linux-kernel - Re: [PATCH] iscsi_ibft: filter null v4-mapped v6 addresses

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] [day] [month] [year] [list]

Date:	Mon, 11 May 2015 19:07:54 -0500
From:	Mike Christie <michaelc@...wisc.edu>
To:	Chris Leech <cleech@...hat.com>, linux-kernel@...r.kernel.org,
	Konrad Rzeszutek Wilk <konrad@...nel.org>
CC:	open-iscsi@...glegroups.com, linux-scsi@...r.kernel.org
Subject: Re: [PATCH] iscsi_ibft: filter null v4-mapped v6 addresses

On 05/08/2015 12:14 AM, Chris Leech wrote:
> I've had reports of UEFI platforms failing iSCSI boot in various
> configurations, that ended up being caused by network initialization
> scripts getting tripped up by unexpected null addresses (0.0.0.0) being
> reported for gateways, dhcp servers, and dns servers.
> 
> The tianocore EDK2 iSCSI driver generates an iBFT table that always uses
> IPv4-mapped IPv6 addresses for the NIC structure fields.  This results
> in values that are "not present or not specified" being reported as
> ::ffff:0.0.0.0 rather than all zeros as specified.
> 
> The iscsi_ibft module filters unspecified fields from the iBFT from
> sysfs, preventing userspace from using invalid values and making it easy
> to check for the presence of a value.  This currently fails in regard to
> these mapped null addresses.
> 
> In order to remain consistent with how the iBFT information is exposed,
> we should accommodate the behavior of the tianocore iSCSI driver as it's
> already in the wild in a large number of servers.
> 
> Tested under qemu using an OVMF build of tianocore EDK2.
> 
> Signed-off-by: Chris Leech <cleech@...hat.com>

Looks ok to me.

Reviewed-by: Mike Christie <michaelc@...wisc.edu>


--
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/