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NVMe: handle allocation failure in nvme_map_user_pages()

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We should return here and avoid a NULL dereference.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
This commit is contained in:
Dan Carpenter 2012-01-20 07:55:30 -05:00 committed by Matthew Wilcox
parent c7d36ab8fa
commit 22fff826e7
1 changed files with 2 additions and 0 deletions
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drivers/block/nvme.c
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@ -1044,6 +1044,8 @@ static struct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write,
offset = offset_in_page(addr);
count = DIV_ROUND_UP(offset + length, PAGE_SIZE);
pages = kcalloc(count, sizeof(*pages), GFP_KERNEL);
if (!pages)
return ERR_PTR(-ENOMEM);
err = get_user_pages_fast(addr, count, 1, pages);
if (err < count) {