From: Thiago Jung Bauermann <bauerman@linux.ibm.com>
To: Mimi Zohar <zohar@linux.ibm.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>,
linux-doc@vger.kernel.org,
Dmitry Kasatkin <dmitry.kasatkin@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Jonathan Corbet <corbet@lwn.net>,
linux-kernel@vger.kernel.org, James Morris <jmorris@namei.org>,
David Howells <dhowells@redhat.com>,
"AKASHI, Takahiro" <takahiro.akashi@linaro.org>,
linux-security-module@vger.kernel.org, keyrings@vger.kernel.org,
linux-crypto@vger.kernel.org, Jessica Yu <jeyu@kernel.org>,
linux-integrity@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
David Woodhouse <dwmw2@infradead.org>,
"Serge E. Hallyn" <serge@hallyn.com>
Subject: Re: [PATCH v10 09/12] ima: Implement support for module-style appended signatures
Date: Tue, 28 May 2019 16:23:16 -0300 [thread overview]
Message-ID: <87zhn65qor.fsf@morokweng.localdomain> (raw)
In-Reply-To: <1557442868.10635.87.camel@linux.ibm.com>
Mimi Zohar <zohar@linux.ibm.com> writes:
> Hi Thiago,
>
>> diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c
>> index fca7a3f23321..a7a20a8c15c1 100644
>> --- a/security/integrity/ima/ima_policy.c
>> +++ b/security/integrity/ima/ima_policy.c
>> @@ -1144,6 +1144,12 @@ void ima_delete_rules(void)
>> }
>> }
>>
>> +#define __ima_hook_stringify(str) (#str),
>> +
>> +const char *const func_tokens[] = {
>> + __ima_hooks(__ima_hook_stringify)
>> +};
>> +
>> #ifdef CONFIG_IMA_READ_POLICY
>> enum {
>> mask_exec = 0, mask_write, mask_read, mask_append
>> @@ -1156,12 +1162,6 @@ static const char *const mask_tokens[] = {
>> "MAY_APPEND"
>> };
>>
>> -#define __ima_hook_stringify(str) (#str),
>> -
>> -static const char *const func_tokens[] = {
>> - __ima_hooks(__ima_hook_stringify)
>> -};
>> -
>> void *ima_policy_start(struct seq_file *m, loff_t *pos)
>> {
>> loff_t l = *pos;
>
> Is moving this something left over from previous versions or there is
> a need for this change?
Well, it's not a strong need, but it's still relevant in the current
version. I use func_tokens in ima_read_modsig() in order to be able to
mention the hook name in mod_check_sig()'s error message:
In ima_read_modsig():
rc = mod_check_sig(sig, buf_len, func_tokens[func]);
And in mod_check_sig():
pr_err("%s: Module is not signed with expected PKCS#7 message\n",
name);
If you think it's not worth it to expose func_tokens, I can make
ima_read_modsig() pass a more generic const string such as "IMA modsig"
for example.
> Other than this, the patch looks good.
Nice!
--
Thiago Jung Bauermann
IBM Linux Technology Center
next prev parent reply other threads:[~2019-05-28 19:27 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-18 3:51 [PATCH v10 00/12] Appended signatures support for IMA appraisal Thiago Jung Bauermann
2019-04-18 3:51 ` [PATCH v10 01/12] MODSIGN: Export module signature definitions Thiago Jung Bauermann
2019-05-09 15:42 ` Mimi Zohar
2019-05-28 19:03 ` Thiago Jung Bauermann
2019-04-18 3:51 ` [PATCH v10 02/12] PKCS#7: Refactor verify_pkcs7_signature() Thiago Jung Bauermann
2019-05-09 15:42 ` Mimi Zohar
2019-04-18 3:51 ` [PATCH v10 03/12] PKCS#7: Introduce pkcs7_get_digest() Thiago Jung Bauermann
2019-05-09 15:42 ` Mimi Zohar
2019-04-18 3:51 ` [PATCH v10 04/12] integrity: Introduce struct evm_xattr Thiago Jung Bauermann
2019-04-18 3:51 ` [PATCH v10 05/12] integrity: Select CONFIG_KEYS instead of depending on it Thiago Jung Bauermann
2019-04-18 3:51 ` [PATCH v10 06/12] ima: Use designated initializers for struct ima_event_data Thiago Jung Bauermann
2019-05-09 15:46 ` Mimi Zohar
2019-04-18 3:51 ` [PATCH v10 07/12] ima: Add modsig appraise_type option for module-style appended signatures Thiago Jung Bauermann
2019-04-18 3:51 ` [PATCH v10 08/12] ima: Factor xattr_verify() out of ima_appraise_measurement() Thiago Jung Bauermann
2019-05-09 15:53 ` Mimi Zohar
2019-04-18 3:51 ` [PATCH v10 09/12] ima: Implement support for module-style appended signatures Thiago Jung Bauermann
2019-05-09 23:01 ` Mimi Zohar
2019-05-28 19:23 ` Thiago Jung Bauermann [this message]
2019-05-28 20:06 ` Mimi Zohar
2019-05-14 12:09 ` Mimi Zohar
2019-05-28 19:27 ` Thiago Jung Bauermann
2019-04-18 3:51 ` [PATCH v10 10/12] ima: Collect modsig Thiago Jung Bauermann
2019-04-18 3:51 ` [PATCH v10 11/12] ima: Define ima-modsig template Thiago Jung Bauermann
2019-05-09 23:01 ` Mimi Zohar
2019-05-28 19:09 ` Thiago Jung Bauermann
2019-04-18 3:51 ` [PATCH v10 12/12] ima: Store the measurement again when appraising a modsig Thiago Jung Bauermann
2019-05-28 14:09 ` Mimi Zohar
2019-05-28 19:14 ` Thiago Jung Bauermann
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