Received: by 2002:ac0:a582:0:0:0:0:0 with SMTP id m2-v6csp4979293imm; Tue, 9 Oct 2018 08:01:04 -0700 (PDT) X-Google-Smtp-Source: ACcGV60T+O9QpuDYLoKTb8A8qbM5urjovPmlGl6at5vt0r1f6drJcqaWQjZ+yCjLBDRJHzjANrhK X-Received: by 2002:a63:6ec4:: with SMTP id j187-v6mr26330047pgc.3.1539097264819; Tue, 09 Oct 2018 08:01:04 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1539097264; cv=none; d=google.com; s=arc-20160816; b=haMM+dUCFifZkAJx2rj/bHgCWWQzdKqH7o+9kUIPrtmgewJXBmaNshpD6/iA9qzaF2 vHM4h17U1w/CJIhq9jN/Sl1d9bUHLcfnPceKTi0j8zqsT11WxEKcLqUi0UfCbAnW4zQb afFtx350oRLsojtEud4+QgQ+EdFWvjOqJN0WDfRDY+BtisMFuuKkfqJdkyXsn8BNZZ/S Ut/gEnSt+k4vgUlaVnUeOfS9uJPPBCVA0YApqDUNaz6LnU69Ne+7b1HoB16OP/jJcQYJ sUA+LK1APduE6McFNMFRRZAU4tcYt6tx3PVcASJzf/wQXTfpb+zxgMuulkK2AqwFyq/s fF+g== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding :content-language:in-reply-to:mime-version:user-agent:date :message-id:from:references:cc:to:subject:dkim-signature; bh=ZxiI7aNf4MPsBPvgfy9JgBpDO30bdl/+v1RrtegkG4Y=; b=QVf4Kc0IpiFLXWVBWbhP9w/osNyTL+I+4VAkL98e95XWYTTN5Q4ce9X+rqnJ8tYToT 68UEf/4vra0c2lPOjBTFEMxTKAQ9ms+o/PWyoH99m3PW25GKSkAY3/Vu5WVYc9IYvoZj YMLblGX5cTqPSHcYYxZPPr59gk/0qo4sbZ4avbj1W7le1lcpBi6b0yj0sajgfinOYr9O 5i+4SdAYbXN/wcMdthZjdNAFXKORCVRLMyWliKzMaLwq+RkXVL3ysDVrQrJgZ+LqZ/lk kBhfncCWdImbP42d+IX2V4Bd+/7AmkmMOeE/0vlTc3Myh0m37kzfApV41n5xHKJ/i0Lr C2Ow== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=VZBPda2f; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id gn7si20527580plb.264.2018.10.09.08.00.48; Tue, 09 Oct 2018 08:01:04 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=VZBPda2f; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727258AbeJIWR1 (ORCPT + 99 others); Tue, 9 Oct 2018 18:17:27 -0400 Received: from mail-pf1-f194.google.com ([209.85.210.194]:42401 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726434AbeJIWR0 (ORCPT ); Tue, 9 Oct 2018 18:17:26 -0400 Received: by mail-pf1-f194.google.com with SMTP id f26-v6so974441pfn.9; Tue, 09 Oct 2018 08:00:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=ZxiI7aNf4MPsBPvgfy9JgBpDO30bdl/+v1RrtegkG4Y=; b=VZBPda2fulVDC5wvBjZHqGM9qs5rJqmd53Xu25Li4x7AUhpKYg6L/1Rv6on62Co/VN 5MskN3oCnb6tJQvpYcNbUgUMzW6pxuSfCcBmn8HEK9055JhuZ6kExU8Hy+hRAGXHApqL 1vKeI8PpEa45GJM/WMBAuT0qsvJ5gKScAygTpTdKZj2kaXPjIkAPCMtQqtIjS/uk6O3k 7gLZp3wEwZTwFdlXWDN6l2NETq0mw1TcmRDo43sz9aGvj7a1/GbM3E+8sOcitgwMFDnc i00Ehv67erhQI3p+mmBwokCaWjtutWlOOKyzUlEIXluvbHsfl7Pra8N5I5IjxbRf6GIq Mnzg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=ZxiI7aNf4MPsBPvgfy9JgBpDO30bdl/+v1RrtegkG4Y=; b=Kyr+KImvqrLOO0T5lQMSH8SV7eGHlv3oHimg6xf9U1MZUDXGOhunc1yBtCvZeT2iif b94GusXMtZyphWDjXSQM+r8u1C2vyZIrwbxzobhqKw4X0HXpAbbYAWNX0es5CCEaIWZd Mg42HtIEpVPJZ6HWvSGtLe3QkDVtNxnHDMX0ZBsuU4NbkrKY1UlpdeVcxH+LomQiA4qD Ctzb3Et7/kOLXAteSVJVoxjh+Bv5Jx+cjSOaQkKr0d24Qa03R3dN/xjfuYsxHiQXETn5 pkHvrheqMUsxo7k7hrcW0f2foaU4i547XXL4LGd6uzX/gxZ/k9adlJQyOudJSXGDPqJ6 KUJQ== X-Gm-Message-State: ABuFfohJ1H8YzX4gQ7q3n8m/uAYvNbmOtvwHXB7yeUFUzeb+6jxZA8+v tDD5qRjTSdmSSiPDMD/UEKY= X-Received: by 2002:a63:d84a:: with SMTP id k10-v6mr26232665pgj.314.1539097206854; Tue, 09 Oct 2018 08:00:06 -0700 (PDT) Received: from [192.168.88.43] (150.sub-166-148-115.myvzw.com. [166.148.115.150]) by smtp.gmail.com with ESMTPSA id 6-v6sm22705083pgl.6.2018.10.09.08.00.04 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 09 Oct 2018 08:00:06 -0700 (PDT) Subject: Re: general protection fault in __handle_mm_fault To: "Aneesh Kumar K.V" , Willem de Bruijn , syzbot+1577fbe983d20fe2e88f@syzkaller.appspotmail.com Cc: David Miller , Eric Dumazet , Alexey Kuznetsov , LKML , Network Development , syzkaller-bugs@googlegroups.com, Hideaki YOSHIFUJI , Andrew Morton , kirill.shutemov@linux.intel.com References: <0000000000009d47b2057782bab4@google.com> <87va6bwlfg.fsf@linux.ibm.com> From: Eric Dumazet Message-ID: <48d891dd-3f45-c03c-a55b-bb153080881a@gmail.com> Date: Tue, 9 Oct 2018 08:00:02 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <87va6bwlfg.fsf@linux.ibm.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/09/2018 01:53 AM, Aneesh Kumar K.V wrote: ... >>>> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13cdb67e400000 ... > > Can you check with this patch Well, this is a C repro, you can test this yourself instead of asking Willem who already did a painful bisection. Thanks.