linux-kernel - Re: [lustre-devel] [PATCH 60/60] staging: lustre: libcfs: fix minimum size check for libcfs ioctl

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]

Date:   Wed, 1 Feb 2017 14:32:13 +0100
From:   Olaf Weber <olaf@....com>
To:     James Simmons <jsimmons@...radead.org>,
        Dan Carpenter <dan.carpenter@...cle.com>
CC:     <devel@...verdev.osuosl.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Oleg Drokin <oleg.drokin@...el.com>,
        Amir Shehata <amir.shehata@...el.com>,
        Lustre Development List <lustre-devel@...ts.lustre.org>
Subject: Re: [lustre-devel] [PATCH 60/60] staging: lustre: libcfs: fix minimum
 size check for libcfs ioctl

On 31-01-17 03:25, James Simmons wrote:

[...]

>> Also I'm uncomfortable with:
>>
>> 	data = container_of(hdr, struct libcfs_ioctl_data, ioc_hdr);
>>
>> If hdr isn't the first member of the struct then the code is broken but
>> container_of() implies that that isn't a hard requirement.  It should
>> just be:
>>
>> 	data = (struct libcfs_ioctl_data *)hdr;
>
> Don't know if hdr being first is a hard requirment. Doug, Amir do you know
> if it is an requirement?

It's a requirement.

-- 
Olaf Weber                 SGI               Phone:  +31(0)30-6696796
                            Veldzigt 2b       Fax:    +31(0)30-6696799
Sr Software Engineer       3454 PW de Meern  Vnet:   955-6796
Storage Software           The Netherlands   Email:  olaf@....com