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If the user doesn't have read permission, union_copyup should not copy

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a file to upper layer.

Reviewed by:	Naofumi Honda <honda@Kururu.math.sci.hokudai.ac.jp>
This commit is contained in:
KATO Takenori 1997-08-14 03:57:46 +00:00
parent 3dc942bbe9
commit 5842d4e5b2
2 changed files with 22 additions and 2 deletions
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12
sys/fs/unionfs/union_subr.c
View File

@ -35,7 +35,7 @@
* SUCH DAMAGE.
*
* @(#)union_subr.c 8.20 (Berkeley) 5/20/95
* $Id: union_subr.c,v 1.18 1997/04/16 16:24:24 kato Exp $
* $Id: union_subr.c,v 1.19 1997/08/02 14:32:28 bde Exp $
*/
#include <sys/param.h>
@ -650,6 +650,16 @@ union_copyup(un, docopy, cred, p)
int error;
struct vnode *lvp, *uvp;
/*
* If the user does not have read permission, the vnode should not
* be copied to upper layer.
*/
vn_lock(un->un_lowervp, LK_EXCLUSIVE | LK_RETRY, p);
error = VOP_ACCESS(un->un_lowervp, VREAD, cred, p);
VOP_UNLOCK(un->un_lowervp, 0, p);
if (error)
return (error);
error = union_vn_create(&uvp, un, p);
if (error)
return (error);

12
sys/miscfs/union/union_subr.c
View File

@ -35,7 +35,7 @@
* SUCH DAMAGE.
*
* @(#)union_subr.c 8.20 (Berkeley) 5/20/95
* $Id: union_subr.c,v 1.18 1997/04/16 16:24:24 kato Exp $
* $Id: union_subr.c,v 1.19 1997/08/02 14:32:28 bde Exp $
*/
#include <sys/param.h>
@ -650,6 +650,16 @@ union_copyup(un, docopy, cred, p)
int error;
struct vnode *lvp, *uvp;
/*
* If the user does not have read permission, the vnode should not
* be copied to upper layer.
*/
vn_lock(un->un_lowervp, LK_EXCLUSIVE | LK_RETRY, p);
error = VOP_ACCESS(un->un_lowervp, VREAD, cred, p);
VOP_UNLOCK(un->un_lowervp, 0, p);
if (error)
return (error);
error = union_vn_create(&uvp, un, p);
if (error)
return (error);