apparmor: fix SECURITY_APPARMOR_HASH_DEFAULT parameter handling

The newly added Kconfig option could never work and just causes a build error when disabled: security/apparmor/lsm.c:675:25: error: 'CONFIG_SECURITY_APPARMOR_HASH_DEFAULT' undeclared here (not in a function) bool aa_g_hash_policy = CONFIG_SECURITY_APPARMOR_HASH_DEFAULT; The problem is that the macro undefined in this case, and we need to use the IS_ENABLED() helper to turn it into a boolean constant. Another minor problem with the original patch is that the option is even offered in sysfs when SECURITY_APPARMOR_HASH is not enabled, so this also hides the option in that case. Signed-off-by: Arnd Bergmann <[email protected]> Fixes: 6059f71 ("apparmor: add parameter to control whether policy hashing is used") Signed-off-by: John Johansen <[email protected]> Signed-off-by: James Morris <[email protected]>
JerzyD72 · Jul 27, 2016 · 7616ac7 · 7616ac7
1 parent 82cc1a4
commit 7616ac7
Show file tree

Hide file tree

Showing 3 changed files with 7 additions and 3 deletions.
diff --git a/security/apparmor/crypto.c b/security/apparmor/crypto.c
@@ -39,6 +39,9 @@ int aa_calc_profile_hash(struct aa_profile *profile, u32 version, void *start,
 	int error = -ENOMEM;
 	u32 le32_version = cpu_to_le32(version);
 
+	if (!aa_g_hash_policy)
+		return 0;
+
 	if (!apparmor_tfm)
 		return 0;
 

diff --git a/security/apparmor/lsm.c b/security/apparmor/lsm.c
@@ -671,9 +671,11 @@ enum profile_mode aa_g_profile_mode = APPARMOR_ENFORCE;
 module_param_call(mode, param_set_mode, param_get_mode,
 		  &aa_g_profile_mode, S_IRUSR | S_IWUSR);
 
+#ifdef CONFIG_SECURITY_APPARMOR_HASH
 /* whether policy verification hashing is enabled */
-bool aa_g_hash_policy = CONFIG_SECURITY_APPARMOR_HASH_DEFAULT;
+bool aa_g_hash_policy = IS_ENABLED(CONFIG_SECURITY_APPARMOR_HASH_DEFAULT);
 module_param_named(hash_policy, aa_g_hash_policy, aabool, S_IRUSR | S_IWUSR);
+#endif
 
 /* Debug mode */
 bool aa_g_debug;

diff --git a/security/apparmor/policy_unpack.c b/security/apparmor/policy_unpack.c
@@ -778,8 +778,7 @@ int aa_unpack(void *udata, size_t size, struct list_head *lh, const char **ns)
 		if (error)
 			goto fail_profile;
 
-		if (aa_g_hash_policy)
-			error = aa_calc_profile_hash(profile, e.version, start,
+		error = aa_calc_profile_hash(profile, e.version, start,
 						     e.pos - start);
 		if (error)
 			goto fail_profile;