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From: Andriy Gapon <avg@FreeBSD.org>
Date: Thu, 3 May 2018 07:28:04 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r333197 - stable/11/usr.sbin/mountd
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Author: avg
Date: Thu May  3 07:28:04 2018
New Revision: 333197
URL: https://svnweb.freebsd.org/changeset/base/333197

Log:
  MFC r332559: mountd: fix a crash when getgrouplist reports too many groups
  
  Sponsored by:	Panzura

Modified:
  stable/11/usr.sbin/mountd/mountd.c
Directory Properties:
  stable/11/   (props changed)

Modified: stable/11/usr.sbin/mountd/mountd.c
==============================================================================
--- stable/11/usr.sbin/mountd/mountd.c	Thu May  3 07:22:24 2018	(r333196)
+++ stable/11/usr.sbin/mountd/mountd.c	Thu May  3 07:28:04 2018	(r333197)
@@ -2913,8 +2913,11 @@ parsecred(char *namelist, struct xucred *cr)
 		}
 		cr->cr_uid = pw->pw_uid;
 		ngroups = XU_NGROUPS + 1;
-		if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups))
+		if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups)) {
 			syslog(LOG_ERR, "too many groups");
+			ngroups = XU_NGROUPS + 1;
+		}
+
 		/*
 		 * Compress out duplicate.
 		 */