From: Eric Snowberg <eric.snowberg@oracle.com>
To: "Mickaël Salaün" <mic@digikod.net>
Cc: David Howells <dhowells@redhat.com>,
dwmw2@infradead.org, Jarkko Sakkinen <jarkko@kernel.org>,
James.Bottomley@HansenPartnership.com, masahiroy@kernel.org,
michal.lkml@markovi.net, jmorris@namei.org, serge@hallyn.com,
ardb@kernel.org, Mimi Zohar <zohar@linux.ibm.com>,
lszubowi@redhat.com, javierm@redhat.com,
keyrings@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-kbuild@vger.kernel.org,
linux-security-module@vger.kernel.org,
Tyler Hicks <tyhicks@linux.microsoft.com>,
Eric Snowberg <eric.snowberg@oracle.com>
Subject: Re: Conflict with Mickaël Salaün's blacklist patches [was [PATCH v5 0/4] Add EFI_CERT_X509_GUID support for dbx/mokx entries]
Date: Mon, 8 Feb 2021 16:05:01 -0700 [thread overview]
Message-ID: <74EC102D-BD18-4863-A7FB-C88439654C8C@oracle.com> (raw)
In-Reply-To: <99066eb7-53ac-41b0-46cf-36ea3d7f6590@digikod.net>
> On Feb 6, 2021, at 11:30 AM, Mickaël Salaün <mic@digikod.net> wrote:
>
> On 06/02/2021 02:14, Eric Snowberg wrote:
>
>> I have done some additional testing, I am seeing a regression. The blacklist
>> keyring is no longer picking up any of the hashes from the dbx during boot.
>> I backed out the merge with my changes (fdbbe7ceeb95090d09c33ce0497e0394c82aa33d)
>> and still see the regression. I then backed out Mickaël merge
>> (5bf1adccf5c41dbdd51d1f4de220d335d9548598) and it fixes the regression.
>>
>> On a x86 with the updated dbx from uefi.org, I’d expect to see 234 bin hash entries
>> in the blacklist keyring. With the current merged code, there is none.
>
> Hum, I missed a part in refactoring (commit
> f78e50c8f750c0ac6767ac1ed006360cf77c56c4). :/
> Could you please test the following patch?
>
> diff --git a/certs/blacklist.c b/certs/blacklist.c
> index 07c592ae5307..f998a2e85ddc 100644
> --- a/certs/blacklist.c
> +++ b/certs/blacklist.c
> @@ -197,13 +197,16 @@ int mark_hash_blacklisted(const u8 *hash, size_t
> hash_len,
> enum blacklist_hash_type hash_type)
> {
> const char *buffer;
> + int err;
>
> buffer = get_raw_hash(hash, hash_len, hash_type);
> if (IS_ERR(buffer))
> return PTR_ERR(buffer);
> + err = mark_raw_hash_blacklisted(buffer);
> kfree(buffer);
> - return 0;
> + return err;
> }
I applied this patch, it works better, but there is still a regression.
Most of the hashes show up in the blacklist keyring now. However some
do not, here is what I see in the log during boot:
[ 2.321876] blacklist: Problem blacklisting hash (-13)
[ 2.322729] blacklist: Problem blacklisting hash (-13)
[ 2.323549] blacklist: Problem blacklisting hash (-13)
[ 2.324369] blacklist: Problem blacklisting hash (-13)
> Is it possible to test these kind of dbx blacklist with Qemu?
Yes, just use OVMF.
next prev parent reply other threads:[~2021-02-08 23:07 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-22 18:10 [PATCH v5 0/4] Add EFI_CERT_X509_GUID support for dbx/mokx entries Eric Snowberg
2021-01-22 18:10 ` [PATCH v5 1/4] certs: Add EFI_CERT_X509_GUID support for dbx entries Eric Snowberg
2021-01-28 3:54 ` Nayna
2021-01-28 4:11 ` Eric Snowberg
2021-01-28 15:35 ` Nayna
2021-01-28 15:58 ` David Howells
2021-01-29 1:56 ` Eric Snowberg
2021-01-22 18:10 ` [PATCH v5 2/4] certs: Move load_system_certificate_list to a common function Eric Snowberg
2021-01-22 18:10 ` [PATCH v5 3/4] certs: Add ability to preload revocation certs Eric Snowberg
2021-01-22 18:10 ` [PATCH v5 4/4] integrity: Load mokx variables into the blacklist keyring Eric Snowberg
2021-01-28 15:16 ` [PATCH v5 0/4] Add EFI_CERT_X509_GUID support for dbx/mokx entries David Howells
2021-01-28 15:27 ` Mimi Zohar
2021-01-28 15:29 ` Mimi Zohar
2021-01-28 15:41 ` Eric Snowberg
2021-02-03 16:26 ` Conflict with Mickaël Salaün's blacklist patches [was [PATCH v5 0/4] Add EFI_CERT_X509_GUID support for dbx/mokx entries] David Howells
2021-02-03 18:49 ` Mickaël Salaün
2021-02-04 3:53 ` Eric Snowberg
2021-02-04 8:26 ` Mickaël Salaün
2021-02-05 0:24 ` Eric Snowberg
2021-02-05 10:27 ` Mickaël Salaün
2021-02-06 1:14 ` Eric Snowberg
2021-02-06 18:30 ` Mickaël Salaün
2021-02-08 23:05 ` Eric Snowberg [this message]
2021-02-09 21:53 ` Mickaël Salaün
2021-02-10 12:07 ` Mickaël Salaün
2021-02-09 13:14 ` David Howells
2021-02-09 13:59 ` Mickaël Salaün
2021-02-09 16:46 ` David Howells
2021-02-12 11:49 ` Jarkko Sakkinen
2021-02-04 9:11 ` David Howells
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