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netlink: use caller's credentials in rtnl_handle_newlink

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Make sure rtnl_handle_newlink sets the caller's credential
during calls to ifc_create_ifp_nl and ifc_modify_ifp_nl

Reviewed by: glebius, melifaro
Approved by: glebius (mentor)
Differential Revision: https://reviews.freebsd.org/D54109
This commit is contained in:
Pouria Mousavizadeh Tehrani
2026-01-24 13:20:50 +03:30
parent cd730bef74
commit 04f6b99947
1 changed files with 10 additions and 2 deletions
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sys/netlink/route/iface.c
+10 -2
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@@ -675,6 +675,8 @@ static int
rtnl_handle_newlink(struct nlmsghdr *hdr, struct nlpcb *nlp, struct nl_pstate *npt)
{
struct nlattr_bmask bm;
struct thread *td = curthread;
struct ucred *cred;
int error;
struct nl_parsed_link attrs = {};
@@ -683,10 +685,16 @@ rtnl_handle_newlink(struct nlmsghdr *hdr, struct nlpcb *nlp, struct nl_pstate *n
return (error);
nl_get_attrs_bmask_nlmsg(hdr, &ifmsg_parser, &bm);
/* XXX: temporary patch until the D39180 review lands */
cred = td->td_ucred;
td->td_ucred = nlp_get_cred(nlp);
if (hdr->nlmsg_flags & NLM_F_CREATE)
return (create_link(hdr, &attrs, &bm, nlp, npt));
error = create_link(hdr, &attrs, &bm, nlp, npt);
else
return (modify_link(hdr, &attrs, &bm, nlp, npt));
error = modify_link(hdr, &attrs, &bm, nlp, npt);
td->td_ucred = cred;
return (error);
}
static void