linux-kernel - Re: [Patch v3] firmware: dmi-sysfs: add SMBIOS entry point area raw attribute

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20150203104953.GA6461@codeblueprint.co.uk>
Date:	Tue, 3 Feb 2015 10:49:53 +0000
From:	Matt Fleming <matt@...eblueprint.co.uk>
To:	Ivan Khoronzhuk <ivan.khoronzhuk@...aro.org>
Cc:	linux-kernel@...r.kernel.org, ard.biesheuvel@...aro.org,
	grant.likely@...aro.org, matt.fleming@...el.com,
	linux-api@...r.kernel.org,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	dmidecode-devel@...gnu.org, leif.lindholm@...aro.org
Subject: Re: [Patch v3] firmware: dmi-sysfs: add SMBIOS entry point area raw
 attribute

On Wed, 28 Jan, at 05:56:25PM, Ivan Khoronzhuk wrote:
> >diff --git a/drivers/firmware/dmi-sysfs.c b/drivers/firmware/dmi-sysfs.c
> >index e0f1cb3..61b6a38 100644
> >--- a/drivers/firmware/dmi-sysfs.c
> >+++ b/drivers/firmware/dmi-sysfs.c
> >@@ -29,6 +29,8 @@
> >  #define MAX_ENTRY_TYPE 255 /* Most of these aren't used, but we consider
> >  			      the top entry type is only 8 bits */
> >+static const u8 *smbios_raw_header;

There appears to be a mixture of u8 and unsigned char going on here, cf.
'smbios_header'.

While I'm pretty sure all architectures typedef them to be equivalent,
semantically, as a reviewer this makes me think there are type issues.

Is there any way to use one data type for the SMBIOS header?

> >@@ -669,6 +699,18 @@ static int __init dmi_sysfs_init(void)
> >  		goto err;
> >  	}
> >+	smbios_raw_header = dmi_get_smbios_entry_area(&size);
> >+	if (!smbios_raw_header) {
> >+		pr_debug("dmi-sysfs: SMBIOS raw data is not available.\n");
> >+		error = -ENODATA;
> >+		goto err;

Perhaps this should be -EINVAL? -ENODATA implies that if you try again
in the future data might be available, i.e. it's a temporary failure.
That's not the case here since the header is invalid.

-- 
Matt Fleming, Intel Open Source Technology Center
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/