[src/trunk]: src/sys/fs/tmpfs fix buffer overrun for symbolic links. PR/31325.

[yamt <yamt%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/3073ae61a338
branches:  trunk
changeset: 584433:3073ae61a338
user:      yamt <yamt%NetBSD.org@localhost>
date:      Sat Sep 17 10:28:26 2005 +0000

description:
fix buffer overrun for symbolic links.  PR/31325.

diffstat:

 sys/fs/tmpfs/tmpfs_subr.c |  12 ++++++------
 1 files changed, 6 insertions(+), 6 deletions(-)

diffs (46 lines):

diff -r 6ece6c8c1a30 -r 3073ae61a338 sys/fs/tmpfs/tmpfs_subr.c
--- a/sys/fs/tmpfs/tmpfs_subr.c Sat Sep 17 09:44:05 2005 +0000
+++ b/sys/fs/tmpfs/tmpfs_subr.c Sat Sep 17 10:28:26 2005 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: tmpfs_subr.c,v 1.6 2005/09/16 00:18:48 yamt Exp $      */
+/*     $NetBSD: tmpfs_subr.c,v 1.7 2005/09/17 10:28:26 yamt Exp $      */
 
 /*
  * Copyright (c) 2005 The NetBSD Foundation, Inc.
@@ -41,7 +41,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: tmpfs_subr.c,v 1.6 2005/09/16 00:18:48 yamt Exp $");
+__KERNEL_RCSID(0, "$NetBSD: tmpfs_subr.c,v 1.7 2005/09/17 10:28:26 yamt Exp $");
 
 #include <sys/param.h>
 #include <sys/dirent.h>
@@ -138,15 +138,15 @@
 
        case VLNK:
                KASSERT(strlen(target) < MAXPATHLEN);
+               nnode->tn_size = strlen(target);
                nnode->tn_link = tmpfs_str_pool_get(&tmp->tm_str_pool,
-                   strlen(target), 0);
+                   nnode->tn_size, 0);
                if (nnode->tn_link == NULL) {
                        nnode->tn_type = VNON;
                        tmpfs_free_node(tmp, nnode);
                        return ENOSPC;
                }
-               strcpy(nnode->tn_link, target);
-               nnode->tn_size = strlen(target);
+               memcpy(nnode->tn_link, target, nnode->tn_size);
                break;
 
        case VREG:
@@ -191,7 +191,7 @@
 
        case VLNK:
                tmpfs_str_pool_put(&tmp->tm_str_pool, node->tn_link,
-                   strlen(node->tn_link));
+                   node->tn_size);
                pages = 0;
                break;