ooting the kernel.
[    0.000000] Linux version 4.19.0+ (syzkaller@ci) (gcc version 8.0.1 20180413 (experimental) (GCC)) #88 SMP PREEMPT Tue Oct 30 13:04:03 UTC 2018
[    0.000000] Command line: BOOT_IMAGE=/vmlinuz root=/dev/sda1 console=ttyS0 earlyprintk=serial vsyscall=native rodata=n oops=panic panic_on_warn=1 nmi_watchdog=panic panic=86400 security=smack ima_policy=tcb workqueue.watchdog_thresh=140 kvm-intel.nested=1 nf-conntrack-ftp.ports=20000 nf-conntrack-tftp.ports=20000 nf-conntrack-sip.ports=20000 nf-conntrack-irc.ports=20000 nf-conntrack-sane.ports=20000 nopcid
[    0.000000] KERNEL supported cpus:
[    0.000000]   Intel GenuineIntel
[    0.000000]   AMD AuthenticAMD
[    0.000000]   Centaur CentaurHauls
[    0.000000] x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'
[    0.000000] x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
[    0.000000] x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'
[    0.000000] x86/fpu: xstate_offset[2]:  576, xstate_sizes[2]:  256
[    0.000000] x86/fpu: Enabled xstate features 0x7, context size is 832 bytes, using 'standard' format.
[    0.000000] BIOS-provided physical RAM map:
[    0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usable
[    0.000000] BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000000f0000-0x00000000000fffff] reserved
[    0.000000] BIOS-e820: [mem 0x0000000000100000-0x00000000bfffcfff] usable
[    0.000000] BIOS-e820: [mem 0x00000000bfffd000-0x00000000bfffffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000fffbc000-0x00000000ffffffff] reserved
[    0.000000] BIOS-e820: [mem 0x0000000100000000-0x000000021fffffff] usable
[    0.000000] printk: bootconsole [earlyser0] enabled
[    0.000000] Malformed early option 'vsyscall'
[    0.000000] nopcid: PCID feature disabled
[    0.000000] NX (Execute Disable) protection: active
[    0.000000] SMBIOS 2.4 present.
[    0.000000] DMI: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[    0.000000] Hypervisor detected: KVM
[    0.000000] kvm-clock: Using msrs 4b564d01 and 4b564d00
[    0.000004] kvm-clock: cpu 0, msr a518001, primary cpu clock
[    0.000004] kvm-clock: using sched offset of 4497621490 cycles
[    0.000795] clocksource: kvm-clock: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns
[    0.003083] tsc: Detected 2300.000 MHz processor
[    0.006529] last_pfn = 0x220000 max_arch_pfn = 0x400000000
[    0.007496] x86/PAT: Configuration [0-7]: WB  WC  UC- UC  WB  WP  UC- WT  
[    0.008522] last_pfn = 0xbfffd max_arch_pfn = 0x400000000
[    0.013212] found SMP MP-table at [mem 0x000f2c60-0x000f2c6f] mapped at [(____ptrval____)]
[    0.014713] check: Scanning 1 areas for low memory corruption
[    0.015593] Using GB pages for direct mapping
[    0.018354] ACPI: Early table checksum verification disabled
[    0.019381] ACPI: RSDP 0x00000000000F2A30 000014 (v00 Google)
[    0.020155] ACPI: RSDT 0x00000000BFFFDBA0 000038 (v01 Google GOOGRSDT 00000001 GOOG 00000001)
[    0.021396] ACPI: FACP 0x00000000BFFFFF00 0000F4 (v02 Google GOOGFACP 00000001 GOOG 00000001)
[    0.022617] ACPI: DSDT 0x00000000BFFFDBE0 0017B2 (v01 Google GOOGDSDT 00000001 GOOG 00000001)
[    0.023814] ACPI: FACS 0x00000000BFFFFEC0 000040
[    0.024495] ACPI: FACS 0x00000000BFFFFEC0 000040
[    0.025133] ACPI: SSDT 0x00000000BFFFF590 000930 (v01 Google GOOGSSDT 00000001 GOOG 00000001)
[    0.026532] ACPI: APIC 0x00000000BFFFF4A0 000076 (v01 Google GOOGAPIC 00000001 GOOG 00000001)
[    0.027758] ACPI: WAET 0x00000000BFFFF470 000028 (v01 Google GOOGWAET 00000001 GOOG 00000001)
[    0.028907] ACPI: SRAT 0x00000000BFFFF3A0 0000C8 (v01 Google GOOGSRAT 00000001 GOOG 00000001)
[    0.030336] SRAT: PXM 0 -> APIC 0x00 -> Node 0
