440                 Qcow2UnknownHeaderExtension *uext;  in qcow2_read_extensions()  local
442                 uext = g_malloc0(sizeof(*uext)  + ext.len);  in qcow2_read_extensions()
443                 uext->magic = ext.magic;  in qcow2_read_extensions()
444                 uext->len = ext.len;  in qcow2_read_extensions()
445                 QLIST_INSERT_HEAD(&s->unknown_header_ext, uext, next);  in qcow2_read_extensions()
447                 ret = bdrv_co_pread(bs->file, offset, uext->len, uext->data, 0);  in qcow2_read_extensions()
466     Qcow2UnknownHeaderExtension *uext, *next;  in cleanup_unknown_header_ext()  local
468     QLIST_FOREACH_SAFE(uext, &s->unknown_header_ext, next, next) {  in cleanup_unknown_header_ext()
469         QLIST_REMOVE(uext, next);  in cleanup_unknown_header_ext()
470         g_free(uext);  in cleanup_unknown_header_ext()
2931     Qcow2UnknownHeaderExtension *uext;  in qcow2_update_header()  local
3130     QLIST_FOREACH(uext, &s->unknown_header_ext, next) {  in qcow2_update_header()
3131         ret = header_ext_add(buf, uext->magic, uext->data, uext->len, buflen);  in qcow2_update_header()