Date: Wed, 25 Mar 2015 22:45:55 +0000 (UTC) From: Michael Tuexen <tuexen@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r280642 - head/sys/netinet Message-ID: <201503252245.t2PMjtgc052491@svn.freebsd.org>
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Author: tuexen Date: Wed Mar 25 22:45:54 2015 New Revision: 280642 URL: https://svnweb.freebsd.org/changeset/base/280642 Log: Make sure that we don't free an SCTP shared key too early. Thanks to Pouyan Sepehrdad from Qualcomm Product Security Initiative for reporting the issue. MFC after: 3 days Modified: head/sys/netinet/sctp_auth.c Modified: head/sys/netinet/sctp_auth.c ============================================================================== --- head/sys/netinet/sctp_auth.c Wed Mar 25 22:35:08 2015 (r280641) +++ head/sys/netinet/sctp_auth.c Wed Mar 25 22:45:54 2015 (r280642) @@ -576,13 +576,12 @@ sctp_auth_key_release(struct sctp_tcb *s /* decrement the ref count */ if (skey) { - sctp_free_sharedkey(skey); SCTPDBG(SCTP_DEBUG_AUTH2, "%s: stcb %p key %u refcount release to %d\n", __FUNCTION__, (void *)stcb, key_id, skey->refcount); /* see if a notification should be generated */ - if ((skey->refcount <= 1) && (skey->deactivated)) { + if ((skey->refcount <= 2) && (skey->deactivated)) { /* notify ULP that key is no longer used */ sctp_ulp_notify(SCTP_NOTIFY_AUTH_FREE_KEY, stcb, key_id, 0, so_locked); @@ -590,6 +589,7 @@ sctp_auth_key_release(struct sctp_tcb *s "%s: stcb %p key %u no longer used, %d\n", __FUNCTION__, (void *)stcb, key_id, skey->refcount); } + sctp_free_sharedkey(skey); } }
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