Re: [PATCH 2/2] x86/KASLR/64: Determine kernel text mapping size at runtime

From: Baoquan He
Date: Thu Dec 08 2016 - 08:41:44 EST

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Thanks, have changed. Will repost after i386 test is OK.

On 12/08/16 at 05:41pm, kbuild test robot wrote:
> Hi Baoquan,
>
> [auto build test ERROR on tip/x86/core]
> [also build test ERROR on v4.9-rc8 next-20161208]
> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
>
> url: https://github.com/0day-ci/linux/commits/Baoquan-He/Determine-kernel-text-mapping-size-at-runtime-for-x86_64/20161208-172019
> config: x86_64-randconfig-x017-201649 (attached as .config)
> compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
> reproduce:
> # save the attached .config to linux build tree
> make ARCH=x86_64
>
> All error/warnings (new ones prefixed by >>):
>
> In file included from arch/x86/include/asm/page_types.h:47:0,
> from arch/x86/include/asm/page.h:8,
> from arch/x86/include/asm/thread_info.h:11,
> from include/linux/thread_info.h:58,
> from arch/x86/include/asm/preempt.h:6,
> from include/linux/preempt.h:59,
> from include/linux/spinlock.h:50,
> from include/linux/seqlock.h:35,
> from include/linux/time.h:5,
> from include/uapi/linux/timex.h:56,
> from include/linux/timex.h:56,
> from include/linux/sched.h:19,
> from arch/x86/kernel/setup.c:24:
> arch/x86/kernel/setup.c: In function 'dump_kernel_offset':
> arch/x86/include/asm/page_64_types.h:67:29: error: 'kernel_mapping_size' undeclared (first use in this function)
> #define KERNEL_MAPPING_SIZE kernel_mapping_size
> ^
> >> arch/x86/include/asm/pgtable_64_types.h:69:48: note: in expansion of macro 'KERNEL_MAPPING_SIZE'
> #define MODULES_VADDR (__START_KERNEL_map + KERNEL_MAPPING_SIZE)
> ^~~~~~~~~~~~~~~~~~~
> >> include/linux/printk.h:271:35: note: in expansion of macro 'MODULES_VADDR'
> printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
> ^~~~~~~~~~~
> >> arch/x86/kernel/setup.c:826:3: note: in expansion of macro 'pr_emerg'
> pr_emerg("Kernel Offset: 0x%lx from 0x%lx (relocation range: 0x%lx-0x%lx)\n",
> ^~~~~~~~
> arch/x86/include/asm/page_64_types.h:67:29: note: each undeclared identifier is reported only once for each function it appears in
> #define KERNEL_MAPPING_SIZE kernel_mapping_size
> ^
> >> arch/x86/include/asm/pgtable_64_types.h:69:48: note: in expansion of macro 'KERNEL_MAPPING_SIZE'
> #define MODULES_VADDR (__START_KERNEL_map + KERNEL_MAPPING_SIZE)
> ^~~~~~~~~~~~~~~~~~~
> >> include/linux/printk.h:271:35: note: in expansion of macro 'MODULES_VADDR'
> printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
> ^~~~~~~~~~~
> >> arch/x86/kernel/setup.c:826:3: note: in expansion of macro 'pr_emerg'
> pr_emerg("Kernel Offset: 0x%lx from 0x%lx (relocation range: 0x%lx-0x%lx)\n",
> ^~~~~~~~
> --
> In file included from include/uapi/linux/stddef.h:1:0,
> from include/linux/stddef.h:4,
> from include/uapi/linux/posix_types.h:4,
> from include/uapi/linux/types.h:13,
> from include/linux/types.h:5,
> from include/linux/list.h:4,
> from include/linux/module.h:9,
