pagewalk: fix walk_page_range() don't check find_vma() result properly
The doc of find_vma() says, /* Look up the first VMA which satisfies addr < vm_end, NULL if none. */ struct vm_area_struct *find_vma(struct mm_struct *mm, unsigned long addr) { (snip) Thus, caller should confirm whether the returned vma matches a desired one. Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Hiroyuki Kamezawa <kamezawa.hiroyuki@gmail.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Matt Mackall <mpm@selenic.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
parent
45ebb84025
commit
4b6ddbf7ed
|
@ -176,7 +176,7 @@ int walk_page_range(unsigned long addr, unsigned long end,
|
|||
* we can't handled it in the same manner as non-huge pages.
|
||||
*/
|
||||
vma = find_vma(walk->mm, addr);
|
||||
if (vma && is_vm_hugetlb_page(vma)) {
|
||||
if (vma && vma->vm_start <= addr && is_vm_hugetlb_page(vma)) {
|
||||
if (vma->vm_end < next)
|
||||
next = vma->vm_end;
|
||||
/*
|
||||
|
|
Loading…
Reference in a new issue