[    0.031052] SRAT: PXM 0 -> APIC 0x01 -> Node 0
[    0.031749] ACPI: SRAT: Node 0 PXM 0 [mem 0x00000000-0x0009ffff]
[    0.032614] ACPI: SRAT: Node 0 PXM 0 [mem 0x00100000-0xbfffffff]
[    0.033426] ACPI: SRAT: Node 0 PXM 0 [mem 0x100000000-0x21fffffff]
[    0.034295] NUMA: Node 0 [mem 0x00000000-0x0009ffff] + [mem 0x00100000-0xbfffffff] -> [mem 0x00000000-0xbfffffff]
[    0.035796] NUMA: Node 0 [mem 0x00000000-0xbfffffff] + [mem 0x100000000-0x21fffffff] -> [mem 0x00000000-0x21fffffff]
[    0.037332] NODE_DATA(0) allocated [mem 0x21fffa000-0x21fffdfff]
[    0.085708] Zone ranges:
[    0.086127]   DMA      [mem 0x0000000000001000-0x0000000000ffffff]
[    0.086952]   DMA32    [mem 0x0000000001000000-0x00000000ffffffff]
[    0.087801]   Normal   [mem 0x0000000100000000-0x000000021fffffff]
[    0.088663] Movable zone start for each node
[    0.089244] Early memory node ranges
[    0.089771]   node   0: [mem 0x0000000000001000-0x000000000009efff]
[    0.090655]   node   0: [mem 0x0000000000100000-0x00000000bfffcfff]
[    0.091513]   node   0: [mem 0x0000000100000000-0x000000021fffffff]
[    0.092412] Zeroed struct page in unavailable ranges: 101 pages
[    0.092418] Initmem setup node 0 [mem 0x0000000000001000-0x000000021fffffff]
[    0.601307] kasan: KernelAddressSanitizer initialized
[    0.602649] ACPI: PM-Timer IO Port: 0xb008
[    0.603257] ACPI: LAPIC_NMI (acpi_id[0xff] dfl dfl lint[0x1])
[    0.604165] IOAPIC[0]: apic_id 0, version 17, address 0xfec00000, GSI 0-23
[    0.605247] ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level)
[    0.606320] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
[    0.607411] ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level)
[    0.608350] ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level)
[    0.609307] Using ACPI (MADT) for SMP configuration information
[    0.610126] smpboot: Allowing 2 CPUs, 0 hotplug CPUs
[    0.610899] PM: Registered nosave memory: [mem 0x00000000-0x00000fff]
[    0.611860] PM: Registered nosave memory: [mem 0x0009f000-0x0009ffff]
[    0.612706] PM: Registered nosave memory: [mem 0x000a0000-0x000effff]
[    0.613606] PM: Registered nosave memory: [mem 0x000f0000-0x000fffff]
[    0.614521] PM: Registered nosave memory: [mem 0xbfffd000-0xbfffffff]
[    0.615487] PM: Registered nosave memory: [mem 0xc0000000-0xfffbbfff]
[    0.616405] PM: Registered nosave memory: [mem 0xfffbc000-0xffffffff]
[    0.617307] [mem 0xc0000000-0xfffbbfff] available for PCI devices
[    0.618155] Booting paravirtualized kernel on KVM
[    0.618800] clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[    0.620252] random: get_random_bytes called from start_kernel+0x153/0xa5a with crng_init=0
[    0.621421] setup_percpu: NR_CPUS:64 nr_cpumask_bits:64 nr_cpu_ids:2 nr_node_ids:1
[    0.623561] percpu: Embedded 56 pages/cpu @(____ptrval____) s189320 r8192 d31864 u1048576
[    0.624795] Built 1 zonelists, mobility grouping on.  Total pages: 1935238
[    0.625747] Policy zone: Normal
[    0.626407] Kernel command line: BOOT_IMAGE=/vmlinuz root=/dev/sda1 console=ttyS0 earlyprintk=serial vsyscall=native rodata=n oops=panic panic_on_warn=1 nmi_watchdog=panic panic=86400 security=smack ima_policy=tcb workqueue.watchdog_thresh=140 kvm-intel.nested=1 nf-conntrack-ftp.ports=20000 nf-conntrack-tftp.ports=20000 nf-conntrack-sip.ports=20000 nf-conntrack-irc.ports=20000 nf-conntrack-sane.ports=20000 nopcid
[    1.399589] Memory: 6489320K/7863916K available (114713K kernel code, 13725K rwdata, 17364K rodata, 3092K init, 25676K bss, 1374596K reserved, 0K cma-reserved)
[    1.404824] Running RCU self tests
[    1.405339] rcu: Preemptible hierarchical RCU implementation.
