rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P8161/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=30009, q=931 ncpus=2)
task:syz.9.483       state:R  running task     stack:23952 pid:8161  tgid:8160  ppid:6907   task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5256 [inline]
 __schedule+0x14bc/0x5000 kernel/sched/core.c:6863
 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7190
 irqentry_exit+0x5d8/0x660 kernel/entry/common.c:216
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:nla_put+0xb8/0x150 lib/nlattr.c:1096
Code: 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 8c 00 00 00 45 2b 65 00 45 8d 6e 07 41 83 e5 fc 44 89 e7 44 89 ee e8 3b e4 fa fc 45 39 ec <7c> 2c e8 71 e2 fa fc 4c 89 ff 89 ee 44 89 f2 48 8b 0c 24 e8 00 fd
RSP: 0018:ffffc90005376520 EFLAGS: 00000202
RAX: ffffffff84c6ce85 RBX: dffffc0000000000 RCX: 0000000000000002
RDX: ffff88802f6b0000 RSI: 0000000000000008 RDI: 000000000000093c
RBP: 0000000000000008 R08: ffffffff8f821e77 R09: 1ffffffff1f043ce
R10: dffffc0000000000 R11: fffffbfff1f043cf R12: 000000000000093c
R13: 0000000000000008 R14: 0000000000000001 R15: ffff888049b3e780
 nla_put_u8 include/net/netlink.h:1394 [inline]
 inet6_fill_ifla6_attrs+0x11e0/0x23e0 net/ipv6/addrconf.c:5850
 inet6_fill_link_af+0x9b/0x120 net/ipv6/addrconf.c:5881
 rtnl_fill_link_af+0x1c8/0x440 net/core/rtnetlink.c:1896
 rtnl_fill_ifinfo+0x1cb2/0x1fa0 net/core/rtnetlink.c:2167
 rtmsg_ifinfo_build_skb+0x17d/0x260 net/core/rtnetlink.c:4416
 rtmsg_ifinfo_event net/core/rtnetlink.c:4449 [inline]
 rtmsg_ifinfo+0x8c/0x1a0 net/core/rtnetlink.c:4458
 netif_state_change+0x289/0x380 net/core/dev.c:1586
 do_setlink+0x35de/0x41c0 net/core/rtnetlink.c:3405
 rtnl_group_changelink net/core/rtnetlink.c:3790 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3944 [inline]
 rtnl_newlink+0x14b0/0x1c90 net/core/rtnetlink.c:4072
 rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6958
 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x82f/0x9e0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg+0x21c/0x270 net/socket.c:742
 ____sys_sendmsg+0x505/0x820 net/socket.c:2592
 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2646
 __sys_sendmsg net/socket.c:2678 [inline]
 __do_sys_sendmsg net/socket.c:2683 [inline]
 __se_sys_sendmsg net/socket.c:2681 [inline]
 __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2681
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd9bc98f749
RSP: 002b:00007fd9bd7eb038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fd9bcbe5fa0 RCX: 00007fd9bc98f749
RDX: 0000000000000000 RSI: 0000200000000140 RDI: 0000000000000004
RBP: 00007fd9bca13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd9bcbe6038 R14: 00007fd9bcbe5fa0 R15: 00007ffebfa83c98
 </TASK>
rcu: rcu_preempt kthread starved for 10315 jiffies! g30009 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:27336 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5256 [inline]
 __schedule+0x14bc/0x5000 kernel/sched/core.c:6863
 __schedule_loop kernel/sched/core.c:6945 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6960
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:82
Code: 5e 93 b4 f5 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 93 a0 0c 00 f3 0f 1e fa fb f4 <e9> 33 93 b4 f5 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffffff8dc07d80 EFLAGS: 000002c6
RAX: 4befcfbc875b4d00 RBX: ffffffff81978eba RCX: 4befcfbc875b4d00
RDX: 0000000000000001 RSI: ffffffff8d7921b8 RDI: ffffffff8bc08360
RBP: ffffffff8dc07ea8 R08: ffff8880b86336db R09: 1ffff110170c66db
R10: dffffc0000000000 R11: ffffed10170c66dc R12: ffffffff8f821e70
R13: 1ffffffff1b92a68 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888125e35000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4d4f773e80 CR3: 000000007c356000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
 default_idle+0x13/0x20 arch/x86/kernel/process.c:767
 default_idle_call+0x73/0xb0 kernel/sched/idle.c:122
 cpuidle_idle_call kernel/sched/idle.c:191 [inline]
 do_idle+0x1ea/0x520 kernel/sched/idle.c:332
 cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:430
 rest_init+0x2de/0x300 init/main.c:757
 start_kernel+0x3a7/0x400 init/main.c:1206
 x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
 x86_64_start_kernel+0x143/0x1c0 arch/x86/kernel/head64.c:291
 common_startup_64+0x13e/0x147
 </TASK>