diff options
| author | Geyslan G. Bem <geyslan@gmail.com> | 2013-10-14 12:18:25 -0300 |
|---|---|---|
| committer | Chris Mason <chris.mason@fusionio.com> | 2013-11-11 22:01:51 -0500 |
| commit | 229eed4348a482c11cf8d494392305a85ed478f9 (patch) | |
| tree | 75a61b745783374021ac35d2f367377cdbffd114 /fs/btrfs | |
| parent | 5ede859b00af261c78b3848a362253c76652e035 (diff) | |
btrfs: simplify kmalloc+copy_from_user to memdup_user
Use memdup_user rather than duplicating its implementation
This is a little bit restricted to reduce false positives
The semantic patch that makes this report is available
in scripts/coccinelle/api/memdup_user.cocci.
More information about semantic patching is available at
http://coccinelle.lip6.fr/
Signed-off-by: Geyslan G. Bem <geyslan@gmail.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/ioctl.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 08ac53c5f78d..864aab4b1bfa 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -2715,15 +2715,10 @@ static long btrfs_ioctl_file_extent_same(struct file *file, size = sizeof(tmp) + tmp.dest_count * sizeof(struct btrfs_ioctl_same_extent_info); - same = kmalloc(size, GFP_NOFS); - if (!same) { - ret = -EFAULT; - goto out; - } + same = memdup_user((struct btrfs_ioctl_same_args __user *)argp, size); - if (copy_from_user(same, - (struct btrfs_ioctl_same_args __user *)argp, size)) { - ret = -EFAULT; + if (IS_ERR(same)) { + ret = PTR_ERR(same); goto out; } |