From d5c148af810209896971cbd02996cd2850917e4b Mon Sep 17 00:00:00 2001
From: yamt <yamt@NetBSD.org>
Date: Thu, 21 Jul 2005 10:39:46 +0000
Subject: [PATCH] use a correct credential for readlink.  discussed on
 source-changes@.

---
 sys/nfs/nfs_bio.c   |  6 +++---
 sys/nfs/nfs_vnops.c | 12 ++++++++++--
 2 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/sys/nfs/nfs_bio.c b/sys/nfs/nfs_bio.c
index 24fd44eccd6d..786732390e33 100644
--- a/sys/nfs/nfs_bio.c
+++ b/sys/nfs/nfs_bio.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: nfs_bio.c,v 1.131 2005/07/21 10:37:36 yamt Exp $	*/
+/*	$NetBSD: nfs_bio.c,v 1.132 2005/07/21 10:39:46 yamt Exp $	*/
 
 /*
  * Copyright (c) 1989, 1993
@@ -35,7 +35,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: nfs_bio.c,v 1.131 2005/07/21 10:37:36 yamt Exp $");
+__KERNEL_RCSID(0, "$NetBSD: nfs_bio.c,v 1.132 2005/07/21 10:39:46 yamt Exp $");
 
 #include "opt_nfs.h"
 #include "opt_ddb.h"
@@ -962,7 +962,7 @@ nfs_doio_read(bp, uiop)
 	case VLNK:
 		KASSERT(uiop->uio_offset == (off_t)0);
 		nfsstats.readlink_bios++;
-		error = nfs_readlinkrpc(vp, uiop, curproc->p_ucred);
+		error = nfs_readlinkrpc(vp, uiop, np->n_rcred);
 		break;
 	case VDIR:
 		nfsstats.readdir_bios++;
diff --git a/sys/nfs/nfs_vnops.c b/sys/nfs/nfs_vnops.c
index bb3fbde45a42..d1c742c713e2 100644
--- a/sys/nfs/nfs_vnops.c
+++ b/sys/nfs/nfs_vnops.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: nfs_vnops.c,v 1.223 2005/07/07 02:05:03 christos Exp $	*/
+/*	$NetBSD: nfs_vnops.c,v 1.224 2005/07/21 10:39:46 yamt Exp $	*/
 
 /*
  * Copyright (c) 1989, 1993
@@ -39,7 +39,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: nfs_vnops.c,v 1.223 2005/07/07 02:05:03 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: nfs_vnops.c,v 1.224 2005/07/21 10:39:46 yamt Exp $");
 
 #include "opt_inet.h"
 #include "opt_nfs.h"
@@ -1165,9 +1165,17 @@ nfs_readlink(v)
 		struct ucred *a_cred;
 	} */ *ap = v;
 	struct vnode *vp = ap->a_vp;
+	struct nfsnode *np = VTONFS(vp);
 
 	if (vp->v_type != VLNK)
 		return (EPERM);
+
+	if (np->n_rcred != NULL) {
+		crfree(np->n_rcred);
+	}
+	np->n_rcred = ap->a_cred;
+	crhold(np->n_rcred);
+
 	return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0));
 }