Date: Tue, 4 Oct 2011 12:45:24 +0000 (UTC) From: "Bjoern A. Zeeb" <bz@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org Subject: svn commit: r225971 - stable/9/sys/netinet6 Message-ID: <201110041245.p94CjOZM057978@svn.freebsd.org>
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Author: bz Date: Tue Oct 4 12:45:24 2011 New Revision: 225971 URL: http://svn.freebsd.org/changeset/base/225971 Log: MFC r225885: Fix an obvious bug from r186196 shadowing a variable, not correctly appending the new mbuf to the chain reference but possibly causing an mbuf nextpkt loop leading to a memory used after handoff (or having been freed) and leaking an mbuf here. Reviewed by: rwatson, brooks Approved by: re (kib) Modified: stable/9/sys/netinet6/nd6.c Directory Properties: stable/9/sys/ (props changed) stable/9/sys/amd64/include/xen/ (props changed) stable/9/sys/boot/ (props changed) stable/9/sys/boot/i386/efi/ (props changed) stable/9/sys/boot/ia64/efi/ (props changed) stable/9/sys/boot/ia64/ski/ (props changed) stable/9/sys/boot/powerpc/boot1.chrp/ (props changed) stable/9/sys/boot/powerpc/ofw/ (props changed) stable/9/sys/cddl/contrib/opensolaris/ (props changed) stable/9/sys/conf/ (props changed) stable/9/sys/contrib/dev/acpica/ (props changed) stable/9/sys/contrib/octeon-sdk/ (props changed) stable/9/sys/contrib/pf/ (props changed) stable/9/sys/contrib/x86emu/ (props changed) Modified: stable/9/sys/netinet6/nd6.c ============================================================================== --- stable/9/sys/netinet6/nd6.c Tue Oct 4 11:35:18 2011 (r225970) +++ stable/9/sys/netinet6/nd6.c Tue Oct 4 12:45:24 2011 (r225971) @@ -2042,14 +2042,15 @@ nd6_output_lle(struct ifnet *ifp, struct if (*chain == NULL) *chain = m; else { - struct mbuf *m = *chain; + struct mbuf *mb; /* * append mbuf to end of deferred chain */ - while (m->m_nextpkt != NULL) - m = m->m_nextpkt; - m->m_nextpkt = m; + mb = *chain; + while (mb->m_nextpkt != NULL) + mb = mb->m_nextpkt; + mb->m_nextpkt = m; } return (error); }
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