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mm: Don't touch uninitialized variable in do_pages_stat_array()

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Commit 80bba1290a removed one necessary
variable initialization.  As a result following warning happened:

    CC      mm/migrate.o
  mm/migrate.c: In function 'sys_move_pages':
  mm/migrate.c:1001: warning: 'err' may be used uninitialized in this function

More unfortunately, if find_vma() failed, kernel read uninitialized
memory.

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
CC: Brice Goglin <Brice.Goglin@inria.fr>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Nick Piggin <npiggin@suse.de>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
KOSAKI Motohiro 2008-12-16 16:06:43 +09:00 committed by Linus Torvalds
parent a3dd15444b
commit c095adbc21
1 changed files with 1 additions and 1 deletions
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2
mm/migrate.c
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@ -998,7 +998,7 @@ static void do_pages_stat_array(struct mm_struct *mm, unsigned long nr_pages,
unsigned long addr = (unsigned long)(*pages); unsigned long addr = (unsigned long)(*pages);
struct vm_area_struct *vma; struct vm_area_struct *vma;
struct page *page; struct page *page;
int err; int err = -EFAULT;
vma = find_vma(mm, addr); vma = find_vma(mm, addr);
if (!vma) if (!vma)