Date: Fri, 29 Sep 2023 22:10:51 GMT From: Kristof Provost <kp@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: aefda9c92da6 - main - pf: ensure 'off' is always set before use Message-ID: <202309292210.38TMApnC044873@gitrepo.freebsd.org>
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The branch main has been updated by kp: URL: https://cgit.FreeBSD.org/src/commit/?id=aefda9c92da6571d405e1b27c5c68333ad8bbc57 commit aefda9c92da6571d405e1b27c5c68333ad8bbc57 Author: Kristof Provost <kp@FreeBSD.org> AuthorDate: 2023-09-28 07:04:32 +0000 Commit: Kristof Provost <kp@FreeBSD.org> CommitDate: 2023-09-29 22:10:32 +0000 pf: ensure 'off' is always set before use If we bail out early from pf_test(6)() we still need to clean up/finish SCTP multihome work, which requires the 'off' value to be set. Set it early enough. MFC after: 3 days Sponsored by: Orange Business Services --- sys/netpfil/pf/pf.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/sys/netpfil/pf/pf.c b/sys/netpfil/pf/pf.c index df4bd47c35d5..baa34b16f487 100644 --- a/sys/netpfil/pf/pf.c +++ b/sys/netpfil/pf/pf.c @@ -7698,6 +7698,9 @@ pf_test(int dir, int pflags, struct ifnet *ifp, struct mbuf **m0, pd.af = AF_INET; pd.act.rtableid = -1; + h = mtod(m, struct ip *); + off = h->ip_hl << 2; + if (__predict_false(ip_divert_ptr != NULL) && ((ipfwtag = m_tag_locate(m, MTAG_IPFW_RULE, 0, NULL)) != NULL)) { struct ipfw_rule_ref *rr = (struct ipfw_rule_ref *)(ipfwtag+1); @@ -8249,6 +8252,9 @@ pf_test6(int dir, int pflags, struct ifnet *ifp, struct mbuf **m0, struct inpcb pd.af = AF_INET6; pd.act.rtableid = -1; + h = mtod(m, struct ip6_hdr *); + off = ((caddr_t)h - m->m_data) + sizeof(struct ip6_hdr); + /* We do IP header normalization and packet reassembly here */ if (pf_normalize_ip6(m0, kif, &reason, &pd) != PF_PASS) { action = PF_DROP; @@ -8256,6 +8262,7 @@ pf_test6(int dir, int pflags, struct ifnet *ifp, struct mbuf **m0, struct inpcb } m = *m0; /* pf_normalize messes with m0 */ h = mtod(m, struct ip6_hdr *); + off = ((caddr_t)h - m->m_data) + sizeof(struct ip6_hdr); /* * we do not support jumbogram. if we keep going, zero ip6_plen @@ -8272,7 +8279,6 @@ pf_test6(int dir, int pflags, struct ifnet *ifp, struct mbuf **m0, struct inpcb pd.tos = IPV6_DSCP(h); pd.tot_len = ntohs(h->ip6_plen) + sizeof(struct ip6_hdr); - off = ((caddr_t)h - m->m_data) + sizeof(struct ip6_hdr); pd.proto = h->ip6_nxt; do { switch (pd.proto) {
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