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Subject: Re: 2.4+ptrace exploit fix breaks root's ability to strace
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Russell King <rmk@arm.linux.org.uk>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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On Sat, 2003-03-22 at 10:31, Russell King wrote:
> Hi,
> 
> Are the authors of the ptrace patch aware that, in addition to closing the
> hole, the "fix" also prevents a ptrace-capable task (eg, strace started by
> root) from ptracing user threads?
> 
> For example, you can't strace vsftpd processes started from xinetd.
> 
> Is this intended behaviour?

Its an unintended side effect, nobody has sent a patch to fix it yet.

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