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Fri, 19 Apr 2019 17:28:28 GMT (envelope-from tuexen@FreeBSD.org) Message-Id: <201904191728.x3JHSSR4030566@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: tuexen set sender to tuexen@FreeBSD.org using -f From: Michael Tuexen To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r346402 - head/sys/netinet6 X-SVN-Group: head X-SVN-Commit-Author: tuexen X-SVN-Commit-Paths: head/sys/netinet6 X-SVN-Commit-Revision: 346402 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk X-Loop: FreeBSD.org Sender: owner-src-committers@freebsd.org X-Rspamd-Queue-Id: 2862789103 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.95 / 15.00]; local_wl_from(0.00)[freebsd.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.999,0]; NEURAL_HAM_SHORT(-0.95)[-0.949,0]; ASN(0.00)[asn:11403, ipnet:96.47.64.0/20, country:US]; NEURAL_HAM_LONG(-1.00)[-1.000,0] Status: O X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.29 List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Date: Tue, 03 Sep 2019 14:07:30 -0000 X-Original-Date: Fri, 19 Apr 2019 17:28:28 +0000 (UTC) X-List-Received-Date: Tue, 03 Sep 2019 14:07:30 -0000 Author: tuexen Date: Fri Apr 19 17:28:28 2019 New Revision: 346402 URL: https://svnweb.freebsd.org/changeset/base/346402 Log: When a checksum has to be computed for a received IPv6 packet because it is requested by the application using the IPPROTO_IPV6 level socket option IPV6_CHECKSUM on a raw socket, ensure that the packet contains enough bytes to contain the checksum at the specified offset. Reported by: syzbot+6295fcc5a8aced81d599@syzkaller.appspotmail.com Reviewed by: bz@ Sponsored by: Netflix, Inc. Differential Revision: https://reviews.freebsd.org/D19968 Modified: head/sys/netinet6/raw_ip6.c Modified: head/sys/netinet6/raw_ip6.c ============================================================================== --- head/sys/netinet6/raw_ip6.c Fri Apr 19 17:21:35 2019 (r346401) +++ head/sys/netinet6/raw_ip6.c Fri Apr 19 17:28:28 2019 (r346402) @@ -239,7 +239,8 @@ rip6_input(struct mbuf **mp, int *offp, int proto) } if (in6p->in6p_cksum != -1) { RIP6STAT_INC(rip6s_isum); - if (in6_cksum(m, proto, *offp, + if (m->m_pkthdr.len - (*offp + in6p->in6p_cksum) < 2 || + in6_cksum(m, proto, *offp, m->m_pkthdr.len - *offp)) { RIP6STAT_INC(rip6s_badsum); goto skip_2;