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[2620:137:e000::1:20]) by mx.google.com with ESMTP id bk34-20020a0568081a2200b002ef0c347584si14361202oib.4.2022.03.28.13.27.55; Mon, 28 Mar 2022 13:28:08 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20210112 header.b=IMdm7fMd; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239892AbiC1Jk3 (ORCPT + 99 others); Mon, 28 Mar 2022 05:40:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46252 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233254AbiC1Jk0 (ORCPT ); Mon, 28 Mar 2022 05:40:26 -0400 Received: from mail-pl1-x636.google.com (mail-pl1-x636.google.com [IPv6:2607:f8b0:4864:20::636]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E726913D47; Mon, 28 Mar 2022 02:38:46 -0700 (PDT) Received: by mail-pl1-x636.google.com with SMTP id f10so3968798plr.6; Mon, 28 Mar 2022 02:38:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=kSPMoIuWL9FXjN+mAnYdY25Lo8PRjU76MHfmUpfVXVs=; b=IMdm7fMd88UVnKMkI1wdPkZmSds+d4Fbesv2Y+svsa/iljkTo4Hi0a6KHzYFxgZMTm kib/TKA8jXbtcC/D57pLvWgWyibonGcfANHOR0JLTgFReatfDNer6C3iRIZ9E+w6IwRQ O9O6vC7ZF1mIvkzeEmWPlmBhuDG4T0BH0siMhij+0nBrM3SIvGNE5J6zikfaWdzdEpln PXneyfQIcBLijbiiNCbrkpuRhmZdLlb+/j1BdnJypfSSwXyjUaCcINgZVb/OgKue87/q BPipgM0fjt1GYeuqlrBZ97UG8gxRuf9IC3nEUgIAwiPF5v3W0DVuyqduoxzMEEnKtpZV 6bxw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=kSPMoIuWL9FXjN+mAnYdY25Lo8PRjU76MHfmUpfVXVs=; b=KWFji7RYNTzoEUEpxrockicQkc8368IOgL557K+oUkbNYfZP6SEHTBeRBXQM3nAgtl F1PxX1Qyw+wz6YOJCT7eQ+kYgI6YAFntJ/tlN6TW05EyHHB0PbIk/79ZRvUSMWbJkn5R +3fAWB8LZ70MFYpH0HrvqRB1HY9OwI+eqjeuTl3xBkrNmFguJ5VlsZesWSNrnrA2X4cx +FlxlR0WHJbZ1id5O6Pzc6ki2/b+3EybonnwCm7OaX/dxEqkK85/ZlVh5T6CnQeAVaHK 6ST2LOYqVa5M3BcqGQg2jJ3P7nM6mrnbaFU2lsJRn8hh1XuhSto2X1DeXyrB98dS6OVr DdoA== X-Gm-Message-State: