rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5139/1:b..l
	(detected by 0, t=10503 jiffies, g=31861, q=13 ncpus=2)
task:kworker/u4:13   state:R  running task     stack:26136 pid:5139  ppid:2      flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6870
 irqentry_exit+0x53/0x80 kernel/entry/common.c:433
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:lock_acquire+0x26f/0x5a0 kernel/locking/lockdep.c:5666
Code: 2b 00 74 08 4c 89 f7 e8 af a2 77 00 f6 44 24 61 02 0f 85 84 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc90005ef7a80 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92000bdef5c RCX: 1ffff92000bdeefc
RDX: dffffc0000000000 RSI: ffffffff8aebf620 RDI: ffffffff8b3cf3c0
RBP: ffffc90005ef7be0 R08: dffffc0000000000 R09: fffffbfff2091c45
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000bdef58
R13: dffffc0000000000 R14: ffffc90005ef7ae0 R15: 0000000000000246
 rcu_lock_acquire include/linux/rcupdate.h:306 [inline]
 rcu_read_lock include/linux/rcupdate.h:747 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
 batadv_nc_worker+0xe8/0x610 net/batman-adv/network-coding.c:719
 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
rcu: rcu_preempt kthread starved for 10529 jiffies! g31861 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:26680 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1935
 rcu_gp_fqs_loop+0x2d2/0x1120 kernel/rcu/tree.c:1674
 rcu_gp_kthread+0xa3/0x3a0 kernel/rcu/tree.c:1873
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 8772 Comm: syz-executor.0 Not tainted 6.1.65-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: 41 b8 f5 ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 fe 80 d6 f6 48 89 df e8 66 be d7 f6 e8 a1 66 fd f6 fb bf 01 00 00 00 <e8> 46 4d ca f6 65 8b 05 f7 7e 6e 75 85 c0 74 02 5b c3 e8 34 9d 6c
RSP: 0018:ffffc9000624fa30 EFLAGS: 00000286
RAX: af5f48f226dbff00 RBX: ffff888088fd40c0 RCX: ffffffff91c86103
RDX: dffffc0000000000 RSI: ffffffff8aebe4a0 RDI: 0000000000000001
RBP: ffffc9000624fb10 R08: dffffc0000000000 R09: ffffed10111fa819
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff11010b444dc
R13: ffff888085a21dc0 R14: 0000000100000000 R15: 1ffff11010b444db
FS:  00005555572c3480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33321000 CR3: 00000000202af000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 spin_unlock_irq include/linux/spinlock.h:400 [inline]
 __set_current_blocked+0x2a5/0x2f0 kernel/signal.c:3051
 set_current_blocked kernel/signal.c:3035 [inline]
 signal_delivered kernel/signal.c:2898 [inline]
 signal_setup_done+0x397/0x5f0 kernel/signal.c:2910
 handle_signal arch/x86/kernel/signal.c:846 [inline]
 arch_do_signal_or_restart+0xd5a/0x1a10 arch/x86/kernel/signal.c:873
 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:297
 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fe5502a4270
Code: 83 c0 16 83 e0 f7 74 12 50 48 8d 3d 1a 85 04 00 e8 25 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:00007ffdd4693df8 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 00007fe55039bf80 RCX: 00007fe5502a7ef5
RDX: 00007ffdd4693e00 RSI: 00007ffdd4693f30 RDI: 0000000000000021
RBP: 00007fe55039d980 R08: 0000000000000000 R09: 0000000000000010
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000059c93
R13: ffffffffffffffff R14: 00007fe54fe00000 R15: 0000000000059952
 </TASK>
sched: RT throttling activated