rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P13/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=51097, q=1693 ncpus=1)
task:kworker/u8:1    state:R  running task     stack:0     pid:13    tgid:13    ppid:2      task_flags:0x4208160 flags:0x00000010
Workqueue: events_power_efficient gc_worker
Call trace:
 __switch_to+0x2b4/0x6e4 arch/arm64/kernel/process.c:775 (T)
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x1370/0x2d80 kernel/sched/core.c:7234
 preempt_schedule_irq+0x74/0x174 kernel/sched/core.c:7556
 raw_irqentry_exit_cond_resched+0x30/0x40 kernel/entry/common.c:145
 irqentry_exit_to_kernel_mode_preempt+0x44/0x54 include/linux/irq-entry-common.h:468
 arm64_exit_to_kernel_mode_preempt+0x1c/0x38 arch/arm64/kernel/entry-common.c:69
 __el1_irq arch/arm64/kernel/entry-common.c:533 [inline]
 el1_interrupt+0x4c/0x60 arch/arm64/kernel/entry-common.c:543
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:548
 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:586
 rcu_is_watching+0x14/0x134 kernel/rcu/tree.c:748 (P)
 rcu_read_lock include/linux/rcupdate.h:841 [inline]
 gc_worker+0x234/0x144c net/netfilter/nf_conntrack_core.c:1532
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838
rcu: rcu_preempt kthread starved for 6615 jiffies! g51097 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:0     pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00000010
Call trace:
 __switch_to+0x2b4/0x6e4 arch/arm64/kernel/process.c:775 (T)
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x1370/0x2d80 kernel/sched/core.c:7234
 __schedule_loop kernel/sched/core.c:7311 [inline]
 schedule+0x13c/0x20c kernel/sched/core.c:7326
 schedule_timeout+0x13c/0x28c kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x284/0x13c4 kernel/rcu/tree.c:2123
 rcu_gp_kthread+0x148/0x230 kernel/rcu/tree.c:2325
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 2852 Comm: kworker/R-bat_e Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026
Workqueue: bat_events batadv_tt_purge
pstate: 23400005 (nzCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : __sanitizer_cov_trace_switch+0x68/0x94 kernel/kcov.c:351
lr : __sanitizer_cov_trace_switch+0x74/0x94 kernel/kcov.c:351
sp : ffff80008eb67840
x29: ffff80008eb67840 x28: ffff700011d6cf30 x27: dfff800000000000
x26: ffff80008a19b000 x25: ffff0000cf914000 x24: ffff80008eb67980
x23: ffff800089e0c590 x22: 0000000000000001 x21: 0000000000000003
x20: ffff800084ca082c x19: 000000000000dd86 x18: 000000006640253e
x17: ffff80011d2d8000 x16: ffff80008eb60000 x15: 0000000000000000
x14: 00000000ffff8000 x13: 0000000000000002 x12: ffff0000ce5f3a80
x11: 0000000009528823 x10: 000000000000001f x9 : 0000000000000101
x8 : 0000000000000000 x7 : ffff800084ca9c7c x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff800084ca082c
x2 : 000000000000dd86 x1 : 000000000000a888 x0 : 0000000000000003
Call trace:
 __sanitizer_cov_trace_switch+0x68/0x94 kernel/kcov.c:351 (P)
 __netif_receive_skb_core+0x378/0x2b60 net/core/dev.c:6036
 __netif_receive_skb_one_core+0x70/0x110 net/core/dev.c:6214
 __netif_receive_skb+0x34/0x128 net/core/dev.c:6329
 process_backlog+0x5f4/0x16f8 net/core/dev.c:6680
 __napi_poll+0xb4/0x328 net/core/dev.c:7739
 napi_poll net/core/dev.c:7802 [inline]
 net_rx_action+0x5b0/0xc14 net/core/dev.c:7959
 handle_softirqs+0x2ec/0xd98 kernel/softirq.c:622
 __do_softirq+0x14/0x20 kernel/softirq.c:656
 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:78
 call_on_irq_stack+0x30/0x48 arch/arm64/kernel/entry.S:885
 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:83
 do_softirq+0x90/0xf8 kernel/softirq.c:523
 __local_bh_enable_ip+0x240/0x35c kernel/softirq.c:450
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:196 [inline]
 _raw_spin_unlock_bh+0x3c/0x4c kernel/locking/spinlock.c:214
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 batadv_tt_local_purge+0x274/0x2f0 net/batman-adv/translation-table.c:1366
 batadv_tt_purge+0x44/0x7b4 net/batman-adv/translation-table.c:3565
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 rescuer_thread+0x68c/0xd90 kernel/workqueue.c:3629
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838