From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 94EC5C10DCE for ; Thu, 12 Mar 2020 18:28:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 708D32072F for ; Thu, 12 Mar 2020 18:28:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1584037712; bh=OtLIxDI4nz/+LFfovnVLdTwnMBZbSC5JmD1+bjepytU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=DmADkr+TBpIhBuWfXFv0PUv0dlj22dAw+eefYcwzjU3Tag+wfosfCDDC2Nfs2F234 Ao+J/4OgUlQ7RidqRvo3H6GXPUDCrb/eqJOL29Ph/0Ss8XXjaLj+Tgdks3qYQMAAGt glWh3YqSDT1Z13kBxBwlAD2f2U3Ra+V2KI/0iG+o= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726523AbgCLS2c (ORCPT ); Thu, 12 Mar 2020 14:28:32 -0400 Received: from mail-qk1-f196.google.com ([209.85.222.196]:46198 "EHLO mail-qk1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726299AbgCLS2c (ORCPT ); Thu, 12 Mar 2020 14:28:32 -0400 Received: by mail-qk1-f196.google.com with SMTP id f28so7891523qkk.13; Thu, 12 Mar 2020 11:28:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=Z1+jrFk0l780LY82KtgQMlOjuOPnOSNUeBpKHT6Qy6g=; b=Im3J3CT7QT/G7DEOXBPU5qa5NpzXZfgFk285tuuYBMicpySswnkSvESZnO6jErqFRd UPjDpp+0r/vIODgW1k2ShKCiqBy9MmTZB95AFcHg6b7GeSpKBLUrNugoVoATGkaO79DP mcRtqwQ/zX3X63/A+7p6exSokHYdR7eIJBUgv5B5sY+P2DtU9pohuGZNPHsQfo0VFSI2 VxQkQ/6aIBCgeOjZES4EHfdnoV985yMvsQIIreKQVnp8LIh6qsdqDWBCyvkBNnEKbegw eLunF7LsF0q/MWSdI3ei6mjKA8959FeSB1VKEpCNXBnaDb99LSD6iiIueYU9p8geMzQv 814Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to; bh=Z1+jrFk0l780LY82KtgQMlOjuOPnOSNUeBpKHT6Qy6g=; b=I8ZDFnRMX4pvkgU2j0u0yY/djLRsHaPgEUY9wJNY4owkPY555l7HuYl3/q2Y9egQVO k8YiEj4CC0vC55Vji9SY1XbZc7J/OL9Iv+QT6BxMbHVXNFqc2ce9U0ViWHLOXFlzaxPP M+6r2cR457B/quC8+6wqWCxjBjkK43ZP1872rJuvehmqy+urzd2oIRDz3LU0cmTVDIXH TeSJRV7x2vj1IjPKDAKNjb5SgY4TlcuVwqtqwmlGaRqAeBTkxqAFV44L9zTK3sjWGkMq gCy4xpnOqjlYJYOCWP23JPNOoaA/X7mayP5ca0X0j7IPXg7bz8au34RN1w8iPClQnojl 794w== X-Gm-Message-State: ANhLgQ3Xp8s1GHOhRqkUNmUwrspEKU0pHJQqMLwkI20oP+2ydtW5vSb/ a8LgbCy0AlzPugVi/mbIbW4= X-Google-Smtp-Source: ADFU+vt9JCwr3OZM0QDXDy3zEeWocBIU5GDRQ52/xx5BmZffX9syssLvIR6XyxNZEWqjxRiPw4/j+w== X-Received: by 2002:a37:b146:: with SMTP id a67mr1341985qkf.473.1584037710282; Thu, 12 Mar 2020 11:28:30 -0700 (PDT) Received: from localhost ([2620:10d:c091:480::fec8]) by smtp.gmail.com with ESMTPSA id h5sm11049665qkc.118.2020.03.12.11.28.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 12 Mar 2020 11:28:29 -0700 (PDT) Date: Thu, 12 Mar 2020 14:28:26 -0400 From: Tejun Heo To: almasrymina@google.com, syzbot Cc: akpm@linux-foundation.org, andriin@fb.com, ast@kernel.org, bpf@vger.kernel.org, cgroups@vger.kernel.org, christian@brauner.io, daniel@iogearbox.net, hannes@cmpxchg.org, kafai@fb.com, linux-kernel@vger.kernel.org, lizefan@huawei.com, netdev@vger.kernel.org, sfr@canb.auug.org.au, songliubraving@fb.com, syzkaller-bugs@googlegroups.com, yhs@fb.com Subject: Re: KASAN: slab-out-of-bounds Read in cgroup_file_notify Message-ID: <20200312182826.GG79873@mtj.duckdns.org> References: <00000000000041c6c205a08225dc@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <00000000000041c6c205a08225dc@google.com> Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org On Tue, Mar 10, 2020 at 08:55:14AM -0700, syzbot wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit: c99b17ac Add linux-next specific files for 20200225 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=1610d70de00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=6b7ebe4bd0931c45 > dashboard link: https://syzkaller.appspot.com/bug?extid=cac0c4e204952cf449b1 > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1242e1fde00000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1110d70de00000 > > The bug was bisected to: > > commit 6863de00e5400b534cd4e3869ffbc8f94da41dfc > Author: Mina Almasry > Date: Thu Feb 20 03:55:30 2020 +0000 > > hugetlb_cgroup: add accounting for shared mappings Mina, can you please take a look at this? Thanks. -- tejun