rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10504 jiffies, g=77129, q=311 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10504 (4295013305-4295002801), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10504 jiffies! g77129 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:28360 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5367 [inline]
 __schedule+0x1129/0x5c00 kernel/sched/core.c:6748
 __schedule_loop kernel/sched/core.c:6825 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:6840
 schedule_timeout+0x123/0x280 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1ea/0xb00 kernel/rcu/tree.c:2046
 rcu_gp_kthread+0x270/0x380 kernel/rcu/tree.c:2248
 kthread+0x3a4/0x760 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 27896 Comm: syz.3.3110 Not tainted 6.14.0-syzkaller-01103-g2df0c02dab82 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:26 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:87 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:147 [inline]
RIP: 0010:lock_acquire kernel/locking/lockdep.c:5869 [inline]
RIP: 0010:lock_acquire+0x1a0/0x350 kernel/locking/lockdep.c:5823
Code: da ff ff 48 c7 c7 2c 6d b8 8d 48 83 c4 28 e8 e7 d2 c5 09 b8 ff ff ff ff 65 0f c1 05 c2 24 05 12 83 f8 01 0f 85 6a 01 00 00 9c <58> f6 c4 02 0f 85 7f 01 00 00 48 83 3c 24 00 0f 84 ad fe ff ff fb
RSP: 0018:ffffc90000a08cb8 EFLAGS: 00000046
RAX: 0000000000000001 RBX: ffffffff9acb0018 RCX: ffffffff93a3de40
RDX: 0000000000000000 RSI: ffffffff8db86d2c RDI: ffffffff8bf367e0
RBP: 0000000000000000 R08: ddbbc63050e626de R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fc7d1a596c0(0000) GS:ffff888124b54000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000040 CR3: 0000000068350000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000000e DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
 debug_object_deactivate+0x135/0x3a0 lib/debugobjects.c:873
 debug_hrtimer_deactivate kernel/time/hrtimer.c:460 [inline]
 debug_deactivate kernel/time/hrtimer.c:502 [inline]
 __run_hrtimer kernel/time/hrtimer.c:1769 [inline]
 __hrtimer_run_queues+0x46f/0xad0 kernel/time/hrtimer.c:1865
 hrtimer_interrupt+0x397/0x8e0 kernel/time/hrtimer.c:1927
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x108/0x3f0 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:194
Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 e6 9a 37 f6 48 89 df e8 5e ee 37 f6 f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 <bf> 01 00 00 00 e8 75 62 28 f6 65 8b 05 6e 8a 3c 08 85 c0 74 16 5b
RSP: 0018:ffffc9000371fc18 EFLAGS: 00000246
RAX: 0000000000000002 RBX: ffff88802f353dd0 RCX: ffffffff81c2a9ef
RDX: 0000000000000000 RSI: ffffffff8dbabe7c RDI: ffffffff8bf367e0
RBP: 0000000000000246 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff90826e17 R11: 0000000000000000 R12: 0000000000000001
R13: ffff88807f0fc380 R14: ffff88802f353e20 R15: ffff88807f0fc740
 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
 ref_tracker_alloc+0x2fe/0x5b0 lib/ref_tracker.c:214
 __netns_tracker_alloc include/net/net_namespace.h:354 [inline]
 netns_tracker_alloc include/net/net_namespace.h:363 [inline]
 get_net_track include/net/net_namespace.h:380 [inline]
 sk_alloc+0x206/0xc20 net/core/sock.c:2246
 inet6_create net/ipv6/af_inet6.c:193 [inline]
 inet6_create+0x381/0x1300 net/ipv6/af_inet6.c:120
 __sock_create+0x335/0x8d0 net/socket.c:1548
 sock_create net/socket.c:1606 [inline]
 __sys_socket_create net/socket.c:1643 [inline]
 __sys_socket+0x14d/0x260 net/socket.c:1690
 __do_sys_socket net/socket.c:1704 [inline]
 __se_sys_socket net/socket.c:1702 [inline]
 __x64_sys_socket+0x72/0xb0 net/socket.c:1702
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc7d0b8d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc7d1a59038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007fc7d0da5fa0 RCX: 00007fc7d0b8d169
RDX: 0000000000000084 RSI: 0000000000000005 RDI: 000000000000000a
RBP: 00007fc7d0c0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc7d0da5fa0 R15: 00007fff3e775e98
 </TASK>
vkms_vblank_simulate: vblank timer overrun