From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wr0-f200.google.com (mail-wr0-f200.google.com [209.85.128.200]) by kanga.kvack.org (Postfix) with ESMTP id DC2F52803BB for ; Thu, 24 Aug 2017 07:48:36 -0400 (EDT) Received: by mail-wr0-f200.google.com with SMTP id x13so499707wre.7 for ; Thu, 24 Aug 2017 04:48:36 -0700 (PDT) Received: from mx1.suse.de (mx2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id u21si3429744wrf.190.2017.08.24.04.48.35 for (version=TLS1 cipher=AES128-SHA bits=128/128); Thu, 24 Aug 2017 04:48:35 -0700 (PDT) Date: Thu, 24 Aug 2017 13:48:34 +0200 From: Michal Hocko Subject: Re: Intermittent memory corruption with v4.13-rc6+ and earlier Message-ID: <20170824114833.GH5943@dhcp22.suse.cz> References: <20170824113743.GA14737@leverpostej> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170824113743.GA14737@leverpostej> Sender: owner-linux-mm@kvack.org List-ID: To: Mark Rutland Cc: linux-kernel@vger.kernel.org, syzkaller@googlegroups.com, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Alexander Viro , Andrew Morton , Jan Kara , Ingo Molnar , Peter Zijlstra , Thomas Gleixner , Vlastimil Babka , will.deacon@arm.com On Thu 24-08-17 12:37:43, Mark Rutland wrote: > Hi, > > I'm chasing intermittent memory corruption bugs seen at least on rc5, > rc6, and yesterday's HEAD (98b9f8a4549909c6), on arm64. > > It looks like we make use of dangling references to a freed struct file, > which is caught by KASAN. Without KASAN, I see a number of other > intermittent issues that I suspect are the result of this memory > corruption. I've included an example splat below, complete with KASAN's > alloc/free traces at the end of this mail. Is it possible this is the same issue as the one fixed by http://lkml.kernel.org/r/20170823211408.31198-1-ebiggers3@gmail.com? -- Michal Hocko SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org