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ipv4: Use nlmsg_payload in devinet file

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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/20250415-nlmsg_v2-v1-4-a1c75d493fd7@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Breno Leitao 2025-04-15 12:28:55 -07:00 committed by Jakub Kicinski
parent bc05add844
commit 7d82cc229c
1 changed files with 2 additions and 2 deletions
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4
net/ipv4/devinet.c
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@ -1792,12 +1792,12 @@ static int inet_valid_dump_ifaddr_req(const struct nlmsghdr *nlh,
struct ifaddrmsg *ifm;
int err, i;
if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
ifm = nlmsg_payload(nlh, sizeof(*ifm));
if (!ifm) {
NL_SET_ERR_MSG(extack, "ipv4: Invalid header for address dump request");
return -EINVAL;
}
ifm = nlmsg_data(nlh);
if (ifm->ifa_prefixlen || ifm->ifa_flags || ifm->ifa_scope) {
NL_SET_ERR_MSG(extack, "ipv4: Invalid values in header for address dump request");
return -EINVAL;