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From:   Jason Zaman <jason@perfinion.com>
To:     selinux-refpolicy@vger.kernel.org
Cc:     Jason Zaman <perfinion@gentoo.org>,
        Jason Zaman <jason@perfinion.com>
Subject: [PATCH 1/8] userdomain: Add watch on home dirs
Date:   Mon, 16 Nov 2020 19:46:21 -0800
Message-Id: <20201117034628.2461-1-jason@perfinion.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

From: Jason Zaman <perfinion@gentoo.org>

avc:  denied  { watch } for  pid=12351 comm="gmain" path="/usr/share/backgrounds/xfce" dev="zfs" ino=366749 scontext=staff_u:staff_r:staff_t:s0-s0:c0.c1023 tcontext=system_u:object_r:usr_t:s0 tclass=dir permissive=0
avc:  denied  { watch } for  pid=11646 comm="gmain" path="/etc/fonts" dev="zfs" ino=237700 scontext=staff_u:staff_r:staff_t:s0-s0:c0.c1023 tcontext=system_u:object_r:fonts_t:s0 tclass=dir permissive=0
avc:  denied  { watch } for  pid=12351 comm="gmain" path="/home/jason/Desktop" dev="zfs" ino=33153 scontext=staff_u:staff_r:staff_t:s0-s0:c0.c1023 tcontext=staff_u:object_r:user_home_t:s0 tclass=dir permissive=0
avc:  denied  { watch } for  pid=12574 comm="gmain" path="/home/jason/.local/share/icc" dev="zfs" ino=1954514 scontext=staff_u:staff_r:staff_t:s0-s0:c0.c1023 tcontext=staff_u:object_r:xdg_data_t:s0 tclass=dir permissive=0
avc:  denied  { watch } for  pid=11795 comm="gmain" path="/home/jason/.config/xfce4/panel/launcher-19" dev="zfs" ino=35464 scontext=staff_u:staff_r:staff_t:s0-s0:c0.c1023 tcontext=staff_u:object_r:xdg_config_t:s0 tclass=dir permissive=0
avc:  denied  { watch } for  pid=12351 comm="gmain" path="/home/jason/downloads/pics" dev="zfs" ino=38173 scontext=staff_u:staff_r:staff_t:s0-s0:c0.c1023 tcontext=staff_u:object_r:xdg_downloads_t:s0 tclass=dir permissive=0
Signed-off-by: Jason Zaman <perfinion@gentoo.org>
Signed-off-by: Jason Zaman <jason@perfinion.com>
---
 policy/modules/services/xserver.if  |  11 +-
 policy/modules/system/miscfiles.if  |  18 +++
 policy/modules/system/userdomain.if |  15 ++-
 policy/modules/system/xdg.if        | 198 ++++++++++++++++++++++++++++
 4 files changed, 240 insertions(+), 2 deletions(-)

diff --git a/policy/modules/services/xserver.if b/policy/modules/services/xserver.if
index baa39ef87..d5d6c7914 100644
--- a/policy/modules/services/xserver.if
+++ b/policy/modules/services/xserver.if
@@ -95,6 +95,7 @@ interface(`xserver_restricted_role',`
 	dev_rw_usbfs($2)
 
 	miscfiles_read_fonts($2)
+	miscfiles_watch_fonts_dirs($2)
 
 	xserver_common_x_domain_template(user, $2)  #selint-disable:S-004
 	xserver_domtrans($2)
@@ -186,10 +187,13 @@ interface(`xserver_role',`
 	optional_policy(`
 		xdg_manage_all_cache($2)
 		xdg_relabel_all_cache($2)
+		xdg_watch_all_cache_dirs($2)
 		xdg_manage_all_config($2)
 		xdg_relabel_all_config($2)
+		xdg_watch_all_config_dirs($2)
 		xdg_manage_all_data($2)
 		xdg_relabel_all_data($2)
+		xdg_watch_all_data_dirs($2)
 
 		xdg_generic_user_home_dir_filetrans_cache($2, dir, ".cache")
 		xdg_generic_user_home_dir_filetrans_config($2, dir, ".config")
@@ -203,14 +207,19 @@ interface(`xserver_role',`
 
 		xdg_manage_documents($2)
 		xdg_relabel_documents($2)
+		xdg_watch_documents_dirs($2)
 		xdg_manage_downloads($2)
 		xdg_relabel_downloads($2)
+		xdg_watch_downloads_dirs($2)
 		xdg_manage_music($2)
 		xdg_relabel_music($2)
+		xdg_watch_music_dirs($2)
 		xdg_manage_pictures($2)
 		xdg_relabel_pictures($2)
+		xdg_watch_pictures_dirs($2)
 		xdg_manage_videos($2)
 		xdg_relabel_videos($2)
+		xdg_watch_videos_dirs($2)
 
 		xdg_cache_filetrans($2, mesa_shader_cache_t, dir, "mesa_shader_cache")
 	')
@@ -508,7 +517,7 @@ interface(`xserver_use_user_fonts',`
 	')
 
