rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P7915/1:b..l P26034/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=229373, q=441 ncpus=2)
task:modprobe        state:R  running task     stack:23680 pid:26034 tgid:26034 ppid:11810  flags:0x00000000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7067
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:mt_validate+0x2ca2/0x4aa0 lib/maple_tree.c:7596
Code: 00 00 00 89 de e8 7e 6f 1a f6 83 fb 0a 0f 83 33 01 00 00 41 89 de 48 8b 44 24 08 4e 8d 3c f0 41 83 c4 02 eb 76 e8 1e 6b 1a f6 <e9> 28 01 00 00 48 8b bc 24 40 01 00 00 be 01 00 00 00 e8 07 88 fe
RSP: 0018:ffffc900045bf700 EFLAGS: 00000293
RAX: ffffffff8b7bbc32 RBX: ffff888024ff9e88 RCX: ffff88806dc4bc00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000003
RBP: ffffc900045bf8f0 R08: ffffffff8b7bbb36 R09: ffffffff8b7daa4b
R10: 0000000000000004 R11: ffff88806dc4bc00 R12: 000000000000000d
R13: dffffc0000000000 R14: 0000000000000001 R15: ffff88802a647800
 validate_mm+0xe7/0x530 mm/mmap.c:288
 mmap_region+0x1a61/0x2090 mm/mmap.c:3000
 do_mmap+0x8ad/0xfa0 mm/mmap.c:1397
 vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:573
 ksys_mmap_pgoff+0x4f1/0x720 mm/mmap.c:1443
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ffafb2e1b74
RSP: 002b:00007ffcf26fecd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007ffcf26fed88 RCX: 00007ffafb2e1b74
RDX: 0000000000000003 RSI: 0000000000002000 RDI: 00007ffafb036000
RBP: 00007ffcf26ff0b0 R08: 0000000000000000 R09: 0000000000022000
R10: 0000000000000812 R11: 0000000000000246 R12: 00007ffafb2befc0
R13: 00007ffcf26ff138 R14: 0000000000021bd8 R15: 0000000000000000
 </TASK>
task:kworker/u8:0    state:R  running task     stack:18832 pid:7915  tgid:7915  ppid:2      flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7067
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:batadv_hardif_get_by_netdev+0x17d/0x4e0 net/batman-adv/hard-interface.c:72
Code: 48 8d 44 24 40 48 c1 e8 03 48 89 04 24 49 c7 c5 60 bd ba 94 4c 89 74 24 18 49 8d 5c 24 18 48 89 d8 48 c1 e8 03 42 80 3c 38 00 <74> 08 48 89 df e8 79 4b ad f6 4c 39 33 74 0a e8 0f 96 47 f6 e9 81
RSP: 0018:ffffc900030670e0 EFLAGS: 00000246
RAX: 1ffff11004cc4803 RBX: ffff888026624018 RCX: ffff8880219c0000
RDX: 0000000000000000 RSI: ffffffff8c1fe920 RDI: ffffffff8c1fe8e0
RBP: ffffc90003067190 R08: ffffffff8b4e9064 R09: 1ffffffff25f4eb0
R10: dffffc0000000000 R11: fffffbfff25f4eb1 R12: ffff888026624000
R13: ffffffff94babd60 R14: ffff888067de4000 R15: dffffc0000000000
 batadv_hard_if_event+0x82/0x1620 net/batman-adv/hard-interface.c:967
 notifier_call_chain+0x1a1/0x3e0 kernel/notifier.c:93
 call_netdevice_notifiers_extack net/core/dev.c:2030 [inline]
 call_netdevice_notifiers+0xb6/0xf0 net/core/dev.c:2044
 udp_tunnel_get_rx_info include/net/udp_tunnel.h:138 [inline]
 udp_tunnel_nic_register net/ipv4/udp_tunnel_nic.c:825 [inline]
 udp_tunnel_nic_netdevice_event+0xf2b/0x12f0 net/ipv4/udp_tunnel_nic.c:893
 notifier_call_chain+0x1a1/0x3e0 kernel/notifier.c:93
 call_netdevice_notifiers_extack net/core/dev.c:2030 [inline]
 call_netdevice_notifiers net/core/dev.c:2044 [inline]
 register_netdevice+0x1570/0x19e0 net/core/dev.c:10408
 nsim_init_netdevsim drivers/net/netdevsim/netdev.c:690 [inline]
 nsim_create+0x647/0x890 drivers/net/netdevsim/netdev.c:750
 __nsim_dev_port_add+0x6c0/0xae0 drivers/net/netdevsim/dev.c:1390
 nsim_dev_port_add_all drivers/net/netdevsim/dev.c:1446 [inline]
 nsim_dev_reload_create drivers/net/netdevsim/dev.c:1498 [inline]
 nsim_dev_reload_up+0x69b/0x8e0 drivers/net/netdevsim/dev.c:985
 devlink_reload+0x47a/0x870 net/devlink/dev.c:474
 devlink_pernet_pre_exit+0x1f3/0x440 net/devlink/core.c:509
 ops_pre_exit_list net/core/net_namespace.c:163 [inline]
 cleanup_net+0x617/0xcc0 net/core/net_namespace.c:620
 process_one_work kernel/workqueue.c:3248 [inline]
 process_scheduled_works+0xa2e/0x1830 kernel/workqueue.c:3329
 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: rcu_preempt kthread starved for 9979 jiffies! g229373 f0x0 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:25584 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6837
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2000
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2202
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.10.0-rc6-syzkaller-00069-g795c58e4c7fc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:72 [inline]
RIP: 0010:acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:113
Code: 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 c0 d4 03 00 48 f7 00 08 00 00 00 75 10 eb 07 0f 00 2d b5 5a a3 00 f3 0f 1e fa fb f4 <fa> e9 f4 23 2a 00 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90
RSP: 0018:ffffc900001a7d08 EFLAGS: 00000246
RAX: ffff8880176e0000 RBX: ffff88801bab9864 RCX: 0000000000885169
RDX: 0000000000000001 RSI: ffff88801bab9800 RDI: ffff88801bab9864
RBP: 000000000003a578 R08: ffff8880b9537ccb R09: 1ffff110172a6f99
R10: dffffc0000000000 R11: ffffffff8b8618c0 R12: ffff88801a76c000
R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8eacdca0
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8ace68ceac CR3: 000000002d3a4000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:707
 cpuidle_enter_state+0x114/0x480 drivers/cpuidle/cpuidle.c:267
 cpuidle_enter+0x5d/0xa0 drivers/cpuidle/cpuidle.c:388
 call_cpuidle kernel/sched/idle.c:155 [inline]
 cpuidle_idle_call kernel/sched/idle.c:236 [inline]
 do_idle+0x375/0x5d0 kernel/sched/idle.c:332
 cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:430
 start_secondary+0x100/0x100 arch/x86/kernel/smpboot.c:313
 common_startup_64+0x13e/0x147
 </TASK>