rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=15709, q=589 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10483 (4294985733-4294975250), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10484 jiffies! g15709 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:26760 pid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5381 [inline]
 __schedule+0x1553/0x45a0 kernel/sched/core.c:6700
 preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7010
 irqentry_exit+0x67/0x70 kernel/entry/common.c:438
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:__free_object+0x97c/0xa70 arch/x86/include/asm/irqflags.h:-1
Code: 00 00 00 00 9c 8f 84 24 a0 00 00 00 f7 84 24 a0 00 00 00 00 02 00 00 42 c6 44 28 08 f8 75 7b f7 44 24 18 00 02 00 00 74 01 fb <48> 8b 44 24 30 48 b9 f8 f8 f8 f8 f8 f8 f8 f8 4a 89 4c 28 10 4a 89
RSP: 0018:ffffc90000167940 EFLAGS: 00000206
RAX: 1ffff9200002cf34 RBX: ffff8880721f60e8 RCX: 89be0b33a90cc200
RDX: dffffc0000000000 RSI: ffffffff8acacbe0 RDI: ffffffff8b1c9c20
RBP: ffffc90000167b18 R08: ffffffff8e8b666f R09: 1ffffffff1d16ccd
R10: dffffc0000000000 R11: fffffbfff1d16cce R12: ffff8880b8e38d68
R13: dffffc0000000000 R14: 1ffff110171c71ac R15: ffff8880b8e38d60
 free_object lib/debugobjects.c:424 [inline]
 debug_object_free+0x2c8/0x480 lib/debugobjects.c:867
 destroy_timer_on_stack kernel/time/timer.c:812 [inline]
 schedule_timeout+0x1a1/0x2d0 kernel/time/timer.c:2172
 rcu_gp_fqs_loop+0x313/0x1590 kernel/rcu/tree.c:1667
 rcu_gp_kthread+0x9d/0x3b0 kernel/rcu/tree.c:1866
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </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: 6537 Comm: syz.3.267 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:119 [inline]
RIP: 0010:lock_is_held_type+0x39/0x190 kernel/locking/lockdep.c:5818
Code: 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24 08 bd ff ff ff ff 83 3d f0 3c 03 04 00 0f 84 03 01 00 00 65 8b 05 ef 2b 7a 75 <85> c0 0f 85 f4 00 00 00 65 48 8b 1d f7 57 7b 75 83 bb dc 0a 00 00
RSP: 0018:ffffc9000bbaf778 EFLAGS: 00000002
RAX: 0000000000000000 RBX: 0000000000000000 RCX: b9a0ea19724f6800
RDX: ffff8880598ebc00 RSI: 00000000ffffffff RDI: ffffffff8d132220
RBP: 00000000ffffffff R08: ffff8880598e8007 R09: 1ffff1100b31d000
R10: dffffc0000000000 R11: ffffed100b31d001 R12: ffff8880598ebc00
R13: dffffc0000000000 R14: 1ffff92001775ef8 R15: dffffc0000000000
FS:  00007fe5b06976c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000058 CR3: 000000007a143000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 lock_is_held include/linux/lockdep.h:288 [inline]
 rcu_read_lock_sched_held+0x8a/0x110 kernel/rcu/update.c:125
 task_css_set include/linux/cgroup.h:423 [inline]
 task_dfl_cgroup include/linux/cgroup.h:492 [inline]
 task_psi_group+0x50/0x1a0 kernel/sched/psi.c:896
 psi_account_irqtime+0xe9/0x810 kernel/sched/psi.c:1025
 __schedule+0x897/0x45a0 kernel/sched/core.c:6694
 schedule+0xbd/0x170 kernel/sched/core.c:6774
 futex_wait_queue+0x138/0x1b0 kernel/futex/waitwake.c:355
 futex_wait+0x1ec/0x5e0 kernel/futex/waitwake.c:656
 do_futex+0x2ff/0x3e0 kernel/futex/syscalls.c:134
 __do_sys_futex kernel/futex/syscalls.c:211 [inline]
 __se_sys_futex+0x3a9/0x440 kernel/futex/syscalls.c:192
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fe5af79ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe5b06970e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007fe5afa15fa8 RCX: 00007fe5af79ce59
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fe5afa15fa8
RBP: 00007fe5afa15fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe5afa16038 R14: 00007fff0adef7a0 R15: 00007fff0adef888
 </TASK>