From owner-freebsd-stable@FreeBSD.ORG Fri Dec 23 08:19:12 2011 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 893C11065675 for ; Fri, 23 Dec 2011 08:19:12 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from mail.zoral.com.ua (mx0.zoral.com.ua [91.193.166.200]) by mx1.freebsd.org (Postfix) with ESMTP id DE41A8FC0A for ; Fri, 23 Dec 2011 08:19:11 +0000 (UTC) Received: from alf.home (alf.kiev.zoral.com.ua [10.1.1.177]) by mail.zoral.com.ua (8.14.2/8.14.2) with ESMTP id pBN8J4le070428 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Fri, 23 Dec 2011 10:19:04 +0200 (EET) (envelope-from kostikbel@gmail.com) Received: from alf.home (kostik@localhost [127.0.0.1]) by alf.home (8.14.5/8.14.5) with ESMTP id pBN8J3eo085063; Fri, 23 Dec 2011 10:19:03 +0200 (EET) (envelope-from kostikbel@gmail.com) Received: (from kostik@localhost) by alf.home (8.14.5/8.14.5/Submit) id pBN8J3aL085062; Fri, 23 Dec 2011 10:19:03 +0200 (EET) (envelope-from kostikbel@gmail.com) X-Authentication-Warning: alf.home: kostik set sender to kostikbel@gmail.com using -f Date: Fri, 23 Dec 2011 10:19:03 +0200 From: Kostik Belousov To: Charlie Martin Message-ID: <20111223081903.GF50300@deviant.kiev.zoral.com.ua> References: <4EF3B790.5050509@sgi.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="wgLGSbGvrvJkgp+o" Content-Disposition: inline In-Reply-To: <4EF3B790.5050509@sgi.com> User-Agent: Mutt/1.4.2.3i X-Virus-Scanned: clamav-milter 0.95.2 at skuns.kiev.zoral.com.ua X-Virus-Status: Clean X-Spam-Status: No, score=-3.9 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 autolearn=ham version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on skuns.kiev.zoral.com.ua Cc: freebsd-stable@freebsd.org Subject: Re: Mystery panic, FreeBSD 7.2-PRE X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 23 Dec 2011 08:19:12 -0000 --wgLGSbGvrvJkgp+o Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Dec 22, 2011 at 04:04:48PM -0700, Charlie Martin wrote: > We've got another mystery panic in 7.2-PRE. Upgrading is not an option;= =20 > however, if this is familiar to anyone, backporting a patch would be. >=20 > The stack trace is: >=20 > db_trace_self_wrapper() at 0xffffffff8019120a =3D db_trace_self_wrapper+0= x2a^M > panic() at 0xffffffff80308797 =3D panic+0x187^M > devfs_populate_loop() at 0xffffffff802a45c8 =3D devfs_populate_loop+0x548= ^M > devfs_populate() at 0xffffffff802a46ab =3D devfs_populate+0x3b^M > devfs_lookup() at 0xffffffff802a7824 =3D devfs_lookup+0x264^M > VOP_LOO[24165][irq261: plx0] DEBUG (hasc_sv_rcv_cb): rcvd hrtbt ts=20 > 24051, 7/9, > rc 0^M > KUP_APV() at 0xffffffff804d5995 =3D VOP_LOOKUP_APV+0x95^M > lookup() at 0xffffffff80384a3e =3D lookup+0x4ce^M > namei() at 0xffffffff80385768 =3D namei+0x2c8^M > vn_open_cred() at 0xffffffff8039b283 =3D vn_open_cred+0x1b3^M > kern_open() at 0xffffffff8039a4a0 =3D kern_open+0x110^M > syscall() at 0xffffffff804b0e3c =3D syscall+0x1ec^M > Xfast_syscall() at 0xffffffff80494ecb =3D Xfast_syscall+0xab^M > --- syscall (5, FreeBSD ELF64, open), rip =3D 0x800e022fc, rsp =3D=20 > 0x7fffffbfa128, > rbp =3D 0x801002240 ---^M > KDB: enter: panic^M It is impossible to diagnose the real cause of the panic from the backtrace above. 99.99% of the issues causing that backtrace are problems in the specific drivers, which failed to dev_ref() the newly created cdev, e.g. in the clone handler. My interest in the issue is limited to the slightest possibility that the bug is not yet fixed in HEAD or 9/8. Usual suspects are tty, which were completely rototiled in 8. --wgLGSbGvrvJkgp+o Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.18 (FreeBSD) iEYEARECAAYFAk70OXcACgkQC3+MBN1Mb4hxUwCggg53PzaN8uy0tFe3H6DG1hIG NJkAmwW93DOHjIivkuSXpPwpRFVmk2Le =etWn -----END PGP SIGNATURE----- --wgLGSbGvrvJkgp+o--