ooting the kernel. [ 0.000000] Linux version 4.17.0+ (syzkaller@ci) (gcc version 8.0.1 20180413 (experimental) (GCC)) #92 SMP Sat Jun 9 09:14:41 UTC 2018 [ 0.000000] Command line: BOOT_IMAGE=/vmlinuz root=/dev/sda1 console=ttyS0 earlyprintk=serial vsyscall=native rodata=n ftrace_dump_on_oops=orig_cpu oops=panic panic_on_warn=1 nmi_watchdog=panic panic=86400 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] 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 0x0000000000100000-0x00000000bfff2fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bfff3000-0x00000000bfffffff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000fffbc000-0x00000000ffffffff] reserved [ 0.000000] BIOS-e820: [mem 0x0000000100000000-0x000000021fffffff] usable [ 0.000000] 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] last_pfn = 0x220000 max_arch_pfn = 0x400000000 [ 0.000000] x86/PAT: Configuration [0-7]: WB WC UC- UC WB WP UC- WT [ 0.000000] last_pfn = 0xbfff3 max_arch_pfn = 0x400000000 [ 0.000000] found SMP MP-table at [mem 0x000f22b0-0x000f22bf] mapped at [(____ptrval____)] [ 0.000000] Scanning 1 areas for low memory corruption [ 0.000000] Using GB pages for direct mapping [ 0.000000] ACPI: Early table checksum verification disabled [ 0.000000] ACPI: RSDP 0x00000000000F2270 000014 (v00 Google) [ 0.000000] ACPI: RSDT 0x00000000BFFF3430 000038 (v01 Google GOOGRSDT 00000001 GOOG 00000001) [ 0.000000] ACPI: FACP 0x00000000BFFFCF60 0000F4 (v02 Google GOOGFACP 00000001 GOOG 00000001) [ 0.000000] ACPI: DSDT 0x00000000BFFF3470 0017B2 (v01 Google GOOGDSDT 00000001 GOOG 00000001) [ 0.000000] ACPI: FACS 0x00000000BFFFCF00 000040 [ 0.000000] ACPI: FACS 0x00000000BFFFCF00 000040 [ 0.000000] ACPI: SSDT 0x00000000BFFF65F0 00690D (v01 Google GOOGSSDT 00000001 GOOG 00000001) [ 0.000000] ACPI: APIC 0x00000000BFFF5D10 000076 (v01 Google GOOGAPIC 00000001 GOOG 00000001) [ 0.000000] ACPI: WAET 0x00000000BFFF5CE0 000028 (v01 Google GOOGWAET 00000001 GOOG 00000001) [ 0.000000] ACPI: SRAT 0x00000000BFFF4C30 0000C8 (v01 Google GOOGSRAT 00000001 GOOG 00000001) [ 0.000000] SRAT: PXM 0 -> APIC 0x00 -> Node 0 [ 0.000000] SRAT: PXM 0 -> APIC 0x01 -> Node 0 [ 0.000000] ACPI: SRAT: Node 0 PXM 0 [mem 0x00000000-0x0009ffff] [ 0.000000] ACPI: SRAT: Node 0 PXM 0 [mem 0x00100000-0xbfffffff] [ 0.000000] ACPI: SRAT: Node 0 PXM 0 [mem 0x100000000-0x21fffffff] [ 0.000000] NUMA: Node 0 [mem 0x00000000-0x0009ffff] + [mem 0x00100000-0xbfffffff] -> [mem 0x00000000-0xbfffffff] [ 0.000000] NUMA: Node 0 [mem 0x00000000-0xbfffffff] + [mem 0x100000000-0x21fffffff] -> [mem 0x00000000-0x21fffffff] [ 0.000000] NODE_DATA(0) allocated [mem 0x21fffa000-0x21fffdfff] [ 0.000000] kvm-clock: cpu 0, msr 2:1fff8001, primary cpu clock [ 0.000000] kvm-clock: Using msrs 4b564d01 and 4b564d00 [ 0.000000] kvm-clock: using sched offset of 3486005834 cycles [ 0.000000] clocksource: kvm-clock: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns [ 0.000000] Zone ranges: [ 0.000000] DMA [mem 0x0000000000001000-0x0000000000ffffff] [ 0.000000] DMA32 [mem 0x0000000001000000-0x00000000ffffffff] [ 0.000000] Normal [mem 0x0000000100000000-0x000000021fffffff] [ 0.000000] Movable zone start for each node [ 0.000000] Early memory node ranges [ 0.000000] node 0: [mem 0x0000000000001000-0x000000000009efff] [ 0.000000] node 0: [mem 0x0000000000100000-0x00000000bfff2fff] [ 0.000000] node 0: [mem 0x0000000100000000-0x000000021fffffff] [ 0.000000] Initmem setup node 0 [mem 0x0000000000001000-0x000000021fffffff] [ 0.000000] Reserved but unavailable: 98 pages [ 0.000000] kasan: KernelAddressSanitizer initialized [ 0.000000] ACPI: PM-Timer IO Port: 0xb008 [ 0.000000] ACPI: LAPIC_NMI (acpi_id[0xff] dfl dfl lint[0x1]) [ 0.000000] IOAPIC[0]: apic_id 0, version 17, address 0xfec00000, GSI 0-23 [ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level) [ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level) [ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level) [ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level) [ 0.000000] Using ACPI (MADT) for SMP configuration information [ 0.000000] smpboot: Allowing 2 CPUs, 0 hotplug CPUs [ 0.000000] PM: Registered nosave memory: [mem 0x00000000-0x00000fff] [ 0.000000] PM: Registered nosave memory: [mem 0x0009f000-0x0009ffff] [ 0.000000] PM: Registered nosave memory: [mem 0x000a0000-0x000effff] [ 0.000000] PM: Registered nosave memory: [mem 0x000f0000-0x000fffff] [ 0.000000] PM: Registered nosave memory: [mem 0xbfff3000-0xbfffffff] [ 0.000000] PM: Registered nosave memory: [mem 0xc0000000-0xfffbbfff] [ 0.000000] PM: Registered nosave memory: [mem 0xfffbc000-0xffffffff] [ 0.000000] [mem 0xc0000000-0xfffbbfff] available for PCI devices [ 0.000000] Booting paravirtualized kernel on KVM [ 0.000000] clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1910969940391419 ns [ 0.000000] random: get_random_bytes called from start_kernel+0x10a/0x92d with crng_init=0 [ 0.000000] setup_percpu: NR_CPUS:64 nr_cpumask_bits:64 nr_cpu_ids:2 nr_node_ids:1 [ 0.000000] percpu: Embedded 56 pages/cpu @(____ptrval____) s188488 r8192 d32696 u1048576 [ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 1935228 [ 0.000000] Policy zone: Normal [ 0.000000] Kernel command line: BOOT_IMAGE=/vmlinuz root=/dev/sda1 console=ttyS0 earlyprintk=serial vsyscall=native rodata=n ftrace_dump_on_oops=orig_cpu oops=panic panic_on_warn=1 nmi_watchdog=panic panic=86400 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] Memory: 6499856K/7863876K available (110620K kernel code, 12278K rwdata, 16036K rodata, 3952K init, 23144K bss, 1364020K reserved, 0K cma-reserved) [ 0.001000] Running RCU self tests [ 0.001000] Hierarchical RCU implementation. [ 0.001000] RCU lockdep checking is enabled. [ 0.001000] RCU restricting CPUs from NR_CPUS=64 to nr_cpu_ids=2. [ 0.001000] RCU callback double-/use-after-free debug enabled. [ 0.001000] RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2 [ 0.001000] NR_IRQS: 4352, nr_irqs: 440, preallocated irqs: 16 [ 0.001000] Console: colour VGA+ 80x25 [ 0.001000] console [ttyS0] enabled [ 0.001000] console [ttyS0] enabled [ 0.001000] bootconsole [earlyser0] disabled [ 0.001000] bootconsole [earlyser0] disabled [ 0.001000] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar [ 0.001000] ... MAX_LOCKDEP_SUBCLASSES: 8 [ 0.001000] ... MAX_LOCK_DEPTH: 48 [ 0.001000] ... MAX_LOCKDEP_KEYS: 8191 [ 0.001000] ... CLASSHASH_SIZE: 4096 [ 0.001000] ... MAX_LOCKDEP_ENTRIES: 32768 [ 0.001000] ... MAX_LOCKDEP_CHAINS: 65536 [ 0.001000] ... CHAINHASH_SIZE: 32768 [ 0.001000] memory used by lock dependency info: 7391 kB [ 0.001000] per task-struct memory footprint: 1920 bytes [ 0.001000] ACPI: Core revision 20180508 [ 0.001028] APIC: Switch to symmetric I/O mode setup [ 0.002448] x2apic enabled [ 0.003014] Switched APIC routing to physical x2apic. [ 0.007000] ..TIMER: vector=0x30 apic1=0 pin1=0 apic2=-1 pin2=-1 [ 0.007000] tsc: Detected 2300.000 MHz processor [ 0.007038] clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x212735223b2, max_idle_ns: 440795277976 ns [ 0.008027] Calibrating delay loop (skipped) preset value.. 