rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 ticks this GP) idle=b02c/1/0x4000000000000000 softirq=16782/16782 fqs=149
rcu: 	(detected by 0, t=10502 jiffies, g=16601, q=655 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5155 Comm: jbd2/sda1-8 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:check_wait_context kernel/locking/lockdep.c:-1 [inline]
RIP: 0010:__lock_acquire+0x591/0x2cf0 kernel/locking/lockdep.c:5187
Code: c9 0f b6 81 c4 00 00 00 84 c0 0f 84 77 ff ff ff 41 0f b6 f4 0f b6 d0 40 38 c6 0f 42 d6 80 b9 c6 00 00 00 02 0f 84 60 ff ff ff <89> d0 e9 59 ff ff ff 48 c7 c7 90 b3 82 8e 4c 89 fe e8 69 a7 4a 03
RSP: 0018:ffffc90000a08b80 EFLAGS: 00000093
RAX: 0000000000000002 RBX: ffff888032d88bb0 RCX: ffffffff93e6dc30
RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffff888032d88bb8 R08: ffffffff84b9bfec R09: ffffffff9a69d940
R10: ffff88807cdbd308 R11: ffffed100f9b7a63 R12: ffffffffffffff02
R13: ffff888032d88bb8 R14: ffff888032d88000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888125345000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555835fc1a38 CR3: 000000000e74a000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline]
 _raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:166
 debug_object_deactivate+0x6c/0x3a0 lib/debugobjects.c:890
 debug_hrtimer_deactivate kernel/time/hrtimer.c:490 [inline]
 __run_hrtimer kernel/time/hrtimer.c:1898 [inline]
 __hrtimer_run_queues+0x23a/0xa20 kernel/time/hrtimer.c:1994
 hrtimer_interrupt+0x44b/0x950 kernel/time/hrtimer.c:2113
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 __sysvec_apic_timer_interrupt+0x102/0x430 arch/x86/kernel/apic/apic.c:1067
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1061
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:188 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:206
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 7a e6 eb f5 48 89 df e8 82 5b ec f5 e8 8d 77 17 f6 fb bf 01 00 00 00 <e8> 32 ed dd f5 65 8b 05 2b f0 87 07 85 c0 74 07 5b e9 d1 47 00 00
RSP: 0018:ffffc9001060f3a8 EFLAGS: 00000202
RAX: 00000000000017d5 RBX: ffff8880288f0400 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8dfb65fa RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff903215b7 R09: 1ffffffff20642b6
R10: dffffc0000000000 R11: fffffbfff20642b7 R12: dffffc0000000000
R13: 1ffff11004d88e1c R14: ffff8880288f0400 R15: 0000000000000000
 spin_unlock_irq include/linux/spinlock.h:402 [inline]
 blk_insert_flush+0x44f/0x5a0 block/blk-flush.c:458
 blk_mq_submit_bio+0x1a99/0x28e0 block/blk-mq.c:3241
 __submit_bio+0x1c0/0x580 block/blk-core.c:635
 __submit_bio_noacct_mq block/blk-core.c:722 [inline]
 submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:753
 journal_submit_commit_record+0x670/0x8b0 fs/jbd2/commit.c:156
 jbd2_journal_commit_transaction+0x34d1/0x5ad0 fs/jbd2/commit.c:875
 kjournald2+0x3e0/0x760 fs/jbd2/journal.c:201
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 8733 jiffies! g16601 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=6730
rcu: rcu_preempt kthread starved for 8734 jiffies! g16601 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:27544 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x17b4/0x5680 kernel/sched/core.c:7183
 __schedule_loop kernel/sched/core.c:7262 [inline]
 schedule+0x164/0x360 kernel/sched/core.c:7277
 schedule_timeout+0x158/0x2c0 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x312/0x11d0 kernel/rcu/tree.c:2095
 rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2297
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>