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ipv4: Use nlmsg_payload in fib_frontend 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-v1-5-a1c75d493fd7@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Breno Leitao
2025-04-15 12:28:56 -07:00
committed by Jakub Kicinski
parent 7d82cc229c
commit b411638fb9
1 changed files with 2 additions and 2 deletions
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4
net/ipv4/fib_frontend.c
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@@ -948,12 +948,12 @@ int ip_valid_fib_dump_req(struct net *net, const struct nlmsghdr *nlh,
if (filter->rtnl_held)
ASSERT_RTNL();
if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*rtm))) {
rtm = nlmsg_payload(nlh, sizeof(*rtm));
if (!rtm) {
NL_SET_ERR_MSG(extack, "Invalid header for FIB dump request");
return -EINVAL;
}
rtm = nlmsg_data(nlh);
if (rtm->rtm_dst_len || rtm->rtm_src_len || rtm->rtm_tos ||
rtm->rtm_scope) {
NL_SET_ERR_MSG(extack, "Invalid values in header for FIB dump request");