> from include/linux/moduleloader.h:5,
> from arch/x86/kernel/module.c:21:
> arch/x86/kernel/module.c: In function 'module_alloc':
> arch/x86/include/asm/page_64_types.h:67:29: error: 'kernel_mapping_size' undeclared (first use in this function)
> #define KERNEL_MAPPING_SIZE kernel_mapping_size
> ^
> include/linux/compiler.h:149:30: note: in definition of macro '__trace_if'
> if (__builtin_constant_p(!!(cond)) ? !!(cond) : \
> ^~~~
> >> arch/x86/kernel/module.c:83:2: note: in expansion of macro 'if'
> if (PAGE_ALIGN(size) > MODULES_LEN)
> ^~
> >> arch/x86/include/asm/pgtable_64_types.h:69:48: note: in expansion of macro 'KERNEL_MAPPING_SIZE'
> #define MODULES_VADDR (__START_KERNEL_map + KERNEL_MAPPING_SIZE)
> ^~~~~~~~~~~~~~~~~~~
> >> arch/x86/include/asm/pgtable_64_types.h:71:38: note: in expansion of macro 'MODULES_VADDR'
> #define MODULES_LEN (MODULES_END - MODULES_VADDR)
> ^~~~~~~~~~~~~
> >> arch/x86/kernel/module.c:83:25: note: in expansion of macro 'MODULES_LEN'
> if (PAGE_ALIGN(size) > MODULES_LEN)
> ^~~~~~~~~~~
> arch/x86/include/asm/page_64_types.h:67:29: note: each undeclared identifier is reported only once for each function it appears in
> #define KERNEL_MAPPING_SIZE kernel_mapping_size
> ^
> include/linux/compiler.h:149:30: note: in definition of macro '__trace_if'
> if (__builtin_constant_p(!!(cond)) ? !!(cond) : \
> ^~~~
> >> arch/x86/kernel/module.c:83:2: note: in expansion of macro 'if'
> if (PAGE_ALIGN(size) > MODULES_LEN)
> ^~
> >> arch/x86/include/asm/pgtable_64_types.h:69:48: note: in expansion of macro 'KERNEL_MAPPING_SIZE'
> #define MODULES_VADDR (__START_KERNEL_map + KERNEL_MAPPING_SIZE)
> ^~~~~~~~~~~~~~~~~~~
> >> arch/x86/include/asm/pgtable_64_types.h:71:38: note: in expansion of macro 'MODULES_VADDR'
> #define MODULES_LEN (MODULES_END - MODULES_VADDR)
> ^~~~~~~~~~~~~
> >> arch/x86/kernel/module.c:83:25: note: in expansion of macro 'MODULES_LEN'
> if (PAGE_ALIGN(size) > MODULES_LEN)
> ^~~~~~~~~~~
> --
> In file included from include/linux/linkage.h:4:0,
> from include/linux/preempt.h:9,
> from include/linux/spinlock.h:50,
> from include/linux/mmzone.h:7,
> from include/linux/bootmem.h:7,
> from arch/x86/mm/physaddr.c:1:
> arch/x86/mm/physaddr.c: In function '__virt_addr_valid':
> arch/x86/include/asm/page_64_types.h:67:29: error: 'kernel_mapping_size' undeclared (first use in this function)
> #define KERNEL_MAPPING_SIZE kernel_mapping_size
> ^
> include/linux/compiler.h:149:30: note: in definition of macro '__trace_if'
> if (__builtin_constant_p(!!(cond)) ? !!(cond) : \
> ^~~~
> >> arch/x86/mm/physaddr.c:53:3: note: in expansion of macro 'if'
> if (y >= KERNEL_MAPPING_SIZE)
> ^~
> >> arch/x86/mm/physaddr.c:53:12: note: in expansion of macro 'KERNEL_MAPPING_SIZE'
> if (y >= KERNEL_MAPPING_SIZE)
> ^~~~~~~~~~~~~~~~~~~
> arch/x86/include/asm/page_64_types.h:67:29: note: each undeclared identifier is reported only once for each function it appears in
> #define KERNEL_MAPPING_SIZE kernel_mapping_size
> ^
> include/linux/compiler.h:149:30: note: in definition of macro '__trace_if'
