rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P15514/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=146605, q=5 ncpus=2)
task:kworker/u4:27   state:R  running task     stack:21376 pid:15514 ppid:2      flags:0x00004000
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5343 [inline]
 __schedule+0x187b/0x4900 kernel/sched/core.c:6669
 preempt_schedule_irq+0xfb/0x1b0 kernel/sched/core.c:6981
 irqentry_exit+0x57/0x80 kernel/entry/common.c:433
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:debug_lockdep_rcu_enabled+0x29/0x30 kernel/rcu/update.c:320
Code: 90 f3 0f 1e fa 31 c0 83 3d 8b 59 a6 03 00 74 1d 83 3d ee 8c a6 03 00 74 14 65 48 8b 0d a0 42 54 75 31 c0 83 b9 c4 0a 00 00 00 <0f> 94 c0 c3 0f 1f 00 66 0f 1f 00 48 8b 3c 24 e8 43 fb ff ff 66 90
RSP: 0000:ffffc90005a77a58 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8880226e0000
RDX: 0000000000000000 RSI: ffffffff8b384460 RDI: ffffffff8b384420
RBP: ffffc90005a77b98 R08: ffffffff8a7abcf9 R09: fffffbfff206524d
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88804255f740
R13: dffffc0000000000 R14: dffffc0000000000 R15: ffff88802cab6800
 rcu_read_unlock include/linux/rcupdate.h:802 [inline]
 batadv_iv_ogm_slide_own_bcast_window net/batman-adv/bat_iv_ogm.c:771 [inline]
 batadv_iv_ogm_schedule_buff net/batman-adv/bat_iv_ogm.c:825 [inline]
 batadv_iv_ogm_schedule+0x647/0x1010 net/batman-adv/bat_iv_ogm.c:868
 batadv_iv_send_outstanding_bat_ogm_packet+0x6fe/0x810 net/batman-adv/bat_iv_ogm.c:1712
 process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2405
 worker_thread+0xa63/0x1210 kernel/workqueue.c:2552
 kthread+0x2b8/0x350 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10522 jiffies! g146605 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=128383
rcu: rcu_preempt kthread starved for 10528 jiffies! g146605 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:26336 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5343 [inline]
 __schedule+0x187b/0x4900 kernel/sched/core.c:6669
 schedule+0xc3/0x180 kernel/sched/core.c:6745
 schedule_timeout+0x1bd/0x310 kernel/time/timer.c:2167
 rcu_gp_fqs_loop+0x2c6/0x1010 kernel/rcu/tree.c:1609
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1808
 kthread+0x2b8/0x350 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </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 PID: 30983 Comm: kworker/1:14 Not tainted 6.4.0-rc5-syzkaller-00016-ga4d7d7011219 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
Workqueue: mld mld_ifc_work
RIP: 0010:fq_pie_qdisc_dequeue+0xf8/0xa40 net/sched/sch_fq_pie.c:244
Code: 1e 41 12 f9 49 8b 07 4c 39 f8 0f 84 92 08 00 00 e8 0d 6c ba f8 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 f8 40 12 f9 <4d> 8b 27 49 8d 6c 24 f0 49 89 ee 49 c1 ee 03 41 0f b6 04 1e 84 c0
RSP: 0000:ffffc90004ce73a8 EFLAGS: 00000246
RAX: 1ffff11002d7e35c RBX: dffffc0000000000 RCX: ffff8880402f3b80
RDX: 0000000000000000 RSI: ffff888016bf1ae0 RDI: ffff888080885370
RBP: ffff888016bf1ae0 R08: ffffffff88d11368 R09: ffffffff88ba5a0e
R10: 0000000000000002 R11: ffff8880402f3b80 R12: ffff888080885370
R13: ffff888016bf1800 R14: ffff888016bf1ae8 R15: ffff888016bf1ae0
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3f2e170000 CR3: 0000000016f3b000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 dequeue_skb net/sched/sch_generic.c:292 [inline]
 qdisc_restart net/sched/sch_generic.c:397 [inline]
 __qdisc_run+0x26e/0x20a0 net/sched/sch_generic.c:415
 __dev_xmit_skb net/core/dev.c:3868 [inline]
 __dev_queue_xmit+0x1397/0x38b0 net/core/dev.c:4210
 neigh_output include/net/neighbour.h:544 [inline]
 ip6_finish_output2+0xf80/0x1560 net/ipv6/ip6_output.c:134
 __ip6_finish_output net/ipv6/ip6_output.c:195 [inline]
 ip6_finish_output+0x6b0/0xa80 net/ipv6/ip6_output.c:206
 dst_output include/net/dst.h:458 [inline]
 NF_HOOK+0x16a/0x500 include/linux/netfilter.h:303
 mld_sendpack+0x848/0xdb0 net/ipv6/mcast.c:1820
 mld_send_cr net/ipv6/mcast.c:2121 [inline]
 mld_ifc_work+0x7d6/0xc90 net/ipv6/mcast.c:2653
 process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2405
 worker_thread+0xa63/0x1210 kernel/workqueue.c:2552
 kthread+0x2b8/0x350 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>