[Kernel-packages] [Bug 1780817] Re: kernel panic in nested VM with latest 4.15 kernel (4.15.0-24-generic)
I can confirm this, the issue showed up in 4.14. I have tried a number kernels from http://kernel.ubuntu.com/~kernel-ppa/mainline/, and found that somewhere between 4.13.16 and 4.14.0 this bug introduced itself. I am running a fresh install of Bionic, not an upgrade. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1780817 Title: kernel panic in nested VM with latest 4.15 kernel (4.15.0-24-generic) Status in linux package in Ubuntu: Triaged Status in linux source package in Bionic: Triaged Bug description: When starting a nested VM in a Bionic VM, the "host" VM kernel panics following a simple drop to QEMU monitor by hitting A-c. For some reason kdump is unable to capture the kernel panic so I only have a screen capture of the panic. It also happens on the latest mainline kernel(4.18-rc4). It is fairly trivial to reproduce. In a Bionic VM, install qemu & ovmf and run the following : qemu-system-x86_64 -enable-kvm \ -name balloontest \ -display none \ -monitor none \ -nographic \ -nodefaults \ -m 2048M \ -serial mon:stdio \ -smp 2 \ -cpu host \ -drive if=pflash,format=raw,readonly,file=/usr/share/OVMF/OVMF_CODE.fd \ -drive if=pflash,format=raw,file=/home/caribou/balloon/efi.vars Use A-c to drop to QEMU monitor and . ^[]0;/opt/ocs/gotty-serial/nolp-cli^G^[]2;Loading...^G^[]2;avogadro^G[ 267.784299] general protection fault: [#1] SMP PTI [ 267.785834] Modules linked in: nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo xt_addrtype ip6t_MASQUERADE nf_nat_masquerade_ipv6 ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_filter i> [ 267.804312] xor raid6_pq libcrc32c raid1 raid0 multipath linear floppy aesni_intel pata_acpi aes_x86_64 crypto_simd cryptd glue_helper psmouse i2c_piix4 virtio_net virtio_blk [ 267.807946] CPU: 6 PID: 0 Comm: swapper/6 Not tainted 4.15.0-24-generic #26-Ubuntu [ 267.809710] Hardware name: Scaleway Standard PC (i440FX + PIIX, 1996), BIOS 0.0.0 02/06/2015 [ 267.811666] RIP: 0010:native_write_cr4+0x4/0x10 [ 267.812727] RSP: 0018:8c01ffd83f48 EFLAGS: 00010006 [ 267.813960] RAX: 003626e0 RBX: 0046 RCX: 8c01ffd8 [ 267.815582] RDX: 8c01ffd94020 RSI: 8c01ffda5040 RDI: 003606e0 [ 267.817095] RBP: 8c01ffd83f48 R08: 00478079a547 R09: [ 267.818625] R10: R11: R12: 00025040 [ 267.820130] R13: 0001 R14: R15: [ 267.821638] FS: () GS:8c01ffd8() knlGS: [ 267.823352] CS: 0010 DS: ES: CR0: 80050033 [ 267.824592] CR2: CR3: 00058c00a006 CR4: 003626e0 [ 267.826108] DR0: DR1: DR2: [ 267.827567] DR3: DR6: fffe0ff0 DR7: 0400 [ 267.828973] Call Trace: [ 267.829470] [ 267.829893] hardware_disable+0xaa/0xc0 [kvm_intel] [ 267.830897] kvm_arch_hardware_disable+0x19/0x40 [kvm] [ 267.831928] hardware_disable_nolock+0x2b/0x30 [kvm] [ 267.832912] flush_smp_call_function_queue+0x4c/0xf0 [ 267.833911] generic_smp_call_function_single_interrupt+0x13/0x30 [ 267.835121] smp_call_function_interrupt+0x36/0xd0 [ 267.836069] call_function_interrupt+0x84/0x90 [ 267.836950] [ 267.837396] RIP: 0010:native_safe_halt+0x6/0x10 [ 267.838272] RSP: 0018:a2e1431afe80 EFLAGS: 0246 ORIG_RAX: ff03 [ 267.839698] RAX: acd97150 RBX: 0006 RCX: [ 267.840978] RDX: RSI: RDI: [ 267.842258] RBP: a2e1431afe80 R08: 0002 R09: [ 267.843554] R10: 00b3 R11: 00a6 R12: 0006 [ 267.844826] R13: R14: R15: [ 267.846107] ? __cpuidle_text_start+0x8/0x8 [ 267.846875] default_idle+0x20/0x100 [ 267.847533] arch_cpu_idle+0x15/0x20 [ 267.848186] default_idle_call+0x23/0x30 [ 267.848917] do_idle+0x172/0x1f0 [ 267.849516] cpu_startup_entry+0x73/0x80 [ 267.850255] start_secondary+0x1ab/0x200 [ 267.850971] secondary_startup_64+0xa5/0xb0 [ 267.851700] 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> [ 267.854894] RIP: native_write_cr4+0x4/0x10 RSP: 8c01ffd83f48 [ 268.848104] invalid o
