[SCM] Samba Shared Repository - branch v3-3-test updated -
release-3-2-0pre2-4901-gc5462c8
Jeremy Allison
jra at samba.org
Tue Feb 3 01:18:07 GMT 2009
The branch, v3-3-test has been updated
via c5462c8b43435763783185a03029903efe3b0c11 (commit)
from 64982295fccc5758aff4464b5527a27621386bc9 (commit)
http://gitweb.samba.org/?p=samba.git;a=shortlog;h=v3-3-test
- Log -----------------------------------------------------------------
commit c5462c8b43435763783185a03029903efe3b0c11
Author: Jeremy Allison <jra at samba.org>
Date: Mon Feb 2 17:11:15 2009 -0800
Fix bug #6082 - smbd_gpfs_getacl failed: Windows client can´t rename or delete file
This fixes the generic rename/delete problem for 3.3.0 and above.
Fixed slightly differently to discussions, user viewable modified
ACLs are not a good idea :-).
Jeremy.
-----------------------------------------------------------------------
Summary of changes:
source/include/smb.h | 2 +-
source/lib/util_seaccess.c | 5 +++-
source/smbd/file_access.c | 11 ++------
source/smbd/open.c | 56 ++++++++++++++++++++++++++++++++++++--------
4 files changed, 54 insertions(+), 20 deletions(-)
Changeset truncated at 500 lines:
diff --git a/source/include/smb.h b/source/include/smb.h
index e7f08a3..a98d151 100644
--- a/source/include/smb.h
+++ b/source/include/smb.h
@@ -1251,7 +1251,7 @@ struct bitmap {
/* Mapping of access rights to UNIX perms. for a UNIX directory. */
#define UNIX_DIRECTORY_ACCESS_RWX FILE_GENERIC_ALL
#define UNIX_DIRECTORY_ACCESS_R FILE_GENERIC_READ
-#define UNIX_DIRECTORY_ACCESS_W FILE_GENERIC_WRITE
+#define UNIX_DIRECTORY_ACCESS_W (FILE_GENERIC_WRITE|FILE_DELETE_CHILD)
#define UNIX_DIRECTORY_ACCESS_X FILE_GENERIC_EXECUTE
#if 0
diff --git a/source/lib/util_seaccess.c b/source/lib/util_seaccess.c
index fdc10f2..0da7442 100644
--- a/source/lib/util_seaccess.c
+++ b/source/lib/util_seaccess.c
@@ -149,7 +149,9 @@ static uint32_t access_check_max_allowed(const struct security_descriptor *sd,
}
/*
- the main entry point for access checking.
+ The main entry point for access checking. If returning ACCESS_DENIED
+ this function returns the denied bits in the uint32_t pointed
+ to by the access_granted pointer.
*/
NTSTATUS se_access_check(const struct security_descriptor *sd,
const NT_USER_TOKEN *token,
@@ -238,6 +240,7 @@ NTSTATUS se_access_check(const struct security_descriptor *sd,
done:
if (bits_remaining != 0) {
+ *access_granted = bits_remaining;
return NT_STATUS_ACCESS_DENIED;
}
diff --git a/source/smbd/file_access.c b/source/smbd/file_access.c
index c535bc7..743e079 100644
--- a/source/smbd/file_access.c
+++ b/source/smbd/file_access.c
@@ -116,16 +116,11 @@ bool can_delete_file_in_directory(connection_struct *conn, const char *fname)
* having the DELETE bit on the file itself and second if that does
* not help, by the DELETE_CHILD bit on the containing directory.
*
- * Here we check the other way round because with just posix
- * permissions looking at the file itself will never grant DELETE, so
- * by looking at the directory first we save one get_acl call.
+ * Here we only check the directory permissions, we will
+ * check the file DELETE permission separately.
*/
- if (can_access_file_acl(conn, dname, FILE_DELETE_CHILD)) {
- return true;
- }
-
- return can_access_file_acl(conn, fname, DELETE_ACCESS);
+ return can_access_file_acl(conn, dname, FILE_DELETE_CHILD);
}
/****************************************************************************
diff --git a/source/smbd/open.c b/source/smbd/open.c
index 3c07dba..7e127ea 100644
--- a/source/smbd/open.c
+++ b/source/smbd/open.c
@@ -50,13 +50,15 @@ NTSTATUS smb1_file_se_access_check(const struct security_descriptor *sd,
static NTSTATUS check_open_rights(struct connection_struct *conn,
const char *fname,
- uint32_t access_mask)
+ uint32_t access_mask,
+ uint32_t *access_granted)
{
/* Check if we have rights to open. */
NTSTATUS status;
- uint32_t access_granted = 0;
struct security_descriptor *sd;
+ *access_granted = 0;
+
status = SMB_VFS_GET_NT_ACL(conn, fname,
(OWNER_SECURITY_INFORMATION |
GROUP_SECURITY_INFORMATION |
@@ -73,9 +75,17 @@ static NTSTATUS check_open_rights(struct connection_struct *conn,
status = smb1_file_se_access_check(sd,
conn->server_info->ptok,
access_mask,
- &access_granted);
+ access_granted);
TALLOC_FREE(sd);
+
+ DEBUG(10,("check_open_rights: file %s requesting "
+ "0x%x returning 0x%x (%s)\n",
+ fname,
+ (unsigned int)access_mask,
+ (unsigned int)*access_granted,
+ nt_errstr(status) ));
+
return status;
}
@@ -398,14 +408,35 @@ static NTSTATUS open_file(files_struct *fsp,
} else {
fsp->fh->fd = -1; /* What we used to call a stat open. */
if (file_existed) {
+ uint32_t access_granted = 0;
+
status = check_open_rights(conn,
path,
- access_mask);
+ access_mask,
+ &access_granted);
if (!NT_STATUS_IS_OK(status)) {
- DEBUG(10, ("open_file: Access denied on "
- "file %s\n",
- path));
- return status;
+
+ /* Were we trying to do a stat open
+ * for delete and didn't get DELETE
+ * access (only) ? Check if the
+ * directory allows DELETE_CHILD.
+ * See here:
+ * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
+ * for details. */
+
+ if (!(NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) &&
+ (access_mask & DELETE_ACCESS) &&
+ (access_granted == DELETE_ACCESS) &&
+ can_delete_file_in_directory(conn, path))) {
+ DEBUG(10, ("open_file: Access denied on "
+ "file %s\n",
+ path));
+ return status;
+ }
+
+ DEBUG(10,("open_file: overrode ACCESS_DENIED "
+ "on file %s\n",
+ path ));
}
}
}
@@ -2398,9 +2429,11 @@ NTSTATUS open_directory(connection_struct *conn,
}
if (info == FILE_WAS_OPENED) {
+ uint32_t access_granted = 0;
status = check_open_rights(conn,
fname,
- access_mask);
+ access_mask,
+ &access_granted);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("open_directory: check_open_rights on "
"file %s failed with %s\n",
@@ -2819,8 +2852,11 @@ NTSTATUS create_file_unixpath(connection_struct *conn,
&& (create_disposition != FILE_CREATE)
&& (share_access & FILE_SHARE_DELETE)
&& (access_mask & DELETE_ACCESS)
- && (!can_delete_file_in_directory(conn, fname))) {
+ && (!(can_delete_file_in_directory(conn, fname) ||
+ can_access_file_acl(conn, fname, DELETE_ACCESS)))) {
status = NT_STATUS_ACCESS_DENIED;
+ DEBUG(10,("create_file_unixpath: open file %s "
+ "for delete ACCESS_DENIED\n", fname ));
goto fail;
}
--
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