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=-16.4 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_IN_DEF_DKIM_WL autolearn=ham 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 B4001C5517A for ; Wed, 11 Nov 2020 13:31:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 564322074B for ; Wed, 11 Nov 2020 13:31:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="lmZfYSKk" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726216AbgKKNbF (ORCPT ); Wed, 11 Nov 2020 08:31:05 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53530 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726101AbgKKNbE (ORCPT ); Wed, 11 Nov 2020 08:31:04 -0500 Received: from mail-qt1-x842.google.com (mail-qt1-x842.google.com [IPv6:2607:f8b0:4864:20::842]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6ECAEC0613D4 for ; Wed, 11 Nov 2020 05:31:04 -0800 (PST) Received: by mail-qt1-x842.google.com with SMTP id b16so993767qtb.6 for ; Wed, 11 Nov 2020 05:31:04 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=bt7KK3+6FBeKnmbngl2aQPxELz+xreb5TfjkrECem4g=; b=lmZfYSKk7jOB4MzdaSfM2mgwqqvFcDhTsEOerCxu1GBckK75+PpPU9f4UxcaqCuk3W pQZngJ6CDTTpT5jXFKl+GB1EahkbeLRD1TLwYzF2LsKeuxc9T8Uha78Rdw9w1sIm1999 xaBXda5NXvjOV+intCXhHnGVF7tUPLt1AWD2xdL+YLO7REgHiiYlYh8JKSZfjzjHGIxm 0S2c8dUb4Oj1f9VSGwiqonO6g615ZjhlRFKgnb+ZxsNTXKRrl7T1sk4ohTaf+eJe7Mv2 CY7/2zL309yCXQeJXqfm3hvND7PHb53Qld8ZRPnVj3q6XpL4o4bJxPCwXroyJhyCzBnx 0g4w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=bt7KK3+6FBeKnmbngl2aQPxELz+xreb5TfjkrECem4g=; b=JWE9zaU+c2xHTx+jtLDef8Rh+O6kKwNmDY/UkMKKoHqs4pzckK7wrCaI3sseJXp2ZR 9PdqdzwgNDcqJnyAemyjzzNEWTnoYBYwD2LTI7DqI8T63ZhMZ/J3GAwSFbyAtUx3i1YC k/7Dohx5YcLOsv8GimfmDQO4ttRuA8FG+OqxdozDb+0YarY8yBIAc3L10I0RdVvWSai9 yW4NmL7tnmC46r43yUckGk9uVpvdU1/nrnkHfdj73kz+HsCbaLoKtaL2KR2TnoGT7JtI 13L2rM2S7T6KtSmm2SrOjpgD0/FFLctNYn2jZHwhJaIm2Q9k5Jas+eIcyfo0zp+BOODe dWZQ== X-Gm-Message-State: AOAM532hgFyeejNM7UDo6QqMHRCC+StQJ+ePM3hqQsr/LdQeYwyhlkTt gkum7KFvLBQGI30H3AbH0NVaP2AVubJ7DjCqU138WYKymxFbHLno X-Google-Smtp-Source: ABdhPJyRCZFa3UmFUtcfYdkdGN6GURhyTgbzlysV/UeEWVPHTmgAjre92EHBLNtxk5EL33HIh93Up8R411fdGzeSRpg= X-Received: by 2002:ac8:37f2:: with SMTP id e47mr23137052qtc.290.1605101463414; Wed, 11 Nov 2020 05:31:03 -0800 (PST) MIME-Version: 1.0 References: <000000000000b09d8c059a3240be@google.com> <00000000000036d7e005b3cc1e79@google.com> In-Reply-To: <00000000000036d7e005b3cc1e79@google.com> From: Dmitry Vyukov Date: Wed, 11 Nov 2020 14:30:52 +0100 Message-ID: Subject: Re: WARNING in percpu_ref_exit (2) To: syzbot , io-uring@vger.kernel.org, LKML , syzkaller-bugs Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org On Wed, Nov 11, 2020 at 4:09 AM syzbot wrote: > > syzbot suspects this issue was fixed by commit: > > commit c1e2148f8ecb26863b899d402a823dab8e26efd1 > Author: Jens Axboe > Date: Wed Mar 4 14:25:50 2020 +0000 > > io_uring: free fixed_file_data after RCU grace period > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=161ea46e500000 > start commit: 63849c8f Merge tag 'linux-kselftest-5.6-rc5' of git://git... > git tree: upstream > kernel config: https://syzkaller.appspot.com/x/.config?x=4527d1e2fb19fd5c > dashboard link: https://syzkaller.appspot.com/bug?extid=8c4a14856e657b43487c > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13c30061e00000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1251b731e00000 > > If the result looks correct, please mark the issue as fixed by replying with: > > #syz fix: io_uring: free fixed_file_data after RCU grace period > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection #syz fix: io_uring: free fixed_file_data after RCU grace period