linux-hardening - Re: [PATCH] xfs: replace deprecated strncpy with strscpy

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: <CAFhGd8pr5XycTH1iCUgBodCOV8_WY_da=aH+WZGPXfuOY5_Zgg@mail.gmail.com>
Date: Wed, 10 Apr 2024 13:45:21 -0700
From: Justin Stitt <justinstitt@...gle.com>
To: Kees Cook <keescook@...omium.org>
Cc: Chandan Babu R <chandan.babu@...cle.com>, "Darrick J. Wong" <djwong@...nel.org>, 
	linux-xfs@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-hardening@...r.kernel.org
Subject: Re: [PATCH] xfs: replace deprecated strncpy with strscpy_pad

On Tue, Apr 9, 2024 at 9:22 AM Kees Cook <keescook@...omium.org> wrote:
> >
> > -     /* 1 larger than sb_fname, so this ensures a trailing NUL char */
> > -     memset(label, 0, sizeof(label));
> >       spin_lock(&mp->m_sb_lock);
> > -     strncpy(label, sbp->sb_fname, XFSLABEL_MAX);
> > +     strscpy_pad(label, sbp->sb_fname);
>
> Is sbp->sb_fname itself NUL-terminated? This looks like another case of
> needing the memtostr() helper?
>

I sent a patch [1].

Obviously it depends on your implementation patch landing first; what
tree should it go to?

> Kees Cook

[1]: https://lore.kernel.org/r/20240410-strncpy-xfs-split1-v2-1-7c651502bcb0@google.com