svn commit: r350248 - head/sys/netinet

[Michael Tuexen]

Author: tuexen
Date: Tue Jul 23 18:07:36 2019
New Revision: 350248
URL: https://svnweb.freebsd.org/changeset/base/350248

Log:
  Fix a LOR in SCTP which was found by running syzkaller.
  
  Submitted by:		rrs@
  Reported by:		markj@
  MFC after:		1 week

Modified:
  head/sys/netinet/sctp_usrreq.c

Modified: head/sys/netinet/sctp_usrreq.c
==============================================================================
--- head/sys/netinet/sctp_usrreq.c	Tue Jul 23 17:48:37 2019	(r350247)
+++ head/sys/netinet/sctp_usrreq.c	Tue Jul 23 18:07:36 2019	(r350248)
@@ -965,9 +965,9 @@ sctp_shutdown(struct socket *so)
 		abort_anyway:
 				op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
 				stcb->sctp_ep->last_abort_code = SCTP_FROM_SCTP_USRREQ + SCTP_LOC_6;
+				SCTP_INP_RUNLOCK(inp);
 				sctp_abort_an_association(stcb->sctp_ep, stcb,
 				    op_err, SCTP_SO_LOCKED);
-				SCTP_INP_RUNLOCK(inp);
 				return (0);
 			}
 		}