From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Lameter Subject: Re: [Bugme-new] [Bug 33502] New: Caught 64-bit read from uninitialized memory in __alloc_skb Date: Tue, 10 May 2011 11:33:09 -0500 (CDT) Message-ID: References: <1303181466.4152.39.camel@edumazet-laptop> <1303182557.4152.48.camel@edumazet-laptop> <1303183217.4152.49.camel@edumazet-laptop> <1303244270.2756.3.camel@edumazet-laptop> <4DC90D7D.9030808@cs.helsinki.fi> <1305022632.2614.18.camel@edumazet-laptop> <4DC91137.4030109@cs.helsinki.fi> Mime-Version: 1.0 Content-Type: MULTIPART/MIXED; BOUNDARY="-1463811839-2087014141-1305045191=:2611" Cc: Eric Dumazet , casteyde.christian@free.fr, Andrew Morton , netdev@vger.kernel.org, bugzilla-daemon@bugzilla.kernel.org, bugme-daemon@bugzilla.kernel.org, Vegard Nossum To: Pekka Enberg Return-path: Received: from smtp108.prem.mail.ac4.yahoo.com ([76.13.13.47]:20291 "HELO smtp108.prem.mail.ac4.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1752451Ab1EJQdN (ORCPT ); Tue, 10 May 2011 12:33:13 -0400 In-Reply-To: <4DC91137.4030109@cs.helsinki.fi> Sender: netdev-owner@vger.kernel.org List-ID: This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. ---1463811839-2087014141-1305045191=:2611 Content-Type: TEXT/PLAIN; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE On Tue, 10 May 2011, Pekka Enberg wrote: > On 5/10/11 1:17 PM, Eric Dumazet wrote: > > Le mardi 10 mai 2011 =C3=A0 13:03 +0300, Pekka Enberg a =C3=A9crit : > > > > > Can't we fix the issue by putting kmemcheck_mark_initialized() to > > > set_freepointer()? > > > > This would solve kmemcheck problem, not DEBUG_PAGEALLOC > > Oh, right. Christoph? We need to support DEBUG_PAGEALLOC with SLUB. Well back to the #ifdef then? Or has DEBUG_PAGEALLOC some override mechanism that we can do a speculative memory access? ---1463811839-2087014141-1305045191=:2611--