rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 ticks this GP) idle=04ac/1/0x4000000000000000 softirq=80818/80840 fqs=0
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P12462/1:b..l
rcu: 	(detected by 0, t=15485 jiffies, g=60089, q=214 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 12467 Comm: syz.2.1633 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:kvm_get_bus_srcu+0x1/0x130
Code: 00 48 8b 54 24 28 e9 24 fd ff ff 66 66 66 66 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 55 <41> 57 41 56 53 89 f5 49 89 fe e8 d0 34 87 00 4d 8d be 68 0b 00 00
RSP: 0018:ffffc9000876f3b0 EFLAGS: 00000246
RAX: 1ffff11022c30000 RBX: 0000000000000003 RCX: 0000000000080000
RDX: ffffc90008b61000 RSI: 0000000000000003 RDI: ffff8881151b8000
RBP: ffffc9000876f4c8 R08: 0000000000000000 R09: 0000000000000007
R10: 0000000000000055 R11: 0000000000000002 R12: 1ffff920010ede84
R13: ffff888116180000 R14: dffffc0000000000 R15: ffff888116180000
FS:  00007f0180c026c0(0000) GS:ffff8882a9290000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000011039a000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000007 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kvm_io_bus_write+0xb5/0x5f0
 handle_ept_misconfig+0xe3/0x3a0
 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: 0033:0x7f017fd9cdd9
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:00007f0180c02028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f0180015fa0 RCX: 00007f017fd9cdd9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007f017fe32d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0180016038 R14: 00007f0180015fa0 R15: 00007ffd66b8d6c8
 </TASK>
task:syz.1.1632      state:R  running task     stack:24408 pid:12462 tgid:12462 ppid:5595   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:ffffc9000886f578 EFLAGS: 00000286
RAX: 153cc6d6929ace00 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 000000005a44979c RSI: ffffffff8e218a58 RDI: ffffffff8c28ac60
RBP: ffffffff81770256 R08: ffffffff81770256 R09: ffffffff8e95cd60
R10: ffffc9000886f6d8 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_stack+0x3e/0x60
 kasan_record_aux_stack+0xbd/0xd0
 call_rcu+0xee/0x890
 __destroy_inode+0x2b2/0x640
 evict+0x8a7/0xb10
 __dentry_kill+0x1a2/0x690
 finish_dput+0xc9/0x480
 debugfs_remove+0x5b/0x70
 kvm_put_kvm+0x13e/0xa50
 kvm_vm_release+0x43/0x50
 __fput+0x44f/0xa60
 task_work_run+0x1d9/0x270
 exit_to_user_mode_loop+0xed/0x480
 do_syscall_64+0x33e/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6a39d9cdd9
RSP: 002b:00007ffe54a5cb68 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f6a3a017da0 RCX: 00007f6a39d9cdd9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f6a3a017da0 R08: 0000000000000006 R09: 0000000000000000
R10: 000000000003fd48 R11: 0000000000000246 R12: 000000000004c9ac
R13: 00007f6a3a015fac R14: 000000000004c720 R15: 00007f6a3a015fa0
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 15484 jiffies! g60089 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=13614
rcu: rcu_preempt kthread starved for 15485 jiffies! g60089 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27544 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: 0 UID: 0 PID: 5592 Comm: syz-executor 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:vm_normal_page+0x3b/0x280
Code: d7 48 89 34 24 49 89 fd e8 22 91 af ff 31 ff 4c 89 fe e8 f8 95 af ff 4d 85 ff 0f 95 c3 4c 89 fe 48 83 e6 01 40 0f 94 c5 31 ff <e8> e0 95 af ff 40 20 dd 44 0f b6 f5 49 f7 de 4d 31 fe 49 c1 ee 0c
RSP: 0018:ffffc900046e7360 EFLAGS: 00000246
RAX: ffffffff82163b28 RBX: ffff8881133e8a01 RCX: ffff8881767cca00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900046e7600 R08: ffffea00007fd2f3 R09: 1ffffd40000ffa5e
R10: dffffc0000000000 R11: fffff940000ffa5f R12: ffff888115719880
R13: ffff88811668d640 R14: ffffc900046e7880 R15: 800000001ff4c027
FS:  0000000000000000(0000) GS:ffff88818dc90000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000011554c000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000007 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __zap_vma_range+0x1098/0x4b40
 unmap_vmas+0x379/0x530
 exit_mmap+0x280/0x9e0
 __mmput+0x118/0x430
 exit_mm+0x18e/0x250
 do_exit+0x6a2/0x22c0
 do_group_exit+0x21b/0x2d0
 get_signal+0x1284/0x1330
 arch_do_signal_or_restart+0xbc/0x830
 exit_to_user_mode_loop+0x86/0x480
 do_syscall_64+0x33e/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5da3157f57
Code: Unable to access opcode bytes at 0x7f5da3157f2d.
RSP: 002b:00007ffd581b36d0 EFLAGS: 00000202 ORIG_RAX: 000000000000003d
RAX: fffffffffffffe00 RBX: 000055557f5c6500 RCX: 00007f5da3157f57
RDX: 0000000040000000 RSI: 00007ffd581b372c RDI: ffffffffffffffff
RBP: 00007ffd581b372c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000008
R13: 0000000000000003 R14: 00007ffd581b3988 R15: 0000000000000000
 </TASK>
