From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753689AbbAUTGw (ORCPT ); Wed, 21 Jan 2015 14:06:52 -0500 Received: from bh-25.webhostbox.net ([208.91.199.152]:59186 "EHLO bh-25.webhostbox.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750917AbbAUTGl (ORCPT ); Wed, 21 Jan 2015 14:06:41 -0500 Message-ID: <54BFF8B3.6060802@roeck-us.net> Date: Wed, 21 Jan 2015 11:06:27 -0800 From: Guenter Roeck User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 MIME-Version: 1.0 To: Al Viro CC: Sabrina Dubroca , Paul Moore , Stephen Rothwell , linux-next@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-audit@redhat.com, Richard Guy Briggs Subject: Re: linux-next: Tree for Jan 20 -- Kernel panic - Unable to mount root fs References: <20150120232726.GA16913@kria> <1517211.UYLV49hvpg@sifl> <1528536.jyty2pu4Mz@sifl> <20150121004117.GM29656@ZenIV.linux.org.uk> <54BF1292.2080902@roeck-us.net> <20150121033600.GN29656@ZenIV.linux.org.uk> <54BF2496.4000807@roeck-us.net> <20150121043637.GO29656@ZenIV.linux.org.uk> <20150121110539.GA8924@kria> <54BFAA5D.4040108@roeck-us.net> <20150121182905.GQ29656@ZenIV.linux.org.uk> In-Reply-To: <20150121182905.GQ29656@ZenIV.linux.org.uk> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-Authenticated_sender: linux@roeck-us.net X-OutGoing-Spam-Status: No, score=-1.0 X-CTCH-PVer: 0000001 X-CTCH-Spam: Unknown X-CTCH-VOD: Unknown X-CTCH-Flags: 0 X-CTCH-RefID: str=0001.0A020204.54BFF8C0.00AD,ss=1,re=0.001,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0 X-CTCH-Score: 0.001 X-CTCH-ScoreCust: 0.000 X-CTCH-Rules: C_4847, X-CTCH-SenderID: linux@roeck-us.net X-CTCH-SenderID-Flags: 0 X-CTCH-SenderID-TotalMessages: 4 X-CTCH-SenderID-TotalSpam: 0 X-CTCH-SenderID-TotalSuspected: 0 X-CTCH-SenderID-TotalConfirmed: 0 X-CTCH-SenderID-TotalBulk: 0 X-CTCH-SenderID-TotalVirus: 0 X-CTCH-SenderID-TotalRecipients: 0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - bh-25.webhostbox.net X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - roeck-us.net X-Get-Message-Sender-Via: bh-25.webhostbox.net: mailgid no entry from get_relayhosts_entry X-Source: X-Source-Args: X-Source-Dir: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 01/21/2015 10:29 AM, Al Viro wrote: > On Wed, Jan 21, 2015 at 05:32:13AM -0800, Guenter Roeck wrote: >> Another data point (though I have no idea if it is useful or what it means): >> >> In the working case, path_init sets nd->flags to 0x50 or 0x51. >> In the non-working case (ie for all files with a '/' in the name), >> it sets nd->flags to 0x10 or 0x11, even though it is always called >> with the LOOKUP_RCU bit set in flags. > > Umm... Are those path_init() succeeding or failing? Note that path_init() > includes "walk everything except for the last component", so your non-working > case is "have it walk anything at all". What's failing there? path_init() > or handling the remaining component? > path_init() returns -2. Guess that explains the unexpected flags ;-). The failuere is from link_path_walk() walk_component() Guenter