panic: kern/52718
David Xu
davidxu at freebsd.org
Fri May 30 02:09:29 PDT 2003
----- Original Message -----
From: "Terry Lambert" <tlambert2 at mindspring.com>
To: "Bryan Liesner" <bleez at verizon.net>
Cc: <freebsd-current at freebsd.org>
Sent: Friday, May 30, 2003 5:02 PM
Subject: Re: panic: kern/52718
> Bryan Liesner wrote:
> >
> > Is anyone going to look at this before the next release?
> > Of course, if more info is needed, I'll send it along. No dump is
> > available - it panics during boot.
> >
> > http://www.freebsd.org/cgi/query-pr.cgi?pr=52718
>
> This was caused by rev. 1.3 of a commit by Jeff Robertson to
> kern_utmx.c. The problem is that the proc struct is not locked
> for:
>
> FOREACH_THREAD_IN_PROC(td->td_proc, td0)
>
> in the lock and unlock.
>
> Either lock the proc before and unlock it after this, in both
> _utmx_lock() and _utmx_unlock(), or revert the code to 1.2.
>
> It's pretty simple. No one needs t look at it, all they need
> to do is act on information already present.
>
kern_sig.c has same issue in several places.
> -- Terry
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David Xu
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