linux-kernel - Re: [PATCH] KEYS: prevent NULL pointer dereference in find_asymmetric

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Message-ID: <7fd0f2a8252d4a6aa295adc1e76bc0e2@omp.ru>
Date: Wed, 20 Mar 2024 08:21:56 +0000
From: Roman Smirnov <r.smirnov@....ru>
To: Jarkko Sakkinen <jarkko@...nel.org>, David Howells <dhowells@...hat.com>,
	Herbert Xu <herbert@...dor.apana.org.au>, "David S. Miller"
	<davem@...emloft.net>, Andrew Zaborowski <andrew.zaborowski@...el.com>
CC: "keyrings@...r.kernel.org" <keyrings@...r.kernel.org>,
	"linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"lvc-project@...uxtesting.org" <lvc-project@...uxtesting.org>, "Sergey
 Shtylyov" <s.shtylyov@....ru>
Subject: Re: [PATCH] KEYS: prevent NULL pointer dereference in
 find_asymmetric_key()

On Tue, 19 Mar 2024 22:14:22 +0200 Jarkko Sakkinen wrote:
> On Tue Mar 19, 2024 at 4:44 PM EET, Roman Smirnov wrote:
> > On Tue, 19 Mar 2024 01:39:00 +0200 Jarkko Sakkinen wrote:
> > > On Fri Mar 15, 2024 at 12:33 PM EET, Roman Smirnov wrote:
[...]
> > > >
> > > > Found by Linux Verification Center (linuxtesting.org) with Svace.
> > > 
> > > I'm not sure if this should be part of the commit message.
> >
> > I have already submitted patches with this line, some have been
> > accepted. It is important for the Linux Verification Center to mark
> > patches as closing issues found with Svace.
> >
> > > >
> > > > Fixes: 7d30198ee24f ("keys: X.509 public key issuer lookup without AKID")
> > > > Suggested-by: Sergey Shtylyov <s.shtylyov@....ru>
> > > 
> > > Should be reported-by.
> >
> > The suggested-by tag belongs to Sergey because he suggested the fix,
> > subject/description of the patch. The tag reported-by belongs to
> > Svace tool.
>
> 1. I did not see any reported-by tags in this which is requirement.
> 2. Who did find the issue using that tool? I don't put reported-by to
>    GDB even if I use that find the bug.

Svace is an automated bug finding tool. This error was found during
source code analysis by the program, so the tag reported-by does not
belong to any person. I don't know what to do in such a situation,
but write something like:

    Reported-by: Svace

would be weird. I think that the line "Found by Linux ... with Svace"
could be a substitute for the tag.