Date: Mon, 11 Jun 2012 07:17:35 +0200 From: Gustau Perez Querol <gperez@entel.upc.edu> To: Andrew Thompson <thompsa@freebsd.org> Cc: net@freebsd.org Subject: Re: Panic with if_bridge when removing components Message-ID: <3ef7f25e2c85a10266421a7e120d73c2@webmail.entel.upc.edu> In-Reply-To: <CAFAOGNRdNDV3JooR5hMjtD1W%2B8BkZU0U_8=CZLFgyimft6VEog@mail.gmail.com> References: <c3457a59051eba45d2204aa1fb7388db@webmail.entel.upc.edu> <CAFAOGNRdNDV3JooR5hMjtD1W%2B8BkZU0U_8=CZLFgyimft6VEog@mail.gmail.com>
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On Mon, 11 Jun 2012 08:49:29 +1200, Andrew Thompson wrote: > On 10 June 2012 02:27, Gustau Perez Querol <gperez@entel.upc.edu> > wrote: >> Hi, >> >> I'm seeing panics when removing an interface of a bridge. The >> system runs >> HEAD/AMD64 r236733. I see no changes to if_bridge.c in the last two >> days, so >> I would say the problem's still there. I also checked stable and the >> problem >> should be there too. >> >> The problem is that I have a bridge composed of two ethernet >> interfaces, an >> ath interface and a tap. As soon as I remove any of them the system >> panics. >> Because the system runs openvpn with the tap connected to the >> bridge, when >> the system starts to reboot, the openvpn daemon removes the tap and >> thus >> causing also the panic. >> >> The panic comes because at sys/net/if_bridge.c:943 the struct >> *ifnet->if_bridge of the interface removed is set to NULL too early. >> Because >> of this, at sys/net/if_bridge.c:996 we call >> if_bridge.c:bridge_linkstate >> where the struct *ifnet->if_bridge is needed. This causes the panic. > > > I introduced this issue in r234487, please try this patch. > http://people.freebsd.org/~thompsa/bridge_link.diff > > regards, > Andrew I'll check this evening (if time permits) and report back.
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