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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E9391C433EF for ; Wed, 23 Mar 2022 03:25:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239411AbiCWD0n (ORCPT ); Tue, 22 Mar 2022 23:26:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58618 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240832AbiCWD0m (ORCPT ); Tue, 22 Mar 2022 23:26:42 -0400 Received: from mail-io1-f70.google.com (mail-io1-f70.google.com [209.85.166.70]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A3FCF70915 for ; Tue, 22 Mar 2022 20:25:13 -0700 (PDT) Received: by mail-io1-f70.google.com with SMTP id u25-20020a5d8199000000b006421bd641bbso225218ion.11 for ; Tue, 22 Mar 2022 20:25:13 -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=4vGMEtGe+BbLjSVih08yohBtZCRt30b9qlDbMhfTRl0=; b=lRTwLrdOzoCyNxVgP8LlxLn5x3Mio3FEVv3rGa04ws/bLlqW6c59ciVCjSdYmeSw4/ PqVFRX8JCfWm5dXrQrV767Tx1wCLCsMLX4Dc9cTTLomTys1aF/XTwNkKGARjNBErIbQ8 DKZD5OJAzv9f1JFeQoIeDdQt8jxt9mxGyrd3u+HTr9J8A1l8hRTtmnjcuutkDcxr388h QlQbQ/K6RI1VlQh2YpF2HFglW9hqxTo+zOLzKPk0gshWx4E2zNpOL32yxGxTj8U5XbdH crs4es8PxSchjlAFVK7UsWEfAll5ax7KtNxsoVTYqDULi2upnfkaFC/yj/2rcsJABV+q Js6A== X-Gm-Message-State: AOAM5321hl3QqThu916t1Cv0YOEGVjX8FyehWXjr6p4EtoBpwoytY+Ap h9dvRDabOehV89ptuTEHTjFm3QVsQU0IGAi7xyg5nnOzbLPU X-Google-Smtp-Source: ABdhPJxPmD1OSkA0wPsjR1WGTpH4zf9ZPV9c193YS4y2yCDtYsvVjxIthOQverrG4KJLyuKRpk3Ekb1prWTDh8ldMR24rIqhrGbr MIME-Version: 1.0 X-Received: by 2002:a5d:8714:0:b0:636:13bb:bc89 with SMTP id u20-20020a5d8714000000b0063613bbbc89mr14075565iom.126.1648005913000; Tue, 22 Mar 2022 20:25:13 -0700 (PDT) Date: Tue, 22 Mar 2022 20:25:12 -0700 In-Reply-To: <0000000000000f361d05dacabb09@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000008409805dada47ce@google.com> Subject: Re: [syzbot] KASAN: use-after-free Read in io_poll_remove_entries From: syzbot To: asml.silence@gmail.com, axboe@kernel.dk, gregkh@linuxfoundation.org, io-uring@vger.kernel.org, jirislaby@kernel.org, linux-kernel@vger.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 91eac1c69c202d9dad8bf717ae5b92db70bfe5cf Author: Jens Axboe Date: Wed Mar 16 22:59:10 2022 +0000 io_uring: cache poll/double-poll state with a request flag bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=11819d0b700000 start commit: b47d5a4f6b8d Merge tag 'audit-pr-20220321' of git://git.ke.. git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=13819d0b700000 console output: https://syzkaller.appspot.com/x/log.txt?x=15819d0b700000 kernel config: https://syzkaller.appspot.com/x/.config?x=c44f0c051803a0ae dashboard link: https://syzkaller.appspot.com/bug?extid=cd301bb6523ea8cc8ca2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=150525ed700000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10d08625700000 Reported-by: syzbot+cd301bb6523ea8cc8ca2@syzkaller.appspotmail.com Fixes: 91eac1c69c20 ("io_uring: cache poll/double-poll state with a request flag") For information about bisection process see: https://goo.gl/tpsmEJ#bisection