> if (__builtin_constant_p(!!(cond)) ? !!(cond) : \
> ^~~~
> >> arch/x86/mm/physaddr.c:53:3: note: in expansion of macro 'if'
> if (y >= KERNEL_MAPPING_SIZE)
> ^~
> >> arch/x86/mm/physaddr.c:53:12: note: in expansion of macro 'KERNEL_MAPPING_SIZE'
> if (y >= KERNEL_MAPPING_SIZE)
> ^~~~~~~~~~~~~~~~~~~
> --
> In file included from arch/x86/include/asm/page_types.h:47:0,
> from arch/x86/include/asm/page.h:8,
> from arch/x86/include/asm/thread_info.h:11,
> from include/linux/thread_info.h:58,
> from arch/x86/include/asm/preempt.h:6,
> from include/linux/preempt.h:59,
> from include/linux/spinlock.h:50,
> from include/linux/wait.h:8,
> from include/linux/fs.h:5,
> from include/linux/debugfs.h:18,
> from arch/x86/mm/dump_pagetables.c:15:
> arch/x86/mm/dump_pagetables.c: In function 'pt_dump_init':
> arch/x86/include/asm/page_64_types.h:67:29: error: 'kernel_mapping_size' undeclared (first use in this function)
> #define KERNEL_MAPPING_SIZE kernel_mapping_size
> ^
> >> arch/x86/include/asm/pgtable_64_types.h:69:48: note: in expansion of macro 'KERNEL_MAPPING_SIZE'
> #define MODULES_VADDR (__START_KERNEL_map + KERNEL_MAPPING_SIZE)
> ^~~~~~~~~~~~~~~~~~~
> >> arch/x86/mm/dump_pagetables.c:445:52: note: in expansion of macro 'MODULES_VADDR'
> address_markers[MODULES_VADDR_NR].start_address = MODULES_VADDR;
> ^~~~~~~~~~~~~
> arch/x86/include/asm/page_64_types.h:67:29: note: each undeclared identifier is reported only once for each function it appears in
> #define KERNEL_MAPPING_SIZE kernel_mapping_size
> ^
> >> arch/x86/include/asm/pgtable_64_types.h:69:48: note: in expansion of macro 'KERNEL_MAPPING_SIZE'
> #define MODULES_VADDR (__START_KERNEL_map + KERNEL_MAPPING_SIZE)
> ^~~~~~~~~~~~~~~~~~~
> >> arch/x86/mm/dump_pagetables.c:445:52: note: in expansion of macro 'MODULES_VADDR'
> address_markers[MODULES_VADDR_NR].start_address = MODULES_VADDR;
> ^~~~~~~~~~~~~
>
> vim +/kernel_mapping_size +67 arch/x86/include/asm/page_64_types.h
>
> 61 * the next 1GiB (see level2_kernel_pgt in arch/x86/kernel/head_64.S).
> 62 * Use 512MiB by default, leaving 1.5GiB for modules once the page tables
> 63 * are fully set up. If kernel ASLR is configured, it can extend the
> 64 * kernel page table mapping, reducing the size of the modules area.
> 65 */
> 66 #define KERNEL_MAPPING_SIZE_EXT (1024 * 1024 * 1024)
> > 67 #define KERNEL_MAPPING_SIZE kernel_mapping_size
> 68
> 69 #endif /* _ASM_X86_PAGE_64_DEFS_H */
>
> ---
> 0-DAY kernel test infrastructure Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all Intel Corporation

Next message: Bartlomiej Zolnierkiewicz: "Re: [RFC PATCH 00/19] ide: remove deprecated host drivers (part 1)"
Previous message: Måns Rullgård: "Re: Tearing down DMA transfer setup after DMA client has finished"
In reply to: kbuild test robot: "Re: [PATCH 2/2] x86/KASLR/64: Determine kernel text mapping size at runtime"
Next in thread: kbuild test robot: "Re: [PATCH 2/2] x86/KASLR/64: Determine kernel text mapping size at runtime"
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