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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 fix from Ingo Molnar:
 "Leftover from 4.0

  Fix a local stack variable corruption with certain kdump usage
  patterns (Dave Young)"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mm/numa: Fix kernel stack corruption in numa_init()->numa_clear_kernel_node_hotplug()
This commit is contained in:
Linus Torvalds 2015-04-13 13:34:46 -07:00
commit ec1bc8e4cf
1 changed files with 9 additions and 2 deletions
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11
arch/x86/mm/numa.c
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@ -482,9 +482,16 @@ static void __init numa_clear_kernel_node_hotplug(void)
&memblock.reserved, mb->nid);
}
/* Mark all kernel nodes. */
/*
* Mark all kernel nodes.
*
* When booting with mem=nn[kMG] or in a kdump kernel, numa_meminfo
* may not include all the memblock.reserved memory ranges because
* trim_snb_memory() reserves specific pages for Sandy Bridge graphics.
*/
for_each_memblock(reserved, r)
node_set(r->nid, numa_kernel_nodes);
if (r->nid != MAX_NUMNODES)
node_set(r->nid, numa_kernel_nodes);
/* Clear MEMBLOCK_HOTPLUG flag for memory in kernel nodes. */
for (i = 0; i < numa_meminfo.nr_blks; i++) {