rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (3 ticks this GP) idle=2f84/1/0x4000000000000000 softirq=49722/49722 fqs=894
rcu: 	(detected by 0, t=10502 jiffies, g=69381, q=1723 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 12268 Comm: syz-executor Not tainted 6.10.0-rc7-syzkaller-00139-g425652d45c31 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:__raw_callee_save___pv_queued_spin_unlock+0x10/0x18
Code: 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 52 b8 01 00 00 00 31 d2 f0 0f b0 17 <75> 06 5a c3 cc cc cc cc 56 0f b6 f0 e8 9f ff ff ff 5e 5a c3 cc cc
RSP: 0018:ffffc90000a18c50 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 1ffff110172a5911 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880b952c880
RBP: dffffc0000000000 R08: ffff8880b952c883 R09: 1ffff110172a5910
R10: dffffc0000000000 R11: ffffed10172a5911 R12: 1ffff110172a5912
R13: ffff8880b952c890 R14: ffff8880b952c888 R15: ffff8880b952c880
FS:  000055555e23a500(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2a8de17ec2 CR3: 000000006f2fc000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 pv_queued_spin_unlock arch/x86/include/asm/paravirt.h:589 [inline]
 queued_spin_unlock arch/x86/include/asm/qspinlock.h:57 [inline]
 do_raw_spin_unlock+0x13c/0x8b0 kernel/locking/spinlock_debug.c:142
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:150 [inline]
 _raw_spin_unlock_irqrestore+0x81/0x140 kernel/locking/spinlock.c:194
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x477/0xd50 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+0x110/0x3f0 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:kmalloc_node_track_caller_noprof+0x5/0x440 mm/slub.c:4142
Code: ff ff f3 0f 1e fa 31 c0 e9 9b fd ff ff 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 <41> 57 41 56 41 55 41 54 53 48 83 ec 20 48 89 0c 24 41 89 d6 41 89
RSP: 0018:ffffc90008d2fc90 EFLAGS: 00000293
RAX: ffffffff81da8cb6 RBX: 0000000000000cc0 RCX: ffffffff81da740c
RDX: 00000000ffffffff RSI: 0000000000000cc0 RDI: 0000000000000014
RBP: ffffc90008d2fd90 R08: ffffffff81da73f1 R09: 1ffff1100fa2c76e
R10: dffffc0000000000 R11: ffffed100fa2c76f R12: 0000000000000014
R13: ffff888062ff9bc0 R14: ffff88802bdfb320 R15: 0000000000000014
 kmemdup_noprof+0x2a/0x60 mm/util.c:131
 shmem_symlink+0x22c/0x6a0 mm/shmem.c:3531
 vfs_symlink+0x137/0x2e0 fs/namei.c:4495
 do_symlinkat+0x222/0x3a0 fs/namei.c:4521
 __do_sys_symlinkat fs/namei.c:4537 [inline]
 __se_sys_symlinkat fs/namei.c:4534 [inline]
 __x64_sys_symlinkat+0x99/0xb0 fs/namei.c:4534
 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: 0033:0x7f2a8dd751f7
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 0a 01 00 00 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:00007ffe630b1b68 EFLAGS: 00000202 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2a8dd751f7
RDX: 00007f2a8dde4af7 RSI: 00000000ffffff9c RDI: 00007ffe630b1c30
RBP: 0000000000000001 R08: 0000000000000013 R09: 00007ffe630b18b7
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffe630b1c30
R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffe630b1c30
 </TASK>
rcu: rcu_preempt kthread starved for 8706 jiffies! g69381 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:26576 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a20 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/0x1330 kernel/rcu/tree.c:2000
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2202
 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: 0 PID: 5331 Comm: kworker/u8:18 Not tainted 6.10.0-rc7-syzkaller-00139-g425652d45c31 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:smp_call_function_many_cond+0x1878/0x29d0 kernel/smp.c:855
Code: 00 00 00 00 fc ff df 75 07 e8 74 08 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 58 08 0c 00 <eb> e4 44 89 e9 80 e1 07 80 c1 03 38 c1 7c e2 4c 89 ef e8 01 ce 71
RSP: 0018:ffffc9000904f700 EFLAGS: 00000293
RAX: ffffffff818a1fc8 RBX: 1ffff110172a8899 RCX: ffff888020d63c00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000904f8e0 R08: ffffffff818a1f97 R09: 1ffffffff25f5ab0
R10: dffffc0000000000 R11: fffffbfff25f5ab1 R12: dffffc0000000000
R13: ffff8880b95444c8 R14: ffff8880b943f8c0 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc1c003c02f CR3: 000000000e132000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1023
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:2069 [inline]
 text_poke_bp_batch+0x352/0xb30 arch/x86/kernel/alternative.c:2279
 text_poke_flush arch/x86/kernel/alternative.c:2470 [inline]
 text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2477
 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
 static_key_enable_cpuslocked+0x136/0x260 kernel/jump_label.c:205
 static_key_enable+0x1a/0x20 kernel/jump_label.c:218
 toggle_allocation_gate+0xb5/0x250 mm/kfence/core.c:826
 process_one_work kernel/workqueue.c:3248 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329
 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409
 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>