 	# Read per user fonts
-	allow $1 user_fonts_t:dir list_dir_perms;
+	allow $1 user_fonts_t:dir { list_dir_perms watch };
 	allow $1 user_fonts_t:file { map read_file_perms };
 
 	# Manipulate the global font cache
diff --git a/policy/modules/system/miscfiles.if b/policy/modules/system/miscfiles.if
index e633217fe..354fe6fb3 100644
--- a/policy/modules/system/miscfiles.if
+++ b/policy/modules/system/miscfiles.if
@@ -824,6 +824,24 @@ interface(`miscfiles_manage_public_files',`
 	manage_lnk_files_pattern($1, public_content_rw_t, public_content_rw_t)
 ')
 
+########################################
+## <summary>
+##	Watch public files
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+#
+interface(`miscfiles_watch_public_dirs',`
+	gen_require(`
+		type public_content_rw_t;
+	')
+
+	allow $1 public_content_rw_t:dir watch;
+')
+
 ########################################
 ## <summary>
 ##	Read TeX data
diff --git a/policy/modules/system/userdomain.if b/policy/modules/system/userdomain.if
index 02ead5b2a..482af588b 100644
--- a/policy/modules/system/userdomain.if
+++ b/policy/modules/system/userdomain.if
@@ -289,6 +289,12 @@ interface(`userdom_ro_home_role',`
 	read_sock_files_pattern($2, { user_home_t user_home_dir_t }, user_home_t)
 	files_list_home($2)
 
+	allow $2 { user_home_t user_home_dir_t }:dir { watch watch_mount watch_sb watch_with_perm watch_reads };
+	allow $2 user_home_t:file { watch watch_mount watch_sb watch_with_perm watch_reads };
+	allow $2 user_home_t:lnk_file { watch watch_mount watch_sb watch_with_perm watch_reads };
+	allow $2 user_home_t:sock_file { watch watch_mount watch_sb watch_with_perm watch_reads };
+	allow $2 user_home_t:fifo_file { watch watch_mount watch_sb watch_with_perm watch_reads };
+
 	tunable_policy(`use_nfs_home_dirs',`
 		fs_list_nfs($2)
 		fs_read_nfs_files($2)
@@ -368,7 +374,11 @@ interface(`userdom_manage_home_role',`
 	# cjp: this should probably be removed:
 	allow $2 user_home_dir_t:dir { manage_dir_perms relabel_dir_perms };
 
-	allow $2 user_home_dir_t:dir watch;
+	allow $2 { user_home_t user_home_dir_t }:dir { watch watch_mount watch_sb watch_with_perm watch_reads };
+	allow $2 user_home_t:file { watch watch_mount watch_sb watch_with_perm watch_reads };
+	allow $2 user_home_t:lnk_file { watch watch_mount watch_sb watch_with_perm watch_reads };
+	allow $2 user_home_t:sock_file { watch watch_mount watch_sb watch_with_perm watch_reads };
+	allow $2 user_home_t:fifo_file { watch watch_mount watch_sb watch_with_perm watch_reads };
 
 	userdom_manage_user_certs($2)
 	userdom_user_home_dir_filetrans($2, user_cert_t, dir, ".pki")
@@ -623,6 +633,8 @@ template(`userdom_common_user_template',`
 	files_read_var_lib_files($1_t)
 	# Stat lost+found.
 	files_getattr_lost_found_dirs($1_t)
+	files_watch_etc_dirs($1_t)
+	files_watch_usr_dirs($1_t)
 
 	fs_rw_cgroup_files($1_t)
 
@@ -1171,6 +1183,7 @@ template(`userdom_unpriv_user_template', `
 	files_exec_usr_files($1_t)
 
 	miscfiles_manage_public_files($1_t)
+	miscfiles_watch_public_dirs($1_t)
 
 	tunable_policy(`user_dmesg',`
 		kernel_read_ring_buffer($1_t)
diff --git a/policy/modules/system/xdg.if b/policy/modules/system/xdg.if
index 11fc43069..823042414 100644
--- a/policy/modules/system/xdg.if
+++ b/policy/modules/system/xdg.if
@@ -83,6 +83,42 @@ interface(`xdg_search_cache_dirs',`
 	userdom_search_user_home_dirs($1)
 ')
 