[    1.406111] rcu: 	RCU lockdep checking is enabled.
[    1.406767] rcu: 	RCU restricting CPUs from NR_CPUS=64 to nr_cpu_ids=2.
[    1.407740] rcu: 	RCU callback double-/use-after-free debug enabled.
[    1.408684] 	Tasks RCU enabled.
[    1.409129] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
[    1.410149] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
[    1.418058] NR_IRQS: 4352, nr_irqs: 440, preallocated irqs: 16
[    1.420778] Console: colour VGA+ 80x25
[    1.421392] printk: console [ttyS0] enabled
[    1.421392] printk: console [ttyS0] enabled
[    1.422708] printk: bootconsole [earlyser0] disabled
[    1.422708] printk: bootconsole [earlyser0] disabled
[    1.424146] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
[    1.425303] ... MAX_LOCKDEP_SUBCLASSES:  8
[    1.426108] ... MAX_LOCK_DEPTH:          48
[    1.426745] ... MAX_LOCKDEP_KEYS:        8191
[    1.427452] ... CLASSHASH_SIZE:          4096
[    1.428151] ... MAX_LOCKDEP_ENTRIES:     32768
[    1.428815] ... MAX_LOCKDEP_CHAINS:      65536
[    1.429452] ... CHAINHASH_SIZE:          32768
[    1.430106]  memory used by lock dependency info: 7263 kB
[    1.430868]  per task-struct memory footprint: 1920 bytes
[    1.434208] ACPI: Core revision 20181003
[    1.435547] APIC: Switch to symmetric I/O mode setup
[    1.436835] x2apic enabled
[    1.438527] Switched APIC routing to physical x2apic.
[    1.442749] ..TIMER: vector=0x30 apic1=0 pin1=0 apic2=-1 pin2=-1
[    1.443870] clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x212735223b2, max_idle_ns: 440795277976 ns
[    1.445383] Calibrating delay loop (skipped) preset value.. 4600.00 BogoMIPS (lpj=23000000)
[    1.455361] pid_max: default: 32768 minimum: 301
[    1.456539] LSM: Security Framework initializing
[    1.457216] Yama: becoming mindful.
[    1.457801] Smack:  Initializing.
[    1.458302] Smack:  Netfilter enabled.
[    1.458978] Smack:  IPv6 Netfilter enabled.
[    1.459616] AppArmor: AppArmor disabled by boot time parameter
[    1.466658] Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes)
[    1.470255] Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes)
[    1.471642] Mount-cache hash table entries: 16384 (order: 5, 131072 bytes)
[    1.473337] Mountpoint-cache hash table entries: 16384 (order: 5, 131072 bytes)
[    1.476422] mce: CPU supports 32 MCE banks
[    1.477260] Last level iTLB entries: 4KB 1024, 2MB 1024, 4MB 1024
[    1.478231] Last level dTLB entries: 4KB 1024, 2MB 1024, 4MB 1024, 1GB 4
[    1.479200] Spectre V2 : Mitigation: Full generic retpoline
[    1.480026] Spectre V2 : Spectre v2 / SpectreRSB mitigation: Filling RSB on context switch
[    1.481172] Speculative Store Bypass: Vulnerable
[    1.482772] Freeing SMP alternatives memory: 72K
[    1.495345] smpboot: CPU0: Intel(R) Xeon(R) CPU @ 2.30GHz (family: 0x6, model: 0x3f, stepping: 0x0)
[    1.545432] Performance Events: unsupported p6 CPU model 63 no PMU driver, software events only.
[    1.565376] rcu: Hierarchical SRCU implementation.
[    1.585609] NMI watchdog: Perf NMI watchdog permanently disabled
[    1.615398] smp: Bringing up secondary CPUs ...
