rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
	(detected by 0, t=10002 jiffies, g=1721, q=1004)
rcu: All QSes seen, last rcu_sched kthread activity 10002 (4294953138-4294943136), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_sched kthread starved for 10002 jiffies! g1721 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: 	Unless rcu_sched kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_sched       state:R  running task     stack:14360 pid:   12 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0x2b8/0x790 kernel/sched/core.c:6376
 schedule+0x53/0x90 kernel/sched/core.c:6459
 schedule_timeout+0xaf/0x140 kernel/time/timer.c:1914
 rcu_gp_fqs_loop+0xe2/0x320 kernel/rcu/tree.c:1972
 rcu_gp_kthread+0x77/0xe0 kernel/rcu/tree.c:2145
 kthread+0x10b/0x130 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 0
CPU: 0 PID: 3853 Comm: syz-executor.3 Not tainted 5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x41/0x5e lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x32/0x80 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x81/0x90 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
 rcu_check_gp_kthread_starvation+0x101/0x111 kernel/rcu/tree_stall.h:487
 print_other_cpu_stall kernel/rcu/tree_stall.h:592 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:745 [inline]
 rcu_pending kernel/rcu/tree.c:3932 [inline]
 rcu_sched_clock_irq.cold+0x89/0x1e7 kernel/rcu/tree.c:2619
 update_process_times+0x87/0xc0 kernel/time/timer.c:1818
 tick_sched_handle+0x1d/0x50 kernel/time/tick-sched.c:254
 tick_sched_timer+0x5c/0x70 kernel/time/tick-sched.c:1473
 __run_hrtimer kernel/time/hrtimer.c:1690 [inline]
 __hrtimer_run_queues+0x138/0x2e0 kernel/time/hrtimer.c:1754
 hrtimer_interrupt+0x109/0x230 kernel/time/hrtimer.c:1816
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x63/0x100 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x65/0x90 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:_raw_spin_unlock_irq+0x1c/0x20 kernel/locking/spinlock.c:203
Code: 00 00 5d e9 06 ff 08 ff 66 0f 1f 44 00 00 55 48 8b 74 24 08 48 89 fd 48 8d 7f 18 e8 9e 10 0e ff 48 89 ef e8 16 36 0e ff fb 5d <c3> 0f 1f 00 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8
RSP: 0018:ffffc90000ebbde8 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffffc90000ebbe70 RCX: ffffc90000ebbda4
RDX: 0000000000000000 RSI: ffff88810a200018 RDI: ffff88810a200000
RBP: ffff8881073e9b00 R08: 0000000000000020 R09: 0000000000000401
R10: 0000000000000021 R11: ffff8881073e9b00 R12: ffff888109ccc800
R13: ffff8881073e9b00 R14: ffff88810a200000 R15: ffffc90000ebbe90
 spin_unlock_irq include/linux/spinlock.h:413 [inline]
 get_signal+0x7f3/0xa70 kernel/signal.c:2903
 arch_do_signal_or_restart+0xf8/0x710 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:178 [inline]
 exit_to_user_mode_prepare+0xf2/0x160 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x12/0x30 kernel/entry/common.c:307
 do_syscall_64+0x40/0x80 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f2909c02ce7
Code: 14 25 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89
RSP: 002b:00007f2909785178 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007f2909d21f88 RCX: 00007f2909c02ce9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f2909d21f88
RBP: 00007f2909d21f80 R08: 00007f29097856c0 R09: 00007f29097856c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2909d21f8c
R13: 0000000000000006 R14: 00007fffa6be2150 R15: 00007fffa6be2238
 </TASK>