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=-5.7 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 8477AC10F00 for ; Wed, 27 Mar 2019 15:18:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5E8A72146F for ; Wed, 27 Mar 2019 15:18:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729445AbfC0PSC (ORCPT ); Wed, 27 Mar 2019 11:18:02 -0400 Received: from mail-io1-f70.google.com ([209.85.166.70]:42630 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728076AbfC0PSC (ORCPT ); Wed, 27 Mar 2019 11:18:02 -0400 Received: by mail-io1-f70.google.com with SMTP id i1so13348849ioq.9 for ; Wed, 27 Mar 2019 08:18:02 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=gRTWyAht0d0WL/ebEkUSaYWoBqNTnoVEKA+EwcfXXyQ=; b=dGXUg+FnRt4wprQX7kmRPG7XRaxNYRr8ho5OkqvHD1mYZn9VofXwZxQFZb5vFYD62H OTAoSnLkR58e9cBqSTCd8Fms4IkulDLJ5GEqEOwRsDJO8c6wYdynaw5zSiBKYHD6FE4q e4PQXvPyJoxoVqmFcNXtM6xPNF4dkDZgjgCJKRS4NXWPfA2Qn6Y3j6LIhySOidQaEBH0 Ypx+D4CGQ7Sa4wa4hZluw9WpaW9sIdOHd4jUfRnKMkNpMc/Mq740JuObJrV2+M6B2Cc0 Uu70EnXCmPkT0BAEAQA87piL9iti9D/wqvVFUDSlV4NhbL9OO+G4wXT8okyW5PbWw3mB bcpw== X-Gm-Message-State: APjAAAVb3M+/snI+jfYqPqHP0yL+VfqE92YgYpgO9JL2dXZzZZxTYN2D u1r6dvfRjbywCurZKxYgJWPE6tDoU4fZOCbSV574wJkSHWWy X-Google-Smtp-Source: APXvYqxSv0nfF3Eyfafo8C2XuPD3N2H1QtondQuZ1Htz7OCxMn8QKWDH0PD1CQ7JLQ4GWxgzdrIVQo6Wpzt5pVRHU+N7KmElQe6w MIME-Version: 1.0 X-Received: by 2002:a24:4c82:: with SMTP id a124mr841689itb.26.1553699881562; Wed, 27 Mar 2019 08:18:01 -0700 (PDT) Date: Wed, 27 Mar 2019 08:18:01 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000008738e9058514f19c@google.com> Subject: Re: possible deadlock in acct_pin_kill From: syzbot To: akpm@linux-foundation.org, amir73il@gmail.com, gregkh@linuxfoundation.org, kstewart@linuxfoundation.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, mark.rutland@arm.com, mszeredi@redhat.com, oleg@redhat.com, paulmck@linux.vnet.ibm.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Hello, syzbot has tested the proposed patch and the reproducer did not trigger crash: Reported-and-tested-by: syzbot+2a73a6ea9507b7112141@syzkaller.appspotmail.com Tested on: commit: 6c66f635 kernel/acct.c: fix locking order when switching a.. git tree: https://github.com/amir73il/linux.git acct_pin_kill_deadlock kernel config: https://syzkaller.appspot.com/x/.config?x=bd771c0a1616f2b7 compiler: gcc (GCC) 9.0.0 20181231 (experimental) Note: testing is done by a robot and is best-effort only.