rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=990c/1/0x4000000000000000 softirq=11859/11859 fqs=2
rcu: 	(detected by 1, t=10506 jiffies, g=14797, q=128 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 18381 Comm: syz-executor425 Not tainted 6.8.0-rc1-syzkaller-00356-g8a696a29c690 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:__lock_acquire+0xedf/0x3b30 kernel/locking/lockdep.c:5107
Code: 48 f2 ff ff 48 63 5c 24 20 be 08 00 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 40 7f 15 92 e8 59 b8 77 00 48 0f a3 1d a1 3a ad 10 <0f> 82 0d fb ff ff 90 e8 d5 d0 fe 02 85 c0 74 3c 48 c7 c0 54 2e 3b
RSP: 0018:ffffc9000b55f800 EFLAGS: 00000047
RAX: 0000000000000001 RBX: 00000000000001de RCX: ffffffff81684497
RDX: fffffbfff242aff0 RSI: 0000000000000008 RDI: ffffffff92157f78
RBP: 0000000000000001 R08: 0000000000000000 R09: fffffbfff242afef
R10: ffffffff92157f7f R11: 0000000000000001 R12: ffff888065b5a8a8
R13: ffffed100cb6b50f R14: ffff888065b5a880 R15: 0000000000000002
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdf573bc9f8 CR3: 000000000cf78000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 lock_acquire kernel/locking/lockdep.c:5754 [inline]
 lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162
 vga_put+0x31/0x100 drivers/pci/vgaarb.c:547
 vga_arb_release+0x264/0x500 drivers/pci/vgaarb.c:1455
 __fput+0x270/0xb70 fs/file_table.c:376
 task_work_run+0x14d/0x240 kernel/task_work.c:180
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xa8a/0x2ad0 kernel/exit.c:871
 do_group_exit+0xd4/0x2a0 kernel/exit.c:1020
 get_signal+0x23b5/0x2790 kernel/signal.c:2893
 arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:105 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
 syscall_exit_to_user_mode+0x156/0x2b0 kernel/entry/common.c:212
 do_syscall_64+0xe0/0x250 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fdf57366369
Code: Unable to access opcode bytes at 0x7fdf5736633f.
RSP: 002b:00007fdf57327238 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fdf573f0308 RCX: 00007fdf57366369
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fdf573f0308
RBP: 00007fdf573f0300 R08: 00007fdf573276c0 R09: 00007fdf573276c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fdf573f030c
R13: 0000000000000000 R14: 00007ffea6475830 R15: 00007ffea6475918
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.893 msecs
rcu: rcu_preempt kthread starved for 10495 jiffies! g14797 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:27696 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0xf12/0x5c00 kernel/sched/core.c:6727
 __schedule_loop kernel/sched/core.c:6802 [inline]
 schedule+0xe9/0x270 kernel/sched/core.c:6817
 schedule_timeout+0x137/0x290 kernel/time/timer.c:2183
 rcu_gp_fqs_loop+0x1ec/0xb10 kernel/rcu/tree.c:1663
 rcu_gp_kthread+0x24b/0x380 kernel/rcu/tree.c:1862
 kthread+0x2c6/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 35 Comm: kworker/u4:2 Not tainted 6.8.0-rc1-syzkaller-00356-g8a696a29c690 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:__sanitizer_cov_trace_pc+0x34/0x60 kernel/kcov.c:207
Code: c2 03 00 65 8b 05 b4 9e 7b 7e a9 00 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74 35 8b 82 fc 15 00 00 85 c0 74 2b 8b 82 d8 15 00 00 <83> f8 02 75 20 48 8b 8a e0 15 00 00 8b 92 dc 15 00 00 48 8b 01 48
RSP: 0018:ffffc90000abf928 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8880b9844800 RCX: ffffffff817c5e68
RDX: ffff888015e9bb80 RSI: ffffffff817c5e42 RDI: 0000000000000005
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000006 R12: ffffed1017308901
R13: 0000000000000001 R14: ffff8880b9844808 R15: ffff8880b993de80
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000090 CR3: 000000000cf78000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 rep_nop arch/x86/include/asm/vdso/processor.h:13 [inline]
 cpu_relax arch/x86/include/asm/vdso/processor.h:18 [inline]
 csd_lock_wait kernel/smp.c:311 [inline]
 smp_call_function_many_cond+0x4e2/0x1550 kernel/smp.c:855
 on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1023
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:2087 [inline]
 text_poke_bp_batch+0x22b/0x750 arch/x86/kernel/alternative.c:2297
 text_poke_flush arch/x86/kernel/alternative.c:2488 [inline]
 text_poke_flush arch/x86/kernel/alternative.c:2485 [inline]
 text_poke_finish+0x30/0x40 arch/x86/kernel/alternative.c:2495
 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
 jump_label_update+0x1d7/0x400 kernel/jump_label.c:829
 static_key_enable_cpuslocked+0x1b7/0x270 kernel/jump_label.c:205
 static_key_enable+0x1a/0x20 kernel/jump_label.c:218
 toggle_allocation_gate mm/kfence/core.c:826 [inline]
 toggle_allocation_gate+0xf4/0x250 mm/kfence/core.c:818
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>