linux-kernel - Re: [PATCH] arch:x86:coco:sev: Initialize ctxt variable

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]

Message-ID: <CAMj1kXHPut9qv7dT9Xv=xhbS6AP3HRP0dikk-G690AKfLuNLGA@mail.gmail.com>
Date: Fri, 15 Nov 2024 23:55:22 +0100
From: Ard Biesheuvel <ardb@...nel.org>
To: "Ragavendra B.N." <ragavendra.bn@...il.com>
Cc: Ingo Molnar <mingo@...nel.org>, tglx@...utronix.de, mingo@...hat.com, bp@...en8.de, 
	dave.hansen@...ux.intel.com, hpa@...or.com, thomas.lendacky@....com, 
	ashish.kalra@....com, tzimmermann@...e.de, bhelgaas@...gle.com, 
	x86@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arch:x86:coco:sev: Initialize ctxt variable

On Fri, 15 Nov 2024 at 20:53, Ragavendra B.N. <ragavendra.bn@...il.com> wrote:
>
> On Fri, Nov 15, 2024 at 12:02:27PM +0100, Ard Biesheuvel wrote:
> > On Fri, 15 Nov 2024 at 12:01, Ingo Molnar <mingo@...nel.org> wrote:
> > >
> > >
> > > * Ragavendra <ragavendra.bn@...il.com> wrote:
> > >
> > > > Updating the ctxt value to NULL in the svsm_perform_ghcb_protocol as
> > > > it was not initialized.
> > > >
> > > > Fixes: 2e1b3cc9d7f7 (grafted) Merge tag 'arm-fixes-6.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
> > >
> > > This 'Fixes' tag looks bogus.
> > >
> >
> > So does the patch itself - 'struct es_em_ctxt ctxt' is not a pointer.
> Thank you very much for your response. I am relatively new to kernel development.
>
> I know we can use kmalloc for memory allocation. Please advice.
>
> struct es_em_ctxt ctxt = kmalloc(sizeof(struct es_em_ctxt), GFP_KERNEL);
>
> I am thinking to update like above, but like you mentioned, ctxt is not a pointer. I can update this to be a pointer if needed.
>

The code is fine as is. Let's end this thread here, shall we?