rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10480 ticks this GP) idle=f934/1/0x4000000000000000 softirq=162762/162763 fqs=124
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   102775          1            0
rcu: 	cputime:     1900       3189            7   ==> 5100(ms)
rcu: 	(t=10500 jiffies g=237513 q=2137 ncpus=2)
CPU: 0 PID: 4120 Comm: syz.0.9859 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:99 [inline]
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:227 [inline]
RIP: 0010:unwind_next_frame+0x4cf/0x2970 arch/x86/kernel/unwind_orc.c:494
Code: 75 3e 4d 63 2f 4d 01 fd 4c 89 ef 4c 89 f6 e8 98 e3 4b 00 49 8d 47 04 4d 39 f5 4c 0f 46 e0 49 8d 47 fc 48 0f 47 d8 49 0f 46 ef <49> 39 dc 77 28 e8 67 e1 4b 00 48 ba 00 00 00 00 00 fc ff df eb 97
RSP: 0018:ffffc90000007338 EFLAGS: 00000212
RAX: ffffffff8f05c8a4 RBX: ffffffff8f05c8a4 RCX: ffff8880635d5a00
RDX: 0000000000000100 RSI: ffffffff8a8eca94 RDI: ffffffff8a8ecab0
RBP: ffffffff8f05c880 R08: ffffc900000074d0 R09: 0000000000000012
R10: 0000000000000004 R11: 0000000000000100 R12: ffffffff8f05c884
R13: ffffffff8a8ecab0 R14: ffffffff8a8eca94 R15: ffffffff8f05c8a8
FS:  00007f39d063f6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f39cfa15fa0 CR3: 0000000053d07000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000200000000300
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:188 [inline]
 slab_post_alloc_hook+0x6e/0x4b0 mm/slab.h:767
 slab_alloc_node mm/slub.c:3495 [inline]
 slab_alloc mm/slub.c:3503 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3510 [inline]
 kmem_cache_alloc+0x11a/0x2d0 mm/slub.c:3519
 dst_alloc+0x105/0x170 net/core/dst.c:89
 ip6_dst_alloc net/ipv6/route.c:344 [inline]
 icmp6_dst_alloc+0x7b/0x400 net/ipv6/route.c:3316
 ndisc_send_skb+0x44e/0x14f0 net/ipv6/ndisc.c:493
 addrconf_rs_timer+0x2d5/0x630 net/ipv6/addrconf.c:4024
 call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x542/0x800 kernel/time/timer.c:2023
 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
 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:kvm_kick_cpu+0x79/0xb0 arch/x86/kernel/kvm.c:1036
Code: a4 00 48 c7 c3 d0 19 02 00 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 28 0f b7 0b b8 05 00 00 00 31 db 0f 01 c1 5b <41> 5e 41 5f c3 e8 fd 75 4c 00 89 de 48 c7 c7 a0 de f9 8c e8 df 2a
RSP: 0018:ffffc9001151fb28 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc90000a2cb88 RCX: 0000000000000001
RDX: ffffc9000f059000 RSI: 0000000000074c61 RDI: 0000000000074c62
RBP: 0000000000000000 R08: ffffc90000a2cb8b R09: 1ffff92000145971
R10: dffffc0000000000 R11: fffff52000145972 R12: 1ffff11047ffc3d8
R13: dffffc0000000000 R14: ffffffff8ca74a38 R15: dffffc0000000000
 pv_kick kernel/locking/qspinlock_paravirt.h:543 [inline]
 __pv_queued_spin_unlock_slowpath+0x198/0x2a0 kernel/locking/qspinlock_paravirt.h:543
 __raw_callee_save___pv_queued_spin_unlock_slowpath+0x15/0x30
 .slowpath+0x9/0x1a
 pv_queued_spin_unlock arch/x86/include/asm/paravirt.h:591 [inline]
 queued_spin_unlock arch/x86/include/asm/qspinlock.h:57 [inline]
 do_raw_spin_unlock+0x121/0x230 kernel/locking/spinlock_debug.c:141
 __raw_spin_unlock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_unlock+0x1e/0x40 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:391 [inline]
 futex_wake+0x41d/0x4f0 kernel/futex/waitwake.c:183
 do_futex+0x35d/0x3e0 kernel/futex/syscalls.c:139
 __do_sys_futex kernel/futex/syscalls.c:211 [inline]
 __se_sys_futex+0x3a9/0x440 kernel/futex/syscalls.c:192
 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: 0033:0x7f39cf79c799
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:00007f39d063f0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f39cfa15fa8 RCX: 00007f39cf79c799
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f39cfa15fac
RBP: 00007f39cfa15fa0 R08: 0000000000745a2b R09: 0000000000000000
R10: 0000000000000006 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f39cfa16038 R14: 00007ffe04ab1340 R15: 00007ffe04ab1428
 </TASK>