[fs/9p] Plug potential acl leak

In v9fs_get_acl() if __v9fs_get_acl() gets only one of the
dacl/pacl we are not releasing it.

Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

fs/9p/acl.c

@@ -71,11 +71,15 @@ int v9fs_get_acl(struct inode *inode, struct p9_fid *fid)
 	if (!IS_ERR(dacl) && !IS_ERR(pacl)) {
 		set_cached_acl(inode, ACL_TYPE_DEFAULT, dacl);
 		set_cached_acl(inode, ACL_TYPE_ACCESS, pacl);
-		posix_acl_release(dacl);
-		posix_acl_release(pacl);
 	} else
 		retval = -EIO;
 
+	if (!IS_ERR(dacl))
+		posix_acl_release(dacl);
+
+	if (!IS_ERR(pacl))
+		posix_acl_release(pacl);
+
 	return retval;
 }