rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P145/1:b..l
	(detected by 0, t=10502 jiffies, g=7641, q=685)
task:kworker/u4:2    state:R  running task     stack:24152 pid:  145 ppid:     2 flags:0x00004000
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11ef/0x43c0 kernel/sched/core.c:6395
 preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6799
 irqentry_exit+0x63/0x70 kernel/entry/common.c:432
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:kasan_set_track mm/kasan/common.c:45 [inline]
RIP: 0010:set_alloc_info mm/kasan/common.c:434 [inline]
RIP: 0010:____kasan_kmalloc mm/kasan/common.c:513 [inline]
RIP: 0010:__kasan_kmalloc+0x82/0xf0 mm/kasan/common.c:522
Code: 07 48 29 fe 48 ff c7 ba fc 00 00 00 31 c9 e8 25 20 00 00 4d 63 a7 bc 00 00 00 4d 85 e4 0f 94 c0 49 01 dc 0f 94 c1 08 c1 75 4f <65> 48 8b 05 b6 39 44 7e 8b 80 c8 05 00 00 41 89 04 24 49 89 e7 ba
RSP: 0018:ffffc900015ff640 EFLAGS: 00000246
RAX: ffffed10047ab400 RBX: ffff888023d5a000 RCX: 0000000000000000
RDX: 0000000000000008 RSI: 00000000000000fc RDI: ffffed10047ab480
RBP: ffffc900015ff860 R08: dffffc0000000000 R09: ffffed10047ab478
R10: 0000000076b236e3 R11: 00000000fba1594c R12: ffff888023d5a400
R13: 0000000000020a20 R14: 00000000000a2a20 R15: ffff888016c41dc0
 kmalloc_reserve net/core/skbuff.c:356 [inline]
 __alloc_skb+0x22c/0x750 net/core/skbuff.c:427
 __netdev_alloc_skb+0x110/0x4c0 net/core/skbuff.c:494
 __netdev_alloc_skb_ip_align include/linux/skbuff.h:3044 [inline]
 netdev_alloc_skb_ip_align include/linux/skbuff.h:3054 [inline]
 batadv_iv_ogm_aggregate_new net/batman-adv/bat_iv_ogm.c:561 [inline]
 batadv_iv_ogm_queue_add+0x7e8/0xd90 net/batman-adv/bat_iv_ogm.c:673
 batadv_iv_ogm_schedule_buff net/batman-adv/bat_iv_ogm.c:852 [inline]
 batadv_iv_ogm_schedule+0xae2/0xec0 net/batman-adv/bat_iv_ogm.c:871
 batadv_iv_send_outstanding_bat_ogm_packet+0x72f/0x840 net/batman-adv/bat_iv_ogm.c:1715
 process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
 worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
rcu: rcu_preempt kthread starved for 9929 jiffies! g7641 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:26960 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11ef/0x43c0 kernel/sched/core.c:6395
 schedule+0x11b/0x1e0 kernel/sched/core.c:6478
 schedule_timeout+0x184/0x2d0 kernel/time/timer.c:2117
 rcu_gp_fqs_loop+0x2be/0x11d0 kernel/rcu/tree.c:1972
 rcu_gp_kthread+0x9b/0x370 kernel/rcu/tree.c:2145
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 1 skipped: idling at default_idle+0xb/0x10 arch/x86/kernel/process.c:729