linux-kernel - Re: Hi all, bug or design flaw?

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Date:	Fri, 22 Jan 2010 01:25:44 +0000
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Stepan Chatalyan <kehcho@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Hi all, bug or design flaw?

On Fri, Jan 22, 2010 at 02:05:50AM +0100, Stepan Chatalyan wrote:
> (1) I mount /tmp with noexec,nosuid,nodev options

> (4) I tried to execute it, but pass to bash ". /tmp/createdfile"
> 
> [kehcho@...nadowt] [/tmp]$ . /tmp/createdfile
> Probe...
> 
> It is a kernel bug or I just report a another one?

What the hell does it have to do with the kernel?  You've told shell
to open a text file, read it and interpret its contents line by line.
It had done as instructed.  Moreover, bash /tmp/createdfile would work
just as fine.  Neither of those would attempt to do execve() on the
file in question; you are just telling shell what to open and read.
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