Date: Thu, 15 May 2014 20:21:19 +0000 (UTC) From: Michael Tuexen <tuexen@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org Subject: svn commit: r266190 - stable/9/sys/netinet Message-ID: <201405152021.s4FKLJ5c086878@svn.freebsd.org>
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Author: tuexen Date: Thu May 15 20:21:19 2014 New Revision: 266190 URL: http://svnweb.freebsd.org/changeset/base/266190 Log: MFC r264838: Don't free an mbuf twice. This only happens in very rare error cases where the peer sends illegal sequencing information in DATA chunks for an existing association. Modified: stable/9/sys/netinet/sctp_indata.c Directory Properties: stable/9/sys/ (props changed) Modified: stable/9/sys/netinet/sctp_indata.c ============================================================================== --- stable/9/sys/netinet/sctp_indata.c Thu May 15 20:19:33 2014 (r266189) +++ stable/9/sys/netinet/sctp_indata.c Thu May 15 20:21:19 2014 (r266190) @@ -1716,6 +1716,9 @@ failed_pdapi_express_del: stcb->sctp_ep->last_abort_code = SCTP_FROM_SCTP_INDATA + SCTP_LOC_15; sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, SCTP_SO_NOT_LOCKED); *abort_flag = 1; + if (last_chunk) { + *m = NULL; + } return (0); } else { if (sctp_does_tsn_belong_to_reasm(asoc, control->sinfo_tsn)) { @@ -1732,6 +1735,9 @@ failed_pdapi_express_del: stcb->sctp_ep->last_abort_code = SCTP_FROM_SCTP_INDATA + SCTP_LOC_16; sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, SCTP_SO_NOT_LOCKED); *abort_flag = 1; + if (last_chunk) { + *m = NULL; + } return (0); } } @@ -1758,6 +1764,9 @@ failed_pdapi_express_del: stcb->sctp_ep->last_abort_code = SCTP_FROM_SCTP_INDATA + SCTP_LOC_17; sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, SCTP_SO_NOT_LOCKED); *abort_flag = 1; + if (last_chunk) { + *m = NULL; + } return (0); } } @@ -1821,6 +1830,9 @@ failed_pdapi_express_del: } else { sctp_queue_data_to_stream(stcb, asoc, control, abort_flag); if (*abort_flag) { + if (last_chunk) { + *m = NULL; + } return (0); } } @@ -1833,7 +1845,9 @@ failed_pdapi_express_del: * the assoc is now gone and chk was put onto the * reasm queue, which has all been freed. */ - *m = NULL; + if (last_chunk) { + *m = NULL; + } return (0); } }
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