[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 18.691654] random: sshd: uninitialized urandom read (32 bytes read, 31 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 24.030182] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 24.404887] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 25.519899] random: nonblocking pool is initialized Warning: Permanently added '10.128.10.4' (ECDSA) to the list of known hosts. executing program [ 31.727016] ================================================================== [ 31.734409] BUG: KASAN: use-after-free in l2tp_session_queue_purge+0xf4/0x100 [ 31.741742] Read of size 4 at addr ffff8800b5137180 by task syz-executor735/3710 [ 31.749244] [ 31.750847] CPU: 0 PID: 3710 Comm: syz-executor735 Not tainted 4.4.138-g226f96b #63 [ 31.758608] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.767934] 0000000000000000 083f4cdf89c5d97f ffff8800bbaffcc0 ffffffff81e0ed0d [ 31.775910] ffffea0002d44d80 ffff8800b5137180 0000000000000000 ffff8800b5137180 [ 31.783884] ffffffff82f1a2b0 ffff8800bbaffcf8 ffffffff81515a16 ffff8800b5137180 [ 31.791873] Call Trace: [ 31.794443] [] dump_stack+0xc1/0x124 [ 31.799777] [] ? sock_release+0x1c0/0x1c0 [ 31.805547] [] print_address_description+0x6c/0x216 [ 31.812191] [] ? sock_release+0x1c0/0x1c0 [ 31.817958] [] kasan_report.cold.7+0x175/0x2f7 [ 31.824161] [] ? l2tp_session_queue_purge+0xf4/0x100 [ 31.830884] [] __asan_report_load4_noabort+0x14/0x20 [ 31.837607] [] l2tp_session_queue_purge+0xf4/0x100 [ 31.844156] [] ? sock_release+0x1c0/0x1c0 [ 31.849924] [] pppol2tp_release+0x1ff/0x310 [ 31.855867] [] sock_release+0x96/0x1c0 [ 31.861373] [] sock_close+0x16/0x20 [ 31.866620] [] __fput+0x235/0x6f0 [ 31.871696] [] ____fput+0x15/0x20 [ 31.876780] [] task_work_run+0x10f/0x190 [ 31.882461] [] exit_to_usermode_loop+0x13d/0x160 [ 31.888836] [] syscall_return_slowpath+0x1b5/0x1f0 [ 31.895386] [] int_ret_from_sys_call+0x25/0xa3 [ 31.901594] [ 31.903195] Allocated by task 3709: [ 31.906799] [] save_stack_trace+0x26/0x50 [ 31.912689] [] save_stack+0x43/0xd0 [ 31.918143] [] kasan_kmalloc+0xc7/0xe0 [ 31.923784] [] __kmalloc+0x124/0x310 [ 31.929235] [] l2tp_session_create+0x39/0x1030 [ 31.935554] [] pppol2tp_connect+0x10f0/0x1910 [ 31.941790] [] SYSC_connect+0x1b8/0x300 [ 31.947503] [] SyS_connect+0x24/0x30 [ 31.952960] [] entry_SYSCALL_64_fastpath+0x22/0x9e [ 31.959630] [ 31.961227] Freed by task 3709: [ 31.964482] [] save_stack_trace+0x26/0x50 [ 31.970366] [] save_stack+0x43/0xd0 [ 31.975732] [] kasan_slab_free+0x72/0xc0 [ 31.981533] [] kfree+0xf4/0x310 [ 31.986549] [] l2tp_session_free+0x170/0x200 [ 31.992705] [] l2tp_tunnel_closeall+0x2b9/0x350 [ 31.999113] [] l2tp_udp_encap_destroy+0x8b/0xf0 [ 32.005519] [] udp_destroy_sock+0x118/0x1a0 [ 32.011589] [] sk_common_release+0x6d/0x300 [ 32.017651] [] udp_lib_close+0x15/0x20 [ 32.023277] [] inet_release+0xff/0x1d0 [ 32.028904] [] sock_release+0x96/0x1c0 [ 32.034528] [] sock_close+0x16/0x20 [ 32.039892] [] __fput+0x235/0x6f0 [ 32.045094] [] ____fput+0x15/0x20 [ 32.050286] [] task_work_run+0x10f/0x190 [ 32.056106] [] exit_to_usermode_loop+0x13d/0x160 [ 32.062601] [] syscall_return_slowpath+0x1b5/0x1f0 [ 32.069269] [] int_ret_from_sys_call+0x25/0xa3 [ 32.075593] [ 32.077193] The buggy address belongs to the object at ffff8800b5137180 [ 32.077193] which belongs to the cache kmalloc-512 of size 512 [ 32.089826] The buggy address is located 0 bytes inside of [ 32.089826] 512-byte region [ffff8800b5137180, ffff8800b5137380) [ 32.101494] The buggy address belongs to