Date: Fri, 24 May 2019 08:40:37 +0000 (UTC) From: "Andrey V. Elsukov" <ae@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r348232 - stable/12/sys/netinet6 Message-ID: <201905240840.x4O8ebk4022176@repo.freebsd.org>
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Author: ae Date: Fri May 24 08:40:37 2019 New Revision: 348232 URL: https://svnweb.freebsd.org/changeset/base/348232 Log: MFC r347383: In mld_v2_cancel_link_timers() check number of references and disconnect inm before releasing the last reference. This fixes possible panics and assertion. PR: 237329 Reviewed by: mmacy Modified: stable/12/sys/netinet6/mld6.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/netinet6/mld6.c ============================================================================== --- stable/12/sys/netinet6/mld6.c Fri May 24 06:49:47 2019 (r348231) +++ stable/12/sys/netinet6/mld6.c Fri May 24 08:40:37 2019 (r348232) @@ -1704,6 +1704,8 @@ mld_v2_cancel_link_timers(struct mld_ifsoftc *mli) * version, we need to release the final * reference held for issuing the INCLUDE {}. */ + if (inm->in6m_refcount == 1) + in6m_disconnect_locked(&inmh, inm); in6m_rele_locked(&inmh, inm); /* FALLTHROUGH */ case MLD_G_QUERY_PENDING_MEMBER:
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