[refpolicy] [PATCH v2 1/3] Create new xattrfs attribute and fs_getattr_all_xattr_fs() interface

[refpolicy] [PATCH v2 1/3] Create new xattrfs attribute and fs_getattr_all_xattr_fs() interface

[Laurent Bigonville]

From: Laurent Bigonville <bigon@bigon.be>

Create a new attribute and fs_getattr_all_xattr_fs() interface that will
be used for all the filesystems that support xattr
---
 policy/modules/kernel/filesystem.if | 58 +++++++++++++++++++++++++++++++++++++
 policy/modules/kernel/filesystem.te |  1 +
 2 files changed, 59 insertions(+)

diff --git a/policy/modules/kernel/filesystem.if b/policy/modules/kernel/filesystem.if
index 8416beb..d24ae64 100644
--- a/policy/modules/kernel/filesystem.if
+++ b/policy/modules/kernel/filesystem.if
@@ -108,6 +108,64 @@ interface(`fs_exec_noxattr',`
 
 ########################################
 ## <summary>
+##	Transform specified type into a filesystem
+##	type which has extended attribute
+##	support.
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+#
+interface(`fs_xattr_type',`
+	gen_require(`
+		attribute xattrfs;
+	')
+
+	fs_type($1)
+
+	typeattribute $1 xattrfs;
+')
+
+########################################
+## <summary>
+##	Get the attributes of all the
+##	filesystems which have extended
+##	attributes.
+##	This includes pseudo filesystems.
+## </summary>
+## <desc>
+##	<p>
+##	Allow the specified domain to
+##	get the attributes of a filesystems
+##	which have extended attributes.
+##	Example attributes:
+##	</p>
+##	<ul>
+##		<li>Type of the file system (e.g., tmpfs)</li>
+##		<li>Size of the file system</li>
+##		<li>Available space on the file system</li>
+##	</ul>
+## </desc>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+## <infoflow type="read" weight="5"/>
+## <rolecap/>
+#
+interface(`fs_getattr_all_xattr_fs',`
+	gen_require(`
+		attribute xattrfs;
+	')
+
+	allow $1 xattrfs:filesystem getattr;
+')
+
+########################################
+## <summary>
 ##	Mount a persistent filesystem which
 ##	has extended attributes, such as
 ##	ext3, JFS, or XFS.
diff --git a/policy/modules/kernel/filesystem.te b/policy/modules/kernel/filesystem.te
index d9cc21f..4207e8f 100644
--- a/policy/modules/kernel/filesystem.te
+++ b/policy/modules/kernel/filesystem.te
@@ -8,6 +8,7 @@ policy_module(filesystem, 1.18.0)
 attribute filesystem_type;
 attribute filesystem_unconfined_type;
 attribute noxattrfs;
+attribute xattrfs;
 
 ##############################
 #
-- 
1.9.1

[refpolicy] [PATCH v2 2/3] Associate the new xattrfs attribute to fs_t and some pseudo-fs

[Laurent Bigonville]

From: Laurent Bigonville <bigon@bigon.be>

Associate the new xattrfs attribute to fs_t and the pseudo filesystems
that we know support xattr

This patch adds the attribute to the following pseudo filesystems

 - device_t
 - devpts_t
 - hugetlbfs
 - sysfs_t
 - tmpfs_t
---
 policy/modules/kernel/devices.te    | 4 ++--
 policy/modules/kernel/filesystem.te | 5 +++--
 policy/modules/kernel/terminal.te   | 2 +-
 3 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/policy/modules/kernel/devices.te b/policy/modules/kernel/devices.te
index 520f4ee..e42c5ee 100644
--- a/policy/modules/kernel/devices.te
+++ b/policy/modules/kernel/devices.te
@@ -18,7 +18,7 @@ fs_associate_tmpfs(device_t)
 files_type(device_t)
 files_mountpoint(device_t)
 files_associate_tmp(device_t)
-fs_type(device_t)
+fs_xattr_type(device_t)
 fs_use_trans devtmpfs gen_context(system_u:object_r:device_t,s0);
 
 #
@@ -224,7 +224,7 @@ dev_node(sound_device_t)
 #
 type sysfs_t;
 files_mountpoint(sysfs_t)
-fs_type(sysfs_t)
+fs_xattr_type(sysfs_t)
 genfscon sysfs / gen_context(system_u:object_r:sysfs_t,s0)
 
 #
diff --git a/policy/modules/kernel/filesystem.te b/policy/modules/kernel/filesystem.te
index 4207e8f..a8a54d2 100644
--- a/policy/modules/kernel/filesystem.te
+++ b/policy/modules/kernel/filesystem.te
@@ -17,6 +17,7 @@ attribute xattrfs;
 #
 type fs_t;
 fs_type(fs_t)
+typeattribute fs_t xattrfs;
 sid fs gen_context(system_u:object_r:fs_t,s0)
 
 # Use xattrs for the following filesystem types.
@@ -95,7 +96,7 @@ fs_type(futexfs_t)
 genfscon futexfs / gen_context(system_u:object_r:futexfs_t,s0)
 
 type hugetlbfs_t;
-fs_type(hugetlbfs_t)
+fs_xattr_type(hugetlbfs_t)
 files_mountpoint(hugetlbfs_t)
 fs_use_trans hugetlbfs gen_context(system_u:object_r:hugetlbfs_t,s0);
 
