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ipv4: Use nlmsg_payload in route 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-v1-6-a1c75d493fd7@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Breno Leitao
2025-04-15 12:28:57 -07:00
committed by Jakub Kicinski
parent b411638fb9
commit d5ce0ed528
1 changed files with 2 additions and 2 deletions
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4
net/ipv4/route.c
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@@ -3205,7 +3205,8 @@ static int inet_rtm_valid_getroute_req(struct sk_buff *skb,
struct rtmsg *rtm;
int i, err;
if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*rtm))) {
rtm = nlmsg_payload(nlh, sizeof(*rtm));
if (!rtm) {
NL_SET_ERR_MSG(extack,
"ipv4: Invalid header for route get request");
return -EINVAL;
@@ -3215,7 +3216,6 @@ static int inet_rtm_valid_getroute_req(struct sk_buff *skb,
return nlmsg_parse_deprecated(nlh, sizeof(*rtm), tb, RTA_MAX,
rtm_ipv4_policy, extack);
rtm = nlmsg_data(nlh);
if ((rtm->rtm_src_len && rtm->rtm_src_len != 32) ||
(rtm->rtm_dst_len && rtm->rtm_dst_len != 32) ||
rtm->rtm_table || rtm->rtm_protocol ||