Hello,
Tested without any problem so please picked up this for 4.4 to fix the problem. The patch below is slightly modified to adapt to this version.
[ Upstream commit 7616ac70d1bb4f2e9d25c1a82d283f3368a7b632 ]
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 arnd@arndb.de Fixes: 6059f71f1e94 ("apparmor: add parameter to control whether policy hashing is used") Signed-off-by: John Johansen john.johansen@canonical.com Signed-off-by: James Morris james.l.morris@oracle.com --- diff -Nurp a/security/apparmor/crypto.c b/security/apparmor/crypto.c --- a/security/apparmor/crypto.c +++ b/security/apparmor/crypto.c @@ -39,6 +39,9 @@ int aa_calc_profile_hash(struct aa_profi int error = -ENOMEM; u32 le32_version = cpu_to_le32(version);
+ if (!aa_g_hash_policy) + return 0; + if (!apparmor_tfm) return 0;
diff -Nurp a/security/apparmor/lsm.c b/security/apparmor/lsm.c --- a/security/apparmor/lsm.c +++ b/security/apparmor/lsm.c @@ -692,6 +692,12 @@ enum profile_mode aa_g_profile_mode = AP 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 = 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; module_param_named(debug, aa_g_debug, aabool, S_IRUSR | S_IWUSR); ---