rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=12589, q=848 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10499 (4294981763-4294971264), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10499 jiffies! g12589 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:26504 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5360 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6964
 __schedule_loop kernel/sched/core.c:7046 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7061
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x4bc/0x870 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:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6192 Comm: syz.0.38 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:debug_lockdep_rcu_enabled+0x2a/0x40 kernel/rcu/update.c:321
Code: f3 0f 1e fa 31 c0 83 3d 57 b2 59 04 00 74 1e 83 3d 3a e1 59 04 00 74 15 65 48 8b 0c 25 08 90 e7 92 31 c0 83 b9 2c 0b 00 00 00 <0f> 94 c0 e9 4e e1 02 00 cc cc cc cc cc cc cc cc cc cc cc cc cc cc
RSP: 0018:ffffc900032177b8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff92000642f00 RCX: ffff888025a80000
RDX: 0000000000000000 RSI: 000000000000008e RDI: ffffffff8ba58da0
RBP: ffffc900032178d8 R08: ffffc900032179ef R09: 0000000000000000
R10: ffffc900032179d0 R11: fffff52000642f3e R12: dffffc0000000000
R13: dffffc0000000000 R14: ffffffff8ba58da0 R15: 0000000000000000
FS:  00007f9158e276c0(0000) GS:ffff8881257a7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000058 CR3: 00000000323ac000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __might_resched+0x91/0x610 kernel/sched/core.c:8922
 __might_fault+0x77/0x130 mm/memory.c:7091
 __copy_to_user include/linux/uaccess.h:142 [inline]
 save_xstate_epilog arch/x86/kernel/fpu/signal.c:121 [inline]
 copy_fpstate_to_sigframe+0xa88/0xce0 arch/x86/kernel/fpu/signal.c:232
 get_sigframe+0x58d/0x7d0 arch/x86/kernel/signal.c:163
 x64_setup_rt_frame+0x15b/0xd40 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+0x3d7/0x750 arch/x86/kernel/signal.c:339
 exit_to_user_mode_loop+0x75/0x130 kernel/entry/common.c:40
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x2bd/0xfa0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9157f8eba7
Code: ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89
RSP: 002b:00007f9158e270e8 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007f91581d5fa8 RCX: 00007f9157f8eba9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f91581d5fa8
RBP: 00007f91581d5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f91581d6038 R14: 00007ffcea2e2680 R15: 00007ffcea2e2768
 </TASK>