M_SUBPROC use-after-free fix (Re: cvs commit: src/sys/sparc64/include md_var.h src/sys/sparc64/sparc64 machdep.c sys_machdep.c vm_machdep.c)

[Kris Kennaway]

On Tue, Feb 08, 2005 at 05:48:03PM +0000, John Baldwin wrote:
> jhb         2005-02-08 17:48:03 UTC
> 
>   FreeBSD src repository
> 
>   Modified files:        (Branch: RELENG_5)
>     sys/sparc64/include  md_var.h 
>     sys/sparc64/sparc64  machdep.c sys_machdep.c vm_machdep.c 
>   Log:
>   MFC: Add a small API to manage the MD user trap structures including adding
>   missing locking to close a race that resulted in use-after-free.

Oops, I thought this was already merged.  This explains the 'use after
free' panics that were still being reported on RELENG_5.  Users of SMP
sparc machines should update to incorporate this patch.

Kris
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