linux-kernel - Re: [PATCH v2 1/2] ima: Free IMA measurement buffer on error

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Date:   Fri, 05 Feb 2021 12:49:41 -0500
From:   Mimi Zohar <zohar@...ux.ibm.com>
To:     Lakshmi Ramasubramanian <nramas@...ux.microsoft.com>,
        Greg KH <gregkh@...uxfoundation.org>
Cc:     bauerman@...ux.ibm.com, dmitry.kasatkin@...il.com,
        ebiederm@...ssion.com, sashal@...nel.org,
        tyhicks@...ux.microsoft.com, linux-integrity@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] ima: Free IMA measurement buffer on error

On Fri, 2021-02-05 at 09:39 -0800, Lakshmi Ramasubramanian wrote:
> On 2/5/21 2:05 AM, Greg KH wrote:
> > On Thu, Feb 04, 2021 at 09:49:50AM -0800, Lakshmi Ramasubramanian wrote:
> >> IMA allocates kernel virtual memory to carry forward the measurement
> >> list, from the current kernel to the next kernel on kexec system call,
> >> in ima_add_kexec_buffer() function.  In error code paths this memory
> >> is not freed resulting in memory leak.
> >>
> >> Free the memory allocated for the IMA measurement list in
> >> the error code paths in ima_add_kexec_buffer() function.
> >>
> >> Signed-off-by: Lakshmi Ramasubramanian <nramas@...ux.microsoft.com>
> >> Suggested-by: Tyler Hicks <tyhicks@...ux.microsoft.com>
> >> Fixes: 7b8589cc29e7 ("ima: on soft reboot, save the measurement list")
> >> ---
> >>   security/integrity/ima/ima_kexec.c | 1 +
> >>   1 file changed, 1 insertion(+)
> > 
> > <formletter>
> > 
> > This is not the correct way to submit patches for inclusion in the
> > stable kernel tree.  Please read:
> >      https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
> > for how to do this properly.
> > 
> > </formletter>
> > 
> 
> Thanks for the info Greg.
> 
> I will re-submit the two patches in the proper format.

No need.  I'm testing these patches now.  I'm not exactly sure what the
problem is.  Stable wasn't Cc'ed.  Is it that you sent the patch
directly to Greg or added "Fixes"?

thanks,

Mimi