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From: Dmitry Chagin <dchagin@FreeBSD.org>
Date: Sat, 18 Mar 2017 18:31:04 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r315503 - head/sys/compat/linux
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Author: dchagin
Date: Sat Mar 18 18:31:04 2017
New Revision: 315503
URL: https://svnweb.freebsd.org/changeset/base/315503

Log:
  As noted by Roel Bouwman Linux allows a large buffer size than the
  struct ucred size. Fix this.
  
  PR:		102956
  Reported by:	Roel Bouwman <roel at qsp nl>
  MFC after:	1 week

Modified:
  head/sys/compat/linux/linux_socket.c

Modified: head/sys/compat/linux/linux_socket.c
==============================================================================
--- head/sys/compat/linux/linux_socket.c	Sat Mar 18 18:26:56 2017	(r315502)
+++ head/sys/compat/linux/linux_socket.c	Sat Mar 18 18:31:04 2017	(r315503)
@@ -1619,7 +1619,7 @@ linux_getsockopt(struct thread *td, stru
 			    sizeof(linux_tv)));
 			/* NOTREACHED */
 		case LOCAL_PEERCRED:
-			if (args->optlen != sizeof(lxu))
+			if (args->optlen < sizeof(lxu))
 				return (EINVAL);
 			xulen = sizeof(xu);
 			error = kern_getsockopt(td, args->s, bsd_args.level,