rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5148/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=7761, q=569 ncpus=2)
task:syz-executor.4  state:R  running task     stack:20136 pid:5148  tgid:5148  ppid:5143   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x1a0b/0x4bb0 kernel/sched/core.c:6745
 preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6924
 preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6948
 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
 vprintk_emit+0x690/0x770 kernel/printk/printk.c:2346
 _printk+0xd5/0x120 kernel/printk/printk.c:2370
 batadv_check_known_mac_addr+0x2bd/0x410 net/batman-adv/hard-interface.c:528
 batadv_hard_if_event+0x3a5/0x1850 net/batman-adv/hard-interface.c:998
 notifier_call_chain+0x19f/0x3d0 kernel/notifier.c:93
 call_netdevice_notifiers_extack net/core/dev.c:2030 [inline]
 call_netdevice_notifiers net/core/dev.c:2044 [inline]
 dev_set_mac_address+0x3d9/0x510 net/core/dev.c:9043
 dev_set_mac_address_user+0x31/0x50 net/core/dev.c:9057
 do_setlink+0x8b3/0x41e0 net/core/rtnetlink.c:2855
 __rtnl_newlink net/core/rtnetlink.c:3696 [inline]
 rtnl_newlink+0x1809/0x20a0 net/core/rtnetlink.c:3743
 rtnetlink_rcv_msg+0x89b/0x10d0 net/core/rtnetlink.c:6595
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2564
 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]
 netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1361
 netlink_sendmsg+0x8db/0xcb0 net/netlink/af_netlink.c:1905
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 __sys_sendto+0x3a4/0x4f0 net/socket.c:2192
 __do_sys_sendto net/socket.c:2204 [inline]
 __se_sys_sendto net/socket.c:2200 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2200
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x82/0x160 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f7cdd07ebdc
RSP: 002b:00007ffe5134e6c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f7cddcd4620 RCX: 00007f7cdd07ebdc
RDX: 000000000000002c RSI: 00007f7cddcd4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffe5134e714 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f7cddcd4670 R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread starved for 10558 jiffies! g7761 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:25288 pid:16    tgid:16    ppid:2      flags:0x00004008
Call Trace:
 <IRQ>
 sched_show_task+0x506/0x6d0 kernel/sched/core.c:9191
 rcu_check_gp_kthread_starvation+0x1b8/0x300 kernel/rcu/tree_stall.h:549
 print_other_cpu_stall+0x1458/0x1590 kernel/rcu/tree_stall.h:658
 check_cpu_stall kernel/rcu/tree_stall.h:799 [inline]
 rcu_pending kernel/rcu/tree.c:4309 [inline]
 rcu_sched_clock_irq+0x9f4/0x1090 kernel/rcu/tree.c:2636
 update_process_times+0x1ce/0x230 kernel/time/timer.c:2485
 tick_sched_handle kernel/time/tick-sched.c:276 [inline]
 tick_nohz_handler+0x37c/0x500 kernel/time/tick-sched.c:297
 __run_hrtimer kernel/time/hrtimer.c:1687 [inline]
 __hrtimer_run_queues+0x551/0xd30 kernel/time/hrtimer.c:1751
 hrtimer_interrupt+0x396/0x980 kernel/time/hrtimer.c:1813
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x3e0 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:finish_task_switch+0x1ea/0x870 kernel/sched/core.c:5282
Code: c9 50 e8 09 a6 0b 00 48 83 c4 08 4c 89 f7 e8 5d 38 00 00 0f 1f 44 00 00 4c 89 f7 e8 b0 7e d0 09 e8 9b a0 36 00 fb 48 8b 5d c0 <48> 8d bb f8 15 00 00 48 89 f8 48 c1 e8 03 49 be 00 00 00 00 00 fc
RSP: 0018:ffffc90000157908 EFLAGS: 00000286
RAX: 71af361271431900 RBX: ffff888018a45a00 RCX: ffffffff93fac503
RDX: dffffc0000000000 RSI: ffffffff8b6a9e80 RDI: ffffffff8bbb1120
RBP: ffffc90000157950 R08: ffffffff8f43066f R09: 1ffffffff1e860cd
R10: dffffc0000000000 R11: fffffbfff1e860ce R12: 1ffff11017287e9f
R13: dffffc0000000000 R14: ffff8880b943e780 R15: ffff8880b943f4f8
 context_switch kernel/sched/core.c:5411 [inline]
 __schedule+0x1a13/0x4bb0 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6837
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x2df/0x1320 kernel/rcu/tree.c:2000
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2202
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 16 Comm: rcu_preempt Not tainted 6.9.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:finish_task_switch+0x1ea/0x870 kernel/sched/core.c:5282
Code: c9 50 e8 09 a6 0b 00 48 83 c4 08 4c 89 f7 e8 5d 38 00 00 0f 1f 44 00 00 4c 89 f7 e8 b0 7e d0 09 e8 9b a0 36 00 fb 48 8b 5d c0 <48> 8d bb f8 15 00 00 48 89 f8 48 c1 e8 03 49 be 00 00 00 00 00 fc
RSP: 0018:ffffc90000157908 EFLAGS: 00000286
RAX: 71af361271431900 RBX: ffff888018a45a00 RCX: ffffffff93fac503
RDX: dffffc0000000000 RSI: ffffffff8b6a9e80 RDI: ffffffff8bbb1120
RBP: ffffc90000157950 R08: ffffffff8f43066f R09: 1ffffffff1e860cd
R10: dffffc0000000000 R11: fffffbfff1e860ce R12: 1ffff11017287e9f
R13: dffffc0000000000 R14: ffff8880b943e780 R15: ffff8880b943f4f8
FS:  0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd25740cf00 CR3: 000000002cf18000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 context_switch kernel/sched/core.c:5411 [inline]
 __schedule+0x1a13/0x4bb0 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6837
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x2df/0x1320 kernel/rcu/tree.c:2000
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2202
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>