* Re: [PATCH 2/2] x86/KASLR/64: Determine kernel text mapping size at runtime
2016-12-08 7:56 ` [PATCH 2/2] x86/KASLR/64: Determine kernel text mapping size at runtime Baoquan He
@ 2016-12-08 8:17 ` Alexnader Kuleshov
2016-12-08 8:25 ` Baoquan He
2016-12-08 9:41 ` kbuild test robot
2016-12-08 9:41 ` kbuild test robot
2 siblings, 1 reply; 13+ messages in thread
From: Alexnader Kuleshov @ 2016-12-08 8:17 UTC (permalink / raw)
To: Baoquan He
Cc: linux-kernel, tglx, hpa, mingo, x86, keescook, yinghai, bp,
thgarnie, kuleshovmail, luto, anderson, dyoung, xlpang
Hello,
On 12-08-16, Baoquan He wrote:
> X86 64 kernel takes KERNEL_IMAGE_SIZE as the kernel text mapping size,
> and it's fixed as compiling time, changing from 512M to 1G as long as
> CONFIG_RANDOMIZE_BASE is enabled, though people specify kernel option
> "nokaslr" explicitly.
>
> This could be a wrong behaviour. CONFIG_RANDOMIZE_BASE should only decide
> if the KASLR code need be compiled in. If user specify "nokaslr", the
> kernel should behave as no KASLR code compiled in at all.
>
> So in this patch, define a new MACRO KERNEL_MAPPING_SIZE to represent the
> size of kernel text mapping area, and let KERNEL_IMAGE_SIZE limit the size
> of kernel runtime space. And change to determine the size of kernel text
> mapping area at runtime. Though KASLR code compiled in, if "nokaslr" specified,
> still set kernel mapping size to be 512M.
>
> Signed-off-by: Baoquan He <bhe@redhat.com>
> ---
> arch/x86/boot/compressed/kaslr.c | 15 ++++++++++-----
> arch/x86/include/asm/kaslr.h | 1 +
> arch/x86/include/asm/page_64_types.h | 19 +++++++++++--------
> arch/x86/include/asm/pgtable_64_types.h | 2 +-
> arch/x86/kernel/head64.c | 11 ++++++-----
> arch/x86/kernel/head_64.S | 3 ++-
> arch/x86/mm/dump_pagetables.c | 3 ++-
> arch/x86/mm/physaddr.c | 6 +++---
> 8 files changed, 36 insertions(+), 24 deletions(-)
>
> diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c
> index a66854d..3b73c76 100644
> --- a/arch/x86/boot/compressed/kaslr.c
> +++ b/arch/x86/boot/compressed/kaslr.c
> @@ -22,6 +22,8 @@
> static const char build_str[] = UTS_RELEASE " (" LINUX_COMPILE_BY "@"
> LINUX_COMPILE_HOST ") (" LINUX_COMPILER ") " UTS_VERSION;
>
> +unsigned long kernel_mapping_size = KERNEL_IMAGE_SIZE;
> +
> static unsigned long rotate_xor(unsigned long hash, const void *area,
> size_t size)
> {
> @@ -311,7 +313,7 @@ static void process_e820_entry(struct e820entry *entry,
> return;
>
> /* On 32-bit, ignore entries entirely above our maximum. */
> - if (IS_ENABLED(CONFIG_X86_32) && entry->addr >= KERNEL_IMAGE_SIZE)
> + if (IS_ENABLED(CONFIG_X86_32) && entry->addr >= kernel_mapping_size)
> return;
>
> /* Ignore entries entirely below our minimum. */
> @@ -341,8 +343,8 @@ static void process_e820_entry(struct e820entry *entry,
>
> /* On 32-bit, reduce region size to fit within max size. */
> if (IS_ENABLED(CONFIG_X86_32) &&
> - region.start + region.size > KERNEL_IMAGE_SIZE)
> - region.size = KERNEL_IMAGE_SIZE - region.start;
> + region.start + region.size > kernel_mapping_size)
> + region.size = kernel_mapping_size - region.start;
>
> /* Return if region can't contain decompressed kernel */
> if (region.size < image_size)
> @@ -408,9 +410,9 @@ static unsigned long find_random_virt_addr(unsigned long minimum,
> /*
> * There are how many CONFIG_PHYSICAL_ALIGN-sized slots
> * that can hold image_size within the range of minimum to
> - * KERNEL_IMAGE_SIZE?
