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Date:      Thu, 02 Sep 2021 21:30:01 +0000
From:      "Poul-Henning Kamp" <phk@phk.freebsd.dk>
To:        jo@bruelltuete.com, Johannes Totz via freebsd-hackers <freebsd-hackers@FreeBSD.org>
Subject:   Re: String functions considered unsafe in kernel
Message-ID:  <202109022130.182LU19L072509@critter.freebsd.dk>
In-Reply-To: <2b59c3ae-8330-facd-def9-c0640c56cf3a@bruelltuete.com>
References:  <2b59c3ae-8330-facd-def9-c0640c56cf3a@bruelltuete.com>

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--------
Johannes Totz via freebsd-hackers writes:

> there are a few string (copy, formatting) functions I would consider 
> unsafe when used in kernel, in particular when used with untrusted input 
> coming from user space.

This is precisely why des@ and I designed at created <sys/sbuf.h>.

Use it.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.



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