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Commit d07881d2 authored by John Johansen's avatar John Johansen
Browse files

apparmor: move new_null_profile to after profile lookup fns() 



new_null_profile will need to use some of the profile lookup fns()
so move instead of doing forward fn declarations.

Signed-off-by: default avatarJohn Johansen <john.johansen@canonical.com>
parent 651e28c5

security/apparmor/policy.c

+79 −79
Original line number Diff line number Diff line
@@ -289,85 +289,6 @@ struct aa_profile *aa_alloc_profile(const char *hname, struct aa_proxy *proxy, 
	return NULL;

}



/**

 * aa_new_null_profile - create or find a null-X learning profile

 * @parent: profile that caused this profile to be created (NOT NULL)

 * @hat: true if the null- learning profile is a hat

 * @base: name to base the null profile off of

 * @gfp: type of allocation

 *

 * Find/Create a null- complain mode profile used in learning mode.  The

 * name of the profile is unique and follows the format of parent//null-XXX.

 * where XXX is based on the @name or if that fails or is not supplied

 * a unique number

 *

 * null profiles are added to the profile list but the list does not

 * hold a count on them so that they are automatically released when

 * not in use.

 *

 * Returns: new refcounted profile else NULL on failure

 */

struct aa_profile *aa_new_null_profile(struct aa_profile *parent, bool hat,

				       const char *base, gfp_t gfp)

{

	struct aa_profile *profile;

	char *name;



	AA_BUG(!parent);



	if (base) {

		name = kmalloc(strlen(parent->base.hname) + 8 + strlen(base),

			       gfp);

		if (name) {

			sprintf(name, "%s//null-%s", parent->base.hname, base);

			goto name;

		}

		/* fall through to try shorter uniq */

	}



	name = kmalloc(strlen(parent->base.hname) + 2 + 7 + 8, gfp);

	if (!name)

		return NULL;

	sprintf(name, "%s//null-%x", parent->base.hname,

		atomic_inc_return(&parent->ns->uniq_null));



name:

	/* lookup to see if this is a dup creation */

	profile = aa_find_child(parent, basename(name));

	if (profile)

		goto out;



	profile = aa_alloc_profile(name, NULL, gfp);

	if (!profile)

		goto fail;



	profile->mode = APPARMOR_COMPLAIN;

	profile->label.flags |= FLAG_NULL;

	if (hat)

		profile->label.flags |= FLAG_HAT;

	profile->path_flags = parent->path_flags;



	/* released on free_profile */

	rcu_assign_pointer(profile->parent, aa_get_profile(parent));

	profile->ns = aa_get_ns(parent->ns);

	profile->file.dfa = aa_get_dfa(nulldfa);

	profile->policy.dfa = aa_get_dfa(nulldfa);



	mutex_lock(&profile->ns->lock);

	__add_profile(&parent->base.profiles, profile);

	mutex_unlock(&profile->ns->lock);



	/* refcount released by caller */

out:

	kfree(name);



	return profile;



fail:

	aa_free_profile(profile);

	return NULL;

}



/* TODO: profile accounting - setup in remove */



/**
@@ -558,6 +479,85 @@ struct aa_profile *aa_fqlookupn_profile(struct aa_label *base, 
	return profile;

}



/**

 * aa_new_null_profile - create or find a null-X learning profile

 * @parent: profile that caused this profile to be created (NOT NULL)

 * @hat: true if the null- learning profile is a hat

 * @base: name to base the null profile off of

 * @gfp: type of allocation

 *

 * Find/Create a null- complain mode profile used in learning mode.  The

 * name of the profile is unique and follows the format of parent//null-XXX.

 * where XXX is based on the @name or if that fails or is not supplied

 * a unique number

 *

 * null profiles are added to the profile list but the list does not

 * hold a count on them so that they are automatically released when

 * not in use.

 *

 * Returns: new refcounted profile else NULL on failure

 */

struct aa_profile *aa_new_null_profile(struct aa_profile *parent, bool hat,

				       const char *base, gfp_t gfp)

{

	struct aa_profile *profile;

	char *name;



	AA_BUG(!parent);



	if (base) {

		name = kmalloc(strlen(parent->base.hname) + 8 + strlen(base),

			       gfp);

		if (name) {

			sprintf(name, "%s//null-%s", parent->base.hname, base);

			goto name;

		}

		/* fall through to try shorter uniq */

	}



	name = kmalloc(strlen(parent->base.hname) + 2 + 7 + 8, gfp);

	if (!name)

		return NULL;

	sprintf(name, "%s//null-%x", parent->base.hname,

		atomic_inc_return(&parent->ns->uniq_null));



name:

	/* lookup to see if this is a dup creation */

	profile = aa_find_child(parent, basename(name));

	if (profile)

		goto out;



	profile = aa_alloc_profile(name, NULL, gfp);

	if (!profile)

		goto fail;



	profile->mode = APPARMOR_COMPLAIN;

	profile->label.flags |= FLAG_NULL;

	if (hat)

		profile->label.flags |= FLAG_HAT;

	profile->path_flags = parent->path_flags;



	/* released on free_profile */

	rcu_assign_pointer(profile->parent, aa_get_profile(parent));

	profile->ns = aa_get_ns(parent->ns);

	profile->file.dfa = aa_get_dfa(nulldfa);

	profile->policy.dfa = aa_get_dfa(nulldfa);



	mutex_lock(&profile->ns->lock);

	__add_profile(&parent->base.profiles, profile);

	mutex_unlock(&profile->ns->lock);



	/* refcount released by caller */

out:

	kfree(name);



	return profile;



fail:

	aa_free_profile(profile);

	return NULL;

}



/**

 * replacement_allowed - test to see if replacement is allowed

 * @profile: profile to test if it can be replaced  (MAYBE NULL)