[    1.696375] x86: Booting SMP configuration:
[    1.697078] .... node  #0, CPUs:      #1
[    0.026102] kvm-clock: cpu 1, msr a518041, secondary cpu clock
[    1.700442] smp: Brought up 1 node, 2 CPUs
[    1.700442] smpboot: Max logical packages: 1
[    1.700442] smpboot: Total of 2 processors activated (9200.00 BogoMIPS)
[    1.705795] devtmpfs: initialized
[    1.716985] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[    1.717094] futex hash table entries: 512 (order: 4, 65536 bytes)
[    1.718267] xor: automatically using best checksumming function   avx       
[    1.718267] RTC time: 13:09:50, date: 10/30/18
[    1.719864] NET: Registered protocol family 16
[    1.723036] audit: initializing netlink subsys (disabled)
[    1.726498] kworker/u4:0 (25) used greatest stack depth: 23040 bytes left
[    1.727699] audit: type=2000 audit(1540904990.683:1): state=initialized audit_enabled=0 res=1
[    1.738563] cpuidle: using governor menu
[    1.738563] ACPI: bus type PCI registered
[    1.739681] dca service started, version 1.12.1
[    1.745677] PCI: Using configuration type 1 for base access
[    1.861780] kworker/u4:3 (350) used greatest stack depth: 21448 bytes left
[    1.940120] kworker/u4:0 (525) used greatest stack depth: 21120 bytes left
[    1.960316] kworker/u4:0 (571) used greatest stack depth: 21112 bytes left
[    2.029174] kworker/u4:0 (769) used greatest stack depth: 20920 bytes left
[    2.117569] HugeTLB registered 1.00 GiB page size, pre-allocated 0 pages
[    2.118674] HugeTLB registered 2.00 MiB page size, pre-allocated 0 pages
[    2.118699] cryptd: max_cpu_qlen set to 1000
[    2.295441] raid6: sse2x1   gen()  1871 MB/s
[    2.465397] raid6: sse2x1   xor()   996 MB/s
[    2.635372] raid6: sse2x2   gen()  3652 MB/s
[    2.805373] raid6: sse2x2   xor()  1898 MB/s
[    2.970397] raid6: sse2x4   gen()  5331 MB/s
[    3.140417] raid6: sse2x4   xor()  3194 MB/s
[    3.310399] raid6: avx2x1   gen()  3828 MB/s
[    3.480396] raid6: avx2x1   xor()  2028 MB/s
[    3.655396] raid6: avx2x2   gen()  7063 MB/s
[    3.820379] raid6: avx2x2   xor()  3704 MB/s
[    3.990386] raid6: avx2x4   gen() 10502 MB/s
[    4.160385] raid6: avx2x4   xor()  6165 MB/s
[    4.161135] raid6: using algorithm avx2x4 gen() 10502 MB/s
[    4.161912] raid6: .... xor() 6165 MB/s, rmw enabled
[    4.162620] raid6: using avx2x2 recovery algorithm
[    4.166124] ACPI: Added _OSI(Module Device)
[    4.166124] ACPI: Added _OSI(Processor Device)
[    4.166124] ACPI: Added _OSI(3.0 _SCP Extensions)
[    4.166124] ACPI: Added _OSI(Processor Aggregator Device)
[    4.166793] ACPI: Added _OSI(Linux-Dell-Video)
[    4.167482] ACPI: Added _OSI(Linux-Lenovo-NV-HDMI-Audio)
[    4.214346] ACPI: 2 ACPI AML tables successfully acquired and loaded
[    4.232642] ACPI: Interpreter enabled
[    4.233558] ACPI: (supports S0 S3 S4 S5)
[    4.234140] ACPI: Using IOAPIC for interrupt routing
[    4.235368] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[    4.237366] ACPI: Enabled 16 GPEs in block 00 to 0F
[    4.319030] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])
[    4.320032] acpi PNP0A03:00: _OSC: OS supports [ASPM ClockPM Segments MSI]
[    4.325381] acpi PNP0A03:00: fail to add MMCONFIG information, can't access extended PCI configuration space under this bridge.
[    4.326876] PCI host bridge to bus 0000:00
[    4.327626] pci_bus 0000:00: root bus resource [io  0x0000-0x0cf7 window]
[    4.328627] pci_bus 0000:00: root bus resource [io  0x0d00-0xffff window]
[    4.329599] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff window]
[    4.330917] pci_bus 0000:00: root bus resource [mem 0xc0000000-0xfebfffff window]
[    4.332130] pci_bus 0000:00: root bus resource [bus 00-ff]
[    4.365530] pci 0000:00:01.3: quirk: [io  0xb000-0xb03f] claimed by PIIX4 ACPI
[    4.425533] ACPI: PCI Interrupt Link [LNKA] (IRQs 5 *10 11)
[    4.426658] ACPI: PCI Interrupt Link [LNKB] (IRQs 5 *10 11)
[    4.429759] ACPI: PCI Interrupt Link [LNKC] (IRQs 5 10 *11)
[    4.432967] ACPI: PCI Interrupt Link [LNKD] (IRQs 5 10 *11)
[    4.435717] ACPI: PCI Interrupt Link [LNKS] (IRQs *9)
[    4.450793] vgaarb: loaded
[    4.451792] SCSI subsystem initialized
[    4.456233] ACPI: bus type USB registered
[    4.457864] usbcore: registered new interface driver usbfs
[    4.459576] usbcore: registered new interface driver hub
[    4.459576] usbcore: registered new device driver usb
[    4.459576] media: Linux media interface: v0.10
[    4.459589] videodev: Linux video capture interface: v2.00
[    4.466955] pps_core: LinuxPPS API ver. 1 registered
[    4.466955] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
[    4.466955] PTP clock support registered
[    4.467600] EDAC MC: Ver: 3.0.0
[    4.476349] Advanced Linux Sound Architecture Driver Initialized.
