[PATCH 6/8] efi/efi_test: Use memdup_user() as a cleanup

[Matt Fleming <matt-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>]

From: Ivan Hu <ivan.hu-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org>

Fix coccicheck warning which recommends to use memdup_user()

This patch fixes below coccicheck warnings:
drivers/firmware/efi/test/efi_test.c:269:8-15: WARNING opportunity for
memdup_user

Signed-off-by: Ivan Hu <ivan.hu-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org>
Cc: Ivan Khoronzhuk <ivan.khoronzhuk-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Cc: Ard Biesheuvel <ard.biesheuvel-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Signed-off-by: Matt Fleming <matt-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
---
 drivers/firmware/efi/test/efi_test.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/firmware/efi/test/efi_test.c b/drivers/firmware/efi/test/efi_test.c
index bb26e12b0cfd..8cd578f62059 100644
--- a/drivers/firmware/efi/test/efi_test.c
+++ b/drivers/firmware/efi/test/efi_test.c
@@ -265,14 +265,10 @@ static long efi_runtime_set_variable(unsigned long arg)
 			return rv;
 	}
 
-	data = kmalloc(setvariable.data_size, GFP_KERNEL);
-	if (!data) {
+	data = memdup_user(setvariable.data, setvariable.data_size);
+	if (IS_ERR(data)) {
 		kfree(name);
-		return -ENOMEM;
-	}
-	if (copy_from_user(data, setvariable.data, setvariable.data_size)) {
-		rv = -EFAULT;
-		goto out;
+		return PTR_ERR(data);
 	}
 
 	status = efi.set_variable(name, &vendor_guid,
-- 
2.10.0