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Hi, |
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|
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first which rsbac version you are using. |
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Appears this bug also when you try the rsbac-sources without pax? |
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|
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Jens |
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|
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Am 2013-07-15 03:07, schrieb Javier Juan Martínez Cabezón: |
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> I send related PaX .config if you need it: |
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> |
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> # |
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> # PaX |
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> # |
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> CONFIG_ARCH_TRACK_EXEC_LIMIT=y |
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> CONFIG_PAX_PER_CPU_PGD=y |
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> CONFIG_PAX=y |
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> |
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> # |
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> # PaX Control |
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> # |
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> CONFIG_PAX_SOFTMODE=y |
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> # CONFIG_PAX_EI_PAX is not set |
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> CONFIG_PAX_PT_PAX_FLAGS=y |
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> # CONFIG_PAX_XATTR_PAX_FLAGS is not set |
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> # CONFIG_PAX_NO_ACL_FLAGS is not set |
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> CONFIG_PAX_HAVE_ACL_FLAGS=y |
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> # CONFIG_PAX_HOOK_ACL_FLAGS is not set |
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> |
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> # |
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> # Non-executable pages |
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> # |
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> CONFIG_PAX_NOEXEC=y |
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> CONFIG_PAX_PAGEEXEC=y |
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> # CONFIG_PAX_SEGMEXEC is not set |
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> CONFIG_PAX_EMUTRAMP=y |
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> CONFIG_PAX_MPROTECT=y |
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> # CONFIG_PAX_ELFRELOCS is not set |
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> CONFIG_PAX_KERNEXEC=y |
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> CONFIG_PAX_KERNEXEC_PLUGIN_METHOD="" |
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> |
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> # |
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> # Address Space Layout Randomization |
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> # |
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> CONFIG_PAX_ASLR=y |
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> CONFIG_PAX_RANDKSTACK=y |
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> CONFIG_PAX_RANDUSTACK=y |
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> CONFIG_PAX_RANDMMAP=y |
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> |
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> # |
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> # Miscellaneous hardening features |
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> # |
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> # CONFIG_PAX_MEMORY_SANITIZE is not set |
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> # CONFIG_PAX_MEMORY_STACKLEAK is not set |
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> # CONFIG_PAX_MEMORY_UDEREF is not set |
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> CONFIG_PAX_REFCOUNT=y |
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> # CONFIG_PAX_USERCOPY is not set |
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> # CONFIG_PAX_CONSTIFY_PLUGIN is not set |
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> # CONFIG_PAX_SIZE_OVERFLOW is not set |
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> # CONFIG_KEYS is not set |
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> CONFIG_SECURITY_DMESG_RESTRICT=y |
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> # CONFIG_SECURITY is not set |
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> # CONFIG_SECURITYFS is not set |
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> CONFIG_DEFAULT_SECURITY_DAC=y |
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> CONFIG_DEFAULT_SECURITY="" |
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> CONFIG_XOR_BLOCKS=y |
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> CONFIG_ASYNC_CORE=y |
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> CONFIG_ASYNC_MEMCPY=y |
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> CONFIG_ASYNC_XOR=y |
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> CONFIG_ASYNC_PQ=y |
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> CONFIG_ASYNC_RAID6_RECOV=y |
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> CONFIG_CRYPTO=y |
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> |