[    4.477283] PCI: Using ACPI for IRQ routing
[    4.479093] Bluetooth: Core ver 2.22
[    4.479794] NET: Registered protocol family 31
[    4.485381] Bluetooth: HCI device and connection manager initialized
[    4.485381] Bluetooth: HCI socket layer initialized
[    4.485381] Bluetooth: L2CAP socket layer initialized
[    4.485381] Bluetooth: SCO socket layer initialized
[    4.485381] NET: Registered protocol family 8
[    4.487095] NET: Registered protocol family 20
[    4.487155] NetLabel: Initializing
[    4.487758] NetLabel:  domain hash size = 128
[    4.488444] NetLabel:  protocols = UNLABELED CIPSOv4 CALIPSO
[    4.489480] NetLabel:  unlabeled traffic allowed by default
[    4.498549] nfc: nfc_init: NFC Core ver 0.1
[    4.499575] NET: Registered protocol family 39
[    4.500392] clocksource: Switched to clocksource kvm-clock
[    5.004720] VFS: Disk quotas dquot_6.6.0
[    5.005628] VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[    5.007228] FS-Cache: Loaded
[    5.008671] CacheFiles: Loaded
[    5.009548] pnp: PnP ACPI init
[    5.021388] pnp: PnP ACPI: found 7 devices
[    5.080786] clocksource: acpi_pm: mask: 0xffffff max_cycles: 0xffffff, max_idle_ns: 2085701024 ns
[    5.082959] NET: Registered protocol family 2
[    5.088332] tcp_listen_portaddr_hash hash table entries: 4096 (order: 6, 294912 bytes)
[    5.089953] TCP established hash table entries: 65536 (order: 7, 524288 bytes)
[    5.093424] TCP bind hash table entries: 65536 (order: 10, 4194304 bytes)
[    5.098912] TCP: Hash tables configured (established 65536 bind 65536)
[    5.101169] UDP hash table entries: 4096 (order: 7, 655360 bytes)
[    5.102738] UDP-Lite hash table entries: 4096 (order: 7, 655360 bytes)
[    5.105078] NET: Registered protocol family 1
[    5.107693] RPC: Registered named UNIX socket transport module.
[    5.108721] RPC: Registered udp transport module.
[    5.109411] RPC: Registered tcp transport module.
[    5.110145] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    5.122668] NET: Registered protocol family 44
[    5.123437] pci 0000:00:00.0: Limiting direct PCI/PCI transfers
[    5.125073] PCI-DMA: Using software bounce buffering for IO (SWIOTLB)
[    5.126358] software IO TLB: mapped [mem 0xbbffd000-0xbfffd000] (64MB)
[    5.128751] RAPL PMU: API unit is 2^-32 Joules, 3 fixed counters, 10737418240 ms ovfl timer
[    5.129999] RAPL PMU: hw unit of domain pp0-core 2^-0 Joules
[    5.130822] RAPL PMU: hw unit of domain package 2^-0 Joules
[    5.131772] RAPL PMU: hw unit of domain dram 2^-16 Joules
[    5.132940] VPID CAP should not exist if not support 1-setting enable VPID VM-execution control
[    5.137209] kvm: already loaded the other module
[    5.138209] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x212735223b2, max_idle_ns: 440795277976 ns
[    5.140135] Machine check injector initialized
[    5.145316] check: Scanning for low memory corruption every 60 seconds
[    5.264086] Initialise system trusted keyrings
[    5.266327] workingset: timestamp_bits=40 max_order=21 bucket_order=0
[    5.267843] zbud: loaded
[    5.271916] DLM installed
[    5.273952] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[    5.276345] FS-Cache: Netfs 'nfs' registered for caching
[    5.278103] NFS: Registering the id_resolver key type
[    5.278953] Key type id_resolver registered
[    5.279611] Key type id_legacy registered
[    5.280255] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
[    5.281272] Installing knfsd (copyright (C) 1996 okir@monad.swb.de).
