rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P4129
	(detected by 1, t=10502 jiffies, g=41757, q=20 ncpus=2)
task:kworker/u4:11   state:R  running task     stack:22912 pid:4129  ppid:2      flags:0x00004008
Workqueue: bat_events batadv_nc_worker
Call Trace:
 <IRQ>
 sched_show_task+0x4d5/0x670 kernel/sched/core.c:8942
 rcu_print_detail_task_stall_rnp kernel/rcu/tree_stall.h:261 [inline]
 print_other_cpu_stall+0x1299/0x1640 kernel/rcu/tree_stall.h:606
 check_cpu_stall kernel/rcu/tree_stall.h:778 [inline]
 rcu_pending kernel/rcu/tree.c:3890 [inline]
 rcu_sched_clock_irq+0xaf6/0x1200 kernel/rcu/tree.c:2393
 update_process_times+0x147/0x1b0 kernel/time/timer.c:1869
 tick_sched_handle kernel/time/tick-sched.c:254 [inline]
 tick_sched_timer+0x386/0x550 kernel/time/tick-sched.c:1501
 __run_hrtimer kernel/time/hrtimer.c:1686 [inline]
 __hrtimer_run_queues+0x5a7/0xe50 kernel/time/hrtimer.c:1750
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:finish_task_switch+0x1d3/0x810 kernel/sched/core.c:5124
Code: 2e 0b 00 48 83 c4 08 4c 89 f7 e8 98 30 00 00 e9 8f 04 00 00 4c 89 f7 e8 7b 23 36 09 e8 06 1e 32 00 fb 49 8d bc 24 f8 15 00 00 <48> 89 f8 48 c1 e8 03 49 bd 00 00 00 00 00 fc ff df 42 0f b6 04 28
RSP: 0018:ffffc9000a0276e8 EFLAGS: 00000282
RAX: 2edc04925c4d6300 RBX: ffff8880b993b748 RCX: ffffffff816ad40a
RDX: dffffc0000000000 RSI: ffffffff8aec0240 RDI: ffff888077ad5178
RBP: ffffc9000a027730 R08: dffffc0000000000 R09: fffffbfff2093a5f
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888077ad3b80
R13: 1ffff110173276eb R14: ffff8880b983aa00 R15: ffff8880b993b758
 context_switch kernel/sched/core.c:5248 [inline]
 __schedule+0x1435/0x4550 kernel/sched/core.c:6558
 preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6870
 irqentry_exit+0x53/0x80 kernel/entry/common.c:439
 asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:658
RIP: 0010:lock_acquire+0x26f/0x5a0 kernel/locking/lockdep.c:5666
Code: 2b 00 74 08 4c 89 f7 e8 4f ab 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:ffffc9000a027a80 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92001404f5c RCX: 1ffff92001404efc
RDX: dffffc0000000000 RSI: ffffffff8aec13c0 RDI: ffffffff8b3d4660
RBP: ffffc9000a027be0 R08: dffffc0000000000 R09: fffffbfff2093a45
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92001404f58
R13: dffffc0000000000 R14: ffffc9000a027ae0 R15: 0000000000000246
 rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
 rcu_read_lock include/linux/rcupdate.h:791 [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:308
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10535 jiffies! g41757 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=21264
rcu: rcu_preempt kthread starved for 10536 jiffies! g41757 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27064 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:1965
 rcu_gp_fqs_loop+0x2d2/0x1150 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0xa3/0x3b0 kernel/rcu/tree.c:1905
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 8636 Comm: syz-executor.3 Not tainted 6.1.94-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:mark_lock+0x3/0x340 kernel/locking/lockdep.c:4589
Code: c1 0f 8c 73 ff ff ff 4c 89 ff e8 38 40 77 00 e9 66 ff ff ff e8 1e 46 20 09 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 55 41 57 <41> 56 41 55 41 54 53 48 83 ec 10 49 89 f7 48 89 3c 24 49 bd 00 00
RSP: 0018:ffffc9000368f6e8 EFLAGS: 00000002
RAX: 0000000000000001 RBX: ffff888014f14640 RCX: ffffffff816ad40a
RDX: 0000000000000008 RSI: ffff888014f14660 RDI: ffff888014f13b80
RBP: ffff888014f14660 R08: dffffc0000000000 R09: fffffbfff2093a4b
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888014f14658
R13: ffff888014f13b80 R14: ffff888014f14680 R15: 1ffff110029e28d0
FS:  00007f73c17f66c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33933000 CR3: 000000007b2e4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 mark_usage kernel/locking/lockdep.c:4549 [inline]
 __lock_acquire+0xc6a/0x1f80 kernel/locking/lockdep.c:5003
 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
 __might_fault+0xbd/0x110 mm/memory.c:5835
 __clear_user arch/x86/include/asm/uaccess_64.h:96 [inline]
 copy_fpstate_to_sigframe+0x184/0xda0 arch/x86/kernel/fpu/signal.c:216
 get_sigframe+0x378/0x4b0 arch/x86/kernel/signal.c:297
 __setup_rt_frame arch/x86/kernel/signal.c:472 [inline]
 setup_rt_frame arch/x86/kernel/signal.c:784 [inline]
 handle_signal arch/x86/kernel/signal.c:828 [inline]
 arch_do_signal_or_restart+0x4ef/0x1a10 arch/x86/kernel/signal.c:873
 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f73c2c7cf27
Code: 14 25 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 <0f> 05 48 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89
RSP: 002b:00007f73c17f6178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 00000000000000ca RBX: 00007f73c2db4128 RCX: 00007f73c2c7cf29
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f73c2db4128
RBP: 00007f73c2db4120 R08: 00007f73c17f66c0 R09: 00007f73c17f66c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f73c2db412c
R13: 000000000000006e R14: 00007fff02a67840 R15: 00007fff02a67928
 </TASK>