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Re: [Bug-tar] opening files with O_NONBLOCK causes problems

From: Paul Eggert
Subject: Re: [Bug-tar] opening files with O_NONBLOCK causes problems
Date: Thu, 05 Jan 2012 16:40:35 -0800
User-agent: Mozilla/5.0 (X11; Linux i686; rv:8.0) Gecko/20111124 Thunderbird/8.0 
On 01/05/12 14:59, Kamil Dudka wrote:
> Is there a known attack on tar that the use of O_NONBLOCK can prevent?  

Yes, of course.  For example, the attacker can create a
hard link to a fifo while tar is running, which means that
root doing a backup will hang indefinitely.
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