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> # |
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> |
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> 2013/7/15 Javier Juan Martínez Cabezón <tazok.id0@×××××.com> |
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> |
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>> Hi all |
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>> |
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>> I'm with this several months and I still without knowing if it was |
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>> mistake from me while patching PaX with rsbac at hand or is a |
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>> kernel bug, or it's from VirtualBox (the behaviour is horrible, |
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>> sorry): |
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>> |
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>> After the bug hits system guest gets unusable, hard reset is |
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>> required, every command executed gets segfaulted from there. |
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>> |
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>> I can reproduce it easily, using backup_all (a shell script that |
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>> makes the sec policy backup (as in this case)) or with ./configure |
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>> when compiling (as emerge does something), so emerge usually does |
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>> seg fault. The EIP is always at the same, strnlen+0x6/0x18 |
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>> |
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>> Jul 13 22:50:02 orion kernel: BUG: unable to handle kernel paging |
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>> request at 00001033 |
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>> Jul 13 22:50:02 orion kernel: IP: [<001aa8e2>] strnlen+0x6/0x18 |
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>> Jul 13 22:50:02 orion kernel: *pdpt = 000000000e965001 *pde = |
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>> 0000000000000000 |
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>> Jul 13 22:50:02 orion kernel: Oops: 0000 [#1] |
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>> Jul 13 22:50:02 orion kernel: |
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>> Jul 13 22:50:02 orion kernel: Pid: 4147, comm: bash Not tainted |
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>> 3.4.0-rsbac #9 innotek GmbH VirtualBox |
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>> Jul 13 22:50:02 orion kernel: EIP: 0060:[<001aa8e2>] EFLAGS: |
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>> 00010217 CPU: 0 |
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>> Jul 13 22:50:02 orion kernel: EIP is at strnlen+0x6/0x18 |
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>> Jul 13 22:50:02 orion kernel: EAX: 00001033 EBX: ce9c0069 ECX: |
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>> 00001033 EDX: 0000000e |
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>> Jul 13 22:50:02 orion kernel: ESI: 00001033 EDI: ce9c0069 EBP: |
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>> ce9c07f5 ESP: c66d3b38 |
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>> Jul 13 22:50:02 orion kernel: DS: 0068 ES: 0068 FS: 0000 GS: 0000 |
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>> SS: 0068 |
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>> Jul 13 22:50:02 orion kernel: CR0: 8005003b CR2: 00001033 CR3: |
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>> 01415000 CR4: 000006f0 |
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>> Jul 13 22:50:02 orion kernel: DR0: 00000000 DR1: 00000000 DR2: |
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>> 00000000 DR3: 00000000 |
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>> Jul 13 22:50:02 orion kernel: DR6: ffff0ff0 DR7: 00000400 |
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>> Jul 13 22:50:02 orion kernel: Process bash (pid: 4147, ti=e738ee3c |
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>> task=e738ebd0 task.ti=e738ee3c) |
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>> Jul 13 22:50:02 orion kernel: Stack: |
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>> Jul 13 22:50:02 orion kernel: 001a884b c66d3bb4 c66d3bb0 c66d3bb4 |
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>> ce9c0069 ce9c0069 001a916e 000fff00 |
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>> Jul 13 22:50:02 orion kernel: 000fffff 0000000f ce9c07f5 ce9c000b |
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>> c1514bcb 000007ea ff0a0004 000fffff |
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>> Jul 13 22:50:02 orion kernel: ce9c0000 c66d3bdc c66d3bac c66d3bdc |
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>> 0004dfc6 c66d3ba8 e702a4c0 c66d3bdc |
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>> Jul 13 22:50:02 orion kernel: Call Trace: |
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>> Jul 13 22:50:02 orion kernel: [<001a884b>] ? |
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>> string.isra.1+0x25/0x8c |
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>> Jul 13 22:50:02 orion kernel: [<001a916e>] ? vsnprintf+0x139/0x257 |
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>> Jul 13 22:50:02 orion kernel: [<000fff00>] ? bio_map_user+0x13/0x25 |
