[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 22.170616] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 27.745908] random: sshd: uninitialized urandom read (32 bytes read, 43 bits of entropy available) [ 28.328545] random: sshd: uninitialized urandom read (32 bytes read, 43 bits of entropy available) [ 29.740253] random: sshd: uninitialized urandom read (32 bytes read, 114 bits of entropy available) [ 29.897359] random: sshd: uninitialized urandom read (32 bytes read, 116 bits of entropy available) Warning: Permanently added '10.128.10.29' (ECDSA) to the list of known hosts. [ 35.516781] random: sshd: uninitialized urandom read (32 bytes read, 121 bits of entropy available) 2018/07/17 20:14:42 parsed 1 programs [ 37.250457] random: cc1: uninitialized urandom read (8 bytes read, 123 bits of entropy available) 2018/07/17 20:14:44 executed programs: 0 [ 38.515889] IPVS: Creating netns size=2552 id=1 [ 38.603383] IPVS: Creating netns size=2552 id=2 [ 38.667224] IPVS: Creating netns size=2552 id=3 [ 38.756156] IPVS: Creating netns size=2552 id=4 [ 38.863931] IPVS: Creating netns size=2552 id=5 [ 38.979983] IPVS: Creating netns size=2552 id=6 [ 39.105058] IPVS: Creating netns size=2552 id=7 [ 39.290649] IPVS: Creating netns size=2552 id=8 [ 40.625356] random: nonblocking pool is initialized 2018/07/17 20:14:49 executed programs: 178 2018/07/17 20:14:54 executed programs: 404 [ 49.784699] ================================================================== [ 49.792245] BUG: KASAN: use-after-free in __lock_acquire+0x3c66/0x5270 [ 49.798935] Read of size 8 at addr ffff8801d88b66a0 by task syz-executor2/5865 [ 49.806283] [ 49.807901] CPU: 0 PID: 5865 Comm: syz-executor2 Not tainted 4.4.141-gb1bad9e #5 [ 49.815424] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.824774] 0000000000000000 e233a5f14d691a8b ffff8800b909fa30 ffffffff81e0e16d [ 49.832818] ffffea0007622c00 ffff8801d88b66a0 0000000000000000 ffff8801d88b66a0 [ 49.840852] 0000000000000000 ffff8800b909fa68 ffffffff81515a76 ffff8801d88b66a0 [ 49.848881] Call Trace: [ 49.851469] [] dump_stack+0xc1/0x124 [ 49.856854] [] print_address_description+0x6c/0x216 [ 49.863518] [] kasan_report.cold.7+0x175/0x2f7 [ 49.869748] [] ? __lock_acquire+0x3c66/0x5270 [ 49.875888] [] __asan_report_load8_noabort+0x14/0x20 [ 49.882665] [] __lock_acquire+0x3c66/0x5270 [ 49.888631] [] ? dput+0x1f/0x30 [ 49.893549] [] ? __fput+0x401/0x6f0 [ 49.898813] [] ? ____fput+0x15/0x20 [ 49.904111] [] ? task_work_run+0x10f/0x190 [ 49.910000] [] ? exit_to_usermode_loop+0x13d/0x160 [ 49.916584] [] ? __lock_acquire+0xa86/0x5270 [ 49.922651] [] ? debug_check_no_locks_freed+0x210/0x210 [ 49.929674] [] ? debug_check_no_locks_freed+0x210/0x210 [ 49.936695] [] ? debug_check_no_obj_freed+0x2ec/0x940 [ 49.943543] [] lock_acquire+0x15e/0x450 [ 49.949181] [] ? lock_sock_nested+0x43/0x120 [ 49.955236] [] ? get_parent_ip+0xd/0x50 [ 49.960858] [] ? sock_release+0x1c0/0x1c0 [ 49.966643] [] _raw_spin_lock_bh+0x3a/0x50 [ 49.972518] [] ? lock_sock_nested+0x43/0x120 [ 49.978562] [] lock_sock_nested+0x43/0x120 [ 49.984443] [] pppol2tp_release+0x50/0x310 [ 49.990319] [] sock_release+0x96/0x1c0 [ 49.995835] [] sock_close+0x16/0x20 [ 50.001100] [] __fput+0x235/0x6f0 [ 50.006188] [] ____fput+0x15/0x20 [ 50.011272] [] task_work_run+0x10f/0x190 [ 50.016960] [] exit_to_usermode_loop+0x13d/0x160 [ 50.023348] [] do_fast_syscall_32+0x620/0x8b0 [ 50.029475] [] sysenter_flags_fixed+0xd/0x17 [ 50.035507] [ 50.037110] Allocated by task 5867: [ 50.040708] [] save_stack_trace+0x26/0x50 [ 50.046610] [] save_stack+0x43/0xd0 [ 50.052001] [] kasan_kmalloc+0xc7/0xe0 [ 50.057663] [] __kmalloc+0x124/0x310 [ 50.063138] [] sk_prot_alloc+0x204/0x300 [ 50.068973] [] sk_alloc+0x3a/0x3a0 [ 50.074272] [] pppol2tp_create+0x33/0x1f0 [ 50.080186] [] pppox_create+0xf6/0x200 [ 50.085831] [] __sock_create+0x2f0/0x5f0 [ 50.091658] [] SyS_socket+0xf0/0x1b0 [ 50.097126] [] do_fast_syscall_32+0x326/0x8b0 [ 50.103397] [] sysenter_flags_fixed+0xd/0x17 [ 50.109564] [ 50.111175] Freed by task 5865: [ 50.114424] [] save_stack_trace+0x26/0x50 [ 50.120333] [] save_stack+0x43/0xd0 [ 50.125714] [] kasan_slab_free+0x72/0xc0 [ 50.131556] [] kfree+0xf4/0x310 [ 50.136584] [] sk_destruct+0x407/0x4c0 [ 50.142222] [] __sk_free+0x4f/0x220 [ 50.147608] [] sk_free+0x30/0x40 [ 50.152722] [] pppol2tp_session_sock_put+0x5f/0x70 [ 50.159423] [] l2tp_tunnel_closeall+0x23c/0x350 [ 50.165869] [] l2tp_udp_encap_destroy+0x8b/0xf0 [ 50.172336] [] udpv6_destroy_sock+0xb1/0xd0 [ 50.178443] [] sk_common_release+0x6d/0x300 [ 50.184534] [] udp_lib_close+0x15/0x20 [ 50.190173] [] inet_release+0xff/0x1d0 [ 50.195846] [] inet6_release+0x50/0x70 [ 50.201483] [] sock_release+0x96/0x1c0 [ 50.207137] [] sock_close+0x16/0x20 [ 50.212522] [] __fput+0x235/0x6f0 [ 50.217733] [] ____fput+0x15/0x20 [ 50.222939] [] task_work_run+0x10f/0x190 [ 50.228759] [] exit_to_usermode_loop+0x13d/0x160 [ 50.235267] [] do_fast_syscall_32+0x620/0x8b0 [ 50.241527] [] sysenter_flags_fixed+0xd/0x17 [ 50.247704] [ 50.249312] The buggy address belongs to the object at ffff8801d88b6600 [ 50.249312] which belongs to the cache kmalloc-2048 of size 2048 [ 50.262121] The buggy address is located 160 bytes inside of [ 50.262121] 2048-byte region [ffff8801d88b6600, ffff8801d88b6e00) [ 50.274058] The buggy address belongs to the page: [ 50.290085] kasan: CONFIG_KASAN_INLINE enabled [ 50.294599] kasan: GPF could be caused by NULL-ptr deref or user memory access[ 50.302097] ------------[ cut here ]------------ [ 50.306877] WARNING: CPU: 1 PID: 3866 at kernel/sched/core.c:7950 __might_sleep+0x138/0x1a0() [ 50.315557] do not call blockiSeaBIOS (version 1.8.2-20171012_061934-google) Total RAM Size = 0x00000001e0000000 = 7680 MiB CPUs found: 2 Max CPUs supported: 256 found virtio-scsi at 0:3 virtio-scsi vendor='Google' product='PersistentDisk' rev='1' type=0 removable=0 virtio-scsi blksize=512 sectors=4194304 = 2048 MiB drive 0x000f2290: PCHS=0/0/0 translation=lba LCHS=520/128/63 s=4194304 Booting from Hard Disk 0... early console in decompress_kernel input_data: 0x0000000003b5126e input_len: 0x00000000014cc1ea output: 0x0000000001000000 output_len: 0x0000000004008a90 run_size: 0x0000000005752000 Decompressing Linux... Parsing ELF... done. Booting the kernel. [ 0.000000] Initializing cgroup subsys cpuset [ 0.000000] Initializing cgroup subsys cpu [ 0.000000] Initializing cgroup subsys cpuacct [ 0.000000] Initializing cgroup subsys schedtune [ 0.000000] Linux version 4.4.141-gb1bad9e (syzkaller@ci) (gcc version 8.0.1 20180413 (experimental) (GCC) ) #5 SMP PREEMPT Tue Jul 17 10:51:17 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 workqueue.watchdog_thresh=140 nopti [ 0.000000] KERNEL supported cpus: [ 0.000000] Intel GenuineIntel [ 0.000000] AMD AuthenticAMD [ 0.000000] Centaur CentaurHauls [ 0.000000] x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256 [ 0.000000] x86/fpu: Supporting XSAVE feature 0x01: 'x87 floating point registers' [ 0.000000] x86/fpu: Supporting XSAVE feature 0x02: 'SSE registers' [ 0.000000] x86/fpu: Supporting XSAVE feature 0x04: 'AVX registers' [ 0.000000] x86/fpu: Enabled xstate features 0x7, context size is 832 bytes, using 'standard' format. [ 0.000000] e820: 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] NX (Execute Disable) protection: active [ 0.000000] SMBIOS 2.4 present. [ 0.000000] Hypervisor detected: KVM [ 0.000000] Kernel/User page tables isolation: disabled [ 0.000000] e820: last_pfn = 0x220000 max_arch_pfn = 0x400000000 [ 0.000000] x86/PAT: Configuration [0-7]: WB WC UC- UC WB WC UC- WT [ 0.000000] e820: last_pfn = 0xbfff3 max_arch_pfn = 0x400000000 [ 0.000000] found SMP MP-table at [mem 0x000f2310-0x000f231f] mapped at [ffff8800000f2310] [ 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 0x00000000000F22D0 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] kvm-clock: Using msrs 4b564d01 and 4b564d00 [ 0.000000] kvm-clock: cpu 0, msr 2:1fffd001, primary cpu clock [ 0.000000] kvm-clock: using sched offset of 2056534282 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] 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] e820: [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: 19112604462750000 ns [ 0.000000] setup_percpu: NR_CPUS:64 nr_cpumask_bits:64 nr_cpu_ids:2 nr_node_ids:1 [ 0.000000] PERCPU: Embedded 42 pages/cpu @ffff8801db200000 s134024 r8192 d29816 u1048576 [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 1935227 [ 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 workqueue.watchdog_thresh=140 nopti [ 0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes) [ 0.000000] Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes) [ 0.000000] Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes) [ 0.000000] Memory: 6579092K/7863876K available (41762K kernel code, 6303K rwdata, 9052K rodata, 1864K init, 23696K bss, 1284784K reserved, 0K cma-reserved) [ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1 [ 0.000000] Running RCU self tests [ 0.000000] Preemptible hierarchical RCU implementation. [ 0.000000] RCU lockdep checking is enabled. [ 0.000000] Build-time adjustment of leaf fanout to 64. [ 0.000000] RCU restricting CPUs from NR_CPUS=64 to nr_cpu_ids=2. [ 0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=64, nr_cpu_ids=2 [ 0.000000] NR_IRQS:4352 nr_irqs:440 16 [ 0.000000] console [ttyS0] enabled [ 0.000000] console [ttyS0] enabled [ 0.000000] bootconsole [earlyser0] disabled [ 0.000000] bootconsole [earlyser0] disabled [ 0.000000] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar [ 0.000000] ... MAX_LOCKDEP_SUBCLASSES: 8 [ 0.000000] ... MAX_LOCK_DEPTH: 48 [ 0.000000] ... MAX_LOCKDEP_KEYS: 8191 [ 0.000000] ... CLASSHASH_SIZE: 4096 [ 0.000000] ... MAX_LOCKDEP_ENTRIES: 32768 [ 0.000000] ... MAX_LOCKDEP_CHAINS: 65536 [ 0.000000] ... CHAINHASH_SIZE: 32768 [ 0.000000] memory used by lock dependency info: 8159 kB [ 0.000000] per task-struct memory footprint: 1920 bytes [ 0.000000] tsc: Detected 2300.000 MHz processor [ 1.447114] Calibrating delay loop (skipped) preset value.. 4600.00 BogoMIPS (lpj=23000000) [ 1.448380] pid_max: default: 32768 minimum: 301 [ 1.449123] ACPI: Core revision 20150930 [ 1.885765] ACPI: 2 ACPI AML tables successfully acquired and loaded [ 1.887296] Security Framework initialized [ 1.887909] SELinux: Initializing. [ 1.888647] AppArmor: AppArmor disabled by boot time parameter [ 1.889653] Mount-cache hash table entries: 16384 (order: 5, 131072 bytes) [ 1.890977] Mountpoint-cache hash table entries: 16384 (order: 5, 131072 bytes) [ 1.894908] Initializing cgroup subsys io [ 1.895693] Initializing cgroup subsys freezer [ 1.896528] Initializing cgroup subsys hugetlb [ 1.897267] Initializing cgroup subsys debug [ 1.898141] CPU: Physical Processor ID: 0 [ 1.900220] mce: CPU supports 32 MCE banks [ 1.901130] Last level iTLB entries: 4KB 1024, 2MB 1024, 4MB 1024 [ 1.902251] Last level dTLB entries: 4KB 1024, 2MB 1024, 4MB 1024, 1GB 4 [ 1.903301] Spectre V2 : Mitigation: Full generic retpoline [ 1.906792] Freeing SMP alternatives memory: 48K [ 1.923325] ..TIMER: vector=0x30 apic1=0 pin1=0 apic2=-1 pin2=-1 [ 2.036280] smpboot: CPU0: Intel(R) Xeon(R) CPU @ 2.30GHz (family: 0x6, model: 0x3f, stepping: 0x0) [ 2.038021] Performance Events: unsupported p6 CPU model 63 no PMU driver, software events only. [ 2.126652] x86: Booting SMP configuration: [ 2.127571] .... node #0, CPUs: #1 [ 2.128724] kvm-clock: cpu 1, msr 2:1fffd041, secondary cpu clock [ 2.133934] x86: Booted up 1 node, 2 CPUs [ 2.134749] smpboot: Total of 2 processors activated (9200.00 BogoMIPS) [ 2.139333] devtmpfs: initialized [ 2.151072] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns [ 2.153858] futex hash table entries: 512 (order: 4, 65536 bytes) [ 2.156173] xor: automatically using best checksumming function: [ 2.165087] kworker/u4:0 (21) used greatest stack depth: 27920 bytes left [ 2.256302] avx : 23426.800 MB/sec [ 2.257685] RTC time: 20:15:01, date: 07/17/18 [ 2.261121] NET: Registered protocol family 16 [ 2.262345] schedtune: init normalization constants... [ 2.263140] schedtune: no energy model data [ 2.263865] schedtune: disabled! [ 2.268129] kworker/u4:0 (29) used greatest stack depth: 27616 bytes left [ 2.296685] cpuidle: using governor ladder [ 2.326385] cpuidle: using governor menu [ 2.327908] ACPI: bus type PCI registered [ 2.328766] acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5 [ 2.332087] PCI: Using configuration type 1 for base access [ 2.341024] kworker/u4:1 (48) used greatest stack depth: 27424 bytes left [ 2.796251] raid6: sse2x1 gen() 4472 MB/s [ 2.966237] raid6: sse2x1 xor() 2633 MB/s [ 3.136232] raid6: sse2x2 gen() 7441 MB/s [ 3.306218] raid6: sse2x2 xor() 4275 MB/s [ 3.476207] raid6: sse2x4 gen() 9803 MB/s [ 3.646190] raid6: sse2x4 xor() 5573 MB/s [ 3.816180] raid6: avx2x1 gen() 9354 MB/s [ 3.986161] raid6: avx2x2 gen() 14418 MB/s [ 4.156166] raid6: avx2x4 gen() 18761 MB/s [ 4.157005] raid6: using algorithm avx2x4 gen() 18761 MB/s [ 4.157776] raid6: using avx2x2 recovery algorithm [ 4.159275] ACPI: Added _OSI(Module Device) [ 4.160140] ACPI: Added _OSI(Processor Device) [ 4.160851] ACPI: Added _OSI(3.0 _SCP Extensions) [ 4.161583] ACPI: Added _OSI(Processor Aggregator Device) [ 4.190215] ACPI: Executed 2 blocks of module-level executable AML code [ 5.187811] ACPI: Interpreter enabled [ 5.188943] ACPI: (supports S0 S3 S4 S5) [ 5.189556] ACPI: Using IOAPIC for interrupt routing [ 5.190748] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug [ 6.474741] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff]) [ 6.475813] acpi PNP0A03:00: _OSC: OS supports [ASPM ClockPM Segments MSI] [ 6.477639] acpi PNP0A03:00: _OSC failed (AE_NOT_FOUND); disabling ASPM [ 6.478728] acpi PNP0A03:00: fail to add MMCONFIG information, can't access extended PCI configuration space under this bridge. [ 6.509055] PCI host bridge to bus 0000:00 [ 6.509841] pci_bus 0000:00: root bus resource [io 0x0000-0x0cf7 window] [ 6.510991] pci_bus 0000:00: root bus resource [io 0x0d00-0xffff window] [ 6.512306] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff window] [ 6.513628] pci_bus 0000:00: root bus resource [mem 0xc0000000-0xfebfffff window] [ 6.514842] pci_bus 0000:00: root bus resource [bus 00-ff] [ 6.557150] pci 0000:00:01.3: quirk: [io 0xb000-0xb03f] claimed by PIIX4 ACPI [ 6.652728] ACPI: PCI Interrupt Link [LNKA] (IRQs 5 *10 11) [ 6.660931] ACPI: PCI Interrupt Link [LNKB] (IRQs 5 *10 11) [ 6.667746] ACPI: PCI Interrupt Link [LNKC] (IRQs 5 10 *11) [ 6.674413] ACPI: PCI Interrupt Link [LNKD] (IRQs 5 10 *11) [ 6.678772] ACPI: PCI Interrupt Link [LNKS] (IRQs *9)