From owner-svn-src-all@FreeBSD.ORG  Fri Jun 17 07:30:56 2011
Return-Path: <owner-svn-src-all@FreeBSD.ORG>
Delivered-To: svn-src-all@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id B5CC31065673;
	Fri, 17 Jun 2011 07:30:56 +0000 (UTC)
	(envelope-from pluknet@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c])
	by mx1.freebsd.org (Postfix) with ESMTP id A59138FC14;
	Fri, 17 Jun 2011 07:30:56 +0000 (UTC)
Received: from svn.freebsd.org (localhost [127.0.0.1])
	by svn.freebsd.org (8.14.4/8.14.4) with ESMTP id p5H7UupK070718;
	Fri, 17 Jun 2011 07:30:56 GMT (envelope-from pluknet@svn.freebsd.org)
Received: (from pluknet@localhost)
	by svn.freebsd.org (8.14.4/8.14.4/Submit) id p5H7Uux5070716;
	Fri, 17 Jun 2011 07:30:56 GMT (envelope-from pluknet@svn.freebsd.org)
Message-Id: <201106170730.p5H7Uux5070716@svn.freebsd.org>
From: Sergey Kandaurov <pluknet@FreeBSD.org>
Date: Fri, 17 Jun 2011 07:30:56 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
	svn-src-head@freebsd.org
X-SVN-Group: head
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Cc: 
Subject: svn commit: r223182 - head/sys/compat/linprocfs
X-BeenThere: svn-src-all@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: "SVN commit messages for the entire src tree \(except for &quot;
	user&quot; and &quot; projects&quot; \)" <svn-src-all.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
	<mailto:svn-src-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-all>
List-Post: <mailto:svn-src-all@freebsd.org>
List-Help: <mailto:svn-src-all-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
	<mailto:svn-src-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 17 Jun 2011 07:30:56 -0000

Author: pluknet
Date: Fri Jun 17 07:30:56 2011
New Revision: 223182
URL: http://svn.freebsd.org/changeset/base/223182

Log:
  Return empty cmdline/environ string for processes with kernel address
  space. This is consistent with the behavior in linux.
  
  PR:		kern/157871
  Reported by:	Petr Salinger <Petr Salinger att seznam cz>
  Verified on:	GNU/kFreeBSD debian 8.2-1-amd64 (by reporter)
  Reviewed by:	kib (some time ago)
  MFC after:	2 weeks

Modified:
  head/sys/compat/linprocfs/linprocfs.c

Modified: head/sys/compat/linprocfs/linprocfs.c
==============================================================================
--- head/sys/compat/linprocfs/linprocfs.c	Fri Jun 17 07:07:26 2011	(r223181)
+++ head/sys/compat/linprocfs/linprocfs.c	Fri Jun 17 07:30:56 2011	(r223182)
@@ -1049,6 +1049,15 @@ linprocfs_doproccmdline(PFS_FILL_ARGS)
 		PROC_UNLOCK(p);
 		return (ret);
 	}
+
+	/*
+	 * Mimic linux behavior and pass only processes with usermode
+	 * address space as valid.  Return zero silently otherwize.
+	 */
+	if (p->p_vmspace == &vmspace0) {
+		PROC_UNLOCK(p);
+		return (0);
+	}
 	if (p->p_args != NULL) {
 		sbuf_bcpy(sb, p->p_args->ar_args, p->p_args->ar_length);
 		PROC_UNLOCK(p);
@@ -1073,6 +1082,15 @@ linprocfs_doprocenviron(PFS_FILL_ARGS)
 		PROC_UNLOCK(p);
 		return (ret);
 	}
+
+	/*
+	 * Mimic linux behavior and pass only processes with usermode
+	 * address space as valid.  Return zero silently otherwize.
+	 */
+	if (p->p_vmspace == &vmspace0) {
+		PROC_UNLOCK(p);
+		return (0);
+	}
 	PROC_UNLOCK(p);
 
 	ret = linprocfs_doargv(td, p, sb, ps_string_env);