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[2620:137:e000::1:20]) by mx.google.com with ESMTP id 7-20020a170906208700b006df76385e2csi17645796ejq.716.2022.03.24.09.59.55; Thu, 24 Mar 2022 10:00:23 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240588AbiCVXkH (ORCPT + 99 others); Tue, 22 Mar 2022 19:40:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39404 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241008AbiCVXif (ORCPT ); Tue, 22 Mar 2022 19:38:35 -0400 Received: from mail-io1-f72.google.com (mail-io1-f72.google.com [209.85.166.72]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4B8FB61A1D for ; Tue, 22 Mar 2022 16:37:07 -0700 (PDT) Received: by mail-io1-f72.google.com with SMTP id g16-20020a05660226d000b00638d8e1828bso13432342ioo.13 for ; Tue, 22 Mar 2022 16:37:07 -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=nxTGya4rQb08tK4gHJKHSTw3wZe8r7lubNldP0E5UM0=; b=PQIK8mO5Tx0d8P7yxXme7Jo3+8VSBTmnPKwjLDBF++afWdy1K6aXDy1km/1eY8EyJf clgp+O8IWSiZL9CV/G5zmGg/jnrbA305vn5Fg+wU1A+T4zIt6NyzwgwtQko4L/6B0Pvj 6wnERLqZ/6DOjh4E8Dd0+LSLc+Y4uLV2b1V0Vp39EmoHYMA6YiCpBDM5Y+8VkuS9QZtY igBQz5G4bauBM2XzoToRsRpKtLAOAYA6eqkVgGRIa/JL6Tyh10xwdZcKgW71E+6ffGfC Dmw2PcfD9pl4760N6oNs5nJZr1dsYLRqiyISxZcAfhCPbjP1PF+bpTSkH72tqbjCmoxO 3MYw== X-Gm-Message-State: AOAM532mMInRY6ndbyz9RLBYEfMX49ztpWKlzgQKUp38I85O7jj6rIUM IyRD8L5JOJfQIMKVrKYDMDVLiQXZ4tJEbpFhS3Lrboas2Osp MIME-Version: 1.0 X-Received: by 2002:a92:6012:0:b0:2bd:fb5f:d627 with SMTP id u18-20020a926012000000b002bdfb5fd627mr13275273ilb.86.1647992226627; Tue, 22 Mar 2022 16:37:06 -0700 (PDT) Date: Tue, 22 Mar 2022 16:37:06 -0700 In-Reply-To: <00000000000012e22c05dacabb11@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000042c81b05dad717e6@google.com> Subject: Re: [syzbot] KASAN: use-after-free Read in add_wait_queue 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" X-Spam-Status: No, score=0.8 required=5.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2, SORTED_RECIPS,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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=1280c825700000 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=1180c825700000 console output: https://syzkaller.appspot.com/x/log.txt?x=1680c825700000 kernel config: https://syzkaller.appspot.com/x/.config?x=63af44f0631a5c3a dashboard link: https://syzkaller.appspot.com/bug?extid=950cee6d91e62329be2c syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14506ddb700000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=139b2093700000 Reported-by: syzbot+950cee6d91e62329be2c@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