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mm/mempolicy.c: check return code of check_range 

Function check_range may return ERR_PTR(...). Check for it.

Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
Acked-by: David Rientjes <rientjes@google.com>
Reviewed-by: Christoph Lameter <cl@linux.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Vasiliy Kulikov 2010-10-26 14:21:32 -07:00 committed by Linus Torvalds
parent 74e3f3c339
commit 0def08e3ac
1 changed files with 4 additions and 1 deletions
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5
mm/mempolicy.c
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@ -924,12 +924,15 @@ static int migrate_to_node(struct mm_struct *mm, int source, int dest,
nodemask_t nmask;
LIST_HEAD(pagelist);
int err = 0;
struct vm_area_struct *vma;
nodes_clear(nmask);
node_set(source, nmask);
check_range(mm, mm->mmap->vm_start, mm->task_size, &nmask,
vma = check_range(mm, mm->mmap->vm_start, mm->task_size, &nmask,
flags | MPOL_MF_DISCONTIG_OK, &pagelist);
if (IS_ERR(vma))
return PTR_ERR(vma);
if (!list_empty(&pagelist)) {
err = migrate_pages(&pagelist, new_node_page, dest, 0);