linux-image-4.7.0-0.bpo.1-amd64: Kernel panic after increase vCPU

– Package-specific info: Version: Linux version 4.7.0-0.bpo.1-amd64 (debian-kernel@lists.debian.org) (gcc version 4.9.2 (Debian 4.9.2-10) ) #1 SMP Debian 4.7.5-1~bpo8+2 (2016-10-01) Command line: BOOT_IMAGE=/boot/vmlinuz-4.7.0-0.bpo.1-amd64 root=UUID=708ef6ec-bb32-465f-8b9f-22a4ca07c982 ro quiet Not tainted Kernel log: [ 6.339604] systemd [1] : Started Forward Password Requests to Wall Directory Watch. [ 6.339615] systemd [1] : Expecting device dev-hvc0.device... [ 6.339643] systemd [1] : Starting Remote File Systems (Pre). [ 6.339651] systemd [1] : Reached target Remote File Systems (Pre). [ 6.339664] systemd [1] : Starting Dispatch Password Requests to Console Directory Watch. [ 6.339691] systemd [1] : Started Dispatch Password Requests to Console Directory Watch. [ 6.339700] systemd [1] : Starting Encrypted Volumes. [ 6.339708] systemd [1] : Reached target Encrypted Volumes. [ 6.339729] systemd [1] : Starting Arbitrary Executable File Formats File System Automount Point. [ 6.339817] systemd [1] : Set up automount Arbitrary Executable File Formats File System Automount Point. [ 6.339827] systemd [1] : Starting Swap. [ 6.339835] systemd [1] : Reached target Swap. [ 6.339842] systemd [1] : Starting Root Slice. [ 6.339862] systemd [1] : Created slice Root Slice. [ 6.339869] systemd [1] : Starting User and Session Slice. [ 6.339923] systemd [1] : Created slice User and Session Slice. [ 6.339933] systemd [1] : Starting Delayed Shutdown Socket. [ 6.339962] systemd [1] : Listening on Delayed Shutdown Socket. [ 6.339969] systemd [1] : Starting /dev/initctl Compatibility Named Pipe. [ 6.339996] systemd [1] : Listening on /dev/initctl Compatibility Named Pipe. [ 6.340041] systemd [1] : Starting Journal Socket (/dev/log). [ 6.340078] systemd [1] : Listening on Journal Socket (/dev/log). [ 6.340090] systemd [1] : Starting udev Control Socket. [ 6.340110] systemd [1] : Listening on udev Control Socket. [ 6.340120] systemd [1] : Starting udev Kernel Socket. [ 6.340140] systemd [1] : Listening on udev Kernel Socket. [ 6.340149] systemd [1] : Starting Journal Socket. [ 6.340176] systemd [1] : Listening on Journal Socket. [ 6.340203] systemd [1] : Starting System Slice. [ 6.340240] systemd [1] : Created slice System Slice. [ 6.340254] systemd [1] : Started File System Check on Root Device. [ 6.340260] systemd [1] : Starting system-getty.slice. [ 6.340308] systemd [1] : Created slice system-getty.slice. [ 6.340317] systemd [1] : Starting system-serial\x2dgetty.slice. [ 6.340350] systemd [1] : Created slice system-serial\x2dgetty.slice. [ 6.340373] systemd [1] : Starting Increase datagram queue length... [ 6.389150] systemd [1] : Started Set Up Additional Binary Formats. [ 6.389187] systemd [1] : Mounting POSIX Message Queue File System... [ 6.404135] systemd [1] : Mounting Huge Pages File System... [ 6.404611] systemd [1] : Mounting Debug File System... [ 6.405100] systemd [1] : Starting Create list of required static device nodes for the current kernel... [ 6.415831] systemd [1] : Starting Load Kernel Modules... [ 6.416396] systemd [1] : Starting udev Coldplug all Devices... [ 6.416773] systemd [1] : Starting Slices. [ 6.416786] systemd [1] : Reached target Slices. [ 6.478772] systemd [1] : Started Create list of required static device nodes for the current kernel. [ 6.479069] systemd [1] : Starting Create Static Device Nodes in /dev... [ 6.492681] systemd [1] : Started Load Kernel Modules. [ 6.492909] systemd [1] : Mounted Configuration File System. [ 6.492933] systemd [1] : Starting Apply Kernel Variables... [ 6.493465] systemd [1] : Mounted FUSE Control File System. [ 6.548644] systemd [1] : Started Apply Kernel Variables. [ 6.550606] systemd [1] : Started udev Coldplug all Devices. [ 6.621426] systemd [1] : Mounted