[Kernel-packages] [Bug 1780817] Re: kernel panic in nested VM with latest 4.15 kernel (4.15.0-24-generic)
Tested with v4.19-rc4 mainline build, and the bug still exists. ** Tags added: kernel-bug-exists-upstream ** Changed in: linux (Ubuntu Bionic) Status: Triaged => Confirmed -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1780817 Title: kernel panic in nested VM with latest 4.15 kernel (4.15.0-24-generic) Status in linux package in Ubuntu: Triaged Status in linux source package in Bionic: Confirmed Bug description: When starting a nested VM in a Bionic VM, the "host" VM kernel panics following a simple drop to QEMU monitor by hitting A-c. For some reason kdump is unable to capture the kernel panic so I only have a screen capture of the panic. It also happens on the latest mainline kernel(4.18-rc4). It is fairly trivial to reproduce. In a Bionic VM, install qemu & ovmf and run the following : qemu-system-x86_64 -enable-kvm \ -name balloontest \ -display none \ -monitor none \ -nographic \ -nodefaults \ -m 2048M \ -serial mon:stdio \ -smp 2 \ -cpu host \ -drive if=pflash,format=raw,readonly,file=/usr/share/OVMF/OVMF_CODE.fd \ -drive if=pflash,format=raw,file=/home/caribou/balloon/efi.vars Use A-c to drop to QEMU monitor and . ^[]0;/opt/ocs/gotty-serial/nolp-cli^G^[]2;Loading...^G^[]2;avogadro^G[ 267.784299] general protection fault: [#1] SMP PTI [ 267.785834] Modules linked in: nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo xt_addrtype ip6t_MASQUERADE nf_nat_masquerade_ipv6 ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_filter i> [ 267.804312] xor raid6_pq libcrc32c raid1 raid0 multipath linear floppy aesni_intel pata_acpi aes_x86_64 crypto_simd cryptd glue_helper psmouse i2c_piix4 virtio_net virtio_blk [ 267.807946] CPU: 6 PID: 0 Comm: swapper/6 Not tainted 4.15.0-24-generic #26-Ubuntu [ 267.809710] Hardware name: Scaleway Standard PC (i440FX + PIIX, 1996), BIOS 0.0.0 02/06/2015 [ 267.811666] RIP: 0010:native_write_cr4+0x4/0x10 [ 267.812727] RSP: 0018:8c01ffd83f48 EFLAGS: 00010006 [ 267.813960] RAX: 003626e0 RBX: 0046 RCX: 8c01ffd8 [ 267.815582] RDX: 8c01ffd94020 RSI: 8c01ffda5040 RDI: 003606e0 [ 267.817095] RBP: 8c01ffd83f48 R08: 00478079a547 R09: [ 267.818625] R10: R11: R12: 00025040 [ 267.820130] R13: 0001 R14: R15: [ 267.821638] FS: () GS:8c01ffd8() knlGS: [ 267.823352] CS: 0010 DS: ES: CR0: 80050033 [ 267.824592] CR2: CR3: 00058c00a006 CR4: 003626e0 [ 267.826108] DR0: DR1: DR2: [ 267.827567] DR3: DR6: fffe0ff0 DR7: 0400 [ 267.828973] Call Trace: [ 267.829470] [ 267.829893] hardware_disable+0xaa/0xc0 [kvm_intel] [ 267.830897] kvm_arch_hardware_disable+0x19/0x40 [kvm] [ 267.831928] hardware_disable_nolock+0x2b/0x30 [kvm] [ 267.832912] flush_smp_call_function_queue+0x4c/0xf0 [ 267.833911] generic_smp_call_function_single_interrupt+0x13/0x30 [ 267.835121] smp_call_function_interrupt+0x36/0xd0 [ 267.836069] call_function_interrupt+0x84/0x90 [ 267.836950] [ 267.837396] RIP: 0010:native_safe_halt+0x6/0x10 [ 267.838272] RSP: 0018:a2e1431afe80 EFLAGS: 0246 ORIG_RAX: ff03 [ 267.839698] RAX: acd97150 RBX: 0006 RCX: [ 267.840978] RDX: RSI: RDI: [ 267.842258] RBP: a2e1431afe80 R08: 0002 R09: [ 267.843554] R10: 00b3 R11: 00a6 R12: 0006 [ 267.844826] R13: R14: R15: [ 267.846107] ? __cpuidle_text_start+0x8/0x8 [ 267.846875] default_idle+0x20/0x100 [ 267.847533] arch_cpu_idle+0x15/0x20 [ 267.848186] default_idle_call+0x23/0x30 [ 267.848917] do_idle+0x172/0x1f0 [ 267.849516] cpu_startup_entry+0x73/0x80 [ 267.850255] start_secondary+0x1ab/0x200 [ 267.850971] secondary_startup_64+0xa5/0xb0 [ 267.851700] 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> [ 267.854894] RIP: native_write_cr4+0x4/0x10 RSP: 8c01ffd83f48 [ 268.848104] invalid opcode: [#2] SMP PTI [ 268.848524] Modules linked in: nf_conntrack_netlink nfnet
