rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=217485, q=1081 ncpus=1)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4295089788-4295079286), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g217485 f0x0 RCU_GP_ONOFF(3) ->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:27496 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x17d9/0x56c0 kernel/sched/core.c:7234
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7556
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x14f/0x8f0 kernel/entry/common.c:167
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:rcu_gp_init+0xbde/0x15c0 kernel/rcu/tree.c:-1
Code: 18 e2 bf 11 85 c0 75 0f 65 8b 05 a5 dd bf 11 85 c0 0f 85 ba 08 00 00 48 c7 c7 00 f8 b5 8e e8 b9 5c 26 0a 31 c0 e9 54 07 00 00 <b0> 01 85 db 7e 40 84 c0 74 3c 48 8b 05 31 ea 08 0d 48 c1 e8 02 8b
RSP: 0018:ffffc90000157c40 EFLAGS: 00000246
RAX: ffffffff8eb5fd00 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 0000000000000000 RSI: ffffffff8e228edb RDI: ffffffff8c4bbf80
RBP: ffffc90000157d30 R08: ffffffff90574837 R09: 1ffffffff20ae906
R10: dffffc0000000000 R11: fffffbfff20ae907 R12: 1ffff9200002af90
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000001
 rcu_gp_kthread+0x18b/0x2b0 kernel/rcu/tree.c:2315
 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: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 20935 Comm: syz.3.2711 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:lock_release+0x2d7/0x3c0 kernel/locking/lockdep.c:5893
Code: 0b ca 11 00 00 00 00 eb b5 e8 b5 cb 2d 0a f7 c3 00 02 00 00 74 b9 65 48 8b 05 45 c6 c9 11 48 3b 44 24 28 75 44 fb 48 83 c4 30 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 15 57 6d ff cc 48 8d 3d c2 f0 b7
RSP: 0018:ffffc90003d7f8e8 EFLAGS: 00000286
RAX: 7a4dfc2ec33ea900 RBX: 0000000000000287 RCX: 0000000000000046
RDX: 0000000000000000 RSI: ffffffff8e4adf3a RDI: ffffffff8c4bbf80
RBP: ffff88801e3de8a0 R08: ffffffff821be23f R09: 0000000000000000
R10: 0000000000000000 R11: ffff888022f6a9f8 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888022f6a9f8 R15: ffff88801e3ddd00
FS:  00007faae0bf66c0(0000) GS:ffff888124f55000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000058 CR3: 0000000030d3f000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 __copy_to_user include/linux/uaccess.h:151 [inline]
 save_xstate_epilog arch/x86/kernel/fpu/signal.c:126 [inline]
 copy_fpstate_to_sigframe+0xa7e/0xd20 arch/x86/kernel/fpu/signal.c:237
 get_sigframe+0x603/0x830 arch/x86/kernel/signal.c:163
 x64_setup_rt_frame+0x163/0xc50 arch/x86/kernel/signal_64.c:175
 setup_rt_frame arch/x86/kernel/signal.c:250 [inline]
 handle_signal arch/x86/kernel/signal.c:294 [inline]
 arch_do_signal_or_restart+0x456/0x860 arch/x86/kernel/signal.c:339
 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
 exit_to_user_mode_loop+0x104/0x730 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
 do_syscall_64+0x353/0x580 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faae299e0d9
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:00007faae0bf60e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffffc RBX: 00007faae2c25fa8 RCX: 00007faae299e0d9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007faae2c25fa8
RBP: 00007faae2c25fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007faae2c26038 R14: 00007ffec2f675e0 R15: 00007ffec2f676c8
 </TASK>