[    5.283202] ntfs: driver 2.1.32 [Flags: R/W].
[    5.284593] fuse init (API version 7.27)
[    5.288021] JFS: nTxBlock = 8192, nTxLock = 65536
[    5.296259] SGI XFS with ACLs, security attributes, realtime, no debug enabled
[    5.300323] 9p: Installing v9fs 9p2000 file system support
[    5.301192] FS-Cache: Netfs '9p' registered for caching
[    5.304494] gfs2: GFS2 installed
[    5.308130] FS-Cache: Netfs 'ceph' registered for caching
[    5.309195] ceph: loaded (mds proto 32)
[    5.412184] NET: Registered protocol family 38
[    5.415827] async_tx: api initialized (async)
[    5.416584] Key type asymmetric registered
[    5.417311] Asymmetric key parser 'x509' registered
[    5.418081] Key type pkcs7_test registered
[    5.419003] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 246)
[    5.420659] io scheduler noop registered
[    5.421322] io scheduler deadline registered
[    5.422108] io scheduler cfq registered (default)
[    5.422812] io scheduler mq-deadline registered
[    5.423480] io scheduler kyber registered
[    5.424243] io scheduler bfq registered
[    5.431196] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
[    5.433461] ACPI: Power Button [PWRF]
[    5.434945] input: Sleep Button as /devices/LNXSYSTM:00/LNXSLPBN:00/input/input1
[    5.437427] ACPI: Sleep Button [SLPF]
[    5.442877] ioatdma: Intel(R) QuickData Technology Driver 4.00
[    5.454332] PCI Interrupt Link [LNKC] enabled at IRQ 11
[    5.455231] virtio-pci 0000:00:03.0: virtio_pci: leaving for legacy driver
[    5.468068] PCI Interrupt Link [LNKD] enabled at IRQ 10
[    5.468920] virtio-pci 0000:00:04.0: virtio_pci: leaving for legacy driver
[    5.799125] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[    5.822641] 00:03: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
[    5.848847] 00:04: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A
[    5.873898] 00:05: ttyS2 at I/O 0x3e8 (irq = 6, base_baud = 115200) is a 16550A
[    5.900461] 00:06: ttyS3 at I/O 0x2e8 (irq = 7, base_baud = 115200) is a 16550A
[    5.908971] Non-volatile memory driver v1.3
[    5.910845] Linux agpgart interface v0.103
[    5.919123] [drm] Initialized vgem 1.0.0 20120112 for virtual device on minor 0
[    5.921303] usbcore: registered new interface driver udl
[    5.937016] ==================================================================
[    5.939060] BUG: KASAN: use-after-free in __lock_acquire+0x36d9/0x4c20
[    5.939076] Read of size 8 at addr ffff8801d1b6b540 by task swapper/0/1
[    5.942555] 
[    5.942573] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.19.0+ #88
[    5.944629] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[    5.944639] Call Trace:
[    5.947374]  dump_stack+0x244/0x39d
[    5.947374]  ? dump_stack_print_info.cold.1+0x20/0x20
[    5.947374]  ? printk+0xa7/0xcf
[    5.947374]  ? kmsg_dump_rewind_nolock+0xe4/0xe4
[    5.947374]  print_address_description.cold.7+0x9/0x1ff
[    5.947374]  kasan_report.cold.8+0x242/0x309
[    5.947374]  ? __lock_acquire+0x36d9/0x4c20
[    5.947374]  __asan_report_load8_noabort+0x14/0x20
[    5.947374]  __lock_acquire+0x36d9/0x4c20
[    5.947374]  ? mark_held_locks+0x130/0x130
[    5.947374]  ? mark_held_locks+0x130/0x130
[    5.955437]  ? zap_class+0x640/0x640
[    5.955437]  ? zap_class+0x640/0x640
[    5.955437]  ? zap_class+0x640/0x640
[    5.955437]  ? print_usage_bug+0xc0/0xc0
[    5.955437]  ? __wake_up_common_lock+0x1d0/0x330
[    5.955437]  ? zap_class+0x640/0x640
[    5.955437]  ? perf_trace_sched_process_exec+0x860/0x860
[    5.955437]  ? blk_cleanup_queue+0x2c2/0x710
[    5.955437]  ? zap_class+0x640/0x640
[    5.955437]  ? zap_class+0x640/0x640
[    5.955437]  ? __might_sleep+0x95/0x190
[    5.955437]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[    5.955437]  ? blk_mq_freeze_queue_wait+0x2f8/0x460
[    5.955437]  ? find_held_lock+0x36/0x1c0
