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[2604:1380:45d1:ec00::1]) by mx.google.com with ESMTPS id pt17-20020a056214049100b0069b4d64ab0asi6510737qvb.339.2024.04.20.07.51.47 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 20 Apr 2024 07:51:48 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel+bounces-152302-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45d1:ec00::1 as permitted sender) client-ip=2604:1380:45d1:ec00::1; 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-152302-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45d1:ec00::1 as permitted sender) smtp.mailfrom="linux-kernel+bounces-152302-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 ny.mirrors.kernel.org (Postfix) with ESMTPS id C08891C20A15 for ; Sat, 20 Apr 2024 14:51:47 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 2FA4027471; Sat, 20 Apr 2024 14:51:42 +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 499FF10A31 for ; Sat, 20 Apr 2024 14:51:39 +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=1713624701; cv=none; b=H/XeBIt6lQxaVNLY1rsduOxIdcIfrZ1YXl4EqSa1YbZwOy+p/5dY8HH+AGAjbLBHgYakP+fcsqax+5DVbw7ca4nPo03P3xfeCw2v3RYUE9DzPIImoafGVWoZiU5JfSsrE+dp+h6Ell3oTeGP4/f8w55aX7Yi6DydX2vPs+BLpWM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713624701; c=relaxed/simple; bh=MrauLE7vTIJ56o0G5yI1/rmSGSVS4GvOYwtIC8oySNA=; h=Message-ID:Date:MIME-Version:Subject:To:References:From: In-Reply-To:Content-Type; b=JKyQhvnIaDHnyYQ813/GhmjHgXkTAraD3WAqckpMlKag5WMCS+zxxfcE2jyZRHeGat4M0vOKf+I2FXa3EyLV71jaAO1/33jF0hT+CPVzUsi7EFSyqYTfh3T+XASBp36tfG2updZ248FBwMPCRukonc2NbKNVAJJxNwHI/D0uHBc= 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 fsav112.sakura.ne.jp (fsav112.sakura.ne.jp [27.133.134.239]) by www262.sakura.ne.jp (8.15.2/8.15.2) with ESMTP id 43KEpZ0G037307; Sat, 20 Apr 2024 23:51:35 +0900 (JST) (envelope-from penguin-kernel@I-love.SAKURA.ne.jp) Received: from www262.sakura.ne.jp (202.181.97.72) by fsav112.sakura.ne.jp (F-Secure/fsigk_smtp/550/fsav112.sakura.ne.jp); Sat, 20 Apr 2024 23:51:35 +0900 (JST) X-Virus-Status: clean(F-Secure/fsigk_smtp/550/fsav112.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 43KEpYVq037304 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NO); Sat, 20 Apr 2024 23:51:35 +0900 (JST) (envelope-from penguin-kernel@I-love.SAKURA.ne.jp) Message-ID: <98e6ba67-57b7-49ef-907b-67d1e22f6547@I-love.SAKURA.ne.jp> Date: Sat, 20 Apr 2024 23:51:34 +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 rcu_report_exp_cpu_mult To: syzbot , linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com References: <000000000000dc9aca0613ec855c@google.com> Content-Language: en-US From: Tetsuo Handa In-Reply-To: <000000000000dc9aca0613ec855c@google.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit #syz fix: bpf, sockmap: Prevent lock inversion deadlock in map delete elem