4600.00 BogoMIPS (lpj=2300000) [ 0.009013] pid_max: default: 32768 minimum: 301 [ 0.011194] Security Framework initialized [ 0.011822] Yama: becoming mindful. [ 0.012049] SELinux: Initializing. [ 0.013369] AppArmor: AppArmor disabled by boot time parameter [ 0.019155] Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes) [ 0.022452] Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes) [ 0.023155] Mount-cache hash table entries: 16384 (order: 5, 131072 bytes) [ 0.025020] Mountpoint-cache hash table entries: 16384 (order: 5, 131072 bytes) [ 0.028658] CPU: Physical Processor ID: 0 [ 0.029063] mce: CPU supports 32 MCE banks [ 0.030144] Last level iTLB entries: 4KB 1024, 2MB 1024, 4MB 1024 [ 0.031010] Last level dTLB entries: 4KB 1024, 2MB 1024, 4MB 1024, 1GB 4 [ 0.032026] Spectre V2 : Mitigation: Full generic retpoline [ 0.032847] Speculative Store Bypass: Vulnerable [ 0.034270] Freeing SMP alternatives memory: 64K [ 0.037000] smpboot: CPU0: Intel(R) Xeon(R) CPU @ 2.30GHz (family: 0x6, model: 0x3f, stepping: 0x0) [ 0.038272] Performance Events: unsupported p6 CPU model 63 no PMU driver, software events only. [ 0.039231] Hierarchical SRCU implementation. [ 0.040519] NMI watchdog: Perf event create on CPU 0 failed with -2 [ 0.041011] NMI watchdog: Perf NMI watchdog permanently disabled [ 0.043223] smp: Bringing up secondary CPUs ... [ 0.045494] x86: Booting SMP configuration: [ 0.046012] .... node #0, CPUs: #1 [ 0.001000] kvm-clock: cpu 1, msr 2:1fff8041, secondary cpu clock [ 0.048265] smp: Brought up 1 node, 2 CPUs [ 0.049052] smpboot: Max logical packages: 1 [ 0.049688] smpboot: Total of 2 processors activated (9200.00 BogoMIPS) [ 0.053042] devtmpfs: initialized [ 0.064066] kworker/u4:0 (24) used greatest stack depth: 23896 bytes left [ 0.066099] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1911260446275000 ns [ 0.067067] futex hash table entries: 512 (order: 4, 65536 bytes) [ 0.069505] xor: automatically using best checksumming function avx [ 0.070460] RTC time: 9:20:01, date: 06/09/18 [ 0.079649] NET: Registered protocol family 16 [ 0.082795] audit: initializing netlink subsys (disabled) [ 0.083115] audit: type=2000 audit(1528536001.807:1): state=initialized audit_enabled=0 res=1 [ 0.085561] cpuidle: using governor menu [ 0.087746] ACPI: bus type PCI registered [ 0.087949] kworker/u4:1 (30) used greatest stack depth: 23848 bytes left [ 0.090249] PCI: Using configuration type 1 for base access [ 0.118154] kworker/u4:1 (175) used greatest stack depth: 22816 bytes left [ 0.126316] kworker/u4:0 (213) used greatest stack depth: 21752 bytes left [ 0.281986] HugeTLB registered 2.00 MiB page size, pre-allocated 0 pages [ 0.284317] cryptd: max_cpu_qlen set to 1000 [ 0.303047] raid6: sse2x1 gen() 718 MB/s [ 0.320020] raid6: sse2x1 xor() 1035 MB/s [ 0.337022] raid6: sse2x2 gen() 3835 MB/s [ 0.354016] raid6: sse2x2 xor() 2019 MB/s [ 0.371013] raid6: sse2x4 gen() 6074 MB/s [ 0.388012] raid6: sse2x4 xor() 3320 MB/s [ 0.405013] raid6: avx2x1 gen() 3996 MB/s [ 0.422014] raid6: avx2x1 xor() 2033 MB/s [ 0.439019] raid6: avx2x2 gen() 6562 MB/s [ 0.456020] raid6: avx2x2 xor() 3779 MB/s [ 0.473012] raid6: avx2x4 gen() 11023 MB/s [ 0.490017] raid6: avx2x4 xor() 5861 MB/s [ 0.490739] raid6: using algorithm avx2x4 gen() 11023 MB/s [ 0.491010] raid6: .... xor() 5861 MB/s, rmw enabled [ 0.492010] raid6: using avx2x2 recovery algorithm [ 0.493665] ACPI: Added _OSI(Module Device) [ 0.494031] ACPI: Added _OSI(Processor Device) [ 0.494690] ACPI: Added _OSI(3.0 _SCP Extensions) [ 0.495141] ACPI: Added _OSI(Processor Aggregator Device) [ 0.496021] ACPI: Added _OSI(Linux-Dell-Video) [ 0.684056] ACPI: 2 ACPI AML tables successfully acquired and loaded [ 1.165861] ACPI: Interpreter enabled [ 1.166220] ACPI: (supports S0 S3 S4 S5) [ 1.167014] ACPI: Using IOAPIC for interrupt routing [ 1.168222] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug [ 1.171362] ACPI: Enabled 16 GPEs in block 00 to 0F [ 1.694910] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff]) [ 1.695009] acpi