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>> Jul 13 22:50:02 orion kernel: [<000fffff>] ? bio_map_kern+0xb0/0xd9 |
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>> Jul 13 22:50:02 orion kernel: [<000fffff>] ? bio_map_kern+0xb0/0xd9 |
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>> Jul 13 22:50:02 orion kernel: [<0004dfc6>] ? rsbac_printk+0x52/0x18e |
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>> Jul 13 22:50:02 orion kernel: [<0007d3ee>] ? |
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>> rsbac_adf_set_attr_cap+0x680/0x9a6 |
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>> Jul 13 22:50:02 orion kernel: [<00038a00>] ? |
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>> smp_apic_timer_interrupt+0x62/0x6a |
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>> Jul 13 22:50:02 orion kernel: [<00407f91>] ? |
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>> resume_userspace_sig+0x1b/0x2a |
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>> Jul 13 22:50:02 orion kernel: [<0007148e>] ? |
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>> rsbac_adf_set_attr+0x45f/0x12b3 |
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>> Jul 13 22:50:02 orion kernel: [<00800001>] ? 0x800000 |
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>> Jul 13 22:50:02 orion kernel: [<0009fa4f>] ? do_adjtimex+0x2ab/0x550 |
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>> Jul 13 22:50:02 orion kernel: [<000e85ec>] ? |
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>> do_path_lookup+0x17/0x4a |
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>> Jul 13 22:50:02 orion kernel: [<000e8963>] ? |
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>> user_path_at_empty+0x4b/0x69 |
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>> Jul 13 22:50:02 orion kernel: [<000e8963>] ? |
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>> user_path_at_empty+0x4b/0x69 |
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>> Jul 13 22:50:02 orion kernel: [<000c6a52>] ? __do_fault+0x357/0x389 |
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>> Jul 13 22:50:02 orion kernel: [<0002cc9e>] ? |
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>> free_thread_xstate+0x17/0x23 |
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>> Jul 13 22:50:02 orion kernel: [<00110c60>] ? |
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>> load_elf_binary+0xf05/0xfbf |
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>> Jul 13 22:50:02 orion kernel: [<00110c60>] ? |
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>> load_elf_binary+0xf05/0xfbf |
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>> Jul 13 22:50:02 orion kernel: [<00030502>] ? |
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>> x86_pmu_event_init+0x23c/0x2d1 |
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>> Jul 13 22:50:02 orion kernel: [<000e2f53>] ? |
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>> do_execve_common+0x363/0x45e |
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>> Jul 13 22:50:02 orion kernel: [<00800001>] ? 0x800000 |
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>> Jul 13 22:50:02 orion kernel: [<0009fa4f>] ? do_adjtimex+0x2ab/0x550 |
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>> Jul 13 22:50:02 orion kernel: [<000e85ec>] ? |
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>> do_path_lookup+0x17/0x4a |
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>> Jul 13 22:50:02 orion kernel: [<000e8963>] ? |
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>> user_path_at_empty+0x4b/0x69 |
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>> Jul 13 22:50:02 orion kernel: [<000e8963>] ? |
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>> user_path_at_empty+0x4b/0x69 |
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>> Jul 13 22:50:02 orion kernel: [<000c6a52>] ? __do_fault+0x357/0x389 |
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>> Jul 13 22:50:02 orion kernel: [<00800001>] ? 0x800000 |
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>> Jul 13 22:50:02 orion kernel: [<0009fa4f>] ? |
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>> do_adjtimex+0x2ab/0x550 |
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>> Jul 13 22:50:02 orion kernel: [<00800001>] ? 0x800000 |
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>> Jul 13 22:50:02 orion kernel: [<0009fa4f>] ? do_adjtimex+0x2ab/0x550 |
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>> Jul 13 22:50:02 orion kernel: [<000e85ec>] ? |
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>> do_path_lookup+0x17/0x4a |
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>> Jul 13 22:50:02 orion kernel: [<000e8963>] ? |
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>> user_path_at_empty+0x4b/0x69 |
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>> Jul 13 22:50:02 orion kernel: [<000e8963>] ? |
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>> user_path_at_empty+0x4b/0x69 |
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>> Jul 13 22:50:02 orion kernel: [<00800001>] ? 0x800000 |
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>> Jul 13 22:50:02 orion kernel: [<0009fa4f>] ? |
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>> do_adjtimex+0x2ab/0x550 |
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>> Jul 13 22:50:02 orion kernel: [<000c6a52>] ? __do_fault+0x357/0x389 |
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>> Jul 13 22:50:02 orion kernel: [<000e626c>] ? getname_flags+0x1b/0xbf |
