From owner-freebsd-bugs@freebsd.org Thu Feb 16 03:05:03 2017 Return-Path: Delivered-To: freebsd-bugs@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 3E4C1CDFBBF for ; Thu, 16 Feb 2017 03:05:03 +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 2DD8C1BB0 for ; Thu, 16 Feb 2017 03:05:03 +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 v1G352UW027423 for ; Thu, 16 Feb 2017 03:05:03 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 217126] reading data from fat32 USB card spontaneously reboots system Date: Thu, 16 Feb 2017 03:05:03 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 11.0-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: tcovert+freebsd@sahuagin.net 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: Message-ID: In-Reply-To: References: 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-bugs@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 16 Feb 2017 03:05:03 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D217126 --- Comment #3 from tcovert+freebsd@sahuagin.net --- I will give it a go. I didn't see anything on the terminal, just found myse= lf at the boot screen. In my attempt to dd the image, I got 4.1GB out of 32GB and a "device not configured". My attempt to have the drive show up on my mac was unsuccessfu= l, while another SD card would show up fine. So, I'm now suspecting that there is a data corruption on the SD card. I do= n't think it should still be able to reboot my machine, but it may not be somet= hing that would be normally expected. I'm happy to help how I can.=20 I'll turn debug.debugger_on_panic=3D1 and see if I can gather a backtrace. = I'm referencing https://www.freebsd.org/doc/en/books/developers-handbook/kerneldebug-gdb.ht= ml in the hopes that it'll lead me correctly. FWIW, I've got encrypted swap and zfs underneath the system.=20 > sysctl debug.debugger_on_panic debug.debugger_on_panic: 1 Indicates that this was already set during my last 3 reboots. /var/crash only contains minfree --=20 You are receiving this mail because: You are the assignee for the bug.=