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.
                 */
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