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>> Jul 13 22:50:02 orion kernel: [<000e3057>] ? do_execve+0x9/0xb |
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>> Jul 13 22:50:02 orion kernel: [<0002d0f1>] ? sys_execve+0x2c/0x50 |
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>> Jul 13 22:50:02 orion kernel: [<004087f2>] ? ptregs_execve+0x12/0x20 |
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>> Jul 13 22:50:02 orion kernel: [<00408009>] ? syscall_call+0x7/0xb |
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>> Jul 13 22:50:02 orion kernel: [<00408024>] ? restore_all_pax+0x7/0x7 |
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>> Jul 13 22:50:02 orion kernel: [<000290d5>] ? |
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>> math_state_restore+0x96/0x96 |
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>> Jul 13 22:50:02 orion kernel: [<00010206>] ? |
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>> kvm_arch_vcpu_ioctl_run+0x79a/0xbdc |
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>> Jul 13 22:50:02 orion kernel: [<0003c0a9>] ? |
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>> vmalloc_sync_all+0x1/0x1 |
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>> Jul 13 22:50:02 orion kernel: [<00408024>] ? restore_all_pax+0x7/0x7 |
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>> Jul 13 22:50:02 orion kernel: [<0040007b>] ? |
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>> pcnet32_remove_one+0x22/0xe3 |
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>> Jul 13 22:50:02 orion kernel: [<0001007b>] ? |
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>> kvm_arch_vcpu_ioctl_run+0x60f/0xbdc |
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>> Jul 13 22:50:02 orion kernel: [<0003c0a9>] ? |
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>> vmalloc_sync_all+0x1/0x1 |
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>> Jul 13 22:50:02 orion kernel: [<00010287>] ? |
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>> kvm_arch_vcpu_ioctl_run+0x81b/0xbdc |
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>> Jul 13 22:50:02 orion kernel: Code: d0 f2 ae 74 05 bf 01 00 00 00 4f |
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>> eb 02 31 ff 89 f8 5f c3 85 c9 57 89 c7 74 07 89 d0 f2 ae 75 01 4f 89 |
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>> f8 5f c3 89 c1 89 c8 eb 06 <80> 38 00 74 07 40 4a 83 fa ff 75 f4 29 |
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>> c8 c3 90 90 90 57 83 c9 |
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>> Jul 13 22:50:02 orion kernel: EIP: [<001aa8e2>] strnlen+0x6/0x18 |
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>> SS:ESP 0068:c66d3b38 |
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>> Jul 13 22:50:02 orion kernel: CR2: 0000000000001033 |
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>> Jul 13 22:50:02 orion kernel: ---[ end trace 4a7d8fa933a5d5dd ]--- |
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>> |
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>> Jul 13 22:59:01 orion kernel: BUG: unable to handle kernel paging |
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>> request at 000010a1 |
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>> Jul 13 22:59:01 orion kernel: IP: [<001aa8e2>] strnlen+0x6/0x18 |
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>> Jul 13 22:59:01 orion kernel: *pdpt = 000000000df00001 *pde = |
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>> 0000000000000000 |
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>> Jul 13 22:59:01 orion kernel: Oops: 0000 [#2] |
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>> Jul 13 22:59:01 orion kernel: |
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>> Jul 13 22:59:01 orion kernel: Pid: 4257, comm: bash Tainted: |
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>> G D 3.4.0-rsbac #9 innotek GmbH VirtualBox |
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>> Jul 13 22:59:01 orion kernel: EIP: 0060:[<001aa8e2>] EFLAGS: |
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>> 00010217 CPU: 0 |
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>> Jul 13 22:59:01 orion kernel: EIP is at strnlen+0x6/0x18 |
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>> Jul 13 22:59:01 orion kernel: EAX: 000010a1 EBX: ce9c0869 ECX: |
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>> 000010a1 EDX: 0000000e |
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>> Jul 13 22:59:01 orion kernel: ESI: 000010a1 EDI: ce9c0869 EBP: |
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>> ce9c0ff5 ESP: c66cfb48 |
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>> Jul 13 22:59:01 orion kernel: DS: 0068 ES: 0068 FS: 0000 GS: 0000 |
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>> SS: 0068 |
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>> Jul 13 22:59:01 orion kernel: CR0: 8005003b CR2: 000010a1 CR3: |
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>> 01415000 CR4: 000006f0 |
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>> Jul 13 22:59:01 orion kernel: DR0: 00000000 DR1: 00000000 DR2: |
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>> 00000000 DR3: 00000000 |
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>> Jul 13 22:59:01 orion kernel: DR6: ffff0ff0 DR7: 00000400 |
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>> Jul 13 22:59:01 orion kernel: Process bash (pid: 4257, ti=e738ee3c |
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>> task=e738ebd0 task.ti=e738ee3c) |