PNP0A03:00: _OSC: OS supports [ASPM ClockPM Segments MSI] [ 1.697101] acpi PNP0A03:00: _OSC failed (AE_NOT_FOUND); disabling ASPM [ 1.698169] acpi PNP0A03:00: fail to add MMCONFIG information, can't access extended PCI configuration space under this bridge. [ 1.703407] PCI host bridge to bus 0000:00 [ 1.704023] pci_bus 0000:00: root bus resource [io 0x0000-0x0cf7 window] [ 1.705013] pci_bus 0000:00: root bus resource [io 0x0d00-0xffff window] [ 1.705939] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff window] [ 1.706018] pci_bus 0000:00: root bus resource [mem 0xc0000000-0xfebfffff window] [ 1.708022] pci_bus 0000:00: root bus resource [bus 00-ff] [ 1.740142] pci 0000:00:01.3: quirk: [io 0xb000-0xb03f] claimed by PIIX4 ACPI [ 1.795609] ACPI: PCI Interrupt Link [LNKA] (IRQs 5 *10 11) [ 1.799865] ACPI: PCI Interrupt Link [LNKB] (IRQs 5 *10 11) [ 1.803050] ACPI: PCI Interrupt Link [LNKC] (IRQs 5 10 *11) [ 1.804917] ACPI: PCI Interrupt Link [LNKD] (IRQs 5 10 *11) [ 1.808017] ACPI: PCI Interrupt Link [LNKS] (IRQs *9) [ 2.170953] vgaarb: loaded [ 2.173032] SCSI subsystem initialized [ 2.174816] ACPI: bus type USB registered [ 2.175823] usbcore: registered new interface driver usbfs [ 2.177354] usbcore: registered new interface driver hub [ 2.178217] usbcore: registered new device driver usb [ 2.180495] pps_core: LinuxPPS API ver. 1 registered [ 2.181177] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti [ 2.183121] PTP clock support registered [ 2.184874] EDAC MC: Ver: 3.0.0 [ 2.189254] Advanced Linux Sound Architecture Driver Initialized. [ 2.190581] PCI: Using ACPI for IRQ routing [ 2.194789] Bluetooth: Core ver 2.22 [ 2.195223] NET: Registered protocol family 31 [ 2.196080] Bluetooth: HCI device and connection manager initialized [ 2.197036] Bluetooth: HCI socket layer initialized [ 2.198018] Bluetooth: L2CAP socket layer initialized [ 2.199025] Bluetooth: SCO socket layer initialized [ 2.199772] NET: Registered protocol family 8 [ 2.200011] NET: Registered protocol family 20 [ 2.201199] NetLabel: Initializing [ 2.201861] NetLabel: domain hash size = 128 [ 2.202008] NetLabel: protocols = UNLABELED CIPSOv4 CALIPSO [ 2.203231] NetLabel: unlabeled traffic allowed by default [ 2.205644] nfc: nfc_init: NFC Core ver 0.1 [ 2.206250] NET: Registered protocol family 39 [ 2.208772] clocksource: Switched to clocksource kvm-clock [ 2.684990] VFS: Disk quotas dquot_6.6.0 [ 2.685842] VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes) [ 2.687284] FS-Cache: Loaded [ 2.688526] CacheFiles: Loaded [ 2.689249] pnp: PnP ACPI init [ 2.699961] pnp: PnP ACPI: found 7 devices [ 2.742260] clocksource: acpi_pm: mask: 0xffffff max_cycles: 0xffffff, max_idle_ns: 2085701024 ns [ 2.744405] NET: Registered protocol family 2 [ 2.746736] tcp_listen_portaddr_hash hash table entries: 4096 (order: 6, 294912 bytes) [ 2.748495] TCP established hash table entries: 65536 (order: 7, 524288 bytes) [ 2.751684] TCP bind hash table entries: 65536 (order: 10, 4194304 bytes) [ 2.759292] TCP: Hash tables configured (established 65536 bind 65536) [ 2.760757] UDP hash table entries: 4096 (order: 7, 655360 bytes) [ 2.763331] UDP-Lite hash table entries: 4096 (order: 7, 655360 bytes) [ 2.765575] NET: Registered protocol family 1 [ 2.767720] RPC: Registered named UNIX socket transport module. [ 2.768830] RPC: Registered udp transport module. [ 2.769581] RPC: Registered tcp transport module. [ 2.770269] RPC: Registered tcp NFSv4.1 backchannel transport module. [ 2.772311] NET: Registered protocol family 44 [ 2.773301] pci 0000:00:00.0: Limiting direct PCI/PCI transfers [ 2.774966] PCI-DMA: Using software bounce buffering for IO (SWIOTLB) [ 2.776005] software IO TLB [mem 