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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2073BC433F5 for ; Sun, 31 Oct 2021 22:59:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 049DF60EBC for ; Sun, 31 Oct 2021 22:59:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230309AbhJaXBl (ORCPT ); Sun, 31 Oct 2021 19:01:41 -0400 Received: from mail-io1-f70.google.com ([209.85.166.70]:55078 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229982AbhJaXBi (ORCPT ); Sun, 31 Oct 2021 19:01:38 -0400 Received: by mail-io1-f70.google.com with SMTP id i8-20020a0566022c8800b005e187639aceso3032000iow.21 for ; Sun, 31 Oct 2021 15:59:06 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=zmKZGqzh8fouPbLaed+gBxcWLHzsUh8p7n964ZC6uwc=; b=SnrqIrlNZC3Q8GzYiTEuca4LoZOkHtFKBHvppDouZB7AybDQvntgTWdL7X/6iUREUJ OpiBkJJU1XYJI7MkmLYPu4eMDtAcyGxrY8LSfyichyNlMdbnpC+j0r7iId3DXzqbG0u7 TzrQWtc9jm3Rw9EgwB76OEmFpzcDexFfoJ+uOd/lskJdS8EjMN497i3e1/PADF3lgFiC 5+GPqc2vWkF4IPdgiPcIyJJwRxSYJsCHUHFcghNpCch9wScrKxgPqLr34GzfmGUoTBSZ UmRwjOOFRA7/4QlrfsAvFgrW0CBgieAPYx2f/vYdfKv0oxznMoRXB1v4i19Mj4yo1pPj ZS6A== X-Gm-Message-State: AOAM532jLPuvHak/IHYxJ0DYcjZrPRa6TjRRbABg+f+KAM3tbEHs3o4S PHtQk0ZF0wofg601lg7nQKWnP4eBe8ilnbpLZraUZLksnSg7 X-Google-Smtp-Source: ABdhPJywbfOpwWGX+8twysh9JnZdNyAmjt8vM3QTfSudoVwDDOBb7qmmPAVA7hKN+so8+5aTSnSyrEftThdLX7EqHh1cLqN9uIid MIME-Version: 1.0 X-Received: by 2002:a05:6638:d53:: with SMTP id d19mr18923597jak.123.1635721146351; Sun, 31 Oct 2021 15:59:06 -0700 (PDT) Date: Sun, 31 Oct 2021 15:59:06 -0700 In-Reply-To: <000000000000fba7bd05cf7eb8f5@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000e143c505cfae0138@google.com> Subject: Re: [syzbot] KASAN: use-after-free Write in __io_free_req From: syzbot To: asml.silence@gmail.com, axboe@kernel.dk, io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, xiaoguang.wang@linux.alibaba.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 34ced75ca1f63fac6148497971212583aa0f7a87 Author: Xiaoguang Wang Date: Mon Oct 25 05:38:48 2021 +0000 io_uring: reduce frequent add_wait_queue() overhead for multi-shot poll request bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=14f83bbab00000 start commit: bdcc9f6a5682 Add linux-next specific files for 20211029 git tree: linux-next final oops: https://syzkaller.appspot.com/x/report.txt?x=16f83bbab00000 console output: https://syzkaller.appspot.com/x/log.txt?x=12f83bbab00000 kernel config: https://syzkaller.appspot.com/x/.config?x=cea91ee10b0cd274 dashboard link: https://syzkaller.appspot.com/bug?extid=78b76ebc91042904f34e syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10cf03e2b00000 Reported-by: syzbot+78b76ebc91042904f34e@syzkaller.appspotmail.com Fixes: 34ced75ca1f6 ("io_uring: reduce frequent add_wait_queue() overhead for multi-shot poll request") For information about bisection process see: https://goo.gl/tpsmEJ#bisection