rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 GPs behind) idle=ef4c/1/0x4000000000000000 softirq=45525/45526 fqs=5
rcu: 	(detected by 1, t=10502 jiffies, g=45569, q=110 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 11850 Comm: syz.7.1333 Not tainted 6.12.0-syzkaller-09073-g9f16d5e6f220 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:check_preemption_disabled+0x19/0x120 lib/smp_processor_id.c:14
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 57 41 56 41 54 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24 08 <65> 8b 1d 0c d4 44 74 65 8b 05 01 d4 44 74 a9 ff ff ff 7f 74 26 65
RSP: 0018:ffffc90000007c18 EFLAGS: 00000086
RAX: 07ad2af3b8427500 RBX: ffffffff89c1d4c2 RCX: ffff888020b2da00
RDX: ffff888020b2da00 RSI: ffffffff8c5fa9c0 RDI: ffffffff8c5fa980
RBP: 0000000000000001 R08: ffffffff89c1d4f2 R09: 1ffffffff2857110
R10: dffffc0000000000 R11: fffffbfff2857111 R12: dffffc0000000000
R13: ffff88805bf12808 R14: ffff88805bf12800 R15: ffff888063774360
FS:  000055557941e500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33b16ff8 CR3: 000000004b07a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
 rcu_is_watching+0x15/0xb0 kernel/rcu/tree.c:737
 rcu_read_lock include/linux/rcupdate.h:850 [inline]
 advance_sched+0xa3b/0xca0 net/sched/sch_taprio.c:985
 __run_hrtimer kernel/time/hrtimer.c:1739 [inline]
 __hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1803
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1865
 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+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
 </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:5243
Code: c9 50 e8 79 07 0c 00 48 83 c4 08 4c 89 f7 e8 9d 39 00 00 e9 de 04 00 00 4c 89 f7 e8 60 92 63 0a e8 eb 99 38 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:ffffc9000c87f808 EFLAGS: 00000286
RAX: 07ad2af3b8427500 RBX: ffff888020b2da00 RCX: ffffffff9a3bf903
RDX: dffffc0000000000 RSI: ffffffff8c0ad8a0 RDI: ffffffff8c5fa9e0
RBP: ffffc9000c87f850 R08: ffffffff901c2377 R09: 1ffffffff203846e
R10: dffffc0000000000 R11: fffffbfff203846f R12: 1ffff110170c7eac
R13: dffffc0000000000 R14: ffff8880b863e740 R15: ffff8880b863f560
 context_switch kernel/sched/core.c:5372 [inline]
 __schedule+0x1803/0x4be0 kernel/sched/core.c:6756
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7078
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:obj_cgroup_put include/linux/memcontrol.h:779 [inline]
RIP: 0010:mod_objcg_state+0x5d9/0x930 mm/memcontrol.c:2766
Code: 3c 23 00 74 08 4c 89 f7 e8 84 e5 f6 ff f6 84 24 81 00 00 00 02 0f 85 89 00 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 8b 7c 24 28 <48> 85 ff 74 05 e8 5d 8e 00 00 48 c7 44 24 60 0e 36 e0 45 48 8b 44
RSP: 0018:ffffc9000c87fc00 EFLAGS: 00000206
RAX: 07ad2af3b8427500 RBX: 1ffff9200190ff90 RCX: ffffffff9a3bf903
RDX: dffffc0000000000 RSI: ffffffff8c0ad8a0 RDI: 0000000000000000
RBP: ffffc9000c87fd10 R08: ffffffff901c2377 R09: 1ffffffff203846e
R10: dffffc0000000000 R11: fffffbfff203846f R12: dffffc0000000000
R13: 0000000000000058 R14: ffffc9000c87fc80 R15: 0000000000000246
 __memcg_slab_free_hook+0x9f/0x310 mm/memcontrol.c:3034
 memcg_slab_free_hook mm/slub.c:2182 [inline]
 slab_free mm/slub.c:4576 [inline]
 kmem_cache_free+0x234/0x420 mm/slub.c:4681
 task_work_run+0x24f/0x310 kernel/task_work.c:239
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f89a8f7e819
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:00007ffcf90808b8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 000000000006c9cd RCX: 00007f89a8f7e819
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f89a9137ba0 R08: 0000000000000001 R09: 00007ffcf9080baf
R10: 00007f89a8e00000 R11: 0000000000000246 R12: 000000000006ca14
R13: 00007f89a9135fa0 R14: 0000000000000032 R15: ffffffffffffffff
 </TASK>
rcu: rcu_preempt kthread starved for 10492 jiffies! g45569 f0x0 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:26064 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0x17fb/0x4be0 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6848
 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/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: 1 UID: 0 PID: 35 Comm: kworker/u8:2 Not tainted 6.12.0-syzkaller-09073-g9f16d5e6f220 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:get_current arch/x86/include/asm/current.h:49 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:216
Code: 8b 3d 94 12 9b 0c 48 89 de 5b e9 b3 a0 5b 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0c 25 80 d4 03 00 65 8b 15 b0 f4 6d 7e 81 e2 00 01 ff 00
RSP: 0018:ffffc90000ab76d8 EFLAGS: 00000202
RAX: ffffffff8189fb8b RBX: 1ffff110170c8c65 RCX: ffff8880202e8000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000ab78e0 R08: ffffffff8189fb5a R09: 1ffffffff2857110
R10: dffffc0000000000 R11: fffffbfff2857111 R12: dffffc0000000000
R13: ffff8880b8646328 R14: ffff8880b873f940 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555558dde808 CR3: 000000000e738000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 csd_lock_wait kernel/smp.c:340 [inline]
 smp_call_function_many_cond+0x1a0b/0x2ca0 kernel/smp.c:884
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1051
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:2114 [inline]
 text_poke_bp_batch+0x352/0xb30 arch/x86/kernel/alternative.c:2324
 text_poke_flush arch/x86/kernel/alternative.c:2515 [inline]
 text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2522
 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
 static_key_enable_cpuslocked+0x136/0x260 kernel/jump_label.c:210
 static_key_enable+0x1a/0x20 kernel/jump_label.c:223
 toggle_allocation_gate+0xbc/0x260 mm/kfence/core.c:849
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>