9pnet_virtio: no channels available for device ]system-./
BUG: unable to handle kernel paging request at ffffc9000bfff878
PGD 1da95a067 P4D 1da95a067 PUD 1da95b067 PMD 1b5595067 PTE 0
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 17553 Comm: syz-executor2 Not tainted 4.20.0-rc7+ #161
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:init_srcu_struct_nodes kernel/rcu/srcutree.c:161 [inline]
RIP: 0010:init_srcu_struct_fields+0xd03/0x1470 kernel/rcu/srcutree.c:191
Code: 88 00 00 00 48 89 f8 48 c1 e8 03 0f b6 04 18 84 c0 74 08 3c 03 0f 8e 0a 04 00 00 49 8d be 98 01 00 00 44 89 e1 b8 01 00 00 00 <41> 2b 8d 88 00 00 00 48 89 fa 48 c1 ea 03 d3 e0 80 3c 1a 00 48 98
RSP: 0018:ffff8881b270f618 EFLAGS: 00010246
RAX: 0000000000000001 RBX: dffffc0000000000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8881daf00198
RBP: ffff8881b270f7f8 R08: ffff8881b9c8e700 R09: 0000000000000000
R10: ffffed103b5c5b5f R11: ffff8881dae2dafb R12: 0000000000000001
R13: ffffc9000bfff7f0 R14: ffff8881daf00000 R15: ffff8881daf000f0
FS:  00007f3704beb700(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc9000bfff878 CR3: 00000001c18c1000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 __init_srcu_struct+0x54/0x60 kernel/rcu/srcutree.c:207
 kvm_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:669 [inline]
 kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:3197 [inline]
 kvm_dev_ioctl+0x10b2/0x1ae0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3249
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:509 [inline]
 do_vfs_ioctl+0x1de/0x1790 fs/ioctl.c:696
 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:713
 __do_sys_ioctl fs/ioctl.c:720 [inline]
 __se_sys_ioctl fs/ioctl.c:718 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457669
Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f3704beac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457669
RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000006
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3704beb6d4
R13: 00000000004c0115 R14: 00000000004d1188 R15: 00000000ffffffff
Modules linked in:
CR2: ffffc9000bfff878
---[ end trace ad9ceffd6bd94a53 ]---
RIP: 0010:init_srcu_struct_nodes kernel/rcu/srcutree.c:161 [inline]
RIP: 0010:init_srcu_struct_fields+0xd03/0x1470 kernel/rcu/srcutree.c:191
Code: 88 00 00 00 48 89 f8 48 c1 e8 03 0f b6 04 18 84 c0 74 08 3c 03 0f 8e 0a 04 00 00 49 8d be 98 01 00 00 44 89 e1 b8 01 00 00 00 <41> 2b 8d 88 00 00 00 48 89 fa 48 c1 ea 03 d3 e0 80 3c 1a 00 48 98
RSP: 0018:ffff8881b270f618 EFLAGS: 00010246
RAX: 0000000000000001 RBX: dffffc0000000000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8881daf00198
RBP: ffff8881b270f7f8 R08: ffff8881b9c8e700 R09: 0000000000000000
R10: ffffed103b5c5b5f R11: ffff8881dae2dafb R12: 0000000000000001
R13: ffffc9000bfff7f0 R14: ffff8881daf00000 R15: ffff8881daf000f0
FS:  00007f3704beb700(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc9000bfff878 CR3: 00000001c18c1000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600