rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=96665, q=283 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4295092495-4295081993), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g96665 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:26208 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x1b33/0x51f0 kernel/sched/core.c:6767
 __schedule_loop kernel/sched/core.c:6845 [inline]
 schedule+0x163/0x360 kernel/sched/core.c:6860
 schedule_timeout+0x15b/0x2b0 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2e1/0x1340 kernel/rcu/tree.c:2046
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2248
 kthread+0x7b7/0x940 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </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 UID: 0 PID: 21315 Comm: syz.4.4826 Not tainted 6.14.0-syzkaller-07422-gacb4f33713b9 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:preempt_count_sub+0x32/0x170 kernel/sched/core.c:5884
Code: fb 48 c7 c0 40 ce 6a 9a 48 c1 e8 03 49 be 00 00 00 00 00 fc ff df 42 0f b6 04 30 84 c0 0f 85 d0 00 00 00 83 3d ee 26 da 18 00 <75> 22 65 8b 05 d5 e8 ce 11 89 c1 81 e1 ff ff ff 7f 39 d9 7c 27 81
RSP: 0018:ffffc90000a08608 EFLAGS: 00000046
RAX: 0000000000000004 RBX: 0000000000000001 RCX: ffffffff9a6ace03
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
RBP: ffff888029f5d0c8 R08: ffff88801222f2eb R09: 1ffff11002445e5d
R10: dffffc0000000000 R11: ffffed1002445e5e R12: dffffc0000000000
R13: ffff888029f5d008 R14: dffffc0000000000 R15: ffff88801222f340
FS:  00007f7f8301f6c0(0000) GS:ffff888125127000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f13668d56c0 CR3: 0000000069842000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
 _raw_spin_unlock+0x28/0x50 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:391 [inline]
 advance_sched+0x9b4/0xca0 net/sched/sch_taprio.c:981
 __run_hrtimer kernel/time/hrtimer.c:1791 [inline]
 __hrtimer_run_queues+0x5a6/0xd40 kernel/time/hrtimer.c:1855
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1917
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1049
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:obj_cgroup_put include/linux/memcontrol.h:775 [inline]
RIP: 0010:mod_objcg_state+0x5de/0x930 mm/memcontrol.c:2765
Code: 3c 23 00 74 08 4c 89 f7 e8 0f 96 f7 ff f6 84 24 81 00 00 00 02 0f 85 8b 00 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 8b 7c 24 28 <48> 85 ff 74 05 e8 d8 86 00 00 48 c7 44 24 60 0e 36 e0 45 48 8b 44
RSP: 0018:ffffc90000a08a60 EFLAGS: 00000206
RAX: 5b6af48dab85f900 RBX: 1ffff9200014115c RCX: 0000000000000002
RDX: 0000000000000002 RSI: ffffffff8e65d94c RDI: 0000000000000000
RBP: ffffc90000a08b70 R08: ffffffff905cac77 R09: 1ffffffff20b958e
R10: dffffc0000000000 R11: fffffbfff20b958f R12: dffffc0000000000
R13: 0000000000000058 R14: ffffc90000a08ae0 R15: 0000000000000246
 __memcg_slab_free_hook+0x9f/0x310 mm/memcontrol.c:3033
 memcg_slab_free_hook mm/slub.c:2201 [inline]
 slab_free mm/slub.c:4630 [inline]
 kmem_cache_free+0x226/0x410 mm/slub.c:4735
 put_pid kernel/pid.c:103 [inline]
 delayed_put_pid+0xc2/0x130 kernel/pid.c:112
 rcu_do_batch kernel/rcu/tree.c:2568 [inline]
 rcu_core+0xaac/0x17a0 kernel/rcu/tree.c:2824
 handle_softirqs+0x2d6/0x9b0 kernel/softirq.c:561
 do_softirq+0x11f/0x1e0 kernel/softirq.c:462
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x1be/0x200 kernel/softirq.c:389
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 virtio_transport_stream_has_data+0x68/0x90 net/vmw_vsock/virtio_transport_common.c:855
 virtio_transport_notify_poll_in+0x21/0x80 net/vmw_vsock/virtio_transport_common.c:948
 vsock_poll+0x594/0xbe0 net/vmw_vsock/af_vsock.c:1133
 sock_poll+0x34d/0x410 net/socket.c:1379
 vfs_poll include/linux/poll.h:82 [inline]
 select_poll_one fs/select.c:480 [inline]
 do_select+0x11ff/0x1c00 fs/select.c:536
 core_sys_select+0x89c/0xad0 fs/select.c:677
 do_pselect fs/select.c:759 [inline]
 __do_sys_pselect6 fs/select.c:802 [inline]
 __se_sys_pselect6+0x356/0x3e0 fs/select.c:793
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7f8218d169
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:00007f7f8301f038 EFLAGS: 00000246 ORIG_RAX: 000000000000010e
RAX: ffffffffffffffda RBX: 00007f7f823a5fa0 RCX: 00007f7f8218d169
RDX: 0000000000000000 RSI: 00002000000001c0 RDI: 0000000000000040
RBP: 00007f7f8220e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 00002000000002c0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7f823a5fa0 R15: 00007ffc6eb0f8d8
 </TASK>