0xbbff3000-0xbfff3000] (64MB) mapped at [(____ptrval____)-(____ptrval____)] [ 2.778707] RAPL PMU: API unit is 2^-32 Joules, 3 fixed counters, 10737418240 ms ovfl timer [ 2.779936] RAPL PMU: hw unit of domain pp0-core 2^-0 Joules [ 2.780753] RAPL PMU: hw unit of domain package 2^-0 Joules [ 2.781565] RAPL PMU: hw unit of domain dram 2^-16 Joules [ 2.784346] kvm: already loaded the other module [ 2.785464] Machine check injector initialized [ 2.790559] Scanning for low memory corruption every 60 seconds [ 2.826898] Initialise system trusted keyrings [ 2.828698] workingset: timestamp_bits=40 max_order=21 bucket_order=0 [ 2.833669] DLM installed [ 2.836258] NFS: Registering the id_resolver key type [ 2.837321] Key type id_resolver registered [ 2.837946] Key type id_legacy registered [ 2.838696] nfs4filelayout_init: NFSv4 File Layout Driver Registering... [ 2.839795] Installing knfsd (copyright (C) 1996 okir@monad.swb.de). [ 2.842642] ntfs: driver 2.1.32 [Flags: R/W]. [ 2.843943] fuse init (API version 7.27) [ 2.846102] JFS: nTxBlock = 8192, nTxLock = 65536 [ 2.854946] SGI XFS with ACLs, security attributes, realtime, no debug enabled [ 2.858222] 9p: Installing v9fs 9p2000 file system support [ 2.859110] FS-Cache: Netfs '9p' registered for caching [ 2.862894] gfs2: GFS2 installed [ 2.864511] FS-Cache: Netfs 'ceph' registered for caching [ 2.865315] ceph: loaded (mds proto 32) [ 2.894547] NET: Registered protocol family 38 [ 2.896302] async_tx: api initialized (async) [ 2.896982] Key type asymmetric registered [ 2.897746] Asymmetric key parser 'x509' registered [ 2.898636] Key type pkcs7_test registered [ 2.899522] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 250) [ 2.900958] io scheduler noop registered [ 2.901844] io scheduler deadline registered [ 2.902605] io scheduler cfq registered (default) [ 2.903374] io scheduler mq-deadline registered [ 2.904048] io scheduler kyber registered [ 2.904725] io scheduler bfq registered [ 2.909292] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0 [ 2.910593] ACPI: Power Button [PWRF] [ 2.911938] input: Sleep Button as /devices/LNXSYSTM:00/LNXSLPBN:00/input/input1 [ 2.913345] ACPI: Sleep Button [SLPF] [ 2.928581] PCI Interrupt Link [LNKC] enabled at IRQ 11 [ 2.929480] virtio-pci 0000:00:03.0: virtio_pci: leaving for legacy driver [ 2.941270] PCI Interrupt Link [LNKD] enabled at IRQ 10 [ 2.942137] virtio-pci 0000:00:04.0: virtio_pci: leaving for legacy driver [ 2.947772] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled [ 2.971005] 00:03: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A [ 2.997185] 00:04: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A [ 3.022493] 00:05: ttyS2 at I/O 0x3e8 (irq = 6, base_baud = 115200) is a 16550A [ 3.047965] 00:06: ttyS3 at I/O 0x2e8 (irq = 7, base_baud = 115200) is a 16550A [ 3.055407] Non-volatile memory driver v1.3 [ 3.057043] Linux agpgart interface v0.103 [ 3.060924] [drm] radeon kernel modesetting enabled. [ 3.062744] [drm] amdgpu kernel modesetting enabled. [ 3.101960] brd: module loaded [ 3.122530] loop: module loaded [ 3.166575] null: module loaded [ 3.170278] nfcsim 0.2 initialized [ 3.171884] Loading iSCSI transport class v2.0-870. [ 3.189450] scsi host0: Virtio SCSI HBA [ 3.239814] scsi 0:0:1:0: Direct-Access Google PersistentDisk 1 PQ: 0 ANSI: 6 [ 3.570013] random: fast init done [ 3.807312] tsc: Refined TSC clocksource calibration: 2299.803 MHz [ 3.809145] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x21267aeb7b4, max_idle_ns: 440795247387 ns [ 3.998812] sd 0:0:1:0: [sda] 4194304 512-byte logical blocks: (2.15 GB/2.00 GiB) [ 4.000572] sd 0:0:1:0: Attached scsi generic sg0 type 0 [ 4.001073] sd 0:0:1:0: [sda] 4096-byte physical blocks [ 