the page: [ 32.132104] kasan: CONFIG_KASAN_INLINE enabled [ 32.136545] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 32.149465] Dumping ftrace buffer: [ 32.152988] (ftrace buffer empty) [ 32.156690] Modules linked in: [ 32.160010] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.4.138-g226f96b #63 [ 32.167010] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.176361] task: ffff8801d9a41800 task.stack: ffff8801d9a50000 [ 32.182403] RIP: 0010:[] [] debug_object_deactivate+0x191/0x340 [ 32.191812] RSP: 0018:ffff8801db307cf0 EFLAGS: 00010002 [ 32.197255] RAX: dffffc0000000000 RBX: 00000000006dac38 RCX: 00000000000db58a [ 32.204521] RDX: 0000000000000000 RSI: ffffffff844c6720 RDI: 00000000006dac50 [ 32.211782] RBP: ffff8801db307da8 R08: ffffffff8533df90 R09: 0000000000000001 [ 32.219043] R10: 0000000000000001 R11: ffff8801d9a41800 R12: 1ffff1003b660fa0 [ 32.226306] R13: ffffffff85a044a8 R14: ffff8801db319c40 R15: 000000000007216e [ 32.233569] FS: 0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 32.241784] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.247659] CR2: 00007f23c9dbbe78 CR3: 00000001cdbbd000 CR4: 00000000001606f0 [ 32.254923] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 32.262189] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 32.269448] Stack: [ 32.271591] 0000000000000092 ffffffff844c6720 0000000041b58ab3 ffffffff842092d7 [ 32.279673] ffffffff81e70670 ffff8801d9a41800 ffffed003b34841b ffff8801d9a420e0 [ 32.287736] ffff8801db319658 0000000000000000 ffff8801db307d80 ffffffff81229682 [ 32.295826] Call Trace: [ 32.298398] [ 32.300460] [] ? debug_object_activate+0x480/0x480 [ 32.307346] [] ? __lock_is_held+0xa2/0xf0 [ 32.313148] [] __hrtimer_run_queues+0x222/0x1000 [ 32.319553] [] ? retrigger_next_event+0x1c0/0x1c0 [ 32.326044] [] ? kvm_clock_read+0x23/0x40 [ 32.331842] [] ? kvm_clock_get_cycles+0x9/0x10 [ 32.338069] [] ? hrtimer_interrupt+0x12d/0x430 [ 32.344294] [] hrtimer_interrupt+0x1b1/0x430 [ 32.350483] [] local_apic_timer_interrupt+0x74/0xa0 [ 32.357146] [] smp_apic_timer_interrupt+0x7c/0xa0 [ 32.363635] [] apic_timer_interrupt+0xa0/0xb0 [ 32.369770] [ 32.371839] [] ? native_safe_halt+0x6/0x10 [ 32.378035] [] default_idle+0x55/0x3c0 [ 32.383571] [] arch_cpu_idle+0x10/0x20 [ 32.389108] [] default_idle_call+0x57/0x70 [ 32.394992] [] cpu_startup_entry+0x6af/0x780 [ 32.401045] [] ? call_cpuidle+0xe0/0xe0 [ 32.406671] [] start_secondary+0x324/0x400 [ 32.412553] [] ? set_cpu_sibling_map+0x1180/0x1180 [ 32.419133] Code: a9 01 00 00 48 8b 1b 41 bf 01 00 00 00 48 85 db 74 42 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 18 41 83 c7 01 48 89 f9 48 c1 e9 03 <80> 3c 01 00 0f 85 0c 01 00 00 4c 3b 73 18 74 7d 48 89 d9 48 c1 [ 32.446865] RIP [] debug_object_deactivate+0x191/0x340 [ 32.453929] RSP [ 32.457552] ---[ end trace 7c298566e2480cc2 ]--- [ 32.462298] Kernel panic - not syncing: Fatal exception in interrupt SeaBIOS (version 1.8.2-20171130_102032-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: 0x00000000014cc084 output: 0x0000000001000000 output_len: 0x0000000004008a40 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 4.4.138-g226f96b (syzkaller@ci) (gcc version 8.0.1 20180413 (experimental) (GCC) ) #63 SMP PREEMPT Mon Jun 18 23:20:44 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 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 2038687985 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 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 (41761K kernel code, 6302K rwdata, 9048K 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 [ 1.201559] Calibrating delay loop (skipped) preset value.. 