The problem is there with 4.17-rc6
ompute2 login: [ 5290.132368] general protection fault: 0000 [#1] SMP PTI
[ 5290.133501] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel ebt_arp
ebt_among ip6table_raw nf_conntrack_ipv6 nf_defrag_ipv6 xt_CT xt_mac xt_comment
xt_physdev vhost_net vhost tap xt_CHECKSUM iptable_mangle ipt_MASQUERADE
nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4
nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp
kvm_intel ip6table_filter ip6_tables iptable_filter ebtable_filter ebtable_nat
ebtables iptable_raw br_netfilter bridge stp llc nls_iso8859_1 kvm irqbypass
joydev input_leds mac_hid serio_raw qemu_fw_cfg sch_fq_codel ib_iser rdma_cm
iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi
ip_tables x_tables autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov
async_memcpy async_pq async_xor async_tx xor raid6_pq
[ 5290.153839] libcrc32c raid1 raid0 multipath linear crct10dif_pclmul
hid_generic crc32_pclmul ghash_clmulni_intel pcbc aesni_intel usbhid aes_x86_64
crypto_simd cryptd glue_helper cirrus ttm hid drm_kms_helper psmouse
syscopyarea sysfillrect sysimgblt fb_sys_fops virtio_blk virtio_net drm
i2c_piix4 floppy pata_acpi [last unloaded: kvm_intel]
[ 5290.162975] CPU: 0 PID: 13660 Comm: CPU 0/KVM Not tainted
4.17.0-041700rc6-generic #201805202330
[ 5290.165690] Hardware name: OpenStack Foundation OpenStack Nova, BIOS
1.10.2-1ubuntu1~cloud0 04/01/2014
[ 5290.168450] RIP: 0010:native_write_cr4+0x4/0x10
[ 5290.169847] RSP: 0018:ffffc0028128bb70 EFLAGS: 00010006
[ 5290.171383] RAX: 00000000000626f0 RBX: 0000000000000046 RCX: ffff9b6b3fc00000
[ 5290.173624] RDX: ffff9b6b3fc14020 RSI: ffff9b6b3fc25040 RDI: 00000000000606f0
[ 5290.175694] RBP: ffffc0028128bb70 R08: 0000000000027040 R09: ffffffff82bb9eb9
[ 5290.177778] R10: fffffa1988bb2a00 R11: 0000000000000048 R12: 0000000000025040
[ 5290.179295] R13: 0000000000000000 R14: ffff9b6b31ec09a0 R15: ffff9b6b31ed5270
[ 5290.180780] FS: 00007fc542763700(0000) GS:ffff9b6b3fc00000(0000)
knlGS:0000000000000000
[ 5290.183096] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 5290.184583] CR2: 00007fc53380cd50 CR3: 0000000193a0a003 CR4: 00000000000626f0
[ 5290.186146] Call Trace:
[ 5290.186753] hardware_disable+0xaa/0xc0 [kvm_intel]
[ 5290.188150] ? vcpu_stat_get_per_vm_open+0x20/0x20 [kvm]
[ 5290.190099] kvm_arch_hardware_disable+0x19/0x40 [kvm]
[ 5290.191639] hardware_disable_nolock+0x2b/0x30 [kvm]
[ 5290.193253] on_each_cpu+0x46/0x60
[ 5290.194075] hardware_disable_all_nolock+0x35/0x40 [kvm]
[ 5290.195800] hardware_disable_all+0x1a/0x30 [kvm]
[ 5290.197091] kvm_put_kvm+0x203/0x260 [kvm]
[ 5290.198370] kvm_vm_release+0x21/0x30 [kvm]
[ 5290.199481] __fput+0xea/0x220
[ 5290.200445] ____fput+0xe/0x10
[ 5290.201442] task_work_run+0x9d/0xc0
[ 5290.202547] do_exit+0x2ec/0xb50
[ 5290.203640] do_group_exit+0x43/0xb0
[ 5290.204677] get_signal+0x27f/0x5c0
[ 5290.205368] do_signal+0x37/0x730
[ 5290.206005] ? do_futex+0x325/0x500
[ 5290.206774] exit_to_usermode_loop+0x8a/0xd0
[ 5290.207664] do_syscall_64+0xfb/0x120
[ 5290.208345] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 5290.209667] RIP: 0033:0x7fc54d01d10d
[ 5290.212016] RSP: 002b:00007fc542762798 EFLAGS: 00000246 ORIG_RAX:
00000000000000ca
[ 5290.215475] RAX: fffffffffffffe00 RBX: 0000562fd279c0d0 RCX: 00007fc54d01d10d
[ 5290.219910] RDX: 0000000000000002 RSI: 0000000000000080 RDI: 0000562fd150fe00
[ 5290.224956] RBP: 0000562fd279c0f4 R08: 0000562fd150fe00 R09: 0000000000000000
[ 5290.227944] R10: 0000000000000000 R11: 0000000000000246 R12: 0000562fd279c0fc
[ 5290.231168] R13: 0000000000000000 R14: 0000562fd150fe00 R15: 000000000000000f
[ 5290.234173] Code: 0f 1f 80 00 00 00 00 55 48 89 e5 0f 20 d8 5d c3 0f 1f 80
00 00 00 00 55 48 89 e5 0f 22 df 5d c3 0f 1f 80 00 00 00 00 55 48 89 e5 <0f> 22
e7 5d c3 0f 1f 80 00 00 00 00 55 48 89 e5 44 0f 20 c0 5d
[ 5290.241264] RIP: native_write_cr4+0x4/0x10 RSP: ffffc0028128bb70
[ 5290.244693] ---[ end trace b9a4c634f5e30633 ]---
[ 5290.247044] Fixing recursive fault but reboot is needed!
