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Date:      Wed, 30 Apr 1997 17:10:56 +0930 (CST)
From:      Michael Smith <msmith@atrad.adelaide.edu.au>
To:        avalon@coombs.anu.edu.au (Darren Reed)
Cc:        hackers@freebsd.org
Subject:   Re: Unloading LKMs (was Re: A Desparate Plea for Help...)
Message-ID:  <199704300740.RAA27412@genesis.atrad.adelaide.edu.au>
In-Reply-To: <199704300707.QAA27240@genesis.atrad.adelaide.edu.au> from Darren Reed at "Apr 30, 97 05:07:10 pm"

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Darren Reed stands accused of saying:
> 
> Hmmm, IP Filter unloads and reloads easily enough.

I expect that you take care to release your hooks before you go though,
correct?  There is no way of removing a devsw entry, and often 
no check made to ensure that it's safe to go.

> However, give some thought to a process which is in a kernel sleep state,
> inside the LKM and theLKM is removed, leaving the process still sleeping
> on a now invalid address.

Indeed.

-- 
]] Mike Smith, Software Engineer        msmith@gsoft.com.au             [[
]] Genesis Software                     genesis@gsoft.com.au            [[
]] High-speed data acquisition and      (GSM mobile)     0411-222-496   [[
]] realtime instrument control.         (ph)          +61-8-8267-3493   [[
]] Unix hardware collector.             "Where are your PEZ?" The Tick  [[



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