selinux: randomize layout of key structures
Randomize the layout of key selinux data structures.
Initially this is applied to the selinux_state, selinux_ss,
policydb, and task_security_struct data structures.
NB To test/use this mechanism, one must install the
necessary build-time dependencies, e.g. gcc-plugin-devel on Fedora,
and enable CONFIG_GCC_PLUGIN_RANDSTRUCT in the kernel configuration.
Signed-off-by: Stephen Smalley <[email protected]>
Reviewed-by: Kees Cook <[email protected]>
[PM: double semi-colon fixed]
Signed-off-by: Paul Moore <[email protected]>
diff --git a/security/selinux/include/objsec.h b/security/selinux/include/objsec.h
index a4a86cb..330b7b6 100644
--- a/security/selinux/include/objsec.h
+++ b/security/selinux/include/objsec.h
@@ -35,7 +35,7 @@ struct task_security_struct {
u32 create_sid; /* fscreate SID */
u32 keycreate_sid; /* keycreate SID */
u32 sockcreate_sid; /* fscreate SID */
-};
+} __randomize_layout;
enum label_initialized {
LABEL_INVALID, /* invalid or not initialized */
