rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10506 jiffies, g=18037, q=368 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10496 (4294963665-4294953169), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10496 jiffies! g18037 f0x2 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:27600 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6848
 schedule_timeout+0x124/0x280 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2247
 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 11 Comm: kworker/u8:0 Not tainted 6.12.0-syzkaller-10296-gaaf20f870da0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: bat_events batadv_nc_worker
RIP: 0010:trace_hrtimer_cancel+0x17d/0x220 include/trace/events/timer.h:317
Code: 0d 40 00 88 7e 40 0f 94 c5 31 ff 89 ee e8 ab f5 12 00 40 84 ed 0f 84 a0 fe ff ff e8 bd f3 12 00 e8 f8 cb 84 ff e9 9d fe ff ff <e8> ae f3 12 00 e8 09 74 f8 ff 31 ff 89 c3 89 c6 e8 7e f5 12 00 84
RSP: 0000:ffffc90000007e10 EFLAGS: 00000002
RAX: 0000000080010002 RBX: 0000000000000001 RCX: ffffffff817bd7db
RDX: ffff88801cef2440 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffff888040932340 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000003 R12: ffff888040932340
R13: ffff8880b862cb00 R14: ffff8880b862ca00 R15: ffffffff893c2970
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c453e48 CR3: 000000005ba8a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 debug_deactivate kernel/time/hrtimer.c:476 [inline]
 __run_hrtimer kernel/time/hrtimer.c:1707 [inline]
 __hrtimer_run_queues+0x484/0xae0 kernel/time/hrtimer.c:1803
 hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1865
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:finish_task_switch.isra.0+0x220/0xcc0 kernel/sched/core.c:5243
Code: a9 0a 00 00 44 8b 0d 03 68 03 0f 45 85 c9 0f 85 c0 01 00 00 48 89 df e8 ae f8 ff ff e8 d9 f1 38 00 fb 65 48 8b 1d f0 4e a6 7e <48> 8d bb f8 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0000:ffffc90000107838 EFLAGS: 00000206
RAX: 00000000002fa339 RBX: ffff88801cef2440 RCX: 1ffffffff2ddc782
RDX: 0000000000000000 RSI: ffffffff8b6cdee0 RDI: ffffffff8bd1e240
RBP: ffffc90000107880 R08: 0000000000000001 R09: fffffbfff2dd0db5
R10: ffffffff96e86daf R11: 0000000000000002 R12: ffff8880b863f9e0
R13: ffff88801ef1a440 R14: 0000000000000000 R15: ffff8880b863ebc0
 context_switch kernel/sched/core.c:5372 [inline]
 __schedule+0xe60/0x5ad0 kernel/sched/core.c:6756
 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7078
 irqentry_exit+0x36/0x90 kernel/entry/common.c:354
 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:__local_bh_enable_ip+0xac/0x120 kernel/softirq.c:389
Code: 1d 31 c2 b2 7e 65 8b 05 2a c2 b2 7e a9 00 ff ff 00 74 4d bf 01 00 00 00 e8 e1 c6 0b 00 e8 ec 64 45 00 fb 65 8b 05 0c c2 b2 7e <85> c0 74 52 5b 5d c3 cc cc cc cc 65 8b 05 7e 71 b1 7e 85 c0 75 9e
RSP: 0000:ffffc90000107b00 EFLAGS: 00000206
RAX: 0000000080000000 RBX: 00000000fffffe00 RCX: 1ffffffff2ddc782
RDX: 0000000000000000 RSI: ffffffff8b6cdee0 RDI: ffffffff8bd1e240
RBP: ffffffff8af2b2f6 R08: 0000000000000001 R09: fffffbfff2dd0db5
R10: ffffffff96e86daf R11: 0000000000000002 R12: ffffffff8af2b6a0
R13: ffff8880411ad100 R14: 0000000000000000 R15: ffff888035bf7980
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 batadv_nc_purge_paths+0x1c6/0x390 net/batman-adv/network-coding.c:471
 batadv_nc_worker+0x94a/0x1060 net/batman-adv/network-coding.c:722
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
 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>