Date: Tue, 26 Apr 2011 16:25:26 +0200 From: Bernhard Schmidt <bschmidt@freebsd.org> To: freebsd-stable@freebsd.org Cc: Gardner Bell <gardnerbell@gmail.com> Subject: Re: Fatal trap 12: page fault while in kernel mode Message-ID: <201104261625.26606.bschmidt@freebsd.org> In-Reply-To: <BANLkTimu0Y5Vp0apfNm8T=17K6zHY_BvfA@mail.gmail.com> References: <BANLkTinRyBaJMmFOLokedo_PHXpKEcWA6w@mail.gmail.com> <201104261012.57113.bschmidt@freebsd.org> <BANLkTimu0Y5Vp0apfNm8T=17K6zHY_BvfA@mail.gmail.com>
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On Tuesday, April 26, 2011 15:15:45 Gardner Bell wrote: > On Tue, Apr 26, 2011 at 4:12 AM, Bernhard Schmidt <bschmidt@freebsd.org> wrote: > > On Tuesday, April 26, 2011 01:09:42 Gardner Bell wrote: > >> Downloading a torrent with many peers on a toshiba satellite notebook > >> using an Atheros AR5006 wireless nic caused the following panic. This > >> is an i386 system running 8.2-STABLE from around April 06. > > > > Can you reproduce that? > > So far I've not been able to reproduce this. Ok. I assume this only happens when loosing the connection and trying to re-associate. At least that is the only possible scenario I can think of where a timeout for mgmt frames is involved. Probably we aren't bumping a refcount correctly or something. Actually that sounds rather plausible as it panics exactly when trying to access ni which should, for a station, always point to iv_bss, which can in turn be free'd almost unconditionally if someone's telling net80211 to associate to another (or even the same) network. Hmm.. tracing refcount it is. Were you running wpa_supplicant at that point? Any messages before the panic happened? -- Bernhard
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