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, URIBL_BLOCKED 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 2975AC4338F for ; Fri, 6 Aug 2021 15:21:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F3CB161158 for ; Fri, 6 Aug 2021 15:21:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244153AbhHFPVb (ORCPT ); Fri, 6 Aug 2021 11:21:31 -0400 Received: from mail-il1-f199.google.com ([209.85.166.199]:44906 "EHLO mail-il1-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244128AbhHFPVa (ORCPT ); Fri, 6 Aug 2021 11:21:30 -0400 Received: by mail-il1-f199.google.com with SMTP id m12-20020a056e021c2cb029022262095ea1so4753569ilh.11 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=UAW8t3VIDeGSkjdw9cLRNKfCSq8q+g4zyFDqF7/+MLz1uaN0F/V/X7eNLVNIxFCRhK ZwonepSnsVryhnYcuRiQabZlu8UAo7BgQkrcKvlBvz+BKrVmDL/4B+zFKpcOpgxaoRdI GLS+LvLODPT0SiDqDc8yucfGzdPOb+FQLOblz2Mo2CXCdw/ATD7h+41YAr9e2Swm7T9X YA7Vzd3L9SX1eAinysxLyibLddbFxDVjfA93U8+5OciQKQrweBLAYFOESGvQFcFBmKDg yT76ju2kdhNXfBN5jt656rKb9dINKYWedgb7mR8QIPSEHZykTfVVj5e/yCKumW0Y56F8 n1Pw== X-Gm-Message-State: AOAM531s2r9BUlhtfd5zyc3rso89oDxASqjUhXMbL/g09OtGX/21BIYf uI10EInlsWC8NfgAq9i0mJ4soMXrj6/qm1UCCa3qwUIyze5x 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: io-uring@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