Date: Mon, 25 Aug 2014 15:49:41 +0000 (UTC) From: Gleb Smirnoff <glebius@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r270576 - stable/10/sys/netpfil/pf Message-ID: <201408251549.s7PFnfv0070144@svn.freebsd.org>
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Author: glebius Date: Mon Aug 25 15:49:41 2014 New Revision: 270576 URL: http://svnweb.freebsd.org/changeset/base/270576 Log: Merge r270022 from head: pf_map_addr() can fail and in this case we should drop the packet, otherwise bad consequences including a routing loop can occur. Move pf_set_rt_ifp() earlier in state creation sequence and inline it, cutting some extra code. PR: 183997 Submitted by: Kajetan Staszkiewicz <vegeta tuxpowered.net> Sponsored by: InnoGames GmbH Modified: stable/10/sys/netpfil/pf/pf.c stable/10/sys/netpfil/pf/pf.h Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/netpfil/pf/pf.c ============================================================================== --- stable/10/sys/netpfil/pf/pf.c Mon Aug 25 15:48:28 2014 (r270575) +++ stable/10/sys/netpfil/pf/pf.c Mon Aug 25 15:49:41 2014 (r270576) @@ -265,8 +265,6 @@ static u_int16_t pf_get_mss(struct mbuf sa_family_t); static u_int16_t pf_calc_mss(struct pf_addr *, sa_family_t, int, u_int16_t); -static void pf_set_rt_ifp(struct pf_state *, - struct pf_addr *); static int pf_check_proto_cksum(struct mbuf *, int, int, u_int8_t, sa_family_t); static void pf_print_state_parts(struct pf_state *, @@ -2960,31 +2958,6 @@ pf_calc_mss(struct pf_addr *addr, sa_fam return (mss); } -static void -pf_set_rt_ifp(struct pf_state *s, struct pf_addr *saddr) -{ - struct pf_rule *r = s->rule.ptr; - struct pf_src_node *sn = NULL; - - s->rt_kif = NULL; - if (!r->rt || r->rt == PF_FASTROUTE) - return; - switch (s->key[PF_SK_WIRE]->af) { -#ifdef INET - case AF_INET: - pf_map_addr(AF_INET, r, saddr, &s->rt_addr, NULL, &sn); - s->rt_kif = r->rpool.cur->kif; - break; -#endif /* INET */ -#ifdef INET6 - case AF_INET6: - pf_map_addr(AF_INET6, r, saddr, &s->rt_addr, NULL, &sn); - s->rt_kif = r->rpool.cur->kif; - break; -#endif /* INET6 */ - } -} - static u_int32_t pf_tcp_iss(struct pf_pdesc *pd) { @@ -3547,6 +3520,19 @@ pf_create_state(struct pf_rule *r, struc s->timeout = PFTM_OTHER_FIRST_PACKET; } + if (r->rt && r->rt != PF_FASTROUTE) { + struct pf_src_node *sn = NULL; + + if (pf_map_addr(pd->af, r, pd->src, &s->rt_addr, NULL, &sn)) { + REASON_SET(&reason, PFRES_MAPFAILED); + pf_src_tree_remove_state(s); + STATE_DEC_COUNTERS(s); + uma_zfree(V_pf_state_z, s); + goto csfailed; + } + s->rt_kif = r->rpool.cur->kif; + } + s->creation = time_uptime; s->expire = time_uptime; @@ -3612,7 +3598,6 @@ pf_create_state(struct pf_rule *r, struc } else *sm = s; - pf_set_rt_ifp(s, pd->src); /* needs s->state_key set */ if (tag > 0) s->tag = tag; if (pd->proto == IPPROTO_TCP && (th->th_flags & (TH_SYN|TH_ACK)) == Modified: stable/10/sys/netpfil/pf/pf.h ============================================================================== --- stable/10/sys/netpfil/pf/pf.h Mon Aug 25 15:48:28 2014 (r270575) +++ stable/10/sys/netpfil/pf/pf.h Mon Aug 25 15:49:41 2014 (r270576) @@ -125,7 +125,8 @@ enum { PF_ADDR_ADDRMASK, PF_ADDR_NOROUTE #define PFRES_MAXSTATES 12 /* State limit */ #define PFRES_SRCLIMIT 13 /* Source node/conn limit */ #define PFRES_SYNPROXY 14 /* SYN proxy */ -#define PFRES_MAX 15 /* total+1 */ +#define PFRES_MAPFAILED 15 /* pf_map_addr() failed */ +#define PFRES_MAX 16 /* total+1 */ #define PFRES_NAMES { \ "match", \ @@ -143,6 +144,7 @@ enum { PF_ADDR_ADDRMASK, PF_ADDR_NOROUTE "state-limit", \ "src-limit", \ "synproxy", \ + "map-failed", \ NULL \ }
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