Date: Sat, 29 Jul 2017 07:28:03 +0000 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: bugzilla-noreply@freebsd.org Cc: freebsd-fs@FreeBSD.org Subject: Re: [Bug 221064] zfs should not be able to shadow mount on root directory from userspace Message-ID: <64645.1501313283@critter.freebsd.dk> In-Reply-To: <bug-221064-3630-CUGgC70s9s@https.bugs.freebsd.org/bugzilla/> References: <bug-221064-3630@https.bugs.freebsd.org/bugzilla/> <bug-221064-3630-CUGgC70s9s@https.bugs.freebsd.org/bugzilla/>
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-------- In message <bug-221064-3630-CUGgC70s9s@https.bugs.freebsd.org/bugzilla/>, = bugzi lla-noreply@freebsd.org writes: >I personally think that allowing to mount over / is more dangerous than u= seful. Quite the contrary, it is far more useful than dangerous: It is not uncommon for embedded systems to boot with a absolutely minimal root filesystem compiled into the kernel, and /sbin/init in that filesystem will mount the "real" root over / and exec the "real" /sbin/init. -- = 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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