diff options
| -rw-r--r-- | net/core/rtnetlink.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index aa05e89cc47c..159c9c61e6af 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -3652,12 +3652,23 @@ static int rtnl_alt_ifname(int cmd, struct net_device *dev, struct nlattr *attr, bool *changed, struct netlink_ext_ack *extack) { char *alt_ifname; + size_t size; int err; err = nla_validate(attr, attr->nla_len, IFLA_MAX, ifla_policy, extack); if (err) return err; + if (cmd == RTM_NEWLINKPROP) { + size = rtnl_prop_list_size(dev); + size += nla_total_size(ALTIFNAMSIZ); + if (size >= U16_MAX) { + NL_SET_ERR_MSG(extack, + "effective property list too long"); + return -EINVAL; + } + } + alt_ifname = nla_strdup(attr, GFP_KERNEL_ACCOUNT); if (!alt_ifname) return -ENOMEM; |