cvs commit: src/sys/sys _task.h taskqueue.h src/sys/kern subr_taskqueue.c

[Sam Leffler]

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