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Date: Sun, 24 Apr 2005 09:57:46 -0700
From: Sam Leffler <sam@errno.com>
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Subject: Re: cvs commit: src/sys/sys _task.h taskqueue.h src/sys/kern    
 subr_taskqueue.c
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Sam Leffler wrote:
> sam         2005-04-24 16:52:45 UTC
> 
>   FreeBSD src repository
> 
>   Modified files:
>     sys/sys              _task.h taskqueue.h 
>     sys/kern             subr_taskqueue.c 
>   Log:
>   o eliminate modification of task structures after their run to avoid
>     modify-after-free races when the task structure is malloc'd
>   o shrink task structure by removing ta_flags (no longer needed with
>     avoid fix) and combining ta_pending and ta_priority

This fixes modify-after-free panics for memory owned by acpitask.  It's 
easy to hit if you use the ath driver on a laptop where acpi is active 
and load the wireless network.

	Sam