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mm: fix cache mode tracking in vm_insert_mixed()

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commit 87744ab3832b83ba71b931f86f9cfdb000d07da5 upstream

vm_insert_mixed() unlike vm_insert_pfn_prot() and vmf_insert_pfn_pmd(),
fails to check the pgprot_t it uses for the mapping against the one
recorded in the memtype tracking tree.  Add the missing call to
track_pfn_insert() to preclude cases where incompatible aliased mappings
are established for a given physical address range.

[groeck: Backport to v4.4.y]

Link: http://lkml.kernel.org/r/147328717909.35069.14256589123570653697.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dan Williams 2016-10-07 17:00:18 -07:00 committed by Greg Kroah-Hartman
parent 0371d9c4c8
commit 9ac0dc7d94
1 changed files with 6 additions and 2 deletions
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8
mm/memory.c
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@ -1654,10 +1654,14 @@ EXPORT_SYMBOL(vm_insert_pfn_prot);
int vm_insert_mixed(struct vm_area_struct *vma, unsigned long addr,
unsigned long pfn)
{
pgprot_t pgprot = vma->vm_page_prot;
BUG_ON(!(vma->vm_flags & VM_MIXEDMAP));
if (addr < vma->vm_start || addr >= vma->vm_end)
return -EFAULT;
if (track_pfn_insert(vma, &pgprot, pfn))
return -EINVAL;
/*
* If we don't have pte special, then we have to use the pfn_valid()
@ -1670,9 +1674,9 @@ int vm_insert_mixed(struct vm_area_struct *vma, unsigned long addr,
struct page *page;
page = pfn_to_page(pfn);
return insert_page(vma, addr, page, vma->vm_page_prot);
return insert_page(vma, addr, page, pgprot);
}
return insert_pfn(vma, addr, pfn, vma->vm_page_prot);
return insert_pfn(vma, addr, pfn, pgprot);
}
EXPORT_SYMBOL(vm_insert_mixed);