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selinux: randomize layout of key structures

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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 <sds@tycho.nsa.gov>
Reviewed-by: Kees Cook <keescook@chromium.org>
[PM: double semi-colon fixed]
Signed-off-by: Paul Moore <paul@paul-moore.com>
This commit is contained in:
Stephen Smalley
2019-12-13 15:28:38 -05:00
committed by Paul Moore
parent 6c5a682e64
commit 5c108d4e18
4 changed files with 4 additions and 4 deletions
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2
security/selinux/ss/policydb.h
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@@ -307,7 +307,7 @@ struct policydb {
u16 process_class;
u32 process_trans_perms;
};
} __randomize_layout;
extern void policydb_destroy(struct policydb *p);
extern int policydb_load_isids(struct policydb *p, struct sidtab *s);