: patch to update mount permissions

This patch adds a new interface for mount. It then uses the new interface and adds some permissions needed to use mount. It also adds a conditional block for redhat systems that use a mount script called /sbin/mount.tmpfs. Finally the patch adds a permission needed for example by ntfs-3g (storage_rw_fuse).

diff -pruN refpolicy-git-15022011-new-before-modification/policy/modules/kernel/corecommands.if refpolicy-git-15022011-new-modified/policy/modules/kernel/corecommands.if

policy/modules/kernel/corecommands.if +19 -0

@@ -808,6 +808,25 @@ interface(`corecmd_check_exec_shell',`
 
 ########################################
 ## <summary>
+##      Allow mmap_file_perms on a shell
+##      executable.
+## </summary>
+## <param name="domain">
+##      <summary>
+##      Domain allowed access.
+##      </summary>
+## </param>
+#
+interface(`corecmd_mmap_file_exec_shell',`
+        gen_require(`
+                type bin_t, shell_exec_t;
+        ')
+
+	mmap_files_pattern($1, bin_t, shell_exec_t)
+')
+
+########################################
+## <summary>
 ##	Execute shells in the caller domain.
 ## </summary>
 ## <desc>

diff -pruN refpolicy-git-15022011-new-before-modification/policy/modules/system/mount.te refpolicy-git-15022011-new-modified/policy/modules/system/mount.te

policy/modules/system/mount.te +15 -0

@@ -37,6 +37,11 @@ application_domain(unconfined_mount_t, m
 # setuid/setgid needed to mount cifs 
 allow mount_t self:capability { ipc_lock sys_rawio sys_admin dac_override chown sys_tty_config setuid setgid };
 
+ifdef(`distro_redhat',`
+	# needed by /sbin/mount.tmpfs bash script
+	allow mount_t self:fifo_file rw_fifo_file_perms;
+')
+
 allow mount_t mount_loopback_t:file read_file_perms;
 
 allow mount_t mount_tmp_t:file manage_file_perms;

@@ -51,15 +56,23 @@ kernel_read_kernel_sysctls(mount_t)
 kernel_dontaudit_getattr_core_if(mount_t)
 kernel_dontaudit_write_debugfs_dirs(mount_t)
 kernel_dontaudit_write_proc_dirs(mount_t)
+
 # To load binfmt_misc kernel module
 kernel_request_load_module(mount_t)
 
+kernel_setsched(mount_t)
+
 # required for mount.smbfs
 corecmd_exec_bin(mount_t)
 
+# required for mounting nonfs,nfs4,smbfs,ncpfs,cifs,gfs,gfs2
+# from initscripts 
+corecmd_mmap_file_exec_shell(mount_t)
+
 dev_getattr_all_blk_files(mount_t)
 dev_list_all_dev_nodes(mount_t)
 dev_read_sysfs(mount_t)
+dev_read_usbfs(mount_t)
 dev_dontaudit_write_sysfs_dirs(mount_t)
 dev_rw_lvm_control(mount_t)
 dev_dontaudit_getattr_all_chr_files(mount_t)

@@ -108,6 +121,8 @@ storage_raw_read_fixed_disk(mount_t)
 storage_raw_write_fixed_disk(mount_t)
 storage_raw_read_removable_device(mount_t)
 storage_raw_write_removable_device(mount_t)
+# needed for example by ntfs-3g
+storage_rw_fuse(mount_t)
 
 term_use_all_terms(mount_t)
 

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