================================================================== BUG: KASAN: slab-out-of-bounds in pfkey_msg2xfrm_state net/key/af_key.c:1227 [inline] BUG: KASAN: slab-out-of-bounds in pfkey_add+0x145d/0x3220 net/key/af_key.c:1506 Read of size 8192 at addr ffff8800b1f462c0 by task syz-executor5/27892 CPU: 0 PID: 27892 Comm: syz-executor5 Not tainted 4.4.135-g6cdd987d #56 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 0000000000000000 2b59d1d905ee664a ffff8801d686f740 ffffffff81e0ed0d ffffea0002c7d180 ffff8800b1f462c0 0000000000000000 ffff8800b1f46480 ffff8800b1f46280 ffff8801d686f778 ffffffff81515946 ffff8800b1f462c0 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x124 lib/dump_stack.c:51 [] print_address_description+0x6c/0x216 mm/kasan/report.c:252 [] kasan_report_error mm/kasan/report.c:351 [inline] [] kasan_report.cold.7+0x175/0x2f7 mm/kasan/report.c:408 [] check_memory_region_inline mm/kasan/kasan.c:325 [inline] [] check_memory_region+0x14f/0x1b0 mm/kasan/kasan.c:332 [] memcpy+0x23/0x50 mm/kasan/kasan.c:367 [] pfkey_msg2xfrm_state net/key/af_key.c:1227 [inline] [] pfkey_add+0x145d/0x3220 net/key/af_key.c:1506 [] pfkey_process+0x671/0x740 net/key/af_key.c:2834 [] pfkey_sendmsg+0x346/0xae0 net/key/af_key.c:3678 [] sock_sendmsg_nosec net/socket.c:625 [inline] [] sock_sendmsg+0xcc/0x110 net/socket.c:635 [] ___sys_sendmsg+0x745/0x880 net/socket.c:1962 [] __sys_sendmsg+0xd6/0x190 net/socket.c:1996 [] SYSC_sendmsg net/socket.c:2007 [inline] [] SyS_sendmsg+0x2d/0x50 net/socket.c:2003 [] entry_SYSCALL_64_fastpath+0x22/0x9e Allocated by task 27892: [] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63 [] save_stack+0x43/0xd0 mm/kasan/kasan.c:512 [] set_track mm/kasan/kasan.c:524 [inline] [] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:616 [] kasan_krealloc+0x64/0x80 mm/kasan/kasan.c:654 [] ksize+0x8a/0xf0 mm/slub.c:3727 [] __alloc_skb+0x133/0x600 net/core/skbuff.c:237 [] alloc_skb include/linux/skbuff.h:815 [inline] [] pfkey_sendmsg+0xfe/0xae0 net/key/af_key.c:3665 [] sock_sendmsg_nosec net/socket.c:625 [inline] [] sock_sendmsg+0xcc/0x110 net/socket.c:635 [] ___sys_sendmsg+0x745/0x880 net/socket.c:1962 [] __sys_sendmsg+0xd6/0x190 net/socket.c:1996 [] SYSC_sendmsg net/socket.c:2007 [inline] [] SyS_sendmsg+0x2d/0x50 net/socket.c:2003 [] entry_SYSCALL_64_fastpath+0x22/0x9e Freed by task 17096: [] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63 [] save_stack+0x43/0xd0 mm/kasan/kasan.c:512 [] set_track mm/kasan/kasan.c:524 [inline] [] kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:589 [] slab_free_hook mm/slub.c:1383 [inline] [] slab_free_freelist_hook mm/slub.c:1405 [inline] [] slab_free mm/slub.c:2859 [inline] [] kfree+0xf4/0x310 mm/slub.c:3749 [] skb_free_head net/core/skbuff.c:571 [inline] [] skb_release_data+0x304/0x3b0 net/core/skbuff.c:602 [] skb_release_all+0x4a/0x60 net/core/skbuff.c:661 [] __kfree_skb net/core/skbuff.c:675 [inline] [] consume_skb+0xf3/0x3d0 net/core/skbuff.c:748 [] netlink_broadcast_filtered+0x2b2/0x9c0 net/netlink/af_netlink.c:1479 [] kobject_uevent_env+0x6d8/0xb80 lib/kobject_uevent.c:316 [] kobject_uevent+0x1f/0x30 lib/kobject_uevent.c:374 [] kobject_cleanup lib/kobject.c:630 [inline] [] kobject_release+0x144/0x1b0 lib/kobject.c:672 [] kref_sub include/linux/kref.h:73 [inline] [] kref_put include/linux/kref.h:98 [inline] [] kobject_put+0x72/0xd0 lib/kobject.c:689 [] net_rx_queue_update_kobjects+0x29e/0x3d0 net/core/net-sysfs.c:937 [] remove_queue_kobjects net/core/net-sysfs.c:1376 [inline] [] netdev_unregister_kobject+0x9d/0x110 net/core/net-sysfs.c:1511 [] rollback_registered_many+0x3f8/0x760 net/core/dev.c:6367 [] unregister_netdevice_many.part.98+0x1b/0x110 net/core/dev.c:7354 [] unregister_netdevice_many net/core/dev.c:7353 [inline] [] default_device_exit_batch+0x350/0x410 net/core/dev.c:7812 [] ops_exit_list.isra.6+0x105/0x160 net/core/net_namespace.c:137 [] cleanup_net+0x321/0x600 net/core/net_namespace.c:452 [] process_one_work+0x7df/0x1600 kernel/workqueue.c:2064 [] worker_thread+0xd9/0xfc0 kernel/workqueue.c:2196 [] kthread+0x268/0x300 kernel/kthread.c:211 [] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:510 The buggy address belongs to the object at ffff8800b1f46280 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 64 bytes inside of 512-byte region [ffff8800b1f46280, ffff8800b1f46480) The buggy address belongs to the page: kernel tried to execute NX-protected page - exploit attempt? (uid: 0) BUG: unable to handle kernel paging request at ffff8801d4b41c20 IP: [] 0xffff8801d4b41c20 PGD 632d067 PUD 80000001c00001e3 Oops: 0011 [#1] PREEMPT SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.4.135-g6cdd987d #56 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801d9a41800 SeaBIOS (version 1.8.2-20180102_145157-google) Initializing cgroup subsys cpuset Initializing cgroup subsys cpu Initializing cgroup subsys cpuacct Initializing cgroup subsys schedtune Linux version 4.4.135-g6cdd987d (syzkaller@ci) (gcc version 8.0.1 20180413 (experimental) (GCC) ) #56 SMP PREEMPT Tue Jun 5 10:05:51 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 nopti KERNEL supported cpus: Intel GenuineIntel AMD AuthenticAMD Centaur CentaurHauls x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256 x86/fpu: Supporting XSAVE feature 0x01: 'x87 floating point registers' x86/fpu: Supporting XSAVE feature 0x02: 'SSE registers' x86/fpu: Supporting XSAVE feature 0x04: 'AVX registers' x86/fpu: Enabled xstate features 0x7, context size is 832 bytes, using 'standard' format. x86/fpu: Using 'eager' FPU context switches. e820: 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 NX (Execute Disable) protection: active SMBIOS 2.4 present. Hypervisor detected: KVM Kernel/User page tables isolation: disabled e820: last_pfn = 0x220000 max_arch_pfn = 0x400000000 x86/PAT: Configuration [0-7]: WB WC UC- UC WB WC UC- WT e820: last_pfn = 0xbfff3 max_arch_pfn = 0x400000000 found SMP MP-table at [mem 0x000f22b0-0x000f22bf] mapped at [ffff8800000f22b0] Scanning 1 areas for low memory corruption Using GB pages for direct mapping ACPI: Early table checksum verification disabled ACPI: RSDP 0x00000000000F2270 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) kvm-clock: Using msrs 4b564d01 and 4b564d00 kvm-clock: cpu 0, msr 2:1fffd001, primary cpu clock kvm-clock: using sched offset of 2364537963 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] 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] e820: [mem 0xc0000000-0xfffbbfff] available for PCI devices Booting paravirtualized kernel on KVM clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns setup_percpu: NR_CPUS:64 nr_cpumask_bits:64 nr_cpu_ids:2 nr_node_ids:1 PERCPU: Embedded 42 pages/cpu @ffff8801db200000 s134024 r8192 d29816 u1048576 Built 1 zonelists in Zone order, mobility grouping on. Total pages: 1935227 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 PID hash table entries: 4096 (order: 3, 32768 bytes) Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes) Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes) Memory: 6579092K/7863876K available (41761K kernel code, 6302K rwdata, 9052K rodata, 1864K init, 23696K bss, 1284784K reserved, 0K cma-reserved) SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1 Running RCU self tests Preemptible hierarchical RCU implementation. RCU lockdep checking is enabled. Build-time adjustment of leaf fanout to 64. RCU restricting CPUs from NR_CPUS=64 to nr_cpu_ids=2. RCU: Adjusting geometry for rcu_fanout_leaf=64, nr_cpu_ids=2 NR_IRQS:4352 nr_irqs:440 16 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: 8159 kB per task-struct memory footprint: 1920 bytes tsc: Detected 2300.000 MHz processor Calibrating delay loop (skipped) preset value.. 4600.00 BogoMIPS (lpj=23000000) pid_max: default: 32768 minimum: 301 ACPI: Core revision 20150930 ACPI: 2 ACPI AML tables successfully acquired and loaded Security Framework initialized SELinux: Initializing. AppArmor: AppArmor disabled by boot time parameter Mount-cache hash table entries: 16384 (order: 5, 131072 bytes) Mountpoint-cache hash table entries: 16384 (order: 5, 131072 bytes) Initializing cgroup subsys io Initializing cgroup subsys freezer Initializing cgroup subsys hugetlb Initializing cgroup subsys debug 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 Freeing SMP alternatives memory: 48K ..TIMER: vector=0x30 apic1=0 pin1=0 apic2=-1 pin2=-1 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. x86: Booting SMP configuration: .... node #0, CPUs: #1 kvm-clock: cpu 1, msr 2:1fffd041, secondary cpu clock x86: Booted up 1 node, 2 CPUs smpboot: Total of 2 processors activated (9200.00 BogoMIPS) devtmpfs: initialized clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns futex hash table entries: 512 (order: 4, 65536 bytes) xor: automatically using best checksumming function: kworker/u4:0 (21) used greatest stack depth: 27424 bytes left avx : 21538.000 MB/sec RTC time: 15:23:19, date: 06/05/18 NET: Registered protocol family 16 schedtune: init normalization constants... schedtune: no energy model data schedtune: disabled! cpuidle: using governor ladder cpuidle: using governor menu ACPI: bus type PCI registered acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5 PCI: Using configuration type 1 for base access kworker/u4:2 (417) used greatest stack depth: 27024 bytes left raid6: sse2x1 gen() 4647 MB/s raid6: sse2x1 xor() 2433 MB/s raid6: sse2x2 gen() 7426 MB/s raid6: sse2x2 xor() 3926 MB/s raid6: sse2x4 gen() 9346 MB/s raid6: sse2x4 xor() 5363 MB/s raid6: avx2x1 gen() 8867 MB/s raid6: avx2x2 gen() 12826 MB/s raid6: avx2x4 gen() 18539 MB/s raid6: using algorithm avx2x4 gen() 18539 MB/s 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: Executed 2 blocks of module-level executable AML code 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: 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)