diff options
Diffstat (limited to 'net/netlink/genetlink.c')
| -rw-r--r-- | net/netlink/genetlink.c | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c index 994d9aff2093..72668759cd2b 100644 --- a/net/netlink/genetlink.c +++ b/net/netlink/genetlink.c @@ -536,6 +536,24 @@ static int genl_family_rcv_msg(const struct genl_family *family, if (ops->dumpit == NULL) return -EOPNOTSUPP; + if (!(ops->validate & GENL_DONT_VALIDATE_DUMP)) { + unsigned int validate = NL_VALIDATE_STRICT; + int hdrlen = GENL_HDRLEN + family->hdrsize; + + if (ops->validate & GENL_DONT_VALIDATE_DUMP_STRICT) + validate = NL_VALIDATE_LIBERAL; + + if (nlh->nlmsg_len < nlmsg_msg_size(hdrlen)) + return -EINVAL; + + rc = __nla_validate(nlmsg_attrdata(nlh, hdrlen), + nlmsg_attrlen(nlh, hdrlen), + family->maxattr, family->policy, + validate, extack); + if (rc) + return rc; + } + if (!family->parallel_ops) { struct netlink_dump_control c = { .module = family->module, @@ -577,9 +595,13 @@ static int genl_family_rcv_msg(const struct genl_family *family, attrbuf = family->attrbuf; if (attrbuf) { - err = nlmsg_parse_deprecated(nlh, hdrlen, attrbuf, - family->maxattr, family->policy, - extack); + enum netlink_validation validate = NL_VALIDATE_STRICT; + + if (ops->validate & GENL_DONT_VALIDATE_STRICT) + validate = NL_VALIDATE_LIBERAL; + + err = __nlmsg_parse(nlh, hdrlen, attrbuf, family->maxattr, + family->policy, validate, extack); if (err < 0) goto out; } @@ -939,6 +961,7 @@ static int genl_ctrl_event(int event, const struct genl_family *family, static const struct genl_ops genl_ctrl_ops[] = { { .cmd = CTRL_CMD_GETFAMILY, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, .doit = ctrl_getfamily, .dumpit = ctrl_dumpfamily, }, |