linux-kernel - Re: [PATCH V8 3/3] Call ima_kexec_cmdline to measure the cmdline args

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Message-ID: <alpine.LRH.2.21.1906140516470.14107@namei.org>
Date:   Fri, 14 Jun 2019 05:16:59 +1000 (AEST)
From:   James Morris <jmorris@...ei.org>
To:     Prakhar Srivastava <prsriva02@...il.com>
cc:     linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org,
        linux-kernel@...r.kernel.org, zohar@...ux.ibm.com,
        roberto.sassu@...wei.com, vgoyal@...hat.com
Subject: Re: [PATCH V8 3/3] Call ima_kexec_cmdline to measure the cmdline
 args

On Wed, 12 Jun 2019, Prakhar Srivastava wrote:

> During soft reboot(kexec_file_load) boot cmdline args
> are not measured.Thus the new kernel on load boots with
> an assumption of cold reboot.
> 
> This patch makes a call to the ima hook ima_kexec_cmdline,
> added in "Define a new IMA hook to measure the boot command
> line arguments"
> to measure the boot cmdline args into the ima log.
> 
> - call ima_kexec_cmdline from kexec_file_load.
> - move the call ima_add_kexec_buffer after the cmdline
> args have been measured.
> 
> Signed-off-by: Prakhar Srivastava <prsriva02@...il.com>
> ---
>  kernel/kexec_file.c | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)


Reviewed-by: James Morris <jamorris@...ux.microsoft.com>


-- 
James Morris
<jmorris@...ei.org>