From owner-freebsd-amd64@freebsd.org Sun Dec 11 10:55:25 2016 Return-Path: Delivered-To: freebsd-amd64@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 9A70FC712BB for ; Sun, 11 Dec 2016 10:55:25 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 71BF419F0 for ; Sun, 11 Dec 2016 10:55:25 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id uBBAtP5W018259 for ; Sun, 11 Dec 2016 10:55:25 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-amd64@FreeBSD.org Subject: [Bug 215209] Kernel panic at boot under XEN: integer divide fault while in kernel mode Date: Sun, 11 Dec 2016 10:55:25 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: sylvain@sylvaingarrigues.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter cc attachments.created Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-amd64@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Porting FreeBSD to the AMD64 platform List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 11 Dec 2016 10:55:25 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D215209 Bug ID: 215209 Summary: Kernel panic at boot under XEN: integer divide fault while in kernel mode Product: Base System Version: CURRENT Hardware: amd64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: sylvain@sylvaingarrigues.com CC: freebsd-amd64@FreeBSD.org CC: freebsd-amd64@FreeBSD.org Created attachment 177864 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D177864&action= =3Dedit EC2 log I had a system running FreeBSD 12 dated Nov. 3 2016. I updated from source = to 2016-12-10. Now kernel panics on boot: xenbusb_front0: on xenstore0 xn0: at device/vif/0 on xenbusb_front0 xn0: Ethernet address: 06:f6:cd:2a:fa:e1 xenbusb_back0: on xenstore0 xn0: backend features:xenballoon0: on xenstore0 feature-sg feature-gso-tcp4 Fatal trap 18: integer divide fault while in kernel mode xctrl0: on xenstore0 cpuid =3D 0; apic id =3D 00 instruction pointer =3D 0x20:0xffffffff808f24ad stack pointer =3D 0x28:0xfffffe003c91d9c0 frame pointer =3D 0x28:0xfffffe003c91da50 code segment =3D base 0x0, limit 0xfffff, type 0x1b xs_dev0: on xenstore0 =3D DPL 0, pres 1, long 1, def32 0, gran 1 processor eflags =3D interrupt enabled, resume, IOPL =3D 0 current process =3D 14 (xenwatch) [ thread pid 14 tid 100029 ] Stopped at xbd_backend_changed+0x84d: divq=20=20=20 0xffffffffffffffa8(%rbp),%eax db> Attached is full system log.=20 When I install a fresh FreeBSD snapshot on Amazon EC2, dated 2016-11-01, I don't have this bug. With the 2016-11-30, I do have it. --=20 You are receiving this mail because: You are on the CC list for the bug.=