> + * kernel_mapping_size?
> */
> - slots = (KERNEL_IMAGE_SIZE - minimum - image_size) /
> + slots = (kernel_mapping_size - minimum - image_size) /
> CONFIG_PHYSICAL_ALIGN + 1;
>
> random_addr = kaslr_get_random_long("Virtual") % slots;
> @@ -438,6 +440,9 @@ void choose_random_location(unsigned long input,
> return;
> }
>
> + if (IS_ENABLED(CONFIG_X86_64))
> + kernel_mapping_size = KERNEL_MAPPING_SIZE_EXT;
> +
> boot_params->hdr.loadflags |= KASLR_FLAG;
>
> /* Prepare to add new identity pagetables on demand. */
> diff --git a/arch/x86/include/asm/kaslr.h b/arch/x86/include/asm/kaslr.h
> index 1052a79..c4f5728 100644
> --- a/arch/x86/include/asm/kaslr.h
> +++ b/arch/x86/include/asm/kaslr.h
> @@ -7,6 +7,7 @@ unsigned long kaslr_get_random_long(const char *purpose);
> extern unsigned long page_offset_base;
> extern unsigned long vmalloc_base;
> extern unsigned long vmemmap_base;
> +extern unsigned long kernel_mapping_size;
>
> void kernel_randomize_memory(void);
> #else
> diff --git a/arch/x86/include/asm/page_64_types.h b/arch/x86/include/asm/page_64_types.h
> index 62a20ea..b8e79d7 100644
> --- a/arch/x86/include/asm/page_64_types.h
> +++ b/arch/x86/include/asm/page_64_types.h
> @@ -49,18 +49,21 @@
> #define __PHYSICAL_MASK_SHIFT 46
> #define __VIRTUAL_MASK_SHIFT 47
>
> +
> +/*
> + * Kernel image size is limited to 512 MB. The kernel code+data+bss
> + * must not be bigger than that.
> + */
> +#define KERNEL_IMAGE_SIZE (512 * 1024 * 1024)
> +
> /*
> - * Kernel image size is limited to 1GiB due to the fixmap living in the
> - * next 1GiB (see level2_kernel_pgt in arch/x86/kernel/head_64.S). Use
> - * 512MiB by default, leaving 1.5GiB for modules once the page tables
> + * Kernel mapping size is limited to 1GiB due to the fixmap living in
> + * the next 1GiB (see level2_kernel_pgt in arch/x86/kernel/head_64.S).
> + * Use 512MiB by default, leaving 1.5GiB for modules once the page tables
> * are fully set up. If kernel ASLR is configured, it can extend the
> * kernel page table mapping, reducing the size of the modules area.
> */
> #define KERNEL_MAPPING_SIZE_EXT (1024 * 1024 * 1024)
> -#if defined(CONFIG_RANDOMIZE_BASE)
> -#define KERNEL_IMAGE_SIZE KERNEL_MAPPING_SIZE_EXT
> -#else
> -#define KERNEL_IMAGE_SIZE (512 * 1024 * 1024)
> -#endif
> +#define KERNEL_MAPPING_SIZE kernel_mapping_size
After applying these patches I'm getting:
CC arch/x86/kernel/setup.o
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",
^~~~~~~~
scripts/Makefile.build:293: recipe for target 'arch/x86/kernel/setup.o' failed
make[2]: *** [arch/x86/kernel/setup.o] Error 1
scripts/Makefile.build:544: recipe for target 'arch/x86/kernel' failed
make[1]: *** [arch/x86/kernel] Error 2
Makefile:988: recipe for target 'arch/x86' failed
make: *** [arch/x86] Error 2
here with disabled CONFIG_RANDOMIZE_MEMORY.