4.001261] sd 0:0:1:0: [sda] Write Protect is off [ 4.004449] sd 0:0:1:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [ 4.011265] Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011) [ 4.016064] sda: sda1 [ 4.028744] sd 0:0:1:0: [sda] Attached SCSI disk [ 4.032480] eql: Equalizer2002: Simon Janes (simon@ncm.com) and David S. Miller (davem@redhat.com) [ 4.039962] MACsec IEEE 802.1AE [ 4.041474] tun: Universal TUN/TAP device driver, 1.6 [ 4.068367] vcan: Virtual CAN interface driver [ 4.069581] vxcan: Virtual CAN Tunnel driver [ 4.070963] slcan: serial line CAN interface driver [ 4.072500] slcan: 10 dynamic interface channels. [ 4.073947] CAN device driver interface [ 4.075517] enic: Cisco VIC Ethernet NIC Driver, ver 2.3.0.53 [ 4.077354] e100: Intel(R) PRO/100 Network Driver, 3.5.24-k2-NAPI [ 4.079145] e100: Copyright(c) 1999-2006 Intel Corporation [ 4.080746] e1000: Intel(R) PRO/1000 Network Driver - version 7.3.21-k8-NAPI [ 4.082819] e1000: Copyright (c) 1999-2006 Intel Corporation. [ 4.084608] e1000e: Intel(R) PRO/1000 Network Driver - 3.2.6-k [ 4.086280] e1000e: Copyright(c) 1999 - 2015 Intel Corporation. [ 4.088260] sky2: driver version 1.30 [ 4.090456] PPP generic driver version 2.4.2 [ 4.092350] PPP BSD Compression module registered [ 4.093726] PPP Deflate Compression module registered [ 4.095138] PPP MPPE Compression module registered [ 4.096543] NET: Registered protocol family 24 [ 4.098038] PPTP driver version 0.8.5 [ 4.099808] mac80211_hwsim: initializing netlink [ 4.113988] usbcore: registered new interface driver asix [ 4.115746] usbcore: registered new interface driver ax88179_178a [ 4.117608] usbcore: registered new interface driver cdc_ether [ 4.119474] usbcore: registered new interface driver net1080 [ 4.121195] usbcore: registered new interface driver cdc_subset [ 4.122980] usbcore: registered new interface driver zaurus [ 4.124708] usbcore: registered new interface driver cdc_ncm [ 4.132814] aoe: AoE v85 initialised. [ 4.135211] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver [ 4.137193] ehci-pci: EHCI PCI platform driver [ 4.138627] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver [ 4.140505] ohci-pci: OHCI PCI platform driver [ 4.142050] uhci_hcd: USB Universal Host Controller Interface driver [ 4.144471] usbcore: registered new interface driver usblp [ 4.146194] usbcore: registered new interface driver usb-storage [ 4.148971] i8042: PNP: PS/2 Controller [PNP0303:KBD,PNP0f13:MOU] at 0x60,0x64 irq 1,12 [ 4.152062] i8042: Warning: Keylock active [ 4.154888] serio: i8042 KBD port at 0x60,0x64 irq 1 [ 4.156359] serio: i8042 AUX port at 0x60,0x64 irq 12 [ 4.159716] mousedev: PS/2 mouse device common for all mice [ 4.164221] rtc_cmos 00:00: RTC can wake from S4 [ 4.166924] rtc_cmos 00:00: registered as rtc0 [ 4.168292] rtc_cmos 00:00: nvmem registration failed [ 4.169824] rtc_cmos 00:00: alarms up to one day, 114 bytes nvram [ 4.171922] i2c /dev entries driver [ 4.175110] piix4_smbus 0000:00:01.3: SMBus base address uninitialized - upgrade BIOS or use force_addr=0xaddr [ 4.177982] i2c-parport-light: adapter type unspecified [ 4.179584] usbcore: registered new interface driver RobotFuzz Open Source InterFace, OSIF [ 4.182149] usbcore: registered new interface driver i2c-tiny-usb [ 4.186059] device-mapper: ioctl: 4.39.0-ioctl (2018-04-03) initialised: dm-devel@redhat.com [ 4.189223] device-mapper: raid: Loading target version 1.13.2 [ 4.191580] usbcore: registered new interface driver btusb [ 4.194781] usnic_verbs: Cisco VIC (USNIC) Verbs Driver v1.0.3 (December 19, 2013) [ 4.197131] usnic_verbs:usnic_uiom_init:585: [ 4.197137] IOMMU required but not present or enabled. USNIC QPs will not function w/o enabling