rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P14681/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=221997, q=239 ncpus=2)
task:kworker/u8:1    state:R  running task     stack:25248 pid:14681 tgid:14681 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:lock_acquire+0x1f2/0x560 kernel/locking/lockdep.c:5722
Code: c1 05 3a af 96 7e 83 f8 01 0f 85 ea 02 00 00 9c 58 f6 c4 02 0f 85 d5 02 00 00 48 85 ed 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc90003917a70 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000722f50 RCX: 0000000094dc5539
RDX: 0000000000000001 RSI: ffffffff8b2cb240 RDI: ffffffff8b8ff940
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff284cc58
R10: ffffffff942662c7 R11: 0000000000000003 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8dbb1920 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
 rcu_read_lock include/linux/rcupdate.h:781 [inline]
 batadv_iv_ogm_slide_own_bcast_window net/batman-adv/bat_iv_ogm.c:754 [inline]
 batadv_iv_ogm_schedule_buff+0x5ac/0x1500 net/batman-adv/bat_iv_ogm.c:825
 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 10533 jiffies! g221997 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:27872 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: 14044 Comm: kworker/1:2H Not tainted 6.10.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Workqueue:  0x0 (kblockd)
RIP: 0010:lock_acquire+0x50/0x560 kernel/locking/lockdep.c:5722
Code: ec b0 00 00 00 48 8d 5c 24 10 89 34 24 48 c1 eb 03 89 4c 24 04 48 c7 44 24 10 b3 8a b5 41 48 01 d8 48 c7 44 24 18 a0 b1 3a 8d <48> c7 44 24 20 40 da 6b 81 c7 00 f1 f1 f1 f1 c7 40 04 f1 f1 00 00
RSP: 0018:ffffc90000a18d58 EFLAGS: 00000082
RAX: fffff520001431ad RBX: 1ffff920001431ad RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88802f2f40d8
RBP: 0000000000000046 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: ffff88802f2f40d8 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3073e000 CR3: 0000000046532000 CR4: 00000000003506f0
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
 __lock_task_sighand+0xc2/0x340 kernel/signal.c:1412
 lock_task_sighand include/linux/sched/signal.h:746 [inline]
 do_send_sig_info kernel/signal.c:1300 [inline]
 group_send_sig_info+0x290/0x300 kernel/signal.c:1451
 do_bpf_send_signal+0x9a/0x1d0 kernel/trace/bpf_trace.c:838
 irq_work_single+0x1bc/0x260 kernel/irq_work.c:221
 irq_work_run_list+0x92/0xc0 kernel/irq_work.c:252
 irq_work_run+0x58/0xd0 kernel/irq_work.c:261
 __sysvec_irq_work+0x8c/0x410 arch/x86/kernel/irq_work.c:22
 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
 sysvec_irq_work+0x90/0xb0 arch/x86/kernel/irq_work.c:17
 </IRQ>
 <TASK>
 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738
RIP: 0010:finish_task_switch.isra.0+0x220/0xcc0 kernel/sched/core.c:5282
Code: a9 0a 00 00 44 8b 0d 37 27 86 0e 45 85 c9 0f 85 c0 01 00 00 48 89 df e8 ae f8 ff ff e8 69 db 36 00 fb 65 48 8b 1d 40 89 a5 7e <48> 8d bb f8 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0018:ffffc90003807b30 EFLAGS: 00000202
RAX: 0000000000105507 RBX: ffff8880209e8000 RCX: 1ffffffff1fc8031
RDX: 0000000000000000 RSI: ffffffff8b2caf40 RDI: ffffffff8b8ff940
RBP: ffffc90003807b78 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8fe44417 R11: 0000000000000000 R12: ffff8880b933f938
R13: ffff88802c285a00 R14: 0000000000000000 R15: ffff8880b933ebc0
 context_switch kernel/sched/core.c:5411 [inline]
 __schedule+0xf1d/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_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:709
RIP: 0010:preempt_count_add+0x4/0x150 kernel/sched/core.c:5873
Code: cc cc e8 4f 57 89 09 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <48> c7 c0 e0 4b b4 94 55 48 ba 00 00 00 00 00 fc ff df 48 89 c1 53
RSP: 0018:ffffc90003807df8 EFLAGS: 00000202
RAX: 0000000000004008 RBX: ffff8880209e8000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff8b2caf40 RDI: 0000000000000001
RBP: ffffed100413d000 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff8fe44417 R11: 0000000000000000 R12: ffff8880209e802c
R13: ffff8880209e8000 R14: ffffed1005e19c28 R15: fffffbfff1b01e40
 __schedule_loop kernel/sched/core.c:6821 [inline]
 schedule+0xe0/0x350 kernel/sched/core.c:6837
 worker_thread+0x2de/0xf70 kernel/workqueue.c:3408
 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>