arch/x86/kernel/irq_work.c:17
 </IRQ>
 <TASK>
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728
RIP: 0010:valid_section include/linux/mmzone.h:1759 [inline]
RIP: 0010:pfn_valid+0x132/0x420 include/linux/mmzone.h:1858
Code: 74 7d e8 61 bd a4 ff 4d 85 ff 75 11 e8 57 bd a4 ff eb 3d e8 50 bd a4 ff 4d 85 ff 74 ef 4d 89 fd 49 c1 ed 03 43 80 7c 25 00 00 <74> 08 4c 89 ff e8 04 a9 f5 ff 49 8b 2f 48 89 ee 48 83 e6 02 31 ff
RSP: 0018:ffffc900053cf4b8 EFLAGS: 00000246
RAX: ffffffff81ddb64f RBX: ffffffff81ddb60d RCX: 0000000000080000
RDX: ffffc9000f51b000 RSI: 000000000001a33f RDI: 000000000001a340
RBP: 0000000000000001 R08: dffffc0000000000 R09: 1ffffffff215ea48
R10: dffffc0000000000 R11: fffffbfff215ea49 R12: dffffc0000000000
R13: 1ffff11027fff22c R14: 000000000005d41c R15: ffff88813fff9160
 page_table_check_set+0x25/0x6d0 mm/page_table_check.c:108
 page_table_check_pte_set include/linux/page_table_check.h:83 [inline]
 set_pte_at arch/x86/include/asm/pgtable.h:1009 [inline]
 copy_present_pte mm/memory.c:1000 [inline]
 copy_pte_range mm/memory.c:1091 [inline]
 copy_pmd_range mm/memory.c:1177 [inline]
 copy_pud_range mm/memory.c:1214 [inline]
 copy_p4d_range mm/memory.c:1238 [inline]
 copy_page_range+0x24ea/0x3900 mm/memory.c:1332
 dup_mmap kernel/fork.c:702 [inline]
 dup_mm kernel/fork.c:1546 [inline]
 copy_mm+0xec3/0x1690 kernel/fork.c:1595
 copy_process+0x1979/0x4030 kernel/fork.c:2356
 kernel_clone+0x24b/0x900 kernel/fork.c:2762
 __do_sys_clone kernel/fork.c:2903 [inline]
 __se_sys_clone kernel/fork.c:2887 [inline]
 __x64_sys_clone+0x1a7/0x220 kernel/fork.c:2887
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f2f62b9bf79
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:00007f2f639effd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f2f62e16090 RCX: 00007f2f62b9bf79
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f2f62c327e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2f62e16128 R14: 00007f2f62e16090 R15: 00007ffcf506c038
 </TASK>