Date: Sun, 30 Jun 2013 22:26:21 -0700 From: Gleb Kurtsou <gleb@freebsd.org> To: Mateusz Guzik <mjguzik@gmail.com>, koobs@FreeBSD.org, freebsd-current@FreeBSD.org Subject: Re: r248583 Kernel panic: negative refcount 0xfffffe0031b59168 Message-ID: <20130701052621.GA1349@reks> In-Reply-To: <20130630111836.GB22492@dft-labs.eu> References: <51CFDC86.2040506@FreeBSD.org> <20130630111836.GB22492@dft-labs.eu>
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On (30/06/2013 13:18), Mateusz Guzik wrote: > On Sun, Jun 30, 2013 at 05:21:42PM +1000, Kubilay Kocak wrote: > > I'm seeing what I believe is related panic, reliably being generated by > > the Python regression test suite on a newly created FreeBSD 10-CURRENT > > buildbot. > > > > Symptoms first seen in an freebsd.org FTP snapshot dated "Thu May 30 > > 20:01:46 UTC 2013" and also reproducible on a freshly updated r252400 > > > > It is additionally reproducible after checking out pure upstream python > > sources, using the following steps: > > > > hg clone http://hg.python.org/cpython > > cd cpython && configure && make buildbottest > > > > An interesting possible correlation is that it seems to drop out > > during/around "test_socket" > > > > Turns out the bug is quite funny ;) Patch fixes chrome for me. Thanks! > > Try this: > diff --git a/sys/kern/uipc_usrreq.c b/sys/kern/uipc_usrreq.c > index 5d8e814..7a4db04 100644 > --- a/sys/kern/uipc_usrreq.c > +++ b/sys/kern/uipc_usrreq.c > @@ -1764,8 +1764,8 @@ unp_externalize(struct mbuf *control, struct mbuf **controlp, int flags) > } > for (i = 0; i < newfds; i++, fdp++) { > fde = &fdesc->fd_ofiles[*fdp]; > - fde->fde_file = fdep[0]->fde_file; > - filecaps_move(&fdep[0]->fde_caps, > + fde->fde_file = fdep[i]->fde_file; > + filecaps_move(&fdep[i]->fde_caps, > &fde->fde_caps); > if ((flags & MSG_CMSG_CLOEXEC) != 0) > fde->fde_flags |= UF_EXCLOSE; > -- > Mateusz Guzik <mjguzik gmail.com> > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org"
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