Btrfs: no slashes in subvolume names

Signed-off-by: Chris Mason <chris.mason@oracle.com>

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 62a3a77..1cabc19 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1831,6 +1831,8 @@ int btrfs_ioctl(struct inode *inode, struct file *filp, unsigned int
                namelen = strlen(vol_args.name);
                if (namelen > BTRFS_VOL_NAME_MAX)
                        return -EINVAL;
+               if (strchr(vol_args.name, '/'))
+                       return -EINVAL;
                path = btrfs_alloc_path();
                if (!path)
                        return -ENOMEM;