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To: dg@root.com
cc: cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG, cvs-sys@FreeBSD.ORG
Subject: Re: cvs commit: src/sys/kern kern_exec.c 
In-reply-to: Your message of "Tue, 16 Dec 1997 08:22:17 PST."
             <199712161622.IAA08136@implode.root.com> 
Date: Tue, 16 Dec 1997 17:34:04 +0100
Message-ID: <4070.882290044@critter.freebsd.dk>
From: Poul-Henning Kamp <phk@critter.freebsd.dk>
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Well, considering that you say it came in around march this year I'd 
say something has protected us pretty well from it...

Poul-Henning

In message <199712161622.IAA08136@implode.root.com>, David Greenman writes:
>>davidg      1997/12/16 07:40:31 PST
>>
>>  Modified files:
>>    sys/kern             kern_exec.c 
>>  Log:
>>  Fix bug where a struct buf was free()'d back to the system malloc pool.
>>  Quite amazing that the system runs at all with this bug. Also present in
>>  2.2.5. The bug appears to have come in with changes in rev 1.53.
>>  
>>  PR:           might fix PR#5313
>>  Submitted by: bde
>> 
>>  Revision  Changes    Path
>>  1.70      +3 -4      src/sys/kern/kern_exec.c
>
>   This log message is somewhat wrong. It's not the struct buf that was
>being free()'d, but rather the buffer mapping/target of the struct buf (the
>filesystem data). A serious bug nonetheless, and I can hardly imagine what
>this might do to the system.
>
>-DG
>
>David Greenman
>Core-team/Principal Architect, The FreeBSD Project
>

--
Poul-Henning Kamp             FreeBSD coreteam member
phk@FreeBSD.ORG               "Real hackers run -current on their laptop."