rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 GPs behind) idle=bbf4/1/0x4000000000000000 softirq=101061/101062 fqs=1
rcu: 	(detected by 0, t=10502 jiffies, g=131321, q=208 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 15990 Comm: syz.2.2391 Not tainted 6.11.0-rc3-syzkaller-00013-g6b0f8db921ab #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:advance_sched+0x25a/0xca0 net/sched/sch_taprio.c:941
Code: 89 5c 24 20 4c 89 74 24 68 49 8d 9f 50 01 00 00 48 89 d9 48 c1 e9 03 48 b8 00 00 00 00 00 fc ff df 48 89 4c 24 48 80 3c 01 00 <74> 08 48 89 df e8 ac bc 3d f8 4c 8b 2b 48 8b 04 24 48 8d a8 40 01
RSP: 0018:ffffc90000a18c90 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffff888058866550 RCX: 1ffff1100b10ccaa
RDX: 0000000000010000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffffff89bd00bd R09: fffff52000143180
R10: dffffc0000000000 R11: fffff52000143180 R12: 0000000000000002
R13: ffffffff89bcfef0 R14: ffff888068295330 R15: ffff888058866400
FS:  000055555f10c500(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020003c80 CR3: 0000000022752000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __run_hrtimer kernel/time/hrtimer.c:1689 [inline]
 __hrtimer_run_queues+0x59d/0xd50 kernel/time/hrtimer.c:1753
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1815
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x112/0x3f0 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 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:finish_task_switch+0x1ea/0x870 kernel/sched/core.c:5062
Code: c9 50 e8 d9 b6 0b 00 48 83 c4 08 4c 89 f7 e8 7d 38 00 00 0f 1f 44 00 00 4c 89 f7 e8 40 20 5c 0a e8 fb d6 36 00 fb 48 8b 5d c0 <48> 8d bb f8 15 00 00 48 89 f8 48 c1 e8 03 49 be 00 00 00 00 00 fc
RSP: 0018:ffffc90003c87768 EFLAGS: 00000286
RAX: b221db7269dea500 RBX: ffff888020f9bc00 RCX: ffffffff94f26903
RDX: dffffc0000000000 RSI: ffffffff8c0ad560 RDI: ffffffff8c606400
RBP: ffffc90003c877b0 R08: ffffffff9017ce2f R09: 1ffffffff202f9c5
R10: dffffc0000000000 R11: fffffbfff202f9c6 R12: 1ffff11017267ef3
R13: dffffc0000000000 R14: ffff8880b933ea00 R15: ffff8880b933f798
 context_switch kernel/sched/core.c:5191 [inline]
 __schedule+0x1808/0x4a60 kernel/sched/core.c:6529
 preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6708
 preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6732
 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
 _raw_spin_unlock_irqrestore+0x130/0x140 kernel/locking/spinlock.c:194
 unlock_hrtimer_base kernel/time/hrtimer.c:1016 [inline]
 hrtimer_try_to_cancel+0x3b6/0x410 kernel/time/hrtimer.c:1340
 hrtimer_cancel+0x16/0x50 kernel/time/hrtimer.c:1447
 futex_wait+0x115/0x360 kernel/futex/waitwake.c:703
 do_futex+0x33b/0x560 kernel/futex/syscalls.c:102
 __do_sys_futex kernel/futex/syscalls.c:179 [inline]
 __se_sys_futex+0x3f9/0x480 kernel/futex/syscalls.c:160
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f49dc3799f9
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:00007ffe9e1113e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00000000001150ed RCX: 00007f49dc3799f9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f49dc51613c
RBP: 00007f49dc51613c R08: 00007f49dc515f80 R09: 00007ffe9e1116cf
R10: 00007ffe9e1114e0 R11: 0000000000000246 R12: 0000000000000032
R13: 00007ffe9e1114e0 R14: 00007ffe9e111500 R15: 00000000001150bb
 </TASK>
rcu: rcu_preempt kthread starved for 10500 jiffies! g131321 f0x0 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:24912 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2034
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236
 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:
CPU: 0 UID: 0 PID: 5305 Comm: kworker/0:6 Not tainted 6.11.0-rc3-syzkaller-00013-g6b0f8db921ab #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Workqueue: events drain_vmap_area_work
RIP: 0010:rep_nop arch/x86/include/asm/vdso/processor.h:13 [inline]
RIP: 0010:cpu_relax arch/x86/include/asm/vdso/processor.h:18 [inline]
RIP: 0010:csd_lock_wait kernel/smp.c:312 [inline]
RIP: 0010:smp_call_function_many_cond+0x185e/0x29d0 kernel/smp.c:856
Code: 00 00 45 8b 65 00 44 89 e6 83 e6 01 31 ff e8 99 14 0c 00 41 83 e4 01 49 bc 00 00 00 00 00 fc ff df 75 07 e8 44 10 0c 00 eb 38 <f3> 90 42 0f b6 04 23 84 c0 75 11 41 f7 45 00 01 00 00 00 74 1e e8
RSP: 0018:ffffc90002d1f920 EFLAGS: 00000293
RAX: ffffffff81876768 RBX: 1ffff110172688f9 RCX: ffff88802a639e00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90002d1faf0 R08: ffffffff81876737 R09: 1ffffffff26e5d09
R10: dffffc0000000000 R11: fffffbfff26e5d0a R12: dffffc0000000000
R13: ffff8880b93447c8 R14: ffff8880b923fb80 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1f791ffe00 CR3: 00000000a12b2000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1023
 __purge_vmap_area_lazy+0x458/0xae0 mm/vmalloc.c:2270
 drain_vmap_area_work+0x27/0x40 mm/vmalloc.c:2324
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0xa2e/0x1830 kernel/workqueue.c:3312
 worker_thread+0x86d/0xd40 kernel/workqueue.c:3390
 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>