rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5458/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=270301, q=406 ncpus=2)
task:kworker/u8:12   state:R  running task     stack:23424 pid:5458  tgid:5458  ppid:2      flags:0x00004000
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0xf15/0x5d00 kernel/sched/core.c:6745
 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7067
 irqentry_exit+0x36/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:batadv_iv_ogm_schedule_buff+0xc45/0x1500 net/batman-adv/bat_iv_ogm.c:843
Code: 85 4f 08 00 00 48 8b 1b 48 81 fb a0 0c ed 94 0f 84 dc 02 00 00 e8 eb dc e6 f6 48 8d 7b 78 48 89 f8 48 c1 e8 03 42 80 3c 30 00 <0f> 85 0b 08 00 00 41 80 3f 00 48 8b 6b 78 0f 85 07 08 00 00 49 3b
RSP: 0018:ffffc90003487b60 EFLAGS: 00000246
RAX: 1ffff11002e7f70f RBX: ffff8880173fb800 RCX: ffffffff8aa70c79
RDX: ffff88802a540000 RSI: ffffffff8aa706f5 RDI: ffff8880173fb878
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000003 R12: 00000000000000f0
R13: ffff88801bf60000 R14: dffffc0000000000 R15: ffffed10037ec00f
 batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:868 [inline]
 batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:861 [inline]
 batadv_iv_send_outstanding_bat_ogm_packet+0x31e/0x8d0 net/batman-adv/bat_iv_ogm.c:1712
 process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: rcu_preempt kthread starved for 10528 jiffies! g270301 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:28272 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0xf15/0x5d00 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6837
 schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2000
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2202
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 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:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 28275 Comm: syz-executor.2 Not tainted 6.10.0-rc4-syzkaller-00217-g35bb670d65fc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:mark_usage kernel/locking/lockdep.c:4566 [inline]
RIP: 0010:__lock_acquire+0x123c/0x3b30 kernel/locking/lockdep.c:5091
Code: e8 c9 90 ff ff 48 c7 c7 60 c0 2c 8b e8 1d b7 02 00 e8 18 31 65 09 e9 e2 fc ff ff 65 8b 05 44 eb 96 7e 85 c0 0f 85 0f 01 00 00 <48> b8 00 00 00 00 00 fc ff df 48 8b 7c 24 48 48 89 fa 48 c1 ea 03
RSP: 0018:ffffc900034f7ac8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff888051762902 RCX: 0000000000000001
RDX: 0000000000000002 RSI: 0000000000000000 RDI: ffff888051762901
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff942662d7 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8880517628e0 R15: 0000000000000004
FS:  00007fed397546c0(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ea72000 CR3: 0000000049a76000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 lock_acquire kernel/locking/lockdep.c:5754 [inline]
 lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719
 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
 _raw_spin_lock_irq+0x36/0x50 kernel/locking/spinlock.c:170
 spin_lock_irq include/linux/spinlock.h:376 [inline]
 __set_current_blocked kernel/signal.c:3097 [inline]
 set_current_blocked kernel/signal.c:3083 [inline]
 signal_delivered kernel/signal.c:2945 [inline]
 signal_setup_done+0x27d/0x570 kernel/signal.c:2957
 handle_signal arch/x86/kernel/signal.c:285 [inline]
 arch_do_signal_or_restart+0x4bb/0x7e0 arch/x86/kernel/signal.c:312
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x14a/0x2a0 kernel/entry/common.c:218
 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fed38aa4830
Code: 83 c0 16 83 e0 f7 74 12 50 48 8d 3d da 99 04 00 e8 15 78 fa ff 0f 1f 44 00 00 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 <83> ff 21 74 0b c3 66 2e 0f 1f 84 00 00 00 00 00 55 53 48 89 f3 48
RSP: 002b:00007fed39753bb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 00007fed38bb4128 RCX: 00007fed38a7d0a9
RDX: 00007fed39753bc0 RSI: 00007fed39753cf0 RDI: 0000000000000021
RBP: 00007fed38bb4120 R08: 00007fed397546c0 R09: 00007fed397546c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fed38bb412c
R13: 000000000000006e R14: 00007ffe3d18fee0 R15: 00007ffe3d18ffc8
 </TASK>