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[PATCH] mm: fix remap_pte_range BUG

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Out-of-tree user of remap_pfn_range hit kernel BUG at mm/memory.c:1112!  It
passes an unrounded size to remap_pfn_range, which was okay before 2.6.12,
but misses remap_pte_range's new end condition.  An audit of all the other
ptwalks confirms that this is the only one so exposed.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Hugh Dickins 2005-06-25 14:54:33 -07:00 committed by Linus Torvalds
parent 1e8a81c5a3
commit 2d15cab85b
1 changed files with 1 additions and 1 deletions
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2
mm/memory.c
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@ -1139,7 +1139,7 @@ int remap_pfn_range(struct vm_area_struct *vma, unsigned long addr,
{
pgd_t *pgd;
unsigned long next;
unsigned long end = addr + size;
unsigned long end = addr + PAGE_ALIGN(size);
struct mm_struct *mm = vma->vm_mm;
int err;