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [PATCH 2/2] x86/KASLR/64: Determine kernel text mapping size at runtime
2016-12-08 8:17 ` Alexnader Kuleshov
@ 2016-12-08 8:25 ` Baoquan He
0 siblings, 0 replies; 13+ messages in thread
From: Baoquan He @ 2016-12-08 8:25 UTC (permalink / raw)
To: Alexnader Kuleshov
Cc: linux-kernel, tglx, hpa, mingo, x86, keescook, yinghai, bp,
thgarnie, luto, anderson, dyoung, xlpang
On 12/08/16 at 02:17pm, Alexnader Kuleshov wrote:
> Hello,
>
> On 12-08-16, Baoquan He wrote:
> > #define KERNEL_MAPPING_SIZE_EXT (1024 * 1024 * 1024)
> > -#if defined(CONFIG_RANDOMIZE_BASE)
> > -#define KERNEL_IMAGE_SIZE KERNEL_MAPPING_SIZE_EXT
> > -#else
> > -#define KERNEL_IMAGE_SIZE (512 * 1024 * 1024)
> > -#endif
> > +#define KERNEL_MAPPING_SIZE kernel_mapping_size
Thanks for telling. I forget testing this case. Checking.
>
> After applying these patches I'm getting:
>
> CC arch/x86/kernel/setup.o
> 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",
> ^~~~~~~~
> scripts/Makefile.build:293: recipe for target 'arch/x86/kernel/setup.o' failed
> make[2]: *** [arch/x86/kernel/setup.o] Error 1
> scripts/Makefile.build:544: recipe for target 'arch/x86/kernel' failed
> make[1]: *** [arch/x86/kernel] Error 2
> Makefile:988: recipe for target 'arch/x86' failed
> make: *** [arch/x86] Error 2
>
> here with disabled CONFIG_RANDOMIZE_MEMORY.
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [PATCH 2/2] x86/KASLR/64: Determine kernel text mapping size at runtime
2016-12-08 7:56 ` [PATCH 2/2] x86/KASLR/64: Determine kernel text mapping size at runtime Baoquan He
2016-12-08 8:17 ` Alexnader Kuleshov
@ 2016-12-08 9:41 ` kbuild test robot
2016-12-08 13:41 ` Baoquan He
2016-12-08 9:41 ` kbuild test robot
2 siblings, 1 reply; 13+ messages in thread
From: kbuild test robot @ 2016-12-08 9:41 UTC (permalink / raw)
To: Baoquan He
Cc: kbuild-all, linux-kernel, tglx, hpa, mingo, x86, keescook,
yinghai, bp, thgarnie, kuleshovmail, luto, anderson, dyoung,
xlpang, Baoquan He
[-- Attachment #1: Type: text/plain, Size: 10166 bytes --]
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
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 23426 bytes --]
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [PATCH 2/2] x86/KASLR/64: Determine kernel text mapping size at runtime
2016-12-08 9:41 ` kbuild test robot
@ 2016-12-08 13:41 ` Baoquan He
0 siblings, 0 replies; 13+ messages in thread
From: Baoquan He @ 2016-12-08 13:41 UTC (permalink / raw)
To: kbuild test robot
Cc: kbuild-all, linux-kernel, tglx, hpa, mingo, x86, keescook,
yinghai, bp, thgarnie, kuleshovmail, luto, anderson, dyoung,
xlpang
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
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [PATCH 2/2] x86/KASLR/64: Determine kernel text mapping size at runtime
2016-12-08 7:56 ` [PATCH 2/2] x86/KASLR/64: Determine kernel text mapping size at runtime Baoquan He
2016-12-08 8:17 ` Alexnader Kuleshov
2016-12-08 9:41 ` kbuild test robot
@ 2016-12-08 9:41 ` kbuild test robot
2 siblings, 0 replies; 13+ messages in thread
From: kbuild test robot @ 2016-12-08 9:41 UTC (permalink / raw)
To: Baoquan He
Cc: kbuild-all, linux-kernel, tglx, hpa, mingo, x86, keescook,
yinghai, bp, thgarnie, kuleshovmail, luto, anderson, dyoung,
xlpang, Baoquan He
[-- Attachment #1: Type: text/plain, Size: 7529 bytes --]
Hi Baoquan,
[auto build test WARNING on tip/x86/core]
[also build test WARNING 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-x014-201649 (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 warnings (new ones prefixed by >>):
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 '__phys_addr':
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:168:42: note: in definition of macro 'unlikely'
# define unlikely(x) __builtin_expect(!!(x), 0)
^
include/linux/mmdebug.h:55:30: note: in expansion of macro 'BUG_ON'
#define VIRTUAL_BUG_ON(cond) BUG_ON(cond)
^~~~~~
>> arch/x86/mm/physaddr.c:21:3: note: in expansion of macro 'VIRTUAL_BUG_ON'
VIRTUAL_BUG_ON(y >= KERNEL_MAPPING_SIZE);
^~~~~~~~~~~~~~
arch/x86/mm/physaddr.c:21:23: note: in expansion of macro 'KERNEL_MAPPING_SIZE'
VIRTUAL_BUG_ON(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:168:42: note: in definition of macro 'unlikely'
# define unlikely(x) __builtin_expect(!!(x), 0)
^
include/linux/mmdebug.h:55:30: note: in expansion of macro 'BUG_ON'
#define VIRTUAL_BUG_ON(cond) BUG_ON(cond)
^~~~~~
>> arch/x86/mm/physaddr.c:21:3: note: in expansion of macro 'VIRTUAL_BUG_ON'
VIRTUAL_BUG_ON(y >= KERNEL_MAPPING_SIZE);
^~~~~~~~~~~~~~
arch/x86/mm/physaddr.c:21:23: note: in expansion of macro 'KERNEL_MAPPING_SIZE'
VIRTUAL_BUG_ON(y >= KERNEL_MAPPING_SIZE);
^~~~~~~~~~~~~~~~~~~
arch/x86/mm/physaddr.c: In function '__phys_addr_symbol':
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:168:42: note: in definition of macro 'unlikely'
# define unlikely(x) __builtin_expect(!!(x), 0)
^
include/linux/mmdebug.h:55:30: note: in expansion of macro 'BUG_ON'
#define VIRTUAL_BUG_ON(cond) BUG_ON(cond)
^~~~~~
arch/x86/mm/physaddr.c:38:2: note: in expansion of macro 'VIRTUAL_BUG_ON'
VIRTUAL_BUG_ON(y >= KERNEL_MAPPING_SIZE);
^~~~~~~~~~~~~~
arch/x86/mm/physaddr.c:38:22: note: in expansion of macro 'KERNEL_MAPPING_SIZE'
VIRTUAL_BUG_ON(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/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
^
>> 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 +/VIRTUAL_BUG_ON +21 arch/x86/mm/physaddr.c
5
6 #include <asm/page.h>
7
8 #include "physaddr.h"
9
10 #ifdef CONFIG_X86_64
11
12 #ifdef CONFIG_DEBUG_VIRTUAL
13 unsigned long __phys_addr(unsigned long x)
14 {
15 unsigned long y = x - __START_KERNEL_map;
16
17 /* use the carry flag to determine if x was < __START_KERNEL_map */
18 if (unlikely(x > y)) {
19 x = y + phys_base;
20
> 21 VIRTUAL_BUG_ON(y >= KERNEL_MAPPING_SIZE);
22 } else {
23 x = y + (__START_KERNEL_map - PAGE_OFFSET);
24
25 /* carry flag will be set if starting x was >= PAGE_OFFSET */
26 VIRTUAL_BUG_ON((x > y) || !phys_addr_valid(x));
27 }
28
29 return x;
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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^ permalink raw reply [flat|nested] 13+ messages in thread