4600.00 BogoMIPS (lpj=23000000) [ 1.202711] pid_max: default: 32768 minimum: 301 [ 1.203441] ACPI: Core revision 20150930 [ 1.593513] ACPI: 2 ACPI AML tables successfully acquired and loaded [ 1.594821] Security Framework initialized [ 1.595411] SELinux: Initializing. [ 1.596062] AppArmor: AppArmor disabled by boot time parameter [ 1.597019] Mount-cache hash table entries: 16384 (order: 5, 131072 bytes) [ 1.597962] Mountpoint-cache hash table entries: 16384 (order: 5, 131072 bytes) [ 1.601539] Initializing cgroup subsys io [ 1.602154] Initializing cgroup subsys freezer [ 1.602803] Initializing cgroup subsys hugetlb [ 1.603469] Initializing cgroup subsys debug [ 1.604223] CPU: Physical Processor ID: 0 [ 1.606098] mce: CPU supports 32 MCE banks [ 1.606847] Last level iTLB entries: 4KB 1024, 2MB 1024, 4MB 1024 [ 1.607675] Last level dTLB entries: 4KB 1024, 2MB 1024, 4MB 1024, 1GB 4 [ 1.608578] Spectre V2 : Mitigation: Full generic retpoline [ 1.611662] Freeing SMP alternatives memory: 48K [ 1.621202] ..TIMER: vector=0x30 apic1=0 pin1=0 apic2=-1 pin2=-1 [ 1.740877] smpboot: CPU0: Intel(R) Xeon(R) CPU @ 2.30GHz (family: 0x6, model: 0x3f, stepping: 0x0) [ 1.742493] Performance Events: unsupported p6 CPU model 63 no PMU driver, software events only. [ 1.831124] x86: Booting SMP configuration: [ 1.831824] .... node #0, CPUs: #1 [ 1.832655] kvm-clock: cpu 1, msr 2:1fffd041, secondary cpu clock [ 1.837485] x86: Booted up 1 node, 2 CPUs [ 1.838055] smpboot: Total of 2 processors activated (9200.00 BogoMIPS) [ 1.842051] devtmpfs: initialized [ 1.851916] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns [ 1.853331] futex hash table entries: 512 (order: 4, 65536 bytes) [ 1.854971] xor: automatically using best checksumming function: [ 1.858365] kworker/u4:0 (21) used greatest stack depth: 27920 bytes left [ 1.950882] avx : 23466.000 MB/sec [ 1.952087] RTC time: 17:33:51, date: 06/25/18 [ 1.955313] NET: Registered protocol family 16 [ 1.956427] schedtune: init normalization constants... [ 1.957129] schedtune: no energy model data [ 1.957706] schedtune: disabled! [ 1.961620] kworker/u4:0 (29) used greatest stack depth: 27616 bytes left [ 1.991201] cpuidle: using governor ladder [ 2.020925] cpuidle: using governor menu [ 2.022212] ACPI: bus type PCI registered [ 2.022771] acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5 [ 2.025747] PCI: Using configuration type 1 for base access [ 2.034114] kworker/u4:1 (47) used greatest stack depth: 27424 bytes left [ 2.460817] raid6: sse2x1 gen() 4664 MB/s [ 2.630802] raid6: sse2x1 xor() 2555 MB/s [ 2.800789] raid6: sse2x2 gen() 7014 MB/s [ 2.970768] raid6: sse2x2 xor() 4053 MB/s [ 3.140755] raid6: sse2x4 gen() 8678 MB/s [ 3.310729] raid6: sse2x4 xor() 5311 MB/s [ 3.480713] raid6: avx2x1 gen() 9432 MB/s [ 3.650702] raid6: avx2x2 gen() 14611 MB/s [ 3.820679] raid6: avx2x4 gen() 19194 MB/s [ 3.821349] raid6: using algorithm avx2x4 gen() 19194 MB/s [ 3.822093] raid6: using avx2x2 recovery algorithm [ 3.823419] ACPI: Added _OSI(Module Device) [ 3.824101] ACPI: Added _OSI(Processor Device) [ 3.824726] ACPI: Added _OSI(3.0 _SCP Extensions) [ 3.825404] ACPI: Added _OSI(Processor Aggregator Device) [ 3.851889] ACPI: Executed 2 blocks of module-level executable AML code [ 4.740111] ACPI: Interpreter enabled [ 4.741074] ACPI: (supports S0 S3 S4 S5) [ 4.741642] ACPI: Using IOAPIC for interrupt routing [ 4.742777] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug