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From: Robert Richter <rric@kernel.org>
To: Len Baker <len.baker@gmx.com>
Cc: Joe Perches <joe@perches.com>, Borislav Petkov <bp@alien8.de>,
	Mauro Carvalho Chehab <mchehab@kernel.org>,
	Tony Luck <tony.luck@intel.com>,
	James Morse <james.morse@arm.com>,
	Kees Cook <keescook@chromium.org>,
	linux-hardening@vger.kernel.org, linux-edac@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3] drivers/edac/edac_mc: Remove all strcpy() uses
Date: Mon, 9 Aug 2021 12:05:04 +0200	[thread overview]
Message-ID: <YRD90L6PMoVbbv+9@rric.localdomain> (raw)
In-Reply-To: <20210808112617.GA1927@titan>

On 08.08.21 13:26:17, Len Baker wrote:

> > Perhaps this should use scnprintf rather than strscpy
> > Something like:
> > 			n += scnprintf(buf + n, len - n, "%s",
> > 				       p == e->label ? dim->label : OTHER_LABEL);
> >
> In the first version [1] the scnprintf was used but Robert Richter don't
> see any benefit compared with the current implementation.
> 
> [1] https://lore.kernel.org/linux-hardening/20210725162954.9861-1-len.baker@gmx.com/

Reason is that there is the assumption that p must always point at the
end of the string and its trailing zero byte. I am not opposed using
the string function's return code instead of strlen() to get the
length. But why using formated output if strscpy() can be used?

-Robert

  reply	other threads:[~2021-08-09 10:05 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-07 15:59 Len Baker
2021-08-07 17:09 ` Joe Perches
2021-08-08 11:26   ` Len Baker
2021-08-09 10:05     ` Robert Richter [this message]
2021-08-09 17:18       ` Joe Perches
2021-08-10  8:56         ` David Laight
2021-08-10 14:36         ` Robert Richter
2021-08-10 15:02           ` Joe Perches
2021-08-11  7:40             ` Robert Richter
2021-08-09  9:51 ` Robert Richter
2021-08-09 16:25   ` Len Baker

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