ocfs2: Add missing permission checks

Check that an online resize is being driven by a user with permission to
change system resource limits.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

diff --git a/fs/ocfs2/ioctl.c b/fs/ocfs2/ioctl.c
index 7003d58..5177fba 100644 (file)
--- a/fs/ocfs2/ioctl.c
+++ b/fs/ocfs2/ioctl.c
@@ -144,12 +144,18 @@ int ocfs2_ioctl(struct inode * inode, struct file * filp,
 
                return ocfs2_change_file_space(filp, cmd, &sr);
        case OCFS2_IOC_GROUP_EXTEND:
+               if (!capable(CAP_SYS_RESOURCE))
+                       return -EPERM;
+
                if (get_user(new_clusters, (int __user *)arg))
                        return -EFAULT;
 
                return ocfs2_group_extend(inode, new_clusters);
        case OCFS2_IOC_GROUP_ADD:
        case OCFS2_IOC_GROUP_ADD64:
+               if (!capable(CAP_SYS_RESOURCE))
+                       return -EPERM;
+
                if (copy_from_user(&input, (int __user *) arg, sizeof(input)))
                        return -EFAULT;