Btrfs: no slashes in subvolume names

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

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 62a3a778d37d..1cabc1951b0e 100644
--- 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;