rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2674 jiffies s: 3237 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4623 Comm: syz.1.86 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:pvclock_clocksource_read+0x11/0x770 arch/x86/kernel/pvclock.c:68
Code: 05 3c 24 c8 0d 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 1f 44 00 00 55 41 57 41 56 41 55 41 54 53 48 81 ec a0 00 00 00 <4c> 8d 47 08 4c 8d 4f 18 48 8d 77 1c 4c 8d 57 10 4c 8d 5f 03 48 89
RSP: 0018:ffffc900001e0420 EFLAGS: 00000082
RAX: f3f3f3f8f1f1f1f1 RBX: ffffc900001e0540 RCX: 9893c21786af2100
RDX: 0000000000000000 RSI: ffffffff8adf7180 RDI: ffffffff90829040
RBP: ffffc900001e05b8 R08: ffffffff8f00d22f R09: 1ffffffff1e01a45
R10: dffffc0000000000 R11: fffffbfff1e01a46 R12: 1ffff9200003c0a4
R13: dffffc0000000000 R14: ffff8880293a5a00 R15: ffffffff8c66d988
FS:  00007ff74d3fe6c0(0000) GS:ffff8880b8d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f763fff CR3: 00000000781ba000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 kvm_clock_read arch/x86/kernel/kvmclock.c:79 [inline]
 kvm_sched_clock_read+0x14/0x40 arch/x86/kernel/kvmclock.c:91
 sched_clock_cpu+0x6e/0x260 kernel/sched/clock.c:369
 irqtime_account_irq+0x6a/0x1b0 kernel/sched/cputime.c:60
 account_hardirq_exit include/linux/vtime.h:159 [inline]
 __irq_exit_rcu+0x99/0x230 kernel/softirq.c:676
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
 sysvec_irq_work+0x4f/0xc0 arch/x86/kernel/irq_work.c:17
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728
RIP: 0010:rcu_read_unlock_special+0x7f/0x510 kernel/rcu/tree_plugin.h:685
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 d2 68 95 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc900001e0760 EFLAGS: 00000206
RAX: 9893c21786af2100 RBX: 1ffff9200003c0f4 RCX: 9893c21786af2100
RDX: dffffc0000000000 RSI: ffffffff8a8c19a0 RDI: ffffffff8adf71a0
RBP: ffffc900001e0860 R08: ffffffff9193434f R09: 1ffffffff2326869
R10: dffffc0000000000 R11: fffffbfff232686a R12: 0000000000000246
R13: dffffc0000000000 R14: ffff8880b8d3bb00 R15: 0000000000000002
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 ndisc_send_skb+0xdc2/0x1520 net/ipv6/ndisc.c:521
 addrconf_rs_timer+0x367/0x640 net/ipv6/addrconf.c:3994
 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:get_lock_parent_ip include/linux/ftrace.h:950 [inline]
RIP: 0010:preempt_latency_start kernel/sched/core.c:5693 [inline]
RIP: 0010:preempt_count_add+0x80/0x190 kernel/sched/core.c:5718
Code: 83 3d f3 f2 4a 16 00 75 11 65 8b 05 f2 b0 a9 7e 0f b6 c0 3d f5 00 00 00 73 58 65 8b 05 e1 b0 a9 7e 25 ff ff ff 7f 39 f8 75 42 <48> 8b 5c 24 18 48 89 df e8 b3 80 0c 00 85 c0 74 09 31 db 31 ff e8
RSP: 0018:ffffc900039efde0 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffff8880790f1ec0 RCX: ffffffff97a3b103
RDX: 0000000000000000 RSI: 0000000000000100 RDI: 0000000000000001
RBP: ffffc900039eff48 R08: ffff8880b8d357cb R09: 1ffff110171a6af9
R10: dffffc0000000000 R11: ffffed10171a6afa R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000025 R15: dffffc0000000000
 __raw_spin_lock include/linux/spinlock_api_smp.h:132 [inline]
 _raw_spin_lock+0xe/0x40 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:351 [inline]
 alloc_fd+0x62/0x640 fs/file.c:494
 __sys_socketpair+0x64/0x540 net/socket.c:1710
 __do_sys_socketpair net/socket.c:1786 [inline]
 __se_sys_socketpair net/socket.c:1783 [inline]
 __x64_sys_socketpair+0x97/0xb0 net/socket.c:1783
 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: 0033:0x7ff74dd9e1d9
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:00007ff74d3fe028 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007ff74e025fa0 RCX: 00007ff74dd9e1d9
RDX: 00000000fffffffc RSI: 0000000000000005 RDI: 0000000000000025
RBP: 00007ff74de35888 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff74e026038 R14: 00007ff74e025fa0 R15: 00007fff97cf05f8
 </TASK>