linux-kernel - Re: [PATCH] ima: avoid appraise error for hash calc interrupt

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]

Message-ID: <3bb7ee92-9a8f-d180-a1dc-5f737db5252d@linux.microsoft.com>
Date:   Fri, 15 Nov 2019 12:34:59 -0800
From:   Lakshmi Ramasubramanian <nramas@...ux.microsoft.com>
To:     Patrick Callaghan <patrickc@...ux.vnet.ibm.com>,
        Mimi Zohar <zohar@...ux.ibm.com>,
        Patrick Callaghan <patrickc@...ux.ibm.com>,
        linux-integrity@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Sascha Hauer <s.hauer@...gutronix.de>
Subject: Re: [PATCH] ima: avoid appraise error for hash calc interrupt

On 11/15/19 7:25 AM, Patrick Callaghan wrote:

> Hello Laks,
> Agreed. The assumption is that integrity_kernel_read() function does
> not return a value greater than the fourth parameter passed to it (i.e.
> does not read more bytes from the file than the size of the buffer
> passed to it). I tried to validate that this assumption was true by
> following the code but felt I could not prove it with my current
> knowledge of the code. If this assumption is not true then I believe
> that any code change for this problem should go into a different
> patch.

I agree Patrick - not a blocker for this patch set.

thanks,
  -lakshmi