Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 2d15cab8 authored by Hugh Dickins's avatar Hugh Dickins Committed by Linus Torvalds
Browse files

[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: default avatarHugh Dickins <hugh@veritas.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus 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;