From owner-freebsd-bugs@FreeBSD.ORG Mon Jan 7 15:50:01 2008 Return-Path: Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id E6EFB16A420 for ; Mon, 7 Jan 2008 15:50:01 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id BADA513C461 for ; Mon, 7 Jan 2008 15:50:01 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) by freefall.freebsd.org (8.14.2/8.14.2) with ESMTP id m07Fo12D060606 for ; Mon, 7 Jan 2008 15:50:01 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.2/8.14.1/Submit) id m07Fo1jm060605; Mon, 7 Jan 2008 15:50:01 GMT (envelope-from gnats) Resent-Date: Mon, 7 Jan 2008 15:50:01 GMT Resent-Message-Id: <200801071550.m07Fo1jm060605@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-bugs@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Jille Timmermans Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id DCECB16A421 for ; Mon, 7 Jan 2008 15:46:07 +0000 (UTC) (envelope-from root@blackbox.quis.cx) Received: from blackbox.quis.cx (ip83-113-174-82.adsl2.versatel.nl [82.174.113.83]) by mx1.freebsd.org (Postfix) with ESMTP id 7B4BE13C4CC for ; Mon, 7 Jan 2008 15:46:07 +0000 (UTC) (envelope-from root@blackbox.quis.cx) Received: from blackbox.quis.cx (localhost [127.0.0.1]) by blackbox.quis.cx (8.14.2/8.14.2) with ESMTP id m07AaXQ8000878; Mon, 7 Jan 2008 11:36:33 +0100 (CET) (envelope-from root@blackbox.quis.cx) Received: (from root@localhost) by blackbox.quis.cx (8.14.2/8.14.2/Submit) id m07AaXkK000877; Mon, 7 Jan 2008 11:36:33 +0100 (CET) (envelope-from root) Message-Id: <200801071036.m07AaXkK000877@blackbox.quis.cx> Date: Mon, 7 Jan 2008 11:36:33 +0100 (CET) From: Jille Timmermans To: FreeBSD-gnats-submit@FreeBSD.org X-Send-Pr-Version: 3.113 Cc: Ed Schouten Subject: kern/119422: Kernel panic (page fault) with devfs rules X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Jille Timmermans List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 07 Jan 2008 15:50:02 -0000 >Number: 119422 >Category: kern >Synopsis: Kernel panic (page fault) with devfs rules >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Mon Jan 07 15:50:00 UTC 2008 >Closed-Date: >Last-Modified: >Originator: Jille Timmermans >Release: FreeBSD 6.3-PRERELEASE i386 >Organization: None >Environment: System: FreeBSD blackbox.quis.cx 6.3-PRERELEASE FreeBSD 6.3-PRERELEASE #1: Sun Jan 6 23:24:15 CET 2008 root@blackbox.quis.cx:/usr/obj/usr/src/sys/BLACKBOX i386 And: FreeBSD istud.quis.cx 6.2-RELEASE-p4 FreeBSD 6.2-RELEASE-p4 #0: Sat May 12 16:41:58 CEST 2007 root@istud.quis.cx:/usr/obj/usr/src/sys/ISTUD i386 >Description: A kernel panic (page fault) occurs when trying to add/apply rules to a devfs mount. A value of a null-pointed struct is used in devfs_rule_match(). (/usr/src/sys/fs/devfs/devfs_rule.c:546) I can give you kernel dumps/backtraces if needed. >How-To-Repeat: # mkdir dev # mount -t devfs devfs dev # devfs -m dev ruleset 50 # devfs -m dev rule add type disk hide # devfs -m dev rule applyset >Fix: In /usr/src/sys/fs/devfs/devfs_rule.c:546 if (dev == NULL || Change into: if (dev == NULL || dev->si_devsw == NULL || I changed this and recompiled, the crash didn't occur anymore. >Release-Note: >Audit-Trail: >Unformatted: