[PATCH 13/14] mm: mempolicy: Check return code of check_range

[Kulikov Vasiliy]

From: Vasiliy Kulikov <segooon@xxxxxxxxx>

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

Signed-off-by: Vasiliy Kulikov <segooon@xxxxxxxxx>
---
 Compile tested.

 mm/mempolicy.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index f969da5..b73f02c 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -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);
-- 
1.7.0.4

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