Merge branch 'master'; commit 'v3.2-rc2' into next
diff --git a/Documentation/security/00-INDEX b/Documentation/security/00-INDEX
index 19bc494..99b85d3 100644
--- a/Documentation/security/00-INDEX
+++ b/Documentation/security/00-INDEX
@@ -1,5 +1,7 @@
00-INDEX
- this file.
+LSM.txt
+ - description of the Linux Security Module framework.
SELinux.txt
- how to get started with the SELinux security enhancement.
Smack.txt
diff --git a/Documentation/security/LSM.txt b/Documentation/security/LSM.txt
new file mode 100644
index 0000000..c335a76
--- /dev/null
+++ b/Documentation/security/LSM.txt
@@ -0,0 +1,34 @@
+Linux Security Module framework
+-------------------------------
+
+The Linux Security Module (LSM) framework provides a mechanism for
+various security checks to be hooked by new kernel extensions. The name
+"module" is a bit of a misnomer since these extensions are not actually
+loadable kernel modules. Instead, they are selectable at build-time via
+CONFIG_DEFAULT_SECURITY and can be overridden at boot-time via the
+"security=..." kernel command line argument, in the case where multiple
+LSMs were built into a given kernel.
+
+The primary users of the LSM interface are Mandatory Access Control
+(MAC) extensions which provide a comprehensive security policy. Examples
+include SELinux, Smack, Tomoyo, and AppArmor. In addition to the larger
+MAC extensions, other extensions can be built using the LSM to provide
+specific changes to system operation when these tweaks are not available
+in the core functionality of Linux itself.
+
+Without a specific LSM built into the kernel, the default LSM will be the
+Linux capabilities system. Most LSMs choose to extend the capabilities
+system, building their checks on top of the defined capability hooks.
+For more details on capabilities, see capabilities(7) in the Linux
+man-pages project.
+
+Based on http://kerneltrap.org/Linux/Documenting_Security_Module_Intent,
+a new LSM is accepted into the kernel when its intent (a description of
+what it tries to protect against and in what cases one would expect to
+use it) has been appropriately documented in Documentation/security/.
+This allows an LSM's code to be easily compared to its goals, and so
+that end users and distros can make a more informed decision about which
+LSMs suit their requirements.
+
+For extensive documentation on the available LSM hook interfaces, please
+see include/linux/security.h.
diff --git a/Documentation/security/credentials.txt b/Documentation/security/credentials.txt
index fc0366c..8625705 100644
--- a/Documentation/security/credentials.txt
+++ b/Documentation/security/credentials.txt
@@ -221,10 +221,10 @@
(5) LSM
The Linux Security Module allows extra controls to be placed over the
- operations that a task may do. Currently Linux supports two main
- alternate LSM options: SELinux and Smack.
+ operations that a task may do. Currently Linux supports several LSM
+ options.
- Both work by labelling the objects in a system and then applying sets of
+ Some work by labelling the objects in a system and then applying sets of
rules (policies) that say what operations a task with one label may do to
an object with another label.
diff --git a/include/linux/security.h b/include/linux/security.h
index 19d8e04..051d4e9 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -2044,7 +2044,7 @@
static inline int security_inode_init_security(struct inode *inode,
struct inode *dir,
const struct qstr *qstr,
- initxattrs initxattrs,
+ const initxattrs initxattrs,
void *fs_data)
{
return 0;
diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index f466587..48a7d00 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -749,14 +749,6 @@
return length;
}
-static inline int hexcode_to_int(int code) {
- if (code == '\0' || !isxdigit(code))
- return -1;
- if (isdigit(code))
- return code - '0';
- return tolower(code) - 'a' + 10;
-}
-
static ssize_t sel_write_create(struct file *file, char *buf, size_t size)
{
char *scon = NULL, *tcon = NULL;
@@ -808,9 +800,11 @@
if (c1 == '+')
c1 = ' ';
else if (c1 == '%') {
- if ((c1 = hexcode_to_int(*r++)) < 0)
+ c1 = hex_to_bin(*r++);
+ if (c1 < 0)
goto out;
- if ((c2 = hexcode_to_int(*r++)) < 0)
+ c2 = hex_to_bin(*r++);
+ if (c2 < 0)
goto out;
c1 = (c1 << 4) | c2;
}