================================================================== BUG: KASAN: stack-out-of-bounds in lookup_object lib/debugobjects.c:157 [inline] BUG: KASAN: stack-out-of-bounds in debug_object_deactivate+0x425/0x450 lib/debugobjects.c:540 Read of size 8 at addr ffff8801ca8254e8 by task swapper/0/0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.18.0-rc3+ #45 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 print_address_description+0x6c/0x20b mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 lookup_object lib/debugobjects.c:157 [inline] debug_object_deactivate+0x425/0x450 lib/debugobjects.c:540 debug_timer_deactivate kernel/time/timer.c:714 [inline] debug_deactivate kernel/time/timer.c:770 [inline] detach_timer kernel/time/timer.c:815 [inline] expire_timers kernel/time/timer.c:1353 [inline] __run_timers+0x571/0xc70 kernel/time/timer.c:1666 run_timer_softirq+0x4c/0x70 kernel/time/timer.c:1692 __do_softirq+0x2e8/0xb17 kernel/softirq.c:288 ? __sanitizer_cov_trace_const_cmp4+SeaBIOS (version 1.8.2-20171130_102032-google) Linux version 4.18.0-rc3+ (syzkaller@ci) (gcc version 8.0.1 20180413 (experimental) (GCC)) #45 SMP Wed Jul 4 07:02:20 UTC 2018 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 x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers' x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers' x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers' x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256 x86/fpu: Enabled xstate features 0x7, context size is 832 bytes, using 'standard' format. BIOS-provided physical RAM map: BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usable BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff] reserved BIOS-e820: [mem 0x00000000000f0000-0x00000000000fffff] reserved BIOS-e820: [mem 0x0000000000100000-0x00000000bfff2fff] usable BIOS-e820: [mem 0x00000000bfff3000-0x00000000bfffffff] reserved BIOS-e820: [mem 0x00000000fffbc000-0x00000000ffffffff] reserved BIOS-e820: [mem 0x0000000100000000-0x000000021fffffff] usable bootconsole [earlyser0] enabled Malformed early option 'vsyscall' nopcid: PCID feature disabled NX (Execute Disable) protection: active SMBIOS 2.4 present. DMI: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Hypervisor detected: KVM last_pfn = 0x220000 max_arch_pfn = 0x400000000 x86/PAT: Configuration [0-7]: WB WC UC- UC WB WP UC- WT last_pfn = 0xbfff3 max_arch_pfn = 0x400000000 found SMP MP-table at [mem 0x000f2310-0x000f231f] mapped at [(____ptrval____)] Scanning 1 areas for low memory corruption Using GB pages for direct mapping ACPI: Early table checksum verification disabled ACPI: RSDP 0x00000000000F22D0 000014 (v00 Google) ACPI: RSDT 0x00000000BFFF3430 000038 (v01 Google GOOGRSDT 00000001 GOOG 00000001) ACPI: FACP 0x00000000BFFFCF60 0000F4 (v02 Google GOOGFACP 00000001 GOOG 00000001) ACPI: DSDT 0x00000000BFFF3470 0017B2 (v01 Google GOOGDSDT 00000001 GOOG 00000001) ACPI: FACS 0x00000000BFFFCF00 000040 ACPI: FACS 0x00000000BFFFCF00 000040 ACPI: SSDT 0x00000000BFFF65F0 00690D (v01 Google GOOGSSDT 00000001 GOOG 00000001) ACPI: APIC 0x00000000BFFF5D10 000076 (v01 Google GOOGAPIC 00000001 GOOG 00000001) ACPI: WAET 0x00000000BFFF5CE0 000028 (v01 Google GOOGWAET 00000001 GOOG 00000001) ACPI: SRAT 0x00000000BFFF4C30 0000C8 (v01 Google GOOGSRAT 00000001 GOOG 00000001) SRAT: PXM 0 -> APIC 0x00 -> Node 0 SRAT: PXM 0 -> APIC 0x01 -> Node 0 ACPI: SRAT: Node 0 PXM 0 [mem 0x00000000-0x0009ffff] ACPI: SRAT: Node 0 PXM 0 [mem 0x00100000-0xbfffffff] ACPI: SRAT: Node 0 PXM 0 [mem 0x100000000-0x21fffffff] NUMA: Node 0 [mem 0x00000000-0x0009ffff] + [mem 0x00100000-0xbfffffff] -> [mem 0x00000000-0xbfffffff] NUMA: Node 0 [mem 0x00000000-0xbfffffff] + [mem 0x100000000-0x21fffffff] -> [mem 0x00000000-0x21fffffff] NODE_DATA(0) allocated [mem 0x21fffa000-0x21fffdfff] kvm-clock: cpu 0, msr 2:1fff8001, primary cpu clock kvm-clock: Using msrs 4b564d01 and 4b564d00 kvm-clock: using sched offset of 5084926845 cycles clocksource: kvm-clock: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns Zone ranges: DMA [mem 0x0000000000001000-0x0000000000ffffff] DMA32 [mem 0x0000000001000000-0x00000000ffffffff] Normal [mem 0x0000000100000000-0x000000021fffffff] Movable zone start for each node Early memory node ranges node 0: [mem 0x0000000000001000-0x000000000009efff] node 0: [mem 0x0000000000100000-0x00000000bfff2fff] node 0: [mem 0x0000000100000000-0x000000021fffffff] Initmem setup node 0 [mem 0x0000000000001000-0x000000021fffffff] Reserved but unavailable: 111 pages kasan: KernelAddressSanitizer initialized ACPI: PM-Timer IO Port: 0xb008 ACPI: LAPIC_NMI (acpi_id[0xff] dfl dfl lint[0x1]) IOAPIC[0]: apic_id 0, version 17, address 0xfec00000, GSI 0-23 ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level) ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level) ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level) ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level) Using ACPI (MADT) for SMP configuration information smpboot: Allowing 2 CPUs, 0 hotplug CPUs PM: Registered nosave memory: [mem 0x00000000-0x00000fff] PM: Registered nosave memory: [mem 0x0009f000-0x0009ffff] PM: Registered nosave memory: [mem 0x000a0000-0x000effff] PM: Registered nosave memory: [mem 0x000f0000-0x000fffff] PM: Registered nosave memory: [mem 0xbfff3000-0xbfffffff] PM: Registered nosave memory: [mem 0xc0000000-0xfffbbfff] PM: Registered nosave memory: [mem 0xfffbc000-0xffffffff] [mem 0xc0000000-0xfffbbfff] available for PCI devices Booting paravirtualized kernel on KVM clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1910969940391419 ns random: get_random_bytes called from boot_init_stack_canary arch/x86/include/asm/stackprotector.h:75 [inline] with crng_init=0 random: get_random_bytes called from start_kernel+0x112/0x949 init/main.c:559 with crng_init=0 setup_percpu: NR_CPUS:64 nr_cpumask_bits:64 nr_cpu_ids:2 nr_node_ids:1 percpu: Embedded 56 pages/cpu @(____ptrval____) s188616 r8192 d32568 u1048576 Built 1 zonelists, mobility grouping on. Total pages: 1935228 Policy zone: Normal 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 Memory: 6499788K/7863876K available (110620K kernel code, 12321K rwdata, 16056K rodata, 3968K init, 23144K bss, 1364088K reserved, 0K cma-reserved) Running RCU self tests Hierarchical RCU implementation. RCU lockdep checking is enabled. RCU restricting CPUs from NR_CPUS=64 to nr_cpu_ids=2. RCU callback double-/use-after-free debug enabled. RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2 NR_IRQS: 4352, nr_irqs: 440, preallocated irqs: 16 Console: colour VGA+ 80x25 console [ttyS0] enabled console [ttyS0] enabled bootconsole [earlyser0] disabled bootconsole [earlyser0] disabled Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar ... MAX_LOCKDEP_SUBCLASSES: 8 ... MAX_LOCK_DEPTH: 48 ... MAX_LOCKDEP_KEYS: 8191 ... CLASSHASH_SIZE: 4096 ... MAX_LOCKDEP_ENTRIES: 32768 ... MAX_LOCKDEP_CHAINS: 65536 ... CHAINHASH_SIZE: 32768 memory used by lock dependency info: 7391 kB per task-struct memory footprint: 1920 bytes ACPI: Core revision 20180531 APIC: Switch to symmetric I/O mode setup x2apic enabled Switched APIC routing to physical x2apic. ..TIMER: vector=0x30 apic1=0 pin1=0 apic2=-1 pin2=-1 tsc: Detected 2300.000 MHz processor clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x212735223b2, max_idle_ns: 440795277976 ns Calibrating delay loop (skipped) preset value.. 4600.00 BogoMIPS (lpj=2300000) pid_max: default: 32768 minimum: 301 Security Framework initialized Yama: becoming mindful. SELinux: Initializing. AppArmor: AppArmor disabled by boot time parameter Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes) Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes) Mount-cache hash table entries: 16384 (order: 5, 131072 bytes) Mountpoint-cache hash table entries: 16384 (order: 5, 131072 bytes) CPU: Physical Processor ID: 0 mce: CPU supports 32 MCE banks Last level iTLB entries: 4KB 1024, 2MB 1024, 4MB 1024 Last level dTLB entries: 4KB 1024, 2MB 1024, 4MB 1024, 1GB 4 Spectre V2 : Mitigation: Full generic retpoline Speculative Store Bypass: Vulnerable Freeing SMP alternatives memory: 64K smpboot: CPU0: Intel(R) Xeon(R) CPU @ 2.30GHz (family: 0x6, model: 0x3f, stepping: 0x0) Performance Events: unsupported p6 CPU model 63 no PMU driver, software events only. Hierarchical SRCU implementation. NMI watchdog: Perf event create on CPU 0 failed with -2 NMI watchdog: Perf NMI watchdog permanently disabled smp: Bringing up secondary CPUs ... x86: Booting SMP configuration: .... node #0, CPUs: #1 kvm-clock: cpu 1, msr 2:1fff8041, secondary cpu clock smp: Brought up 1 node, 2 CPUs smpboot: Max logical packages: 1 smpboot: Total of 2 processors activated (9200.00 BogoMIPS) devtmpfs: initialized kworker/u4:0 (24) used greatest stack depth: 24072 bytes left clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1911260446275000 ns futex hash table entries: 512 (order: 4, 65536 bytes) xor: automatically using best checksumming function avx RTC time: 1:09:13, date: 07/05/18 NET: Registered protocol family 16 audit: initializing netlink subsys (disabled) audit: type=2000 audit(1530752952.920:1): state=initialized audit_enabled=0 res=1 kworker/u4:1 (40) used greatest stack depth: 23840 bytes left cpuidle: using governor menu ACPI: bus type PCI registered PCI: Using configuration type 1 for base access kworker/u4:3 (167) used greatest stack depth: 21704 bytes left HugeTLB registered 2.00 MiB page size, pre-allocated 0 pages cryptd: max_cpu_qlen set to 1000 raid6: sse2x1 gen() 1707 MB/s raid6: sse2x1 xor() 1011 MB/s raid6: sse2x2 gen() 3695 MB/s raid6: sse2x2 xor() 1945 MB/s raid6: sse2x4 gen() 6042 MB/s raid6: sse2x4 xor() 3408 MB/s raid6: avx2x1 gen() 968 MB/s raid6: avx2x1 xor() 1904 MB/s raid6: avx2x2 gen() 4250 MB/s raid6: avx2x2 xor() 3867 MB/s raid6: avx2x4 gen() 11429 MB/s raid6: avx2x4 xor() 5939 MB/s raid6: using algorithm avx2x4 gen() 11429 MB/s raid6: .... xor() 5939 MB/s, rmw enabled raid6: using avx2x2 recovery algorithm ACPI: Added _OSI(Module Device) ACPI: Added _OSI(Processor Device) ACPI: Added _OSI(3.0 _SCP Extensions) ACPI: Added _OSI(Processor Aggregator Device) ACPI: Added _OSI(Linux-Dell-Video) ACPI: 2 ACPI AML tables successfully acquired and loaded ACPI: Interpreter enabled ACPI: (supports S0 S3 S4 S5) ACPI: Using IOAPIC for interrupt routing PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug ACPI: Enabled 16 GPEs in block 00 to 0F ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff]) acpi PNP0A03:00: _OSC: OS supports [ASPM ClockPM Segments MSI] acpi PNP0A03:00: _OSC failed (AE_NOT_FOUND); disabling ASPM acpi PNP0A03:00: fail to add MMCONFIG information, can't access extended PCI configuration space under this bridge. PCI host bridge to bus 0000:00 pci_bus 0000:00: root bus resource [io 0x0000-0x0cf7 window] pci_bus 0000:00: root bus resource [io 0x0d00-0xffff window] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff window] pci_bus 0000:00: root bus resource [mem 0xc0000000-0xfebfffff window] pci_bus 0000:00: root bus resource [bus 00-ff] pci 0000:00:01.3: quirk: [io 0xb000-0xb03f] claimed by PIIX4 ACPI ACPI: PCI Interrupt Link [LNKA] (IRQs 5 *10 11) ACPI: PCI Interrupt Link [LNKB] (IRQs 5 *10 11) ACPI: PCI Interrupt Link [LNKC] (IRQs 5 10 *11) ACPI: PCI Interrupt Link [LNKD] (IRQs 5 10 *11) ACPI: PCI Interrupt Link [LNKS] (IRQs *9) vgaarb: loaded SCSI subsystem initialized ACPI: bus type USB registered usbcore: registered new interface driver usbfs usbcore: registered new interface driver hub usbcore: registered new device driver usb pps_core: LinuxPPS API ver. 1 registered pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti PTP clock support registered EDAC MC: Ver: 3.0.0 Advanced Linux Sound Architecture Driver Initialized. PCI: Using ACPI for IRQ routing Bluetooth: Core ver 2.22 NET: Registered protocol family 31 Bluetooth: HCI device and connection manager initialized Bluetooth: HCI socket layer initialized Bluetooth: L2CAP socket layer initialized Bluetooth: SCO socket layer initialized NET: Registered protocol family 8 NET: Registered protocol family 20 NetLabel: Initializing NetLabel: domain hash size = 128 NetLabel: protocols = UNLABELED CIPSOv4 CALIPSO NetLabel: unlabeled traffic allowed by default