rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P4460/1:b..l
	(detected by 0, t=10502 jiffies, g=6881, q=184 ncpus=2)
task:syz-executor.4  state:R  running task     stack:0     pid:4460  ppid:4450   flags:0x0000000c
Call trace:
 __switch_to+0x320/0x754 arch/arm64/kernel/process.c:553
 context_switch kernel/sched/core.c:5241 [inline]
 __schedule+0xef4/0x1d44 kernel/sched/core.c:6558
 preempt_schedule_common+0xf4/0x1e8 kernel/sched/core.c:6727
 preempt_schedule+0x64/0x84 kernel/sched/core.c:6751
 vprintk_emit+0x29c/0x2e8 kernel/printk/printk.c:2304
 vprintk_default+0xa0/0xe4 kernel/printk/printk.c:2318
 vprintk+0x200/0x2d4 kernel/printk/printk_safe.c:45
 _printk+0xdc/0x128 kernel/printk/printk.c:2328
 batadv_check_known_mac_addr+0x25c/0x3a8 net/batman-adv/hard-interface.c:527
 batadv_hard_if_event+0x468/0xdfc net/batman-adv/hard-interface.c:992
 notifier_call_chain kernel/notifier.c:87 [inline]
 raw_notifier_call_chain+0xd4/0x164 kernel/notifier.c:455
 call_netdevice_notifiers_info net/core/dev.c:1970 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:2008 [inline]
 call_netdevice_notifiers net/core/dev.c:2022 [inline]
 dev_set_mac_address+0x394/0x4ec net/core/dev.c:8849
 dev_set_mac_address_user+0x44/0x68 net/core/dev.c:8863
 do_setlink+0x758/0x3318 net/core/rtnetlink.c:2785
 __rtnl_newlink net/core/rtnetlink.c:3605 [inline]
 rtnl_newlink+0x1424/0x1b74 net/core/rtnetlink.c:3652
 rtnetlink_rcv_msg+0x72c/0xd94 net/core/rtnetlink.c:6150
 netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2508
 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6168
 netlink_unicast_kernel net/netlink/af_netlink.c:1326 [inline]
 netlink_unicast+0x65c/0x898 net/netlink/af_netlink.c:1352
 netlink_sendmsg+0x834/0xb18 net/netlink/af_netlink.c:1874
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 __sys_sendto+0x3b8/0x508 net/socket.c:2153
 __do_sys_sendto net/socket.c:2165 [inline]
 __se_sys_sendto net/socket.c:2161 [inline]
 __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2161
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
rcu: rcu_preempt kthread starved for 10503 jiffies! g6881 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:0     pid:16    ppid:2      flags:0x00000008
Call trace:
 __switch_to+0x320/0x754 arch/arm64/kernel/process.c:553
 context_switch kernel/sched/core.c:5241 [inline]
 __schedule+0xef4/0x1d44 kernel/sched/core.c:6558
 schedule+0xc4/0x170 kernel/sched/core.c:6634
 schedule_timeout+0x1d8/0x344 kernel/time/timer.c:1965
 rcu_gp_fqs_loop+0x2cc/0x1538 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0xc0/0x308 kernel/rcu/tree.c:1905
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864
rcu: Stack dump where RCU GP kthread last ran:
Task dump for CPU 1:
task:syz-executor.2  state:R  running task     stack:0     pid:4686  ppid:4457   flags:0x00000004
Call trace:
 __switch_to+0x320/0x754 arch/arm64/kernel/process.c:553
 lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline]
 lock_acquire+0x278/0x7cc kernel/locking/lockdep.c:5664
 lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline]
 lockdep_hardirqs_on_prepare+0x44c/0x874 kernel/locking/lockdep.c:4316
 0x1d75dd340