rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=136873, q=163 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4295024194-4295013692), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g136873 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x200
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=48961
rcu: rcu_preempt kthread starved for 10502 jiffies! g136873 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x200 ->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 stack:27160 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_timeout+0x12b/0x270
 rcu_gp_fqs_loop+0x301/0x1540
 rcu_gp_kthread+0x99/0x390
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </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: 1821 Comm: syz.0.12329 Not tainted 6.16.0-syzkaller-11895-gcca7a0aae895-dirty #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__hrtimer_run_queues+0x269/0xc60
Code: 11 00 4c 39 f3 0f 8c 3b 09 00 00 48 8b 84 24 a0 00 00 00 42 0f b6 04 28 84 c0 0f 85 18 05 00 00 8b 1d 5b c3 f5 0d 31 ff 89 de <e8> d2 ff 11 00 85 db 74 2c 48 8b bc 24 98 00 00 00 be ff ff ff ff
RSP: 0018:ffffc90000007d40 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff8880221e9cc0
RDX: 0000000000010000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000007e90 R08: ffff888035044357 R09: 0000000000000000
R10: ffff888035044340 R11: ffffed1006a0886b R12: ffff888035044340
R13: dffffc0000000000 R14: 00117eb2dc000000 R15: ffff88804b027c80
FS:  0000555573a4e500(0000) GS:ffff8880b8624000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f69c6a6afc8 CR3: 00000000205e2000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 hrtimer_interrupt+0x45b/0xaa0
 __sysvec_apic_timer_interrupt+0x10b/0x410
 sysvec_apic_timer_interrupt+0xa1/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:finish_task_switch+0x26b/0x950
Code: 0f 84 3c 01 00 00 48 85 db 0f 85 63 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 cf 17 ea 09 e8 5a 3f 36 00 fb 4c 8b 65 c0 <49> 8d bc 24 18 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc9000474f758 EFLAGS: 00000282
RAX: cfc7f55bac98d400 RBX: 0000000000000000 RCX: cfc7f55bac98d400
RDX: 0000000000000000 RSI: ffffffff8d9b4408 RDI: ffffffff8be32600
RBP: ffffc9000474f7b0 R08: ffffffff8fa34237 R09: 1ffffffff1f46846
R10: dffffc0000000000 R11: fffffbfff1f46847 R12: ffff8880221e9cc0
R13: dffffc0000000000 R14: ffff88803bff8000 R15: ffff88804b03ab58
 __schedule+0x17a0/0x4cc0
 schedule+0x165/0x360
 __futex_wait+0x1c3/0x3e0
 futex_wait+0x104/0x360
 do_futex+0x333/0x420
 __se_sys_futex+0x36f/0x400
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f69c5b8ebe9
Code: 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 01 48
RSP: 002b:00007ffd0d286428 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00000000000baf0c RCX: 00007f69c5b8ebe9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f69c5db5fac
RBP: 0000000000000032 R08: 7fffffffffffffff R09: 000000010d28671f
R10: 00007ffd0d286520 R11: 0000000000000246 R12: 00007f69c5db5fac
R13: 00007ffd0d286520 R14: 00000000000baf3e R15: 00007ffd0d286540
 </TASK>
