rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=9845, q=669 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294959242-4294948740), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g9845 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:29104 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5256 [inline]
 __schedule+0x1139/0x6150 kernel/sched/core.c:6863
 __schedule_loop kernel/sched/core.c:6945 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:6960
 schedule_timeout+0x123/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1ea/0xaf0 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x26d/0x380 kernel/rcu/tree.c:2285
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </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: 6113 Comm: syz.1.18 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:hrtimer_base_is_online kernel/time/hrtimer.c:118 [inline]
RIP: 0010:get_target_base kernel/time/hrtimer.c:217 [inline]
RIP: 0010:switch_hrtimer_base kernel/time/hrtimer.c:251 [inline]
RIP: 0010:__hrtimer_start_range_ns kernel/time/hrtimer.c:1257 [inline]
RIP: 0010:hrtimer_start_range_ns+0x50a/0x11f0 kernel/time/hrtimer.c:1322
Code: 48 89 ca 48 89 4c 24 60 83 e1 07 48 c1 ea 03 0f b6 04 02 38 c8 7f 08 84 c0 0f 85 38 09 00 00 48 8b 44 24 10 31 ff 0f b6 40 4c <41> 89 c6 88 44 24 38 41 83 e6 10 44 89 f6 e8 93 04 14 00 45 84 f6
RSP: 0018:ffffc90002ef7ae8 EFLAGS: 00000046
RAX: 0000000000000011 RBX: 0000000000000000 RCX: 0000000000000004
RDX: 1ffff11017085091 RSI: ffffffff8bf2b400 RDI: 0000000000000000
RBP: ffffffff93b33440 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: ffff88802fbd54b0 R12: 0000000000000000
R13: ffff88803509cf18 R14: 0000000000000000 R15: ffff8880b84284c0
FS:  00007f2bdff4a6c0(0000) GS:ffff8881248f5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000058 CR3: 00000000326a3000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __posixtimer_deliver_signal kernel/time/posix-timers.c:321 [inline]
 posixtimer_deliver_signal+0x30d/0x6b0 kernel/time/posix-timers.c:347
 dequeue_signal+0x307/0x520 kernel/signal.c:660
 get_signal+0x601/0x26d0 kernel/signal.c:2914
 arch_do_signal_or_restart+0x8f/0x7e0 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop+0x8c/0x540 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 do_syscall_64+0x4ee/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2bdf18f747
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:00007f2bdff4a0e8 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007f2bdf3e5fa8 RCX: 00007f2bdf18f749
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f2bdf3e5fa8
RBP: 00007f2bdf3e5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2bdf3e6038 R14: 00007ffefbfa8af0 R15: 00007ffefbfa8bd8
 </TASK>