[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.467096] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available) [ 21.836628] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available) [ 22.862686] random: sshd: uninitialized urandom read (32 bytes read, 120 bits of entropy available) [ 23.036153] random: sshd: uninitialized urandom read (32 bytes read, 126 bits of entropy available) [ 23.154998] random: nonblocking pool is initialized Warning: Permanently added '10.128.0.27' (ECDSA) to the list of known hosts. executing program [ 28.548290] ================================================================== [ 28.555673] BUG: KASAN: slab-out-of-bounds in pfkey_add+0x153f/0x3490 [ 28.562216] Read of size 8160 at addr ffff8801ce77f940 by task syzkaller245529/3724 [ 28.569974] [ 28.571573] CPU: 0 PID: 3724 Comm: syzkaller245529 Not tainted 4.4.120-gd63fdf6 #28 [ 28.579331] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.588651] 0000000000000000 b5ebc8ae8be6070a ffff8800aebe7778 ffffffff81d0408d [ 28.596621] ffffea000739df80 ffff8801ce77f940 0000000000000000 ffff8801ce77fb00 [ 28.604587] ffff8800aebe79b8 ffff8800aebe77b0 ffffffff814fe143 ffff8801ce77f940 [ 28.612551] Call Trace: [ 28.615108] [] dump_stack+0xc1/0x124 [ 28.620438] [] print_address_description+0x73/0x260 [ 28.627069] [] kasan_report+0x285/0x370 [ 28.632660] [] ? pfkey_add+0x153f/0x3490 [ 28.638338] [] check_memory_region+0x137/0x190 [ 28.644535] [] memcpy+0x23/0x50 [ 28.649428] [] pfkey_add+0x153f/0x3490 [ 28.654934] [] ? pfkey_delete+0x370/0x370 [ 28.660694] [] ? pfkey_add+0x3490/0x3490 [ 28.666382] [] ? __skb_clone+0x24a/0x7d0 [ 28.672060] [] ? pfkey_delete+0x370/0x370 [ 28.677825] [] pfkey_process+0x68b/0x750 [ 28.683500] [] ? pfkey_send_new_mapping+0x11b0/0x11b0 [ 28.690305] [] pfkey_sendmsg+0x3a9/0x760 [ 28.695984] [] ? pfkey_spdget+0x820/0x820 [ 28.701747] [] sock_sendmsg+0xca/0x110 [ 28.707251] [] ___sys_sendmsg+0x6c1/0x7c0 [ 28.713014] [] ? copy_msghdr_from_user+0x550/0x550 [ 28.719562] [] ? check_preemption_disabled+0x3b/0x200 [ 28.726371] [] ? do_huge_pmd_anonymous_page+0x549/0xa10 [ 28.733350] [] ? _raw_spin_unlock+0x2c/0x50 [ 28.739286] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 28.746268] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 28.752984] [] ? __fget_light+0xa3/0x1e0 [ 28.758658] [] ? __fdget+0x18/0x20 [ 28.763815] [] __sys_sendmsg+0xd3/0x190 [ 28.769412] [] ? SyS_shutdown+0x1b0/0x1b0 [ 28.775178] [] ? __do_page_fault+0x380/0xa00 [ 28.781204] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 28.788010] [] SyS_sendmsg+0x2d/0x50 [ 28.793344] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 28.799890] [ 28.801485] Allocated by task 3724: [ 28.805075] [] save_stack_trace+0x26/0x50 [ 28.810957] [] save_stack+0x43/0xd0 [ 28.816316] [] kasan_kmalloc+0xad/0xe0 [ 28.821936] [] kasan_krealloc+0x64/0x80 [ 28.827639] [] ksize+0x92/0xf0 [ 28.832567] [] __alloc_skb+0x132/0x600 [ 28.838185] [] pfkey_sendmsg+0x135/0x760 [ 28.843980] [] sock_sendmsg+0xca/0x110 [ 28.849598] [] ___sys_sendmsg+0x6c1/0x7c0 [ 28.855476] [] __sys_sendmsg+0xd3/0x190 [ 28.861179] [] SyS_sendmsg+0x2d/0x50 [ 28.866622] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 28.873283] [ 28.874878] Freed by task 1985: [ 28.878120] [] save_stack_trace+0x26/0x50 [ 28.883999] [] save_stack+0x43/0xd0 [ 28.889357] [] kasan_slab_free+0x72/0xc0 [ 28.895147] [] kfree+0xfc/0x300 [ 28.900157] [] skb_release_data+0x2ed/0x3b0 [ 28.906211] [] skb_release_all+0x4a/0x60 [ 28.912000] [] consume_skb+0xf3/0x3d0 [ 28.917534] [] skb_free_datagram+0x1a/0xe0 [ 28.923497] [] unix_dgram_recvmsg+0x8b4/0xdb0 [ 28.929724] [] sock_recvmsg+0x8c/0xc0 [ 28.935255] [] SYSC_recvfrom+0x204/0x330 [ 28.941046] [] SyS_recvfrom+0x40/0x50 [ 28.946587] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 28.953247] [ 28.954844] The buggy address belongs to the object at ffff8801ce77f900 [ 28.954844] which belongs to the cache kmalloc-512 of size 512 [ 28.967675] The buggy address is located 64 bytes inside of [ 28.967675] 512-byte region [ffff8801ce77f900, ffff8801ce77fb00) [ 28.979431] The buggy address belongs to the page: SeaBIOS (version 1.8.2-20171120_144221-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 0x000f2360: PCHS=0/0/0 translation=lba LCHS=520/128/63 s=4194304 Booting from Hard Disk 0... early console in decompress_kernel input_data: 0x00000000037cb26e input_len: 0x0000000001423b2c output: 0x0000000001000000 output_len: 0x0000000003bdaa40 run_size: 0x0000000005310000 