rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=66f4/1/0x4000000000000000 softirq=223504/223504 fqs=0
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P25260/1:b..l
rcu: 	(detected by 1, t=12365 jiffies, g=163417, q=109 ncpus=2)
task:syz.9.3703      state:R  running task     stack:28120 pid:25260 tgid:25259 ppid:22799  task_flags:0x400040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 preempt_schedule_irq+0x4d/0xa0
 irqentry_exit+0x14f/0x730
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:lock_acquire+0x221/0x350
Code: ff ff ff e8 21 95 06 0a f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 0b 40 97 11 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d 28 3e 92
RSP: 0018:ffffc90005fcf5d8 EFLAGS: 00000286
RAX: 75cd6560fc614600 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 000000000557c372 RSI: ffffffff8e218a58 RDI: ffffffff8c28ac60
RBP: ffffffff81770256 R08: ffffffff81770256 R09: ffffffff8e95cd60
R10: ffffc90005fcf738 R11: ffffffff81b0f840 R12: 0000000000000002
R13: ffffffff8e95cd60 R14: 0000000000000000 R15: 0000000000000246
 unwind_next_frame+0xc3/0x2550
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_noprof+0x2bc/0x650
 security_inode_alloc+0x39/0x310
 inode_init_always_gfp+0x9c8/0xda0
 alloc_inode+0x82/0x1b0
 new_inode+0x22/0x170
 __debugfs_create_file+0xb8/0x400
 debugfs_create_file_full+0x3f/0x60
 kvm_create_vm_debugfs+0x6ec/0x8f0
 kvm_dev_ioctl+0x11ce/0x1590
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8427b9cdd9
RSP: 002b:00007f8428ae6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f8427e15fa0 RCX: 00007f8427b9cdd9
RDX: 0000000000000001 RSI: 000000000000ae01 RDI: 0000000000000003
RBP: 00007f8427c32d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8427e16038 R14: 00007f8427e15fa0 R15: 00007ffd47e4aee8
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 12364 jiffies! g163417 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=35993
rcu: rcu_preempt kthread starved for 12365 jiffies! g163417 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27328 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 schedule+0x164/0x360
 schedule_timeout+0x158/0x2c0
 rcu_gp_fqs_loop+0x312/0x11d0
 rcu_gp_kthread+0x9e/0x2b0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 25242 Comm: syz.8.3699 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:preempt_schedule_irq+0x48/0xa0
Code: 49 be 00 00 00 00 00 fc ff df eb 09 48 f7 03 10 00 00 00 74 53 bf 01 00 00 00 e8 e3 5b ea f5 e8 8e 6e 24 f6 fb bf 01 00 00 00 <e8> 13 a3 ff ff 9c 58 fa a9 00 02 00 00 74 05 e8 54 70 24 f6 bf 01
RSP: 0018:ffffc9000958f3b0 EFLAGS: 00000202
RAX: 0000000000159167 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000007 RSI: ffffffff8dfa5c57 RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff9030a7f7 R09: 1ffffffff20614fe
R10: dffffc0000000000 R11: fffffbfff20614ff R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007fde4b11d6c0(0000) GS:ffff8882a9290000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000001067b2000 CR4: 0000000000352ef0
DR0: 00000000000000bb DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 irqentry_exit+0x14f/0x730
 asm_sysvec_call_function_single+0x1a/0x20
RIP: 0010:handle_ept_misconfig+0x94/0x3a0
Code: 04 20 84 c0 0f 85 9e 01 00 00 41 8b 2e bf ff ff ff ff 89 ee e8 ad f5 67 00 85 ed 0f 88 82 00 00 00 b8 00 24 00 00 41 0f 78 c6 <0f> 86 c0 01 00 00 e8 51 f1 67 00 4c 8d bb e0 02 00 00 4c 89 f8 48
RSP: 0018:ffffc9000958f4d8 EFLAGS: 00000202
RAX: 0000000000002400 RBX: ffff88811a74d380 RCX: 0000000000000002
RDX: ffff888118928000 RSI: 0000000000000000 RDI: 00000000ffffffff
RBP: 0000000000000000 R08: ffff888118928000 R09: 0000000000000007
R10: 0000000000000055 R11: 0000000000000002 R12: dffffc0000000000
R13: ffff88811a74d380 R14: 0000000000001050 R15: dffffc0000000000
 vmx_handle_exit+0xd70/0x16f0
 vcpu_run+0x5c77/0x7860
 kvm_arch_vcpu_ioctl_run+0x11e6/0x20d0
 kvm_vcpu_ioctl+0xa62/0xfd0
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fde4a19cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fde4b11d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fde4a415fa0 RCX: 00007fde4a19cdd9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007fde4a232d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fde4a416038 R14: 00007fde4a415fa0 R15: 00007ffe21166fe8
 </TASK>