[    5.955437]  lock_acquire+0x1ed/0x520
[    5.955437]  ? del_timer_sync+0x80/0x270
[    5.955437]  ? lock_release+0xa00/0xa00
[    5.955437]  ? trace_hardirqs_off+0xb8/0x310
[    5.955437]  ? blk_cleanup_queue+0x413/0x710
[    5.955437]  ? trace_hardirqs_on+0x310/0x310
[    5.955437]  ? __lock_is_held+0xb5/0x140
[    5.955437]  del_timer_sync+0xb7/0x270
[    5.955437]  ? del_timer_sync+0x80/0x270
[    5.955437]  blk_cleanup_queue+0x413/0x710
[    5.955437]  brd_free+0x5d/0x71
[    5.955437]  brd_init+0x2eb/0x393
[    5.955437]  ? ramdisk_size+0x28/0x28
[    5.955437]  ? ramdisk_size+0x28/0x28
[    5.955437]  ? ramdisk_size+0x28/0x28
[    5.955437]  do_one_initcall+0x145/0x957
[    5.955437]  ? perf_trace_initcall_level+0x770/0x770
[    5.955437]  ? rcu_lockdep_current_cpu_online+0x1a4/0x210
[    5.955437]  ? rcu_pm_notify+0xc0/0xc0
[    5.955437]  ? trace_initcall_level+0x2d6/0x31b
[    5.955437]  ? arch_local_irq_disable.part.5+0xb/0xb
[    5.955437]  ? down_write_nested+0xc0/0x130
[    5.955437]  ? down_write_nested+0x130/0x130
[    5.955437]  ? down_read+0x120/0x120
[    5.955437]  kernel_init_freeable+0x5c6/0x6b9
[    5.955437]  ? rest_init+0x372/0x372
[    5.955437]  kernel_init+0x11/0x1ae
[    5.955437]  ? rest_init+0x372/0x372
[    5.955437]  ret_from_fork+0x3a/0x50
[    5.955437] 
[    5.955437] Allocated by task 1:
[    5.955437]  save_stack+0x43/0xd0
[    5.955437]  kasan_kmalloc+0xc7/0xe0
[    5.955437]  kmem_cache_alloc_node_trace+0x14c/0x740
[    5.955437]  bdi_alloc_node+0x89/0xe0
[    5.955437]  blk_alloc_queue_node+0x2b7/0xe80
[    5.955437]  blk_alloc_queue+0x1a/0x20
[    5.955437]  brd_alloc+0xb9/0x540
[    5.955437]  brd_init+0x11d/0x393
[    5.955437]  do_one_initcall+0x145/0x957
[    5.955437]  kernel_init_freeable+0x5c6/0x6b9
[    5.955437]  kernel_init+0x11/0x1ae
[    5.955437]  ret_from_fork+0x3a/0x50
[    5.955437] 
[    5.955437] Freed by task 12:
[    5.955437]  save_stack+0x43/0xd0
[    5.955437]  __kasan_slab_free+0x102/0x150
[    5.955437]  kasan_slab_free+0xe/0x10
[    5.955437]  kfree+0xcf/0x230
[    5.955437]  bdi_put+0x138/0x180
[    5.955437]  blk_exit_queue+0xbf/0xf0
[    5.955437]  __blk_release_queue+0x12f/0x510
[    5.955437]  process_one_work+0xc90/0x1c40
[    5.955437]  worker_thread+0x17f/0x1390
[    5.955437]  kthread+0x35a/0x440
[    5.955437]  ret_from_fork+0x3a/0x50
[    5.955437] 
[    5.955437] The buggy address belongs to the object at ffff8801d1b6ae80
[    5.955437]  which belongs to the cache kmalloc-2k of size 2048
[    5.955437] The buggy address is located 1728 bytes inside of
[    5.955437]  2048-byte region [ffff8801d1b6ae80, ffff8801d1b6b680)
[    5.955437] The buggy address belongs to the page:
[    5.955437] page:ffffea000746da80 count:1 mapcount:0 mapping:ffff8801da800c40 index:0x0 compound_mapcount: 0
[    5.955437] flags: 0x2fffc0000010200(slab|head)
[    5.955437] raw: 02fffc0000010200 ffffea000746da08 ffffea000746dc08 ffff8801da800c40
[    5.955437] raw: 0000000000000000 ffff8801d1b6a600 0000000100000003 0000000000000000
[    5.955437] page dumped because: kasan: bad access detected
[    5.955437] 
[    5.955437] Memory state around the buggy address:
[    5.955437]  ffff8801d1b6b400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[    5.955437]  ffff8801d1b6b480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[    5.955437] >ffff8801d1b6b500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[    5.955437]                                            ^
[    5.955437]  ffff8801d1b6b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[    5.955437]  ffff8801d1b6b600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[    5.955437] ==================================================================
[    5.955437] Disabling lock debugging due to kernel taint
[    5.955437] Kernel panic - not syncing: panic_on_warn set ...
