Date: Sun, 18 Feb 2007 14:38:45 -0500 From: Kris Kennaway <kris@obsecurity.org> To: Dmitry Pryanishnikov <dmitry@atlantis.dp.ua> Cc: Michael Nottebrock <lofi@freebsd.org>, stable@freebsd.org, Ian Smith <smithi@nimnet.asn.au>, Joe Vender <jvender@owensboro.net>, Kris Kennaway <kris@obsecurity.org> Subject: Re: pppd crashes, was: kde-freebsd] Question about KPPP on FreeBSD Message-ID: <20070218193845.GA54412@xor.obsecurity.org> In-Reply-To: <20070218192903.E47137@atlantis.atlantis.dp.ua> References: <200702071933.35688.lofi@freebsd.org> <Pine.BSF.3.96.1070208170852.12110A-100000@gaia.nimnet.asn.au> <20070208075657.GA98754@xor.obsecurity.org> <20070218192903.E47137@atlantis.atlantis.dp.ua>
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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. Kris
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