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net: fib_rules: Use nlmsg_payload in fib_valid_dumprule_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-v2-9-3d90cb42c6af@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Breno Leitao 2025-04-14 06:24:15 -07:00 committed by Jakub Kicinski
parent 69a1ecfe47
commit 4c113c803f
1 changed files with 2 additions and 2 deletions
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4
net/core/fib_rules.c
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@ -1238,12 +1238,12 @@ static int fib_valid_dumprule_req(const struct nlmsghdr *nlh,
{
struct fib_rule_hdr *frh;
if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*frh))) {
frh = nlmsg_payload(nlh, sizeof(*frh));
if (!frh) {
NL_SET_ERR_MSG(extack, "Invalid header for fib rule dump request");
return -EINVAL;
}
frh = nlmsg_data(nlh);
if (frh->dst_len || frh->src_len || frh->tos || frh->table ||
frh->res1 || frh->res2 || frh->action || frh->flags) {
NL_SET_ERR_MSG(extack,