[    5.955437] 
[    5.955437] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G    B             4.19.0+ #88
[    5.955437] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[    5.955437] Call Trace:
[    5.955437]  dump_stack+0x244/0x39d
[    5.955437]  ? dump_stack_print_info.cold.1+0x20/0x20
[    5.955437]  ? lock_downgrade+0x900/0x900
[    5.955437]  panic+0x238/0x4e7
[    5.955437]  ? add_taint.cold.5+0x16/0x16
[    5.955437]  ? add_taint.cold.5+0x5/0x16
[    5.955437]  ? trace_hardirqs_off+0xaf/0x310
[    5.955437]  kasan_end_report+0x47/0x4f
[    5.955437]  kasan_report.cold.8+0x76/0x309
[    5.955437]  ? __lock_acquire+0x36d9/0x4c20
[    5.955437]  __asan_report_load8_noabort+0x14/0x20
[    5.955437]  __lock_acquire+0x36d9/0x4c20
[    5.955437]  ? mark_held_locks+0x130/0x130
[    5.955437]  ? mark_held_locks+0x130/0x130
[    5.955437]  ? zap_class+0x640/0x640
[    5.955437]  ? zap_class+0x640/0x640
[    5.955437]  ? zap_class+0x640/0x640
[    5.955437]  ? print_usage_bug+0xc0/0xc0
[    5.955437]  ? __wake_up_common_lock+0x1d0/0x330
[    5.955437]  ? zap_class+0x640/0x640
[    5.955437]  ? perf_trace_sched_process_exec+0x860/0x860
[    5.955437]  ? blk_cleanup_queue+0x2c2/0x710
[    5.955437]  ? zap_class+0x640/0x640
[    5.955437]  ? zap_class+0x640/0x640
[    5.955437]  ? __might_sleep+0x95/0x190
[    5.955437]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[    5.955437]  ? blk_mq_freeze_queue_wait+0x2f8/0x460
[    5.955437]  ? find_held_lock+0x36/0x1c0
[    5.955437]  lock_acquire+0x1ed/0x520
[    5.955437]  ? del_timer_sync+0x80/0x270
[    5.955437]  ? lock_release+0xa00/0xa00
[    5.955437]  ? trace_hardirqs_off+0xb8/0x310
[    5.955437]  ? blk_cleanup_queue+0x413/0x710
[    5.955437]  ? trace_hardirqs_on+0x310/0x310
[    5.955437]  ? __lock_is_held+0xb5/0x140
[    5.955437]  del_timer_sync+0xb7/0x270
[    5.955437]  ? del_timer_sync+0x80/0x270
[    5.955437]  blk_cleanup_queue+0x413/0x710
[    5.955437]  brd_free+0x5d/0x71
[    5.955437]  brd_init+0x2eb/0x393
[    5.955437]  ? ramdisk_size+0x28/0x28
[    5.955437]  ? ramdisk_size+0x28/0x28
[    5.955437]  ? ramdisk_size+0x28/0x28
[    5.955437]  do_one_initcall+0x145/0x957
[    5.955437]  ? perf_trace_initcall_level+0x770/0x770
[    5.955437]  ? rcu_lockdep_current_cpu_online+0x1a4/0x210
[    5.955437]  ? rcu_pm_notify+0xc0/0xc0
[    5.955437]  ? trace_initcall_level+0x2d6/0x31b
[    5.955437]  ? arch_local_irq_disable.part.5+0xb/0xb
[    5.955437]  ? down_write_nested+0xc0/0x130
[    5.955437]  ? down_write_nested+0x130/0x130
[    5.955437]  ? down_read+0x120/0x120
[    5.955437]  kernel_init_freeable+0x5c6/0x6b9
[    5.955437]  ? rest_init+0x372/0x372
[    5.955437]  kernel_init+0x11/0x1ae
[    5.955437]  ? rest_init+0x372/0x372
[    5.955437]  ret_from_fork+0x3a/0x50
[    5.955437] Kernel Offset: disabled
[    5.955437] Rebooting in 86400 seconds..