pppd crashes, was: kde-freebsd] Question about KPPP on FreeBSD

Kris Kennaway kris at obsecurity.org
Sun Feb 18 19:38:46 UTC 2007

On Sun, Feb 18, 2007 at 09:31:47PM +0200, Dmitry Pryanishnikov wrote:
> Hello!
> On Thu, 8 Feb 2007, Kris Kennaway wrote:
> >Not that it contradicts anything you said, but it's worth
> >re-emphasizing that there is apparently no-one in the community
> >interested in maintaining pppd on FreeBSD, which is how it got to the
> >current sorry state.
>   I agree that the absence of ppp(4) maintainer makes it harder to fix
> problems with this code. OTOH, I haven't found a single more-or-less 
> informative PR regarding ppp(4)-related crashes in recent FreeBSD branches
> in the GNATS database. Maybe it's due to the poor repeatability of the
> problem due to its race-like nature. I've decided to fill up this gap,
> see
> 	http://www.freebsd.org/cgi/query-pr.cgi?pr=109277
> The problem looks like a lack of proper locking during the operations with 
> clist (specifically, this causes multiple entry to cblock_alloc()).
> I'm ready to provide further debugging information on this issue.
> Unfortunately, I'm not familiar enough with the locking concepts
> in modern FreeBSD kernels (and in tty subsystem particularly)
> in order to make the fix myself.

...and that's the problem :) You could do this additional work, but
you'd be wasting your time.


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