IOMMU [ 4.201194] usnic_verbs:usnic_ib_init:649: [ 4.201199] Unable to initalize umem with err -1 [ 4.204983] iscsi: registered transport (iser) [ 4.206371] OPA Virtual Network Driver - v1.0 [ 4.214634] hidraw: raw HID events driver (C) Jiri Kosina [ 4.222352] ================================================================== [ 4.223041] BUG: KASAN: use-after-free in call_usermodehelper_exec_work+0x2d3/0x310 [ 4.223041] Write of size 4 at addr ffff8801ce02b670 by task kworker/u4:0/7 [ 4.223041] [ 4.223041] CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 4.17.0+ #92 [ 4.223041] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 4.223041] Workqueue: events_unbound call_usermodehelper_exec_work [ 4.223041] Call Trace: [ 4.223041] dump_stack+0x1b9/0x294 [ 4.223041] ? dump_stack_print_info.cold.2+0x52/0x52 [ 4.223041] ? printk+0x9e/0xba [ 4.223041] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 4.223041] ? kasan_check_write+0x14/0x20 [ 4.223041] print_address_description+0x6c/0x20b [ 4.223041] ? call_usermodehelper_exec_work+0x2d3/0x310 [ 4.223041] kasan_report.cold.7+0x242/0x2fe [ 4.223041] __asan_report_store4_noabort+0x17/0x20 [ 4.223041] call_usermodehelper_exec_work+0x2d3/0x310 [ 4.223041] ? call_usermodehelper_exec_async+0x9e0/0x9e0 [ 4.223041] process_one_work+0xc64/0x1b70 [ 4.223041] ? finish_task_switch+0x28b/0x840 [ 4.223041] ? pwq_dec_nr_in_flight+0x490/0x490 [ 4.223041] ? __schedule+0x809/0x1e30 [ 4.223041] ? graph_lock+0x170/0x170 [ 4.223041] ? lock_downgrade+0x8e0/0x8e0 [ 4.223041] ? find_held_lock+0x36/0x1c0 [ 4.223041] ? lock_acquire+0x1dc/0x520 [ 4.223041] ? worker_thread+0x3d4/0x13a0 [ 4.223041] ? lock_downgrade+0x8e0/0x8e0 [ 4.223041] ? lock_release+0xa10/0xa10 [ 4.223041] ? kasan_check_read+0x11/0x20 [ 4.223041] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 4.223041] worker_thread+0x181/0x13a0 [ 4.223041] ? process_one_work+0x1b70/0x1b70 [ 4.223041] ? graph_lock+0x170/0x170 [ 4.223041] ? find_held_lock+0x36/0x1c0 [ 4.223041] ? find_held_lock+0x36/0x1c0 [ 4.223041] ? schedule+0xef/0x430 [ 4.223041] ? __schedule+0x1e30/0x1e30 [ 4.223041] ? do_raw_spin_unlock+0x9e/0x2e0 [ 4.223041] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 4.223041] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 4.223041] ? __kthread_parkme+0x111/0x1d0 [ 4.223041] ? parse_args.cold.15+0x1b3/0x1b3 [ 4.223041] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 4.223041] ? trace_hardirqs_on+0xd/0x10 [ 4.223041] kthread+0x345/0x410 [ 4.223041] ? process_one_work+0x1b70/0x1b70 [ 4.223041] ? kthread_bind+0x40/0x40 [ 4.223041] ret_from_fork+0x3a/0x50 [ 4.223041] [ 4.223041] Allocated by task 1: [ 4.223041] save_stack+0x43/0xd0 [ 4.223041] kasan_kmalloc+0xc4/0xe0 [ 4.223041] kmem_cache_alloc_trace+0x152/0x780 [ 4.223041] call_usermodehelper_setup+0xe8/0x400 [ 4.223041] kobject_uevent_env+0xb21/0x1110 [ 4.223041] kobject_uevent+0x1f/0x30 [ 4.223041] driver_register+0x27c/0x320 [ 4.223041] __hid_register_driver+0x1b9/0x2a0 [ 4.223041] ts_driver_init+0x1e/0x20 [ 4.223041] do_one_initcall+0x127/0x913 [ 4.223041] kernel_init_freeable+0x49b/0x58e [ 4.223041] kernel_init+0x11/0x1b3 [ 4.223041] ret_from_fork+0x3a/0x50 [ 4.223041] [ 4.223041] Freed by task 2077: [ 4.223041] save_stack+0x43/0xd0 [ 4.223041] __kasan_slab_free+0x11a/0x170 [ 4.223041] kasan_slab_free+0xe/0x10 [ 4.223041] kfree+0xd9/0x260 [ 4.223041] umh_complete+0x7b/0x90 [ 4.223041] call_usermodehelper_exec_async+0x6e8/0x9e0 [ 4.223041] ret_from_fork+0x3a/0x50 [ 4.223041] [ 4.223041] The buggy address belongs to the object at ffff8801ce02b600 [ 4.223041] which belongs to the cache kmalloc-192 of size 192 [ 4.223041] The buggy address is located 112 bytes inside of [ 4.223041] 