rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 ticks this GP) idle=2524/1/0x4000000000000000 softirq=309477/309477 fqs=0
rcu: 	(detected by 0, t=10503 jiffies, g=422641, q=423 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 27338 Comm: kworker/u4:0 Not tainted 6.4.0-rc6-syzkaller-01349-g712557f21072 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Workqueue: bat_events batadv_purge_orig
RIP: 0010:__lock_acquire+0x92f/0x5f30 kernel/locking/lockdep.c:5058
Code: ff ff 85 c0 0f 84 62 05 00 00 48 c7 c2 00 e4 df 91 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 14 02 48 c7 c0 00 e4 df 91 <83> e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 a0 4b 00 00 44 8b 0d a8
RSP: 0018:ffffc900001e0b18 EFLAGS: 00000802
RAX: ffffffff91dfe400 RBX: 0000000000000000 RCX: 1ffffffff22b2fa6
RDX: 0000000000000004 RSI: 0000000000000100 RDI: ffffffff91597d30
RBP: ffff88804201bb80 R08: 0000000000000000 R09: ffffffff9152fe17
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000002
R13: ffff88804201c6ba R14: 0000000000000002 R15: ffff88804201c698
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005591fe4a5bc8 CR3: 000000002c2d6000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lock_acquire kernel/locking/lockdep.c:5705 [inline]
 lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5670
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:350 [inline]
 advance_sched+0xd2/0xd20 net/sched/sch_taprio.c:935
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x5fa/0xbe0 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x320/0x7b0 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x14a/0x430 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x92/0xc0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:debug_spin_unlock kernel/locking/spinlock_debug.c:99 [inline]
RIP: 0010:do_raw_spin_unlock+0x1d/0x230 kernel/locking/spinlock_debug.c:140
Code: 08 e8 07 ef 70 00 eb a2 0f 1f 44 00 00 66 0f 1f 00 48 b8 00 00 00 00 00 fc ff df 41 55 41 54 55 48 89 fd 48 83 c7 04 48 89 fa <48> c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84
RSP: 0018:ffffc9000382fbc8 EFLAGS: 00000286
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000382fb70
RDX: ffff88802dd98b44 RSI: 0000000000000201 RDI: ffff88802dd98b44
RBP: ffff88802dd98b40 R08: 0000000000000001 R09: ffffffff8e7ac197
R10: fffffbfff1cf5832 R11: 1ffffffff18f47d1 R12: dffffc0000000000
R13: ffff88807e928dd0 R14: ffff88800012a700 R15: 000000000000022d
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:166 [inline]
 _raw_spin_unlock_bh+0x1e/0x30 kernel/locking/spinlock.c:210
 spin_unlock_bh include/linux/spinlock.h:395 [inline]
 batadv_purge_orig_ref+0xeb8/0x1590 net/batman-adv/originator.c:1259
 batadv_purge_orig+0x1b/0x60 net/batman-adv/originator.c:1272
 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
 kthread+0x344/0x440 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10502 jiffies! g422641 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=173296
rcu: rcu_preempt kthread starved for 10503 jiffies! g422641 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:28320 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5343 [inline]
 __schedule+0xc9a/0x5880 kernel/sched/core.c:6669
 schedule+0xde/0x1a0 kernel/sched/core.c:6745
 schedule_timeout+0x14e/0x2b0 kernel/time/timer.c:2167
 rcu_gp_fqs_loop+0x190/0x910 kernel/rcu/tree.c:1609
 rcu_gp_kthread+0x23a/0x360 kernel/rcu/tree.c:1808
 kthread+0x344/0x440 kernel/kthread.c:379
 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 27338 Comm: kworker/u4:0 Not tainted 6.4.0-rc6-syzkaller-01349-g712557f21072 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Workqueue: bat_events batadv_purge_orig
RIP: 0010:__run_hrtimer kernel/time/hrtimer.c:1651 [inline]
RIP: 0010:__hrtimer_run_queues+0x938/0xbe0 kernel/time/hrtimer.c:1749
Code: 0d 15 0b 90 7e 40 0f 94 c5 31 ff 89 ee e8 00 92 10 00 40 84 ed 0f 84 cf fa ff ff e8 12 96 10 00 e8 ed d8 8c ff e9 c0 fa ff ff <e8> 03 96 10 00 49 8d 7e 18 be ff ff ff ff e8 b5 4b 9e 08 31 ff 89
RSP: 0018:ffffc900001e0e40 EFLAGS: 00000002
RAX: 0000000080010202 RBX: ffff8880274bb340 RCX: ffffffff8173ab77
RDX: ffff88804201bb80 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000022f1b448680
R13: ffff8880b992b8c0 R14: ffff8880b992b840 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005591fe4a5bc8 CR3: 000000002c2d6000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 hrtimer_interrupt+0x320/0x7b0 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x14a/0x430 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x92/0xc0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:debug_spin_unlock kernel/locking/spinlock_debug.c:99 [inline]
RIP: 0010:do_raw_spin_unlock+0x1d/0x230 kernel/locking/spinlock_debug.c:140
Code: 08 e8 07 ef 70 00 eb a2 0f 1f 44 00 00 66 0f 1f 00 48 b8 00 00 00 00 00 fc ff df 41 55 41 54 55 48 89 fd 48 83 c7 04 48 89 fa <48> c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84
RSP: 0018:ffffc9000382fbc8 EFLAGS: 00000286
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000382fb70
RDX: ffff88802dd98b44 RSI: 0000000000000201 RDI: ffff88802dd98b44
RBP: ffff88802dd98b40 R08: 0000000000000001 R09: ffffffff8e7ac197
R10: fffffbfff1cf5832 R11: 1ffffffff18f47d1 R12: dffffc0000000000
R13: ffff88807e928dd0 R14: ffff88800012a700 R15: 000000000000022d
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:166 [inline]
 _raw_spin_unlock_bh+0x1e/0x30 kernel/locking/spinlock.c:210
 spin_unlock_bh include/linux/spinlock.h:395 [inline]
 batadv_purge_orig_ref+0xeb8/0x1590 net/batman-adv/originator.c:1259
 batadv_purge_orig+0x1b/0x60 net/batman-adv/originator.c:1272
 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
 kthread+0x344/0x440 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>