rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=6869, q=18 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10499 (4294970394-4294959895), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10500 jiffies! g6869 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:26320 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a50 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6837
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x2df/0x1370 kernel/rcu/tree.c:2000
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2202
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5136 Comm: syz-executor121 Not tainted 6.9.0-syzkaller-08544-g4b377b4868ef #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:sched_clock_cpu+0x80/0x490 kernel/sched/clock.c:409
Code: 81 4c 8d 6c 24 40 49 c1 ed 03 48 b8 f1 f1 f1 f1 00 f3 f3 f3 4b 89 44 35 00 66 90 e8 9a 22 c6 ff 48 89 c3 48 03 1d 10 85 3d 0e <48> c7 44 24 40 0e 36 e0 45 4b c7 04 2e 00 00 00 00 65 48 8b 04 25
RSP: 0018:ffffc90000a18e40 EFLAGS: 00000003
RAX: 0000004d70aaddc0 RBX: 0000004d6fd59183 RCX: ffff8880298bda00
RDX: 0000000080010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000a18f10 R08: ffffffff813559f1 R09: 1ffffffff1f5977d
R10: dffffc0000000000 R11: fffffbfff1f5977e R12: ffffc90000a18ea0
R13: 1ffff920001431d0 R14: dffffc0000000000 R15: 0000000000000000
FS:  0000555579ec43c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002006b000 CR3: 0000000023ab0000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 irqtime_account_irq+0x74/0x1e0 kernel/sched/cputime.c:64
 account_hardirq_exit include/linux/vtime.h:154 [inline]
 __irq_exit_rcu+0xba/0x1c0 kernel/softirq.c:634
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:get_signal+0x1452/0x1740 kernel/signal.c:2921
Code: be 00 40 00 00 44 21 f6 31 ff e8 69 66 39 00 44 21 f3 0f 84 4f 02 00 00 e8 1b 62 39 00 31 ff 44 89 e6 e8 51 66 39 00 45 85 e4 <0f> 9f c0 48 c7 84 24 a0 00 00 00 0e 36 e0 45 48 b9 00 00 00 00 00
RSP: 0018:ffffc90002d6fc80 EFLAGS: 00000206
RAX: 0000000000000000 RBX: ffffc90002d6fe50 RCX: dffffc0000000000
RDX: ffff8880298bda00 RSI: 0000000000000021 RDI: 0000000000000000
RBP: ffffc90002d6fdb0 R08: ffffffff815ccfbf R09: 1ffffffff1f5977d
R10: dffffc0000000000 R11: fffffbfff1f5977e R12: 0000000000000021
R13: 1ffff11004ecf093 R14: ffff888027678498 R15: ffff888027678000
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
 do_syscall_64+0x102/0x240 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fde465f8e79
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 18 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 01 48
RSP: 002b:00007ffc81208c18 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007fde465f8e79
RDX: 000000002006b000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000555579ec4370
R13: 0000000000000002 R14: 00007ffc81208c90 R15: 00007ffc81208c80
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.866 msecs