192-byte region [ffff8801ce02b600, ffff8801ce02b6c0) [ 4.223041] The buggy address belongs to the page: [ 4.223041] page:ffffea0007380ac0 count:1 mapcount:0 mapping:ffff8801da800040 index:0x0 [ 4.223041] flags: 0x2fffc0000000100(slab) [ 4.223041] raw: 02fffc0000000100 ffffea0007399488 ffff8801da801148 ffff8801da800040 [ 4.223041] raw: 0000000000000000 ffff8801ce02b000 0000000100000010 0000000000000000 [ 4.223041] page dumped because: kasan: bad access detected [ 4.223041] [ 4.223041] Memory state around the buggy address: [ 4.223041] ffff8801ce02b500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 4.223041] ffff8801ce02b580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 4.223041] >ffff8801ce02b600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 4.223041] ^ [ 4.223041] ffff8801ce02b680: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 4.223041] ffff8801ce02b700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 4.223041] ================================================================== [ 4.223041] Disabling lock debugging due to kernel taint [ 4.349674] Kernel panic - not syncing: panic_on_warn set ... [ 4.349674] [ 4.350679] usbcore: registered new interface driver usbhid [ 4.350650] CPU: 1 PID: 7 Comm: kworker/u4:0 Tainted: G B 4.17.0+ #92 [ 4.350650] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 4.350650] Workqueue: events_unbound call_usermodehelper_exec_work [ 4.353205] usbhid: USB HID core driver [ 4.350650] Call Trace: [ 4.350650] dump_stack+0x1b9/0x294 [ 4.350650] ? dump_stack_print_info.cold.2+0x52/0x52 [ 4.359147] NET: Registered protocol family 40 [ 4.358673] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 4.361891] ashmem: initialized [ 4.361062] ? call_usermodehelper_exec_work+0x290/0x310 [ 4.361062] panic+0x22f/0x4de [ 4.368596] ? add_taint.cold.5+0x16/0x16 [ 4.370126] ? do_raw_spin_unlock+0x9e/0x2e0 [ 4.371516] ? do_raw_spin_unlock+0x9e/0x2e0 [ 4.371516] ? call_usermodehelper_exec_work+0x2d3/0x310 [ 4.371516] kasan_end_report+0x47/0x4f [ 4.371516] kasan_report.cold.7+0x76/0x2fe [ 4.371516] __asan_report_store4_noabort+0x17/0x20 [ 4.371516] call_usermodehelper_exec_work+0x2d3/0x310 [ 4.371516] ? call_usermodehelper_exec_async+0x9e0/0x9e0 [ 4.371516] process_one_work+0xc64/0x1b70 [ 4.371516] ? finish_task_switch+0x28b/0x840 [ 4.371516] ? pwq_dec_nr_in_flight+0x490/0x490 [ 4.384037] ? __schedule+0x809/0x1e30 [ 4.384037] ? graph_lock+0x170/0x170 [ 4.384037] ? lock_downgrade+0x8e0/0x8e0 [ 4.384037] ? find_held_lock+0x36/0x1c0 [ 4.384037] ? lock_acquire+0x1dc/0x520 [ 4.384037] ? worker_thread+0x3d4/0x13a0 [ 4.384037] ? lock_downgrade+0x8e0/0x8e0 [ 4.384037] ? lock_release+0xa10/0xa10 [ 4.384037] ? kasan_check_read+0x11/0x20 [ 4.384037] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 4.384037] worker_thread+0x181/0x13a0 [ 4.384037] ? process_one_work+0x1b70/0x1b70 [ 4.384037] ? graph_lock+0x170/0x170 [ 4.384037] ? find_held_lock+0x36/0x1c0 [ 4.384037] ? find_held_lock+0x36/0x1c0 [ 4.384037] ? schedule+0xef/0x430 [ 4.384037] ? __schedule+0x1e30/0x1e30 [ 4.384037] ? do_raw_spin_unlock+0x9e/0x2e0 [ 4.384037] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 4.384037] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 4.384037] ? __kthread_parkme+0x111/0x1d0 [ 4.384037] ? parse_args.cold.15+0x1b3/0x1b3 [ 4.384037] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 4.410019] ? trace_hardirqs_on+0xd/0x10 [ 4.410019] kthread+0x345/0x410 [ 4.410019] ? process_one_work+0x1b70/0x1b70 [ 4.410019] ? kthread_bind+0x40/0x40 [ 4.410019] ret_from_fork+0x3a/0x50 [ 4.410019] Dumping ftrace buffer: [ 4.410019] (ftrace buffer empty) [ 4.410019] Kernel Offset: disabled [ 4.410019] Rebooting in 86400 seconds..