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 DDF8CC388F9 for ; Wed, 11 Nov 2020 11:49:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E0491206FB for ; Wed, 11 Nov 2020 11:49:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="Z8qMlOlz" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726367AbgKKLtz (ORCPT ); Wed, 11 Nov 2020 06:49:55 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37790 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725860AbgKKLto (ORCPT ); Wed, 11 Nov 2020 06:49:44 -0500 Received: from mail-qk1-x744.google.com (mail-qk1-x744.google.com [IPv6:2607:f8b0:4864:20::744]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6CF49C0613D1 for ; Wed, 11 Nov 2020 03:49:44 -0800 (PST) Received: by mail-qk1-x744.google.com with SMTP id n132so1345759qke.1 for ; Wed, 11 Nov 2020 03:49:44 -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=9pawpngbrgzwBTZ9koabDZVAC9jv4KPdgxMf4ukZapA=; b=Z8qMlOlzJgJLMoT9qaVAWVoZc3pvU3DlOU78YER5Y1BdMQr/Ysk4F412OB8hVwn+yp 2MDfYFZZuL8ylL6baZLKRVvTyJCwWEQuaXLMPAhucdqF3LQKqCiulNWDwWXvJnrzoDpK BdGoopd1/7KEpP6PfZEjRfQ5fSNAqWLh2dcZMjKPljdOifGD5bTVjpBkERL4C/rpoAuG QDAgHJgkEhpiwtpyFaOggJJrD5jNatH7K74vb92PHwiacATSjaLKD+gaxDVyFMzGD24e IVKzZO1xVAGR6XX2ffkFkMBhgUmvd/fYpLwXSxXYu83ss+ZgiGKpF8d4sKZdtu13+Gtb zRuA== 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=9pawpngbrgzwBTZ9koabDZVAC9jv4KPdgxMf4ukZapA=; b=r2s1aKWPMLHFSz8t9nOZAK2nBXoQdcbNwyhmh5J8wa34hmYW4oKD+dPdIxSIL35/JS IBoz4KUPRUbJoM+NviBRKJsgyqT+1kXiKeiVWMJPUTZvZTHcDAoYArUwHmA3PYwLvLRr w3ex9k3VMdWdoZKctBeIzx+mioIum8MWVyX6BLZGa0vugo7MHBjqErOvWCrzkCNXazNb wOy52gKQb6+wp66GoEpK/8cyg3iEGjobrYi13yIkM5XOSa3TaRdz2mpR3OUpbLUsHvwL 7Jo/wFc4Kol+RbRdTr32FL4jnYzGz7nnPYdfTUUlpCIQtqYBzXp2mj1z5wjdLAZYucF7 IA7A== X-Gm-Message-State: AOAM533CGXChCoFFBjIL3sN6cSeqHT+z4a9+09MK+q8wPF+zRzaAky8k 7TuNcuS+9vt07BcvLRww+6R40tYhWWFPCIPaZjzRdw== X-Google-Smtp-Source: ABdhPJy7EiDHSGrXx8yLuynkl4A0xn5akOI/uotPr4UqXn7TciV8OV3mAD87s+bo8NFv9M61JN5dCSXRFGSwEAEoST0= X-Received: by 2002:a37:9747:: with SMTP id z68mr23549365qkd.424.1605095383475; Wed, 11 Nov 2020 03:49:43 -0800 (PST) MIME-Version: 1.0 References: <000000000000add83505a8e38c4c@google.com> <0000000000006f439b05b241c3c5@google.com> In-Reply-To: <0000000000006f439b05b241c3c5@google.com> From: Dmitry Vyukov Date: Wed, 11 Nov 2020 12:49:32 +0100 Message-ID: Subject: Re: WARNING: suspicious RCU usage in ctrl_cmd_new_lookup To: syzbot , syzkaller-bugs , LKML Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Oct 22, 2020 at 2:40 PM syzbot wrote: > > syzbot suspects this issue was fixed by commit: > > commit a7809ff90ce6c48598d3c4ab54eb599bec1e9c42 > Author: Manivannan Sadhasivam > Date: Sat Sep 26 16:56:25 2020 +0000 > > net: qrtr: ns: Protect radix_tree_deref_slot() using rcu read locks > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=143867c8500000 > start commit: 7ae77150 Merge tag 'powerpc-5.8-1' of git://git.kernel.org.. > git tree: upstream > kernel config: https://syzkaller.appspot.com/x/.config?x=d195fe572fb15312 > dashboard link: https://syzkaller.appspot.com/bug?extid=3025b9294f8cb0ede850 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11802cf9100000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=144acc03100000 > > If the result looks correct, please mark the issue as fixed by replying with: > > #syz fix: net: qrtr: ns: Protect radix_tree_deref_slot() using rcu read locks > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection #syz fix: net: qrtr: ns: Protect radix_tree_deref_slot() using rcu read locks