[ 5290.807745] general protection fault: 0000 [#2] SMP PTI
[ 5290.810795] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel ebt_arp
ebt_among ip6table_raw nf_conntrack_ipv6 nf_defrag_ipv6 xt_CT xt_mac xt_comment
xt_physdev vhost_net vhost tap xt_CHECKSUM iptable_mangle ipt_MASQUERADE
nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4
nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp
kvm_intel ip6table_filter ip6_tables iptable_filter ebtable_filter ebtable_nat
ebtables iptable_raw br_netfilter bridge stp llc nls_iso8859_1 kvm irqbypass
joydev input_leds mac_hid serio_raw qemu_fw_cfg sch_fq_codel ib_iser rdma_cm
iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi
ip_tables x_tables autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov
async_memcpy async_pq async_xor async_tx xor raid6_pq
[ 5290.839539] libcrc32c raid1 raid0 multipath linear crct10dif_pclmul
hid_generic crc32_pclmul ghash_clmulni_intel pcbc aesni_intel usbhid aes_x86_64
crypto_simd cryptd glue_helper cirrus ttm hid drm_kms_helper psmouse
syscopyarea sysfillrect sysimgblt fb_sys_fops virtio_blk virtio_net drm
i2c_piix4 floppy pata_acpi [last unloaded: kvm_intel]
[ 5290.852173] CPU: 0 PID: 13797 Comm: neutron-rootwra Tainted: G D
4.17.0-041700rc6-generic #201805202330
[ 5290.856753] Hardware name: OpenStack Foundation OpenStack Nova, BIOS
1.10.2-1ubuntu1~cloud0 04/01/2014
[ 5290.860945] RIP: 0010:native_flush_tlb_global+0x88/0xa0
[ 5290.864045] RSP: 0000:ffff9b6b3fc03f50 EFLAGS: 00010002
[ 5290.867202] RAX: 00000000000606f0 RBX: ffff9b6b3fc289e0 RCX: ffff9b6b3fc289e0
[ 5290.870850] RDX: 0000000000060670 RSI: 0000000000000000 RDI: 0000000000000046
[ 5290.874559] RBP: ffff9b6b3fc03f80 R08: 0000000000000000 R09: 0000000000000000
[ 5290.878231] R10: ffff9b6b3fc03f98 R11: 0000000000000000 R12: 0000000000000000
[ 5290.881946] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000
[ 5290.885615] FS: 00007f3442be7740(0000) GS:ffff9b6b3fc00000(0000)
knlGS:0000000000000000
[ 5290.889550] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 5290.893088] CR2: 00007f343f080024 CR3: 0000000232c8e002 CR4: 00000000000626f0
[ 5290.896681] Call Trace:
[ 5290.898966] <IRQ>
[ 5290.901135] ? handle_irq_event+0x46/0x60
[ 5290.903801] do_flush_tlb_all+0x23/0x30
[ 5290.906498] ? do_flush_tlb_all+0x23/0x30
[ 5290.909306] flush_smp_call_function_queue+0x4c/0xf0
[ 5290.912347] generic_smp_call_function_single_interrupt+0x13/0x30
[ 5290.915749] smp_call_function_interrupt+0x36/0xd0
[ 5290.918749] call_function_interrupt+0xf/0x20
[ 5290.921729] </IRQ>
[ 5290.924464] RIP: 0033:0x55a4edb369b4
[ 5290.927715] RSP: 002b:00007fff10157060 EFLAGS: 00000206 ORIG_RAX:
ffffffffffffff03
[ 5290.932014] RAX: 00000000400e55eb RBX: 00000000400e55eb RCX: 000055a4edab7700
[ 5290.936118] RDX: 0000000000000003 RSI: 00000000400667fb RDI: 0000000000000000
[ 5290.940008] RBP: 0000000000000000 R08: 000055a4edab6b90 R09: 000055a4edf7c2a0
[ 5290.943734] R10: 000055a4edf81980 R11: 000055a4edb49230 R12: 000055a4f03b3880
[ 5290.947453] R13: 00007f343f0ecec0 R14: 0000000000000004 R15: 0000000000000030
[ 5290.951566] Code: 48 83 c4 28 41 5a 5d 49 8d 62 f8 c3 9c 58 66 66 90 66 90
48 89 c7 fa 66 66 90 66 66 90 65 48 8b 05 be 67 db 7d 48 89 c2 80 f2 80 <0f> 22
e2 0f 22 e0 57 9d 66 66 90 66 90 eb b7 e8 c4 0c 02 00 0f
[ 5290.962119] RIP: native_flush_tlb_global+0x88/0xa0 RSP: ffff9b6b3fc03f50
[ 5290.965686] ---[ end trace b9a4c634f5e30634 ]---
[ 5290.968643] Kernel panic - not syncing: Fatal exception in interrupt
[ 5290.972680] Kernel Offset: 0x1200000 from 0xffffffff81000000 (relocation
range: 0xffffffff80000000-0xffffffffbfffffff)
** Tags added: kernel-bug-exists-upstream
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1773184
Title:
Starting a KVM guest in a guest (nested VM) crash the kernel
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