linux-kernel - Re: [PATCH] jfs: Fix fortify moan in symlink

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Message-ID: <202211011456.6B73479@keescook>
Date:   Tue, 1 Nov 2022 14:57:18 -0700
From:   Kees Cook <keescook@...omium.org>
To:     "Dr. David Alan Gilbert" <linux@...blig.org>
Cc:     shaggy@...nel.org, jfs-discussion@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org,
        syzbot+5fc38b2ddbbca7f5c680@...kaller.appspotmail.com
Subject: Re: [PATCH] jfs: Fix fortify moan in symlink

On Sat, Oct 29, 2022 at 01:48:05PM +0100, Dr. David Alan Gilbert wrote:
> * Kees Cook (keescook@...omium.org) wrote:
> > This looks like a GCC bug (going at least back to GCC 10.2)[1], but some
> > extra care around the macro appears to make it go away, so the reporting
> > variable doesn't get confused/re-evaluated:
> 
> Thanks for chasing that; are you also going to file a gcc bug?

No, I haven't had the time to minimize a PoC, so I'm not sure it would
make a very good bug report.

-- 
Kees Cook