Commit 2d15cab8 authored Jun 25, 2005 by Hugh Dickins Committed by Linus Torvalds Jun 25, 2005

[PATCH] mm: fix remap_pte_range BUG



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>

parent 1e8a81c5

mm/memory.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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;

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