svn commit: r244204 - stable/9/sys/kern

[Baptiste Daroussin]

Author: bapt
Date: Fri Dec 14 08:52:08 2012
New Revision: 244204
URL: http://svnweb.freebsd.org/changeset/base/244204

Log:
  MFC r243021:
  return ERANGE if the buffer is too small to contain the login as documented in
  the manpage
  
  Reviewed by:	cognet, kib

Modified:
  stable/9/sys/kern/kern_prot.c
Directory Properties:
  stable/9/sys/   (props changed)

Modified: stable/9/sys/kern/kern_prot.c
==============================================================================
--- stable/9/sys/kern/kern_prot.c	Fri Dec 14 08:07:37 2012	(r244203)
+++ stable/9/sys/kern/kern_prot.c	Fri Dec 14 08:52:08 2012	(r244204)
@@ -2084,6 +2084,8 @@ sys_getlogin(struct thread *td, struct g
 	bcopy(p->p_session->s_login, login, uap->namelen);
 	SESS_UNLOCK(p->p_session);
 	PROC_UNLOCK(p);
+	if (strlen(login) + 1 > uap->namelen)
+		return (ERANGE);
 	error = copyout(login, uap->namebuf, uap->namelen);
 	return (error);
 }