Date: Wed, 19 May 2021 13:35:24 GMT From: Mark Johnston <markj@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 010f19777085 - stable/13 - nd6: Avoid using an uninitialized sockaddr in nd6_prefix_offlink() Message-ID: <202105191335.14JDZO2w074658@gitrepo.freebsd.org>
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The branch stable/13 has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=010f19777085561cae108e5fd228ff258f7d102a commit 010f19777085561cae108e5fd228ff258f7d102a Author: Mark Johnston <markj@FreeBSD.org> AuthorDate: 2021-05-12 15:49:24 +0000 Commit: Mark Johnston <markj@FreeBSD.org> CommitDate: 2021-05-19 13:32:28 +0000 nd6: Avoid using an uninitialized sockaddr in nd6_prefix_offlink() Commit 81728a538 ("Split rtinit() into multiple functions.") removed the initialization of sa6, but not one of its uses. This meant that we were passing an uninitialized sockaddr as the address to lltable_prefix_free(). Remove the variable outright to fix the problem. The caller is expected to hold a reference on pr. Fixes: 81728a538 ("Split rtinit() into multiple functions.") Reported by: KMSAN Reviewed by: donner Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D30166 (cherry picked from commit c1dd4d642fa0e2c8ea4f9a879f2cc4e5d6c39211) --- sys/netinet6/nd6_rtr.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/sys/netinet6/nd6_rtr.c b/sys/netinet6/nd6_rtr.c index 2f721b4edcc3..2960b6cad951 100644 --- a/sys/netinet6/nd6_rtr.c +++ b/sys/netinet6/nd6_rtr.c @@ -2165,7 +2165,6 @@ nd6_prefix_offlink(struct nd_prefix *pr) int error = 0; struct ifnet *ifp = pr->ndpr_ifp; struct nd_prefix *opr; - struct sockaddr_in6 sa6; char ip6buf[INET6_ADDRSTRLEN]; uint64_t genid; int a_failure; @@ -2240,7 +2239,8 @@ restart: } if (a_failure) - lltable_prefix_free(AF_INET6, (struct sockaddr *)&sa6, + lltable_prefix_free(AF_INET6, + (struct sockaddr *)&pr->ndpr_prefix, (struct sockaddr *)&mask6, LLE_STATIC); return (error);
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