From owner-freebsd-current@FreeBSD.ORG Sun Sep 8 23:30:22 2013 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id B5F63D28 for ; Sun, 8 Sep 2013 23:30:22 +0000 (UTC) (envelope-from sean_bruno@yahoo.com) Received: from nm12-vm2.bullet.mail.ne1.yahoo.com (nm12-vm2.bullet.mail.ne1.yahoo.com [98.138.91.88]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 5381F26EA for ; Sun, 8 Sep 2013 23:30:22 +0000 (UTC) Received: from [98.138.90.56] by nm12.bullet.mail.ne1.yahoo.com with NNFMP; 08 Sep 2013 23:27:25 -0000 Received: from [98.138.226.57] by tm9.bullet.mail.ne1.yahoo.com with NNFMP; 08 Sep 2013 23:27:25 -0000 Received: from [127.0.0.1] by smtp208.mail.ne1.yahoo.com with NNFMP; 08 Sep 2013 23:27:25 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s1024; t=1378682845; bh=pk4bdTHyl1XixsQnpGPfuuWS14VkKLm/5qGkjeBCztg=; h=X-Yahoo-Newman-Id:X-Yahoo-Newman-Property:X-YMail-OSG:X-Yahoo-SMTP:X-Rocket-Received:Subject:From:Reply-To:To:Cc:In-Reply-To:References:Content-Type:Date:Message-ID:Mime-Version:X-Mailer; b=WL65mfLaOtY66/AvBO9fSsCL/A1n5+CK9vfriST872vreYfo7dMZVxjg9AnH62gv0xl6xOaqNg4nddrze/ZspMde/Iht9gntC5f5vA2kxtaz6molwsHprffLhWGl5SsIU+ZXuwFhUVhNs33IF/eR0alX2OakPZK4Z9hD71wBed8= X-Yahoo-Newman-Id: 563039.65531.bm@smtp208.mail.ne1.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: pST7exkVM1lyUchDWYtPZztOB.iXcXNhxzRBtaPQEffbe4X 9WNcUdRGdHthxLRx0qrcsEexLRqMcFhWWNK2SsRDUB8opEZmzsa1iy1r.fUb K2qiMONUxtiEBRCnvg_vKNFg1mCTNWhM4cDuDg9dJJzJHHT2n.n3Ym6a7X80 yj3S2gJkz9QwHkaaEQB_qYHIhnumw7YD5LHzmJpIyulAvlgdqMVYtkVa2k5k VSyYmWG.ligvQHz6dC6ggmsBpB3u_bJ4Gy_3p66w.zOsAxS1WWE17FmXAOcs zjw7vUC5r0CSMcRg6qAsmR1lwCsjEDxG0hZpUANabV_HvpkWYT11k_aZixw7 rAdTAmNHOWs0o6U56r4Rml7zK2uEktQzYhZHEi30eP7jFc_7bqnCUnaVmXNf KGbZEPFAxsfoN22OB6Zkw9CKWOCfeCktMOtrj_2ZfcZixTW1W7ej5HVMgF9k d1r1Wg73SgSDJ.drp3coO0oh9Qqm78hmvIYUBjnw5JWmr8IefkuH5dzQdmyT 0XrL.K91_Z.2rByIdPN8tzfA- X-Yahoo-SMTP: u5BKR6OswBC_iZJVfGRoMkTIpc8pEA4- X-Rocket-Received: from [192.168.1.228] (sean_bruno@71.202.40.63 with ) by smtp208.mail.ne1.yahoo.com with SMTP; 08 Sep 2013 16:27:25 -0700 PDT Subject: Re: Interesting panic from the Yahoo builder (10-current) From: Sean Bruno To: Davide Italiano In-Reply-To: References: <1378483253.1598.3.camel@localhost> Content-Type: multipart/signed; micalg="pgp-sha1"; protocol="application/pgp-signature"; boundary="=-sboHpiMVd+ONQKPvTdPj" Date: Sun, 08 Sep 2013 16:27:24 -0700 Message-ID: <1378682844.60317.0.camel@localhost> Mime-Version: 1.0 X-Mailer: Evolution 2.32.1 FreeBSD GNOME Team Port Cc: "freebsd-current@FreeBSD.org" X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list Reply-To: sbruno@freebsd.org