rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 3105 jiffies s: 901 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: 4352 Comm: syz-executor208 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:get_perf_callchain+0x23a/0x490 kernel/events/callchain.c:207
Code: 50 4c 8b 74 24 08 eb 11 e8 53 3d d9 ff eb 0a e8 4c 3d d9 ff c6 44 24 52 01 48 8d 7c 24 40 4c 89 f6 e8 4a 16 58 ff 8b 44 24 18 <44> 08 e0 3c 01 75 0a e8 2a 3d d9 ff e9 53 01 00 00 49 8d 9e 88 00
RSP: 0000:ffffc90000006b60 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff888075ca0888 RCX: dffffc0000000000
RDX: 0000000000010100 RSI: 0000000000000003 RDI: 0000000000000003
RBP: ffffc90000006c28 R08: ffffc90000007750 R09: ffffc90000006ad0
R10: dffffc0000000000 R11: fffff52000000d5c R12: 0000000000000000
R13: dffffc0000000000 R14: ffffc900000073b8 R15: 1ffff92000000d70
FS:  00007f53a88ec6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000080 CR3: 0000000074a69000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 perf_callchain kernel/events/core.c:7512 [inline]
 perf_prepare_sample+0x399/0x2020 kernel/events/core.c:7545
 __perf_event_output kernel/events/core.c:7730 [inline]
 perf_event_output_forward+0x197/0x2f0 kernel/events/core.c:7750
 __perf_event_overflow+0x457/0x630 kernel/events/core.c:9496
 perf_event_overflow kernel/events/core.c:9517 [inline]
 perf_swevent_hrtimer+0x472/0x630 kernel/events/core.c:10967
 __run_hrtimer kernel/time/hrtimer.c:1751 [inline]
 __hrtimer_run_queues+0x4e7/0xc90 kernel/time/hrtimer.c:1815
 hrtimer_interrupt+0x399/0x980 kernel/time/hrtimer.c:1877
 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:rcu_dynticks_curr_cpu_in_eqs include/linux/context_tracking.h:-1 [inline]
RIP: 0010:rcu_is_watching+0x40/0xa0 kernel/rcu/tree.c:721
Code: 73 60 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd 80 19 65 8c 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 70 26 67 00 <48> c7 c3 08 58 03 00 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38
RSP: 0000:ffffc90000007460 EFLAGS: 00000246
RAX: 1ffffffff18ca330 RBX: 0000000000000000 RCX: 200e3e27e010ea00
RDX: ffff88807cac8000 RSI: ffffffff8adee180 RDI: ffffffff8adee140
RBP: ffffc90000007510 R08: 0000000000000000 R09: 0000000000000002
R10: 0000000000000003 R11: 0000000000000100 R12: ffff888029181000
R13: ffff88802fb2f800 R14: ffffffff8c651980 R15: dffffc0000000000
 rcu_read_lock_held_common kernel/rcu/update.c:108 [inline]
 rcu_read_lock_bh_held+0x6d/0xf0 kernel/rcu/update.c:334
 __dev_queue_xmit+0xb87/0x3810 net/core/dev.c:4333
 neigh_output include/net/neighbour.h:545 [inline]
 ip6_finish_output2+0xdc6/0x15c0 net/ipv6/ip6_output.c:138
 dst_output include/net/dst.h:453 [inline]
 NF_HOOK include/linux/netfilter.h:302 [inline]
 ndisc_send_skb+0xc04/0x1520 net/ipv6/ndisc.c:513
 addrconf_rs_timer+0x367/0x640 net/ipv6/addrconf.c:3979
 call_timer_fn+0x1ac/0x670 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x56c/0x810 kernel/time/timer.c:2023
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x291/0x910 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_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:ptlock_ptr include/linux/mm.h:2443 [inline]
RIP: 0010:pte_lockptr include/linux/mm.h:2467 [inline]
RIP: 0010:do_anonymous_page mm/memory.c:4209 [inline]
RIP: 0010:handle_pte_fault mm/memory.c:5027 [inline]
RIP: 0010:__handle_mm_fault mm/memory.c:5171 [inline]
RIP: 0010:handle_mm_fault+0x31d9/0x3d40 mm/memory.c:5292
Code: 21 e7 49 c1 ef 06 48 b8 00 00 00 00 00 ea ff ff 4d 8d 7c 07 28 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 <74> 08 4c 89 ff e8 fd 1c 13 00 49 8b 3f 8b 84 24 f8 00 00 00 49 21
RSP: 0000:ffffc90004567c80 EFLAGS: 00000246
RAX: 1ffffd40000e9b7d RBX: 000000001d36f067 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90004567e50 R08: ffffea0001b712c7 R09: 1ffffd400036e258
R10: dffffc0000000000 R11: fffff9400036e259 R12: 000ffffffffff000
R13: 000000006dc4b867 R14: ffff88807e3987b8 R15: ffffea000074dbe8
 do_user_addr_fault+0x58e/0xb20 arch/x86/mm/fault.c:1338
 handle_page_fault arch/x86/mm/fault.c:1429 [inline]
 exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1482
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7f53a88fb054
Code: 01 00 00 e8 7e a5 02 00 e9 7e d2 ff ff 66 0f 1f 84 00 00 00 00 00 48 b8 80 00 00 00 00 20 00 00 48 b9 2f 64 65 76 2f 6e 65 74 <48> 89 08 48 b9 6e 65 74 2f 74 75 6e 00 48 89 48 05 eb 9c 66 0f 1f
RSP: 002b:00007f53a88ec170 EFLAGS: 00010246
RAX: 0000200000000080 RBX: 00007f53a89cd908 RCX: 74656e2f7665642f
RDX: 8117d0782487eb7e RSI: 0000000000000000 RDI: 00007f53a88ec5a8
RBP: 00007f53a89cd900 R08: 00007f53a88eccdc R09: 00007f53a88eccdc
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f53a89cd90c
R13: 000000000000000b R14: 00007ffe4e998510 R15: 00007ffe4e9985f8
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.930 msecs