From mboxrd@z Thu Jan 1 00:00:00 1970 From: Leon Romanovsky Subject: Re: WARNING: ODEBUG bug in process_one_req Date: Thu, 22 Mar 2018 17:13:58 +0200 Message-ID: <20180322151358.GE19440@mtr-leonro.local> References: <94eb2c0bc3aa8b2432056623c735@google.com> <20180322124823.GB19440@mtr-leonro.local> <20180322132031.GC19440@mtr-leonro.local> <20180322142900.GD19440@mtr-leonro.local> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="ScBGguMCFzdFq7Io" Return-path: Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org To: Dmitry Vyukov Cc: syzbot , danielj@mellanox.com, dledford@redhat.com, Jason Gunthorpe , Johannes Berg , LKML , linux-rdma@vger.kernel.org, monis@mellanox.com, Paolo Abeni , parav@mellanox.com, Roland Dreier , syzkaller-bugs@googlegroups.com, yuval.shaia@oracle.com List-Id: linux-rdma@vger.kernel.org --ScBGguMCFzdFq7Io Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Thu, Mar 22, 2018 at 03:47:41PM +0100, Dmitry Vyukov wrote: > On Thu, Mar 22, 2018 at 3:29 PM, Leon Romanovsky wrote: > > On Thu, Mar 22, 2018 at 02:36:55PM +0100, Dmitry Vyukov wrote: > >> On Thu, Mar 22, 2018 at 2:20 PM, Leon Romanovsky wrote: > >> > On Thu, Mar 22, 2018 at 02:10:21PM +0100, Dmitry Vyukov wrote: > >> >> This bug is actively happening several times per day, if such bug is > >> >> closed syzbot will open another bug on the next crash. > >> >> This bug has a reproducer, why do you think it is invalid? > >> > > >> > I tried to reproduce it on latest rdma-next and failed, so wanted to > >> > start from clean page and see if it is still relevant. > >> > >> Ah, I see. > >> You can now see the current status on dashboard: > >> https://syzkaller.appspot.com/bug?id=d4ac7bfeafac8a3d6d06123e078462ac765415e7 > >> Yes, it still happens. > >> > >> syzbot has already reported another incarnation of this bug, you can > >> see the link to dashboard in the email: > >> https://syzkaller.appspot.com/bug?extid=b8d5eb964e412cfd2678 > >> and it contains a link to the first version with reproducer. > >> > >> > Does it still reproduce on latest rdma-next? > >> > >> syzbot does not test rdma-next. > >> > >> But can you reproduce it on upstream tree where syzbot hits it? Just > >> to make sure, you have ODEBUG enabled, right? > > > > Thanks for the tip, I added more debug options and returned to try the > > repro on clean v4.16-rc1, it looks like I still don't have all needed > > config options (SELinux). > > > > mount(selinuxfs) failed (errno 2) > > > It seems that you have old syzkaller sources, it now explicitly does > not fail on ENOENT: > > // selinux mount used to be at /selinux, but then moved to /sys/fs/selinux. > const char* selinux_path = "./syz-tmp/newroot/selinux"; > if (mount("/selinux", selinux_path, NULL, mount_flags, NULL)) { > if (errno != ENOENT) > fail("mount(/selinux) failed"); > if (mount("/sys/fs/selinux", selinux_path, NULL, mount_flags, > NULL) && errno != ENOENT) > fail("mount(/sys/fs/selinux) failed"); > } > > > > Can you please cancel my email that closes this bug? > > There is no such option. The new bug is already created: > https://syzkaller.appspot.com/bug?id=6ecd3fdba0501c8843300056375abea0880816d2 > now if we open the old one, we now have 2 for the same root cause. It > will lead to mess. Still no luck, I'll leave this bug for now. Thanks --ScBGguMCFzdFq7Io Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEkhr/r4Op1/04yqaB5GN7iDZyWKcFAlqzyDYACgkQ5GN7iDZy WKcd3Q//cAEhAHVAtQFkl1E6IV9AFpUi3L3h6dHB/Qtbth2IFtd5BX6pYmoAufsw pSmXwiegc28LerIKc+A7B/uaLiJgVwVkBuagwHcAQwkvLQaGgXlYszF/wtHmXSL+ 9fsRh4wCsuwYKlwlGDSCMGE74F+XLxAhOcWSw5hQ57/wwr8e6cErWHVngCGS4p54 5vxODfJsjdszk1hgpvws79aSQ9/vD0OS+z/CKu7900XcOP1cTFmaRQzbbd0L0BpR 2sF7x37CJG9V1mBOLfS0uwsyswrJhGBdV4UT6nyml1X4yvQ7iENnciCRxkR8V0Wm kK2dj98/WyXKuZHiNTpQs4beAKULntvcx1P1ts8cuwqPXLqLT24Pva6iekLu8ibY Siv7iFgRRYMMjtIljkPJ0jvaR0q8Tj32O5U2bbkVUpw/5aedD1rhaLbEEUGy7s+c 4pbYNn3RRDaCt/dhvpzkUs3er7yTnpu0/ApII9H589tb6oWrl2w2i2kJ0/KrkZ5Q sGTPwktQROBVkEenBTi1T37Y/nHKO8iLhOr8UIS7CzV7e2iwnyuT3wSc//FMS7zU dPBnFDhXSvb/EECMHBJG+ZDFlwnrMsdtsV5GwFq+BPJWEH6oq1KLfexqqMMJSAHP BbJoXLWiL+D/d1Z6dL9ivRirUcZ5VNaAI7KJ/77XOQ3ZRG/eszU= =CmuX -----END PGP SIGNATURE----- --ScBGguMCFzdFq7Io--