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ipv6: Use nlmsg_payload in inet6_rtm_valid_getaddr_req

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Leverage the new nlmsg_payload() helper to avoid checking for message
size and then reading the nlmsg data.

Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://patch.msgid.link/20250414-nlmsg-v2-7-3d90cb42c6af@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Breno Leitao
2025-04-14 06:24:13 -07:00
committed by Jakub Kicinski
parent e87187dfbb
commit 8cf1e30907
1 changed files with 2 additions and 2 deletions
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4
net/ipv6/addrconf.c
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@@ -5484,7 +5484,8 @@ static int inet6_rtm_valid_getaddr_req(struct sk_buff *skb,
struct ifaddrmsg *ifm;
int i, err;
if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
ifm = nlmsg_payload(nlh, sizeof(*ifm));
if (!ifm) {
NL_SET_ERR_MSG_MOD(extack, "Invalid header for get address request");
return -EINVAL;
}
@@ -5493,7 +5494,6 @@ static int inet6_rtm_valid_getaddr_req(struct sk_buff *skb,
return nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFA_MAX,
ifa_ipv6_policy, extack);
ifm = nlmsg_data(nlh);
if (ifm->ifa_prefixlen || ifm->ifa_flags || ifm->ifa_scope) {
NL_SET_ERR_MSG_MOD(extack, "Invalid values in header for get address request");
return -EINVAL;