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 4.4.120-gd63fdf6 (syzkaller@ci) (gcc version 7.1.1 20170620 (GCC) ) #28 SMP PREEMPT Tue Mar 6 13:16:06 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=120 [ 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] x86/fpu: Using 'eager' FPU context switches. [ 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] 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 0x000f23e0-0x000f23ef] mapped at [ffff8800000f23e0] [ 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 0x00000000000F23A0 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 2183527405 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=120 [ 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: 6581404K/7863876K available (40422K kernel code, 6136K rwdata, 8808K rodata, 1848K init, 23616K bss, 1282472K reserved, 0K cma-reserved) [ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1 [ 0.000000] Kernel/User page tables isolation: enabled [ 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 [ 1.141170] Calibrating delay loop (skipped) preset value.. 4600.00 BogoMIPS (lpj=23000000) [ 1.142322] pid_max: default: 32768 minimum: 301 [ 1.143021] ACPI: Core revision 20150930 [ 1.560144] ACPI: 2 ACPI AML tables successfully acquired and loaded [ 1.562126] Security Framework initialized [ 1.562694] SELinux: Initializing. [ 1.563340] AppArmor: AppArmor disabled by boot time parameter [ 1.564237] Mount-cache hash table entries: 16384 (order: 5, 131072 bytes) [ 1.565163] Mountpoint-cache hash table entries: 16384 (order: 5, 131072 bytes) [ 1.568793] Initializing cgroup subsys io [ 1.569391] Initializing cgroup subsys freezer [ 1.570040] Initializing cgroup subsys hugetlb [ 1.570722] Initializing cgroup subsys debug [ 1.571506] CPU: Physical Processor ID: 0 [ 1.573338] mce: CPU supports 32 MCE banks [ 1.574080] Last level iTLB entries: 4KB 1024, 2MB 1024, 4MB 1024 [ 1.574907] Last level dTLB entries: 4KB 1024, 2MB 1024, 4MB 1024, 1GB 4 [ 1.575812] Spectre V2 : Vulnerable: Minimal generic ASM retpoline [ 1.578923] Freeing SMP alternatives memory: 44K [ 1.587907] ..TIMER: vector=0x30 apic1=0 pin1=0 apic2=-1 pin2=-1 [ 1.700496] smpboot: CPU0: Intel(R) Xeon(R) CPU @ 2.30GHz (family: 0x6, model: 0x3f, stepping: 0x0) [ 1.701905] Performance Events: unsupported p6 CPU model 63 no PMU driver, software events only. [ 1.790726] x86: Booting SMP configuration: [ 1.791385] .... node #0, CPUs: #1 [ 1.792151] kvm-clock: cpu 1, msr 2:1fffd041, secondary cpu clock [ 1.796884] x86: Booted up 1 node, 2 CPUs [ 1.797449] smpboot: Total of 2 processors activated (9200.00 BogoMIPS) [ 1.802050] devtmpfs: initialized [ 1.811407] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns [ 1.812747] futex hash table entries: 512 (order: 4, 65536 bytes) [ 1.814378] xor: automatically using best checksumming function: [ 1.817699] kworker/u4:0 (21) used greatest stack depth: 27944 bytes left [ 1.910501] avx : 21710.400 MB/sec [ 1.911681] RTC time: 8:57:06, date: 03/20/18 [ 1.913948] NET: Registered protocol family 16 [ 1.915013] schedtune: init normalization constants... [ 1.915712] schedtune: no energy model data [ 1.916290] schedtune: disabled! [ 1.950699] cpuidle: using governor ladder [ 1.980521] cpuidle: using governor menu [ 1.981752] ACPI: bus type PCI registered [ 1.982333] acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5 [ 1.985099] PCI: Using configuration type 1 for base access [ 1.996925] kworker/u4:0 (49) used greatest stack depth: 27448 bytes left [ 2.214129] kworker/u4:0 (483) used greatest stack depth: 27080 bytes left [ 2.420488] raid6: sse2x1 gen() 4655 MB/s [ 2.590450] raid6: sse2x1 xor() 2631 MB/s [ 2.760431] raid6: sse2x2 gen() 7583 MB/s [ 2.930417] raid6: sse2x2 xor() 4311 MB/s [ 3.100401] raid6: sse2x4 gen() 9816 MB/s [ 3.270381] raid6: sse2x4 xor() 5692 MB/s [ 3.440376] raid6: avx2x1 gen() 9444 MB/s [ 3.610354] raid6: avx2x2 gen() 14635 MB/s [ 3.780337] raid6: avx2x4 gen() 19125 MB/s [ 3.780978] raid6: using algorithm avx2x4 gen() 19125 MB/s [ 3.781721] raid6: using avx2x2 recovery algorithm [ 3.783022] ACPI: Added _OSI(Module Device) [ 3.783667] ACPI: Added _OSI(Processor Device) [ 3.784277] ACPI: Added _OSI(3.0 _SCP Extensions) [ 3.784921] ACPI: Added _OSI(Processor Aggregator Device) [ 3.810508] ACPI: Executed 2 blocks of module-level executable AML code [ 4.648151] ACPI: Interpreter enabled [ 4.649072] ACPI: (supports S0 S3 S4 S5) [ 4.649637] ACPI: Using IOAPIC for interrupt routing [ 4.650743] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug