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Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

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Pull misc x86 fixes from Ingo Molnar:
 "This contains:

   - EFI fixes
   - a boot printout fix
   - ASLR/kASLR fixes
   - intel microcode driver fixes
   - other misc fixes

  Most of the linecount comes from an EFI revert"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mm/ASLR: Avoid PAGE_SIZE redefinition for UML subarch
  x86/microcode/intel: Handle truncated microcode images more robustly
  x86/microcode/intel: Guard against stack overflow in the loader
  x86, mm/ASLR: Fix stack randomization on 64-bit systems
  x86/mm/init: Fix incorrect page size in init_memory_mapping() printks
  x86/mm/ASLR: Propagate base load address calculation
  Documentation/x86: Fix path in zero-page.txt
  x86/apic: Fix the devicetree build in certain configs
  Revert "efi/libstub: Call get_memory_map() to obtain map and desc sizes"
  x86/efi: Avoid triple faults during EFI mixed mode calls
This commit is contained in:
Linus Torvalds
2015-02-21 10:41:29 -08:00
parent e2defd0271 570e1aa84c
commit 5fbe4c224c
20 changed files with 419 additions and 239 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
arch/x86/kernel/setup.c
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@@ -122,6 +122,8 @@
unsigned long max_low_pfn_mapped;
unsigned long max_pfn_mapped;
bool __read_mostly kaslr_enabled = false;
#ifdef CONFIG_DMI
RESERVE_BRK(dmi_alloc, 65536);
#endif
@@ -425,6 +427,11 @@ static void __init reserve_initrd(void)
}
#endif /* CONFIG_BLK_DEV_INITRD */
static void __init parse_kaslr_setup(u64 pa_data, u32 data_len)
{
kaslr_enabled = (bool)(pa_data + sizeof(struct setup_data));
}
static void __init parse_setup_data(void)
{
struct setup_data *data;
@@ -450,6 +457,9 @@ static void __init parse_setup_data(void)
case SETUP_EFI:
parse_efi_setup(pa_data, data_len);
break;
case SETUP_KASLR:
parse_kaslr_setup(pa_data, data_len);
break;
default:
break;
}
@@ -832,10 +842,14 @@ static void __init trim_low_memory_range(void)
static int
dump_kernel_offset(struct notifier_block *self, unsigned long v, void *p)
{
pr_emerg("Kernel Offset: 0x%lx from 0x%lx "
"(relocation range: 0x%lx-0x%lx)\n",
(unsigned long)&_text - __START_KERNEL, __START_KERNEL,
__START_KERNEL_map, MODULES_VADDR-1);
if (kaslr_enabled)
pr_emerg("Kernel Offset: 0x%lx from 0x%lx (relocation range: 0x%lx-0x%lx)\n",
(unsigned long)&_text - __START_KERNEL,
__START_KERNEL,
__START_KERNEL_map,
MODULES_VADDR-1);
else
pr_emerg("Kernel Offset: disabled\n");
return 0;
}