rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 1, t=10502 jiffies, g=8329, q=362 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294955034-4294944532), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g8329 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:26880 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0x10ec/0x40b0 kernel/sched/core.c:6561
 lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline]
 lockdep_hardirqs_on_prepare+0x3fc/0x760 kernel/locking/lockdep.c:4316
 </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: 1274 Comm: aoe_tx0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__lock_acquire+0x416/0x7c50 kernel/locking/lockdep.c:4986
Code: 74 0f e8 4d 06 6e 00 49 b8 00 00 00 00 00 fc ff df 49 89 5e 10 49 8d 5e 18 48 89 d8 48 c1 e8 03 48 89 44 24 68 42 80 3c 00 00 <74> 12 48 89 df e8 20 06 6e 00 49 b8 00 00 00 00 00 fc ff df 48 89
RSP: 0018:ffffc900000076c0 EFLAGS: 00000046
RAX: 1ffff11004eeb8e8 RBX: ffff88802775c740 RCX: 1ffff11004eeb8e9
RDX: 00000000000000e5 RSI: 0000000000000000 RDI: ffff88802775c738
RBP: ffffc90000007910 R08: dffffc0000000000 R09: 0000000000000001
R10: fffffbfff1bfe1c6 R11: 1ffffffff1bfe1c5 R12: ffff88802775c728
R13: 0000000000000000 R14: ffff88802775c728 R15: 00000000000000e5
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000058 CR3: 000000007ba26000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
 do_start_rt_bandwidth kernel/sched/rt.c:108 [inline]
 start_rt_bandwidth kernel/sched/rt.c:131 [inline]
 inc_rt_group kernel/sched/rt.c:1245 [inline]
 inc_rt_tasks kernel/sched/rt.c:1289 [inline]
 __enqueue_rt_entity kernel/sched/rt.c:1465 [inline]
 enqueue_rt_entity kernel/sched/rt.c:1514 [inline]
 enqueue_task_rt+0x5aa/0xe30 kernel/sched/rt.c:1549
 enqueue_task+0x182/0x2b0 kernel/sched/core.c:2059
 activate_task kernel/sched/core.c:2087 [inline]
 ttwu_do_activate+0x1b7/0x320 kernel/sched/core.c:3699
 ttwu_queue kernel/sched/core.c:3904 [inline]
 try_to_wake_up+0x5de/0x1080 kernel/sched/core.c:4227
 signal_wake_up_state kernel/signal.c:781 [inline]
 signal_wake_up include/linux/sched/signal.h:457 [inline]
 complete_signal+0x806/0xc50 kernel/signal.c:1075
 send_sigqueue+0x39a/0x600 kernel/signal.c:2004
 posix_timer_event kernel/time/posix-timers.c:360 [inline]
 posix_timer_fn+0x16a/0x3d0 kernel/time/posix-timers.c:386
 __run_hrtimer kernel/time/hrtimer.c:1747 [inline]
 __hrtimer_run_queues+0x554/0xd60 kernel/time/hrtimer.c:1811
 hrtimer_interrupt+0x3c5/0x9c0 kernel/time/hrtimer.c:1873
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
 __sysvec_apic_timer_interrupt+0x153/0x5a0 arch/x86/kernel/apic/apic.c:1124
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:finish_task_switch+0x26a/0x8f0 kernel/sched/core.c:5123
Code: 0f 84 3b 01 00 00 48 85 db 0f 85 5a 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 c0 f7 c1 08 e8 eb b6 2e 00 fb 4c 8b 65 c0 <49> 8d bc 24 f8 15 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc900055d7a78 EFLAGS: 00000286
RAX: c8af81a6f7194a00 RBX: 0000000000000000 RCX: c8af81a6f7194a00
RDX: dffffc0000000000 RSI: ffffffff8a6c0600 RDI: ffffffff8abef920
RBP: ffffc900055d7ad0 R08: dffffc0000000000 R09: ffffed10171c7559
R10: ffffed10171c7559 R11: 1ffff110171c7558 R12: ffff88802775bb80
R13: dffffc0000000000 R14: ffff8880243bd940 R15: ffff8880b8e3b590
 context_switch kernel/sched/core.c:5247 [inline]
 __schedule+0x10f4/0x40b0 kernel/sched/core.c:6561
 preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:6730
 preempt_schedule+0xa7/0xb0 kernel/sched/core.c:6754
 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
 _raw_spin_unlock_irq+0x3c/0x40 kernel/locking/spinlock.c:202
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 tx+0x42/0x170 drivers/block/aoe/aoenet.c:61
 kthread+0x1c6/0x3b0 drivers/block/aoe/aoecmd.c:1241
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>