+########################################
+## <summary>
+##	Watch the xdg cache home directories
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+#
+interface(`xdg_watch_cache_dirs',`
+	gen_require(`
+		type xdg_cache_t;
+	')
+
+	allow $1 xdg_cache_t:dir watch;
+')
+
+########################################
+## <summary>
+##	Watch all the xdg cache home directories
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+#
+interface(`xdg_watch_all_cache_dirs',`
+	gen_require(`
+		attribute xdg_cache_type;
+	')
+
+	allow $1 xdg_cache_type:dir watch;
+')
+
 ########################################
 ## <summary>
 ##	Read the xdg cache home files
@@ -333,6 +369,42 @@ interface(`xdg_search_config_dirs',`
 	userdom_search_user_home_dirs($1)
 ')
 
+########################################
+## <summary>
+##	Watch the xdg config home directories
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+#
+interface(`xdg_watch_config_dirs',`
+	gen_require(`
+		type xdg_config_t;
+	')
+
+	allow $1 xdg_config_t:dir watch;
+')
+
+########################################
+## <summary>
+##	Watch all the xdg config home directories
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+#
+interface(`xdg_watch_all_config_dirs',`
+	gen_require(`
+		attribute xdg_config_type;
+	')
+
+	allow $1 xdg_config_type:dir watch;
+')
+
 ########################################
 ## <summary>
 ##	Read the xdg config home files
@@ -563,6 +635,42 @@ interface(`xdg_relabel_all_config',`
 	userdom_search_user_home_dirs($1)
 ')
 
+########################################
+## <summary>
+##	Watch the xdg data home directories
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+#
+interface(`xdg_watch_data_dirs',`
+	gen_require(`
+		type xdg_data_t;
+	')
+
+	allow $1 xdg_data_t:dir watch;
+')
+
+########################################
+## <summary>
+##	Watch all the xdg data home directories
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+#
+interface(`xdg_watch_all_data_dirs',`
+	gen_require(`
+		attribute xdg_data_type;
+	')
+
+	allow $1 xdg_data_type:dir watch;
+')
+
 ########################################
 ## <summary>
 ##	Read the xdg data home files
@@ -793,6 +901,24 @@ interface(`xdg_relabel_all_data',`
 	userdom_search_user_home_dirs($1)
 ')
 
+########################################
+## <summary>
+##	Watch the xdg documents home directories
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+#
+interface(`xdg_watch_documents_dirs',`
+	gen_require(`
+		type xdg_documents_t;
+	')
+
+	allow $1 xdg_documents_t:dir watch;
+')
+
 ########################################
 ## <summary>
 ##	Create objects in the user home dir with an automatic type transition to
@@ -865,6 +991,24 @@ interface(`xdg_relabel_documents',`
 	userdom_search_user_home_dirs($1)
 ')
 
+########################################
+## <summary>
+##	Watch the xdg downloads home directories
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+#
+interface(`xdg_watch_downloads_dirs',`
+	gen_require(`
+		type xdg_downloads_t;
+	')
+
+	allow $1 xdg_downloads_t:dir watch;
+')
+
 #########################################
 ## <summary>
 ##	Read downloaded content
@@ -1006,6 +1150,24 @@ interface(`xdg_relabel_downloads',`
 	userdom_search_user_home_dirs($1)
 ')
 
+########################################
+## <summary>
+##	Watch the xdg pictures home directories
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+#
+interface(`xdg_watch_pictures_dirs',`
+	gen_require(`
+		type xdg_pictures_t;
+	')
+
+	allow $1 xdg_pictures_t:dir watch;
+')
+
 #########################################
 ## <summary>
 ##	Read user pictures content
@@ -1101,6 +1263,24 @@ interface(`xdg_relabel_pictures',`
 	userdom_search_user_home_dirs($1)
 ')
 
+########################################
+## <summary>
+##	Watch the xdg music home directories
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+#
+interface(`xdg_watch_music_dirs',`
+	gen_require(`
+		type xdg_music_t;
+	')
+
+	allow $1 xdg_music_t:dir watch;
+')
+
 #########################################
 ## <summary>
 ##	Read user music content
@@ -1196,6 +1376,24 @@ interface(`xdg_relabel_music',`
 	userdom_search_user_home_dirs($1)
 ')
 
+########################################
+## <summary>
+##	Watch the xdg video content
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+#
+interface(`xdg_watch_videos_dirs',`
+	gen_require(`
+		type xdg_videos_t;
+	')
+
+	allow $1 xdg_videos_t:dir watch;
+')
+
 #########################################
 ## <summary>
 ##	Read user video content
-- 
2.26.2