Date: Thu, 9 May 2019 07:57:33 +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: r347383 - head/sys/netinet6 Message-ID: <201905090757.x497vXBO030654@repo.freebsd.org>
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Author: ae Date: Thu May 9 07:57:33 2019 New Revision: 347383 URL: https://svnweb.freebsd.org/changeset/base/347383 Log: 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 MFC after: 2 weeks Modified: head/sys/netinet6/mld6.c Modified: head/sys/netinet6/mld6.c ============================================================================== --- head/sys/netinet6/mld6.c Thu May 9 07:34:15 2019 (r347382) +++ head/sys/netinet6/mld6.c Thu May 9 07:57:33 2019 (r347383) @@ -1708,6 +1708,8 @@ 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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