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 6F385C76196 for ; Thu, 23 Mar 2023 07:50:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231314AbjCWHub (ORCPT ); Thu, 23 Mar 2023 03:50:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43876 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231211AbjCWHu1 (ORCPT ); Thu, 23 Mar 2023 03:50:27 -0400 Received: from mail-lf1-x130.google.com (mail-lf1-x130.google.com [IPv6:2a00:1450:4864:20::130]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 494A51B565 for ; Thu, 23 Mar 2023 00:50:24 -0700 (PDT) Received: by mail-lf1-x130.google.com with SMTP id k37so13629043lfv.0 for ; Thu, 23 Mar 2023 00:50:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; t=1679557822; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=IlLAgQAMrY+Qapa3HyIEMrrk5zkFmAKmKhKxYGqlRfA=; b=X2pZvw8F39X1gqKZVD2n/DZSu2hANXRU4xGF6wdBeoJrF60vbYwLuvWcCYMSoO2/cG WvIgjsqj11antMece7AYvd1g6iaS1ccg/JUzkslCbjCmGTVF4r6gOBb+PcH5ERzCwtgz MWTPXJ8Dh5ucwqM4NrcyqgBdQwvpqE7zdKxsAyzxmZJ6smmqAOAGJ/pPCGfonij0pYoS 3uAB9OgAnYlWap7grV8I3amlHxJFJOF56WnlVnyGXJvAAky6axmybPjLu/tXYwyQvFuH 51bA0q7T953hvaeB6RVCPY8ZUbbA2KiLTIwfwrbhoBzuHYcI+ELJWjqlMGe6CAuk7raF +ucQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1679557822; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=IlLAgQAMrY+Qapa3HyIEMrrk5zkFmAKmKhKxYGqlRfA=; b=zYLl78BBbhIQbGl2WHBbKn7eOahz2tNIuujMx3mw8Z2375d748IFCGXaVpotrMr3Vg VIIxD0j16nK47ZA1eBugvW4XRWGT82Cz0ia4wMQO/H3H10EqNo120OrVkpWz4BW3QY31 rmT1CJBlx0pYv5xB+H+0sYd3+R1PYzQ/6397tD5qhr8tjuK4M8EObtckqx0Z3uj4Ucl/ 7gO47pC9Ajmw7+rWEwoDZLAKDYUso0zNbz7EOHW+HaNadtuP9uVWbo/ACNKZEKR8zzJm 8hIPse6offNUI31JrlLc+1DSOiY/UCW3iWWkF96NpGqpy+DzQa79eMcUd2EQo6Auf9d/ 9F9g== X-Gm-Message-State: AO0yUKXwR9csd0QERxXVPXQnSgb+7rbmHLaJMEZXNGOVGmq+7tO5i4lA RtQertkMBsflLl13LT7dQIe84o18EdyOHYFChoESew== X-Google-Smtp-Source: AK7set+AZnZ7RpTuuN1sbeWai2Zv6NPiiOXrLxauD56bQOThNui9RIOxVfAjNA3Zd4PBGiqVBF7PkHS6aCBTMvredJo= X-Received: by 2002:ac2:5607:0:b0:4dc:807a:d147 with SMTP id v7-20020ac25607000000b004dc807ad147mr2820080lfd.6.1679557822371; Thu, 23 Mar 2023 00:50:22 -0700 (PDT) MIME-Version: 1.0 References: <0000000000006294c805e106db34@google.com> <000000000000690cbc05f779cba8@google.com> In-Reply-To: <000000000000690cbc05f779cba8@google.com> From: Dmitry Vyukov Date: Thu, 23 Mar 2023 08:50:10 +0100 Message-ID: Subject: Re: [syzbot] [bpf?] [trace?] possible deadlock in bpf_trace_printk To: syzbot Cc: andrii@kernel.org, ast@kernel.org, boqun.feng@gmail.com, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, fgheet255t@gmail.com, haoluo@google.com, hawk@kernel.org, hdanton@sina.com, john.fastabend@gmail.com, jolsa@kernel.org, kafai@fb.com, kpsingh@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, longman@redhat.com, martin.lau@linux.dev, mingo@redhat.com, netdev@vger.kernel.org, peterz@infradead.org, rostedt@goodmis.org, sdf@google.com, song@kernel.org, songliubraving@fb.com, syzkaller-bugs@googlegroups.com, will@kernel.org, yhs@fb.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 22 Mar 2023 at 10:29, syzbot wrote: > > syzbot suspects this issue was fixed by commit: > > commit 05b24ff9b2cfabfcfd951daaa915a036ab53c9e1 > Author: Jiri Olsa > Date: Fri Sep 16 07:19:14 2022 +0000 > > bpf: Prevent bpf program recursion for raw tracepoint probes > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=10a653d6c80000 > start commit: a335366bad13 Merge tag 'gpio-fixes-for-v6.0-rc6' of git://.. > git tree: upstream > kernel config: https://syzkaller.appspot.com/x/.config?x=9e66520f224211a2 > dashboard link: https://syzkaller.appspot.com/bug?extid=c49e17557ddb5725583d > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16e27480880000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12737fbf080000 > > If the result looks correct, please mark the issue as fixed by replying with: > > #syz fix: bpf: Prevent bpf program recursion for raw tracepoint probes > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection Looks reasonable: #syz fix: bpf: Prevent bpf program recursion for raw tracepoint probes