Debug File System. [ 6.621479] systemd [1] : Mounted Huge Pages File System. [ 6.621497] systemd [1] : Mounted POSIX Message Queue File System. [ 6.621761] systemd [1] : Started Increase datagram queue length. [ 6.626617] systemd [1] : Starting Syslog Socket. [ 6.626675] systemd [1] : Listening on Syslog Socket. [ 6.626698] systemd [1] : Starting Journal Service... [ 6.652417] systemd [1] : Started Journal Service. [ 6.794421] systemd-udevd [242] : starting version 215 [ 7.283711] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input4 [ 7.283718] ACPI: Power Button [PWRF] [ 7.283787] input: Sleep Button as /devices/LNXSYSTM:00/LNXSLPBN:00/input/input5 [ 7.283790] ACPI: Sleep Button [SLPF] [ 7.295455] input: PC Speaker as /devices/platform/pcspkr/input/input6 [ 7.357922] piix4_smbus 0000:00:01.3: SMBus base address uninitialized - upgrade BIOS or use force_addr=0xaddr [ 7.381955] SSE version of gcm_enc/dec engaged. [ 7.402116] [drm] Initialized drm 1.1.0 20060810 [ 7.415100] alg: No test for fips(ansi_cprng) (fips_ansi_cprng) [ 7.478493] parport_pc 00:07: reported by Plug and Play ACPI [ 7.479190] parport0: PC-style at 0x378, irq 7 [PCSPP,TRISTATE] [ 7.488231] [drm] Found bochs VGA, ID 0xb0c4. [ 7.488236] [drm] Framebuffer size 8192 kB @ 0xf1000000, ioports @ 0x1ce. [ 7.488373] [TTM] Zone kernel: Available graphics memory: 4084750 kiB [ 7.488375] [TTM] Zone dma32: Available graphics memory: 2097152 kiB [ 7.488376] [TTM] Initializing pool allocator [ 7.488382] [TTM] Initializing DMA pool allocator [ 7.489090] fbcon: bochsdrmfb (fb0) is primary device [ 7.502487] ppdev: user-space parallel port driver [ 7.562535] Console: switching to colour frame buffer device 128x48 [ 7.564407] bochs-drm 0000:00:02.0: fb0: bochsdrmfb frame buffer device [ 7.588057] [drm] Initialized bochs-drm 1.0.0 20130925 for 0000:00:02.0 on minor 0 [ 7.973790] EXT4-fs (xvda1): re-mounted. Opts: errors=remount-ro [ 8.028943] systemd-journald [239] : Received request to flush runtime journal from PID 1 [ 12.750886] Netfilter messages via NETLINK v0.30. [ 12.792462] ip_set: protocol 6 [ 12.965101] ip_tables: (C) 2000-2006 Netfilter Core Team [ 12.980121] RPC: Registered named UNIX socket transport module. [ 12.980126] RPC: Registered udp transport module. [ 12.980128] RPC: Registered tcp transport module. [ 12.980129] RPC: Registered tcp NFSv4.1 backchannel transport module. [ 13.128079] FS-Cache: Loaded [ 13.176068] nf_conntrack version 0.5.0 (65536 buckets, 262144 max) [ 13.201394] FS-Cache: Netfs 'nfs' registered for caching [ 13.346242] Installing knfsd (copyright (C) 1996 okir@monad.swb.de). [ 13.369004] ip6_tables: (C) 2000-2006 Netfilter Core Team [ 14.133873] NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory [ 14.154031] NFSD: starting 90-second grace period (net ffffffff848e5b80) Model information sys_vendor: Xen product_name: HVM domU product_version: 4.6.1-xs128153 chassis_vendor: Xen chassis_version: bios_vendor: Xen bios_version: 4.6.1-xs128153 Loaded modules: xenfs xen_privcmd nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables nf_conntrack_ipv4 nfsd nf_defrag_ipv4 auth_rpcgss xt_tcpudp nfs_acl xt_limit xt_set xt_multiport xt_conntrack nfs nf_conntrack lockd grace fscache iptable_filter ip_tables sunrpc x_tables ip_set_hash_ipport ip_set nfnetlink joydev intel_powerclamp crct10dif_pclmul crc32_pclmul ghash_clmulni_intel hmac ppdev bochs_drm parport_pc drbg parport ttm evdev drm_kms_helper ansi_cprng drm aesni_intel i2c_piix4 aes_x86_64 acpi_cpufreq serio_raw lrw gf128mul glue_helper tpm_tis pcspkr ablk_helper tpm button cryptd autofs4 ext4 crc16 jbd2 mbcache hid_generic usbhid hid sg sr_mod cdrom ata_generic ata_piix libata uhci_hcd ehci_hcd xen_netfront xen_blkfront usbcore scsi_mod psmouse crc32c_intel usb_common floppy fjes PCI devices: 00:00.0 Host bridge [0600] : Intel Corporation 440FX - 82441FX PMC [Natoma] [8086:1237] (rev 02) Subsystem: Red Hat, Inc Qemu virtual machine [1af4:1100] Physical Slot: 0 Control: I/O- Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0 00:01.0 ISA bridge [0601] : Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II] [8086:7000] Subsystem: Red Hat, Inc Qemu virtual machine [1af4:1100] Physical Slot: 1 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0 00:01.1 IDE interface [0101] : Intel Corporation 82371SB PIIX3 IDE [Natoma/Triton II] [8086:7010] (prog-if 80 [Master] ) Subsystem: XenSource, Inc. Device [5853:0001] Physical Slot: 1 Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 64 Region 0: [virtual] Memory at 000001f0 (32-bit, non-prefetchable) [size=8] Region 1: [virtual] Memory at 000003f0 (type 3, non-prefetchable) Region 2: [virtual] Memory at 00000170 (32-bit, non-prefetchable) [size=8] Region 3: [virtual] Memory at 00000370 (type 3, non-prefetchable) Region 4: I/O ports at c320 [size=16] Kernel driver in use: ata_piix 00:01.2 USB controller [0c03] : Intel Corporation 82371SB PIIX3 USB [Natoma/Triton II] [8086:7020] (rev 01) (prog-if 00 [UHCI] ) Subsystem: XenSource, Inc. Device [5853:0001] Physical Slot: 1 Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 64 Interrupt: pin D routed to IRQ 23 Region 4: I/O ports at c300 [size=32] Kernel driver in use: uhci_hcd 00:01.3 Bridge [0680] : Intel Corporation 82371AB/EB/MB PIIX4 ACPI [8086:7113] (rev 01) Subsystem: Red Hat, Inc Qemu virtual machine [1af4:1100] Physical Slot: 1 Control: I/O- Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0 Interrupt: pin A routed to IRQ 9 00:02.0 VGA compatible controller [0300] : Device [1234:1111] (prog-if 00 [VGA controller] ) Subsystem: XenSource, Inc. Device [5853:0001] Physical Slot: 2 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0 Region 0: Memory at f1000000 (32-bit, prefetchable) [size=8M] [virtual] Expansion ROM at 000c0000 [disabled] [size=128K] Kernel driver in use: bochs-drm 00:03.0 SCSI storage controller [0100] : XenSource, Inc. Xen Platform Device [5853:0001] (rev 02) Subsystem: XenSource, Inc. Xen Platform Device [5853:0001] Physical Slot: 3 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0 Interrupt: pin C routed to IRQ 30 Region 0: I/O ports at c000 [size=256] Region 1: Memory at f0000000 (32-bit, prefetchable) [size=16M] Kernel driver in use: xen-platform-pci USB devices: Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub – System Information: Debian Release: 8.6 APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'stable') Architecture: amd64 (x86_64) Kernel: Linux 4.7.0-0.bpo.1-amd64 (SMP w/8 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages linux-image-4.7.0-0.bpo.1-amd64 depends on: ii initramfs-tools [linux-initramfs-tool] 0.120+deb8u2 ii kmod 18-3 ii linux-base 4.3~bpo8+1 Versions of packages linux-image-4.7.0-0.bpo.1-amd64 recommends: ii firmware-linux-free 3.3 ii irqbalance 1.1.0-2~bpo8+1 Versions of packages linux-image-4.7.0-0.bpo.1-amd64 suggests: pn debian-kernel-handbook <none> ii grub-pc 2.02~beta2-22+deb8u1 pn linux-doc-4.7 <none> Versions of packages linux-image-4.7.0-0.bpo.1-amd64 is related to: pn firmware-amd-graphics <none> pn firmware-atheros <none> pn firmware-bnx2 <none> pn firmware-bnx2x <none> pn firmware-brcm80211 <none> pn firmware-cavium <none> pn firmware-intel-sound <none> pn firmware-intelwimax <none> pn firmware-ipw2x00 <none> pn firmware-ivtv <none> pn firmware-iwlwifi <none> pn firmware-libertas <none> pn firmware-linux-nonfree <none> pn firmware-misc-nonfree <none> pn firmware-myricom <none> pn firmware-netxen <none> pn firmware-qlogic <none> pn firmware-realtek <none> pn firmware-samsung <none> pn firmware-siano <none> pn firmware-ti-connectivity <none> pn xen-hypervisor <none> – no debconf information