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[147.75.80.249]) by mx.google.com with ESMTPS id 4fb4d7f45d1cf-5733c2d5660si2753989a12.292.2024.05.10.22.59.39 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 10 May 2024 22:59:39 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel+bounces-176428-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.80.249 as permitted sender) client-ip=147.75.80.249; Authentication-Results: mx.google.com; arc=pass (i=1 spf=pass spfdomain=i-love.sakura.ne.jp); spf=pass (google.com: domain of linux-kernel+bounces-176428-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.80.249 as permitted sender) smtp.mailfrom="linux-kernel+bounces-176428-linux.lists.archive=gmail.com@vger.kernel.org" Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by am.mirrors.kernel.org (Postfix) with ESMTPS id 0695E1F22FAB for ; Sat, 11 May 2024 05:59:39 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 6E42F4D5B0; Sat, 11 May 2024 05:59:30 +0000 (UTC) Received: from www262.sakura.ne.jp (www262.sakura.ne.jp [202.181.97.72]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9C3FB2CCBE; Sat, 11 May 2024 05:59:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=202.181.97.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715407170; cv=none; b=rbiKzs+Dpus6NkyxjSiORX2OT0EmWvVCSeDh+ltKJQuNF3OsGXQgjke8aPzhbnyAYMOm6P8xeMpOlYTR8e5+T4sX8jE0DmjRp5gC6rNWIc/d31+3D9llKjCjrOuyA51robTuoWZIW45GQO0ulIF1IGLNboNpP6byGvEdl3pCrP0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715407170; c=relaxed/simple; bh=aVz2QS/W96fRfktT31yMRKLmBl2zY1lLn7nz3B6/dC8=; h=Message-ID:Date:MIME-Version:Subject:To:References:From: In-Reply-To:Content-Type; b=UVEbK36kpFfndBRWElCyM/wlSQizmyNCsmEafWogNS+AyJueTebSpqVlHclgdJR16kGfIdIR0BKWel0JWtdT/4M/F/RwqJvzYFfYoYi8oOxotk/ibKzsVZ3CRUbUJnfVN6gc8SZFMe0+35CJmhELZt0A3uk2WZmCdsTLFzFXqEA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=I-love.SAKURA.ne.jp; spf=pass smtp.mailfrom=I-love.SAKURA.ne.jp; arc=none smtp.client-ip=202.181.97.72 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=I-love.SAKURA.ne.jp Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=I-love.SAKURA.ne.jp Received: from fsav411.sakura.ne.jp (fsav411.sakura.ne.jp [133.242.250.110]) by www262.sakura.ne.jp (8.15.2/8.15.2) with ESMTP id 44B5wRtv091972; Sat, 11 May 2024 14:58:27 +0900 (JST) (envelope-from penguin-kernel@I-love.SAKURA.ne.jp) Received: from www262.sakura.ne.jp (202.181.97.72) by fsav411.sakura.ne.jp (F-Secure/fsigk_smtp/550/fsav411.sakura.ne.jp); Sat, 11 May 2024 14:58:27 +0900 (JST) X-Virus-Status: clean(F-Secure/fsigk_smtp/550/fsav411.sakura.ne.jp) Received: from [192.168.1.6] (M106072142033.v4.enabler.ne.jp [106.72.142.33]) (authenticated bits=0) by www262.sakura.ne.jp (8.15.2/8.15.2) with ESMTPSA id 44B5wQwO091968 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NO); Sat, 11 May 2024 14:58:26 +0900 (JST) (envelope-from penguin-kernel@I-love.SAKURA.ne.jp) Message-ID: Date: Sat, 11 May 2024 14:58:27 +0900 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [syzbot] [bpf?] [net?] possible deadlock in __lock_task_sighand (2) To: syzbot , andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, eddyz87@gmail.com, edumazet@google.com, haoluo@google.com, jakub@cloudflare.com, john.fastabend@gmail.com, jolsa@kernel.org, kpsingh@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, martin.lau@linux.dev, netdev@vger.kernel.org, pabeni@redhat.com, sdf@google.com, song@kernel.org, syzkaller-bugs@googlegroups.com, yonghong.song@linux.dev References: <000000000000fafd5b06182712ca@google.com> Content-Language: en-US From: Tetsuo Handa In-Reply-To: <000000000000fafd5b06182712ca@google.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit This bug report has fix commit but syzbot found a reproducer with that fix commit applied. That is, something is still wrong. Any comments from BPF people on https://lkml.kernel.org/r/8dc01a83-1bea-4e3c-a04d-9a9bd422a5b3@I-love.SAKURA.ne.jp ? On 2024/05/11 14:39, syzbot wrote: > syzbot has found a reproducer for the following issue on: > > HEAD commit: 3e9bc0472b91 Merge branch 'bpf: Add BPF_PROG_TYPE_CGROUP_S.. > git tree: bpf > console+strace: https://syzkaller.appspot.com/x/log.txt?x=1372d16c980000 > kernel config: https://syzkaller.appspot.com/x/.config?x=98d5a8e00ed1044a > dashboard link: https://syzkaller.appspot.com/bug?extid=34267210261c2cbba2da > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=116aa704980000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10be0fb8980000