[PATCH] staging/lustre/llite: Use memdup_user() rather than duplicating its implementation

SF Markus Elfring
2016-08-21T09:45:07Z

Date: Sun, 21 Aug 2016 11:30:57 +0200

Reuse existing functionality from memdup_user() instead of keeping
duplicate source code.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
drivers/staging/lustre/lustre/llite/dir.c | 12 +++---------
1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/drivers/staging/lustre/lustre/llite/dir.c b/drivers/staging/lustre/lustre/llite/dir.c
index 031c9e4..8b70e42 100644
--- a/drivers/staging/lustre/lustre/llite/dir.c
+++ b/drivers/staging/lustre/lustre/llite/dir.c
@@ -1676,14 +1676,9 @@ out_poll:
case LL_IOC_QUOTACTL: {
struct if_quotactl *qctl;

- qctl = kzalloc(sizeof(*qctl), GFP_NOFS);
- if (!qctl)
- return -ENOMEM;
-
- if (copy_from_user(qctl, (void __user *)arg, sizeof(*qctl))) {
- rc = -EFAULT;
- goto out_quotactl;
- }
+ qctl = memdup_user((void __user *)arg, sizeof(*qctl));
+ if (IS_ERR(qctl))
+ return PTR_ERR(qctl);

rc = quotactl_ioctl(sbi, qctl);

@@ -1691,7 +1686,6 @@ out_poll:
sizeof(*qctl)))
rc = -EFAULT;

-out_quotactl:
kfree(qctl);
return rc;
}
--
2.9.3