@@ -175,7 +176,7 @@ genfscon vxfs / gen_context(system_u:object_r:vxfs_t,s0)
 #
 type tmpfs_t;
 dev_associate(tmpfs_t)
-fs_type(tmpfs_t)
+fs_xattr_type(tmpfs_t)
 files_type(tmpfs_t)
 files_mountpoint(tmpfs_t)
 files_poly_parent(tmpfs_t)
diff --git a/policy/modules/kernel/terminal.te b/policy/modules/kernel/terminal.te
index e05079a..01dbf46 100644
--- a/policy/modules/kernel/terminal.te
+++ b/policy/modules/kernel/terminal.te
@@ -27,7 +27,7 @@ dev_node(console_device_t)
 type devpts_t;
 files_mountpoint(devpts_t)
 fs_associate_tmpfs(devpts_t)
-fs_type(devpts_t)
+fs_xattr_type(devpts_t)
 fs_use_trans devpts gen_context(system_u:object_r:devpts_t,s0);
 
 #
-- 
1.9.1

[refpolicy] [PATCH v2 3/3] Use new fs_getattr_all_xattr_fs interface for setfiles_t and restorecond_t

[Laurent Bigonville]

From: Laurent Bigonville <bigon@bigon.be>

Use the new fs_getattr_all_xattr_fs() interface to allow setfiles_t and
restorecond_t domain to also get the attributes on pseudo-filesystems
that support xattr

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=740682
---
 policy/modules/system/selinuxutil.te | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/policy/modules/system/selinuxutil.te b/policy/modules/system/selinuxutil.te
index f4d17cd..c78dd63 100644
--- a/policy/modules/system/selinuxutil.te
+++ b/policy/modules/system/selinuxutil.te
@@ -330,7 +330,7 @@ kernel_read_system_state(restorecond_t)
 
 fs_relabelfrom_noxattr_fs(restorecond_t)
 fs_dontaudit_list_nfs(restorecond_t)
-fs_getattr_xattr_fs(restorecond_t)
+fs_getattr_all_xattr_fs(restorecond_t)
 fs_list_inotifyfs(restorecond_t)
 
 selinux_validate_context(restorecond_t)
@@ -558,7 +558,7 @@ files_relabel_all_files(setfiles_t)
 files_read_usr_symlinks(setfiles_t)
 files_dontaudit_read_all_symlinks(setfiles_t)
 
-fs_getattr_xattr_fs(setfiles_t)
+fs_getattr_all_xattr_fs(setfiles_t)
 fs_list_all(setfiles_t)
 fs_search_auto_mountpoints(setfiles_t)
 fs_relabelfrom_noxattr_fs(setfiles_t)
-- 
1.9.1

[refpolicy] [PATCH v2 2/3] Associate the new xattrfs attribute to fs_t and some pseudo-fs

[Laurent Bigonville]

Le Sat, 22 Mar 2014 13:06:10 +0100,
Laurent Bigonville <bigon@debian.org> a ?crit :

[...]
> b/policy/modules/kernel/filesystem.te index 4207e8f..a8a54d2 100644
> --- a/policy/modules/kernel/filesystem.te
> +++ b/policy/modules/kernel/filesystem.te
> @@ -17,6 +17,7 @@ attribute xattrfs;
>  #
>  type fs_t;
>  fs_type(fs_t)
> +typeattribute fs_t xattrfs;
>  sid fs gen_context(system_u:object_r:fs_t,s0)
>  
>  # Use xattrs for the following filesystem types.

This should probably be changed to use the new fs_xattr_type() of
course, or set the attribute directly as it's local.

[...]

I can post a v3 of the patch if you want

[refpolicy] [PATCH v2 2/3] Associate the new xattrfs attribute to fs_t and some pseudo-fs

[Christopher J. PeBenito]

On 03/24/2014 09:47 AM, Laurent Bigonville wrote:
> Le Sat, 22 Mar 2014 13:06:10 +0100,
> Laurent Bigonville <bigon@debian.org> a ?crit :
> 
> [...]
>> b/policy/modules/kernel/filesystem.te index 4207e8f..a8a54d2 100644
>> --- a/policy/modules/kernel/filesystem.te
>> +++ b/policy/modules/kernel/filesystem.te
>> @@ -17,6 +17,7 @@ attribute xattrfs;
>>  #
>>  type fs_t;
>>  fs_type(fs_t)
>> +typeattribute fs_t xattrfs;
>>  sid fs gen_context(system_u:object_r:fs_t,s0)
>>  
>>  # Use xattrs for the following filesystem types.
> 
> This should probably be changed to use the new fs_xattr_type() of
> course, or set the attribute directly as it's local.
> 
> [...]
> 
> I can post a v3 of the patch if you want

I'd prefer to keep consistent and use a fs_xattr_type() call.


-- 
Chris PeBenito
Tresys Technology, LLC
www.tresys.com | oss.tresys.com