[patch] NVMe: handle allocation failure in nvme_map_user_pages()
From: Dan Carpenter <hidden>
Date: 2012-01-20 07:55:26
Also in:
lkml
Subsystem:
block layer, the rest · Maintainers:
Jens Axboe, Linus Torvalds
We should return here and avoid a NULL dereference. Signed-off-by: Dan Carpenter <redacted>
diff --git a/drivers/block/nvme.c b/drivers/block/nvme.c
index f4996b0..d826726 100644
--- a/drivers/block/nvme.c
+++ b/drivers/block/nvme.c@@ -1042,6 +1042,8 @@ 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) {