rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P15037/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=284825, q=372 ncpus=2)
task:kworker/u8:33   state:R  running task     stack:21288 pid:15037 tgid:15037 ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5263 [inline]
 __schedule+0x1836/0x4ed0 kernel/sched/core.c:6871
 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7198
 irqentry_exit+0x5b5/0x640 kernel/entry/common.c:216
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:should_resched arch/x86/include/asm/preempt.h:104 [inline]
RIP: 0010:__local_bh_enable_ip+0x135/0x1c0 kernel/softirq.c:457
Code: 8b e8 af d7 d5 09 65 66 8b 05 8f c8 f0 10 66 85 c0 75 5a bf 01 00 00 00 e8 b8 8c 0b 00 e8 63 19 44 00 fb 65 8b 05 6b c8 f0 10 <85> c0 75 05 e8 d2 f0 ad ff 48 c7 04 24 0e 36 e0 45 4b c7 04 37 00
RSP: 0018:ffffc9000ce7f6e0 EFLAGS: 00000282
RAX: 0000000080000000 RBX: 0000000000000201 RCX: 28bc6e6735fb6a00
RDX: 0000000000000006 RSI: ffffffff8d78e538 RDI: ffffffff8bbf8160
RBP: ffffc9000ce7f778 R08: ffffffff8f7de477 R09: 1ffffffff1efbc8e
R10: dffffc0000000000 R11: fffffbfff1efbc8f R12: ffffffff8b24252e
R13: dffffc0000000000 R14: dffffc0000000000 R15: 1ffff920019cfedc
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 batadv_iv_ogm_queue_add+0x73e/0xd30 net/batman-adv/bat_iv_ogm.c:668
 batadv_iv_ogm_schedule_buff net/batman-adv/bat_iv_ogm.c:854 [inline]
 batadv_iv_ogm_schedule+0xb48/0xf00 net/batman-adv/bat_iv_ogm.c:873
 batadv_iv_send_outstanding_bat_ogm_packet+0x6c6/0x7e0 net/batman-adv/bat_iv_ogm.c:1709
 process_one_work+0x93a/0x15e0 kernel/workqueue.c:3261
 process_scheduled_works kernel/workqueue.c:3344 [inline]
 worker_thread+0x9b0/0xee0 kernel/workqueue.c:3425
 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: rcu_preempt kthread starved for 10369 jiffies! g284825 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:27032 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5263 [inline]
 __schedule+0x1836/0x4ed0 kernel/sched/core.c:6871
 __schedule_loop kernel/sched/core.c:6953 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6968
 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:82
Code: 83 f1 02 00 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 63 0f 0d 00 f3 0f 1e fa fb f4 <e9> 58 f1 02 00 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000197de0 EFLAGS: 000002c6
RAX: 98b5072ff0bb2300 RBX: ffffffff81979497 RCX: 98b5072ff0bb2300
RDX: 0000000000000001 RSI: ffffffff8d78e538 RDI: ffffffff8bbf8160
RBP: ffffc90000197f10 R08: ffff8880b873339b R09: 1ffff110170e6673
R10: dffffc0000000000 R11: ffffed10170e6674 R12: ffffffff8f7de470
R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff110039ddb70
FS:  0000000000000000(0000) GS:ffff888125fbc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb6dc0f3755 CR3: 000000000dd38000 CR4: 00000000003526f0
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:190 [inline]
 do_idle+0x1e7/0x510 kernel/sched/idle.c:330
 cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:428
 start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:312
 common_startup_64+0x13e/0x147
 </TASK>