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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 x86 fixes from Ingo Molnar:

 - Fix an early boot crash in the RSDP parsing code by effectively
   turning off the parsing call - we ran out of time but want to fix the
   regression. The more involved fix is being worked on.

 - Fix a crash that can trigger in the kmemlek code.

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mm: Fix a crash with kmemleak_scan()
  x86/boot: Disable RSDP parsing temporarily
This commit is contained in:
Linus Torvalds 2019-04-27 10:21:29 -07:00
commit 037904a22b
2 changed files with 7 additions and 1 deletions
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2
arch/x86/boot/compressed/misc.c
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@ -352,7 +352,7 @@ asmlinkage __visible void *extract_kernel(void *rmode, memptr heap,
boot_params->hdr.loadflags &= ~KASLR_FLAG;
/* Save RSDP address for later use. */
boot_params->acpi_rsdp_addr = get_rsdp_addr();
/* boot_params->acpi_rsdp_addr = get_rsdp_addr(); */
sanitize_boot_params(boot_params);

6
arch/x86/mm/init.c
View File

@ -5,6 +5,7 @@
#include <linux/memblock.h>
#include <linux/swapfile.h>
#include <linux/swapops.h>
#include <linux/kmemleak.h>
#include <asm/set_memory.h>
#include <asm/e820/api.h>
@ -766,6 +767,11 @@ void free_init_pages(const char *what, unsigned long begin, unsigned long end)
if (debug_pagealloc_enabled()) {
pr_info("debug: unmapping init [mem %#010lx-%#010lx]\n",
begin, end - 1);
/*
* Inform kmemleak about the hole in the memory since the
* corresponding pages will be unmapped.
*/
kmemleak_free_part((void *)begin, end - begin);
set_memory_np(begin, (end - begin) >> PAGE_SHIFT);
} else {
/*