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neighbour: Use nlmsg_payload in neightbl_valid_dump_info

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Update neightbl_valid_dump_info function to utilize the new
nlmsg_payload() helper function.

This change improves code clarity and safety by ensuring that the
Netlink message payload is properly validated before accessing its data.

Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://patch.msgid.link/20250414-nlmsg-v2-2-3d90cb42c6af@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Breno Leitao
2025-04-14 06:24:08 -07:00
committed by Jakub Kicinski
parent 95d06e92a4
commit 7527efe8a4
1 changed files with 2 additions and 2 deletions
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4
net/core/neighbour.c
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@@ -2430,12 +2430,12 @@ static int neightbl_valid_dump_info(const struct nlmsghdr *nlh,
{
struct ndtmsg *ndtm;
if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndtm))) {
ndtm = nlmsg_payload(nlh, sizeof(*ndtm));
if (!ndtm) {
NL_SET_ERR_MSG(extack, "Invalid header for neighbor table dump request");
return -EINVAL;
}
ndtm = nlmsg_data(nlh);
if (ndtm->ndtm_pad1 || ndtm->ndtm_pad2) {
NL_SET_ERR_MSG(extack, "Invalid values in header for neighbor table dump request");
return -EINVAL;