List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 08 Sep 2013 23:30:22 -0000 --=-sboHpiMVd+ONQKPvTdPj Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable On Sat, 2013-09-07 at 17:05 +0200, Davide Italiano wrote:=20 > On Fri, Sep 6, 2013 at 6:00 PM, Sean Bruno wrote: > > Our "yBSD" builder needs to mount a disk image temporarily that has a > > dos partition (for openstack-ish things) to put configs into it. It > > seems that under high stress, we can squeeze a panic out of it in > > namei(). > > > > Sean > > > > > > Unread portion of the kernel message buffer: > > panic: namei: nameiop contaminated with flags > > cpuid =3D 8 > > KDB: stack backtrace: > > db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe048= d8e53b0 > > kdb_backtrace() at kdb_backtrace+0x39/frame 0xfffffe048d8e5460 > > vpanic() at vpanic+0x126/frame 0xfffffe048d8e54a0 > > kassert_panic() at kassert_panic+0x136/frame 0xfffffe048d8e5510 > > namei() at namei+0x2c8/frame 0xfffffe048d8e5600 > > msdosfs_mount() at msdosfs_mount+0x556/frame 0xfffffe048d8e57c0 > > vfs_donmount() at vfs_donmount+0xc35/frame 0xfffffe048d8e5aa0 > > sys_nmount() at sys_nmount+0x72/frame 0xfffffe048d8e5ae0 > > amd64_syscall() at amd64_syscall+0x223/frame 0xfffffe048d8e5bf0 > > Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe048d8e5bf0 > > --- syscall (378, FreeBSD ELF64, sys_nmount), rip =3D 0x8000a8b68a, rsp= =3D 0x7fffffffd508, rbp =3D 0x7fffffffdb30 --- > > Uptime: 34m55s > > Dumping 1140 out of 16350 MB:..2%..12%..22%..31%..41%..51%..61%..71%..8= 2%..92% > > > > Reading symbols from /boot/modules/msdosfs.ko...done. > > Loaded symbols for /boot/modules/msdosfs.ko > > #0 doadump (textdump=3D1) at pcpu.h:227 > > 227 pcpu.h: No such file or directory. > > in pcpu.h > > (kgdb) Hangup detected on fd 0 > > error detected on stdin >=20 > Can you please print the value of cnp->cn_nameiop (or, even better, > the whole struct) before the panic? >=20 > Thanks, >=20 Hrm ... tried to reproduce after recompiling the kernel (turning off KDB_UNATTENDED) and its not happening now. =20 I'll keep an eye out for it. Sean --=-sboHpiMVd+ONQKPvTdPj Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.14 (FreeBSD) iQEcBAABAgAGBQJSLQfRAAoJEBkJRdwI6BaHWDYH/0p6dlbM5H43Tkdbzg/75ySi RDppiHhhdV7FV+5nT517eIzfLk4voUeeyXTDx9auhCSFIjIEc86AN9/bdl+5265k bAPdVwHRG7atSnk8fECKyYF/a+qtONVJpxKyhMmf9WcHo7joQgZG6gvM0KMry15e Fqdir9DFSZ3pcDry7GwEhFaCDfbcySuof0ljULMJVP7dXMqFrVowgGDus1a2XcyI JkUb02uS+34pVApA3yiDG0P+7L3B1/8jf1maIUKIb3+l0wp5KJl5mJK9XodnKlSQ rN77whMmZwtpZcnRz/9sZ1A3hdTIn2F4YkswZR8Vag4THsb1CxhEDqZJTLhrcKU= =LtNe -----END PGP SIGNATURE----- --=-sboHpiMVd+ONQKPvTdPj--