Date: Thu, 12 Mar 2015 14:55:34 +0000 (UTC) From: "Andrey V. Elsukov" <ae@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r279920 - head/sys/net Message-ID: <201503121455.t2CEtYu1041322@svn.freebsd.org>
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Author: ae Date: Thu Mar 12 14:55:33 2015 New Revision: 279920 URL: https://svnweb.freebsd.org/changeset/base/279920 Log: Add if_input_default() method, that will be used for if_input initialization, when no input method specified before if_attach(). This prevents panics when if_input() method called directly e.g. from bpf(4) code. PR: 192426 Reviewed by: glebius MFC after: 1 week Modified: head/sys/net/if.c Modified: head/sys/net/if.c ============================================================================== --- head/sys/net/if.c Thu Mar 12 14:18:36 2015 (r279919) +++ head/sys/net/if.c Thu Mar 12 14:55:33 2015 (r279920) @@ -160,6 +160,7 @@ static void if_attachdomain1(struct ifne static int ifconf(u_long, caddr_t); static void if_freemulti(struct ifmultiaddr *); static void if_grow(void); +static void if_input_default(struct ifnet *, struct mbuf *); static void if_route(struct ifnet *, int flag, int fam); static int if_setflag(struct ifnet *, int, int, int *, int); static int if_transmit(struct ifnet *ifp, struct mbuf *m); @@ -665,6 +666,8 @@ if_attach_internal(struct ifnet *ifp, in ifp->if_transmit = if_transmit; ifp->if_qflush = if_qflush; } + if (ifp->if_input == NULL) + ifp->if_input = if_input_default; if (!vmove) { #ifdef MAC @@ -3516,6 +3519,13 @@ if_transmit(struct ifnet *ifp, struct mb return (error); } +static void +if_input_default(struct ifnet *ifp __unused, struct mbuf *m) +{ + + m_freem(m); +} + int if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust) {
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