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=-3.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,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 029A0C432BE for ; Fri, 6 Aug 2021 15:21:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C7E8B60F42 for ; Fri, 6 Aug 2021 15:21:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244285AbhHFPVb (ORCPT ); Fri, 6 Aug 2021 11:21:31 -0400 Received: from mail-il1-f198.google.com ([209.85.166.198]:33537 "EHLO mail-il1-f198.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232021AbhHFPVa (ORCPT ); Fri, 6 Aug 2021 11:21:30 -0400 Received: by mail-il1-f198.google.com with SMTP id i15-20020a92540f0000b0290222feb23cf5so1188817ilb.0 for ; Fri, 06 Aug 2021 08:21:15 -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=tu7Kevvl3zuTnuTFnD3tZ2U7expM8FEkIre095hhtro=; b=pntH3S40jiqOCOtPzGcWnvXAfSHMqlRvhbeVI4nTDdD3vBaUt4s4iTTQW+TG1lXDhF hpwuEhksmEcFYUxQPRF+RvpA6qcWO5R5PekFO5uVBKkz0E2jBrbaLPZfSX6Z0PUGZM58 V8qfTlsMJPSscrSB/ahU6nzGsy55dPXwXYl5CxZ38U/LhCZPuiGPyGD7ujAch4CDwOWW 2CHa09stWXhRp0E9amcA7d5YVoR2ttoFqQDIrhj48BioP9H7xZHSbW4/muLL8MingUkQ QaEFSPf0QZ3aUJR2tPJutm0R1cnUMWdgrzGnBPOkpPWo/PW3Ua6eZb2Pl27Miv+Mr4OX WGjg== X-Gm-Message-State: AOAM53287W+wicy2J0ueHNbgpoxubWln9VozzHA9DIUqF8m22AnYqqhX VzWe/v7Hbn3PVasdEitdEIVIi+DDiGpc2XNejiaHSpRuapVx X-Google-Smtp-Source: ABdhPJzRyaRqX3bqJM1PUFwXIk5cTd4rpXA8+uJtjupvW4ZoQyD7Kk3vsUjzUlKGyNdoAvTiT+iOT7Cnjbsxim5TH68BMhXjdPlN MIME-Version: 1.0 X-Received: by 2002:a05:6602:2f09:: with SMTP id q9mr1312428iow.196.1628263274697; Fri, 06 Aug 2021 08:21:14 -0700 (PDT) Date: Fri, 06 Aug 2021 08:21:14 -0700 In-Reply-To: <0000000000005225a605bd97fa64@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000016db0205c8e5967e@google.com> Subject: Re: [syzbot] WARNING in io_ring_exit_work From: syzbot To: asml.silence@gmail.com, axboe@kernel.dk, gregkh@linuxfoundation.org, hdanton@sina.com, io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, rafael@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot has bisected this issue to: commit 6c2450ae55656f6b0370bfd4cb52ec8a4ecd0916 Author: Pavel Begunkov Date: Tue Feb 23 12:40:22 2021 +0000 io_uring: allocate memory for overflowed CQEs bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=138a96e6300000 start commit: 8d4b477da1a8 Add linux-next specific files for 20210730 git tree: linux-next final oops: https://syzkaller.appspot.com/x/report.txt?x=104a96e6300000 console output: https://syzkaller.appspot.com/x/log.txt?x=178a96e6300000 kernel config: https://syzkaller.appspot.com/x/.config?x=4adf4987f875c210 dashboard link: https://syzkaller.appspot.com/bug?extid=00e15cda746c5bc70e24 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15d5cd96300000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1798471e300000 Reported-by: syzbot+00e15cda746c5bc70e24@syzkaller.appspotmail.com Fixes: 6c2450ae5565 ("io_uring: allocate memory for overflowed CQEs") For information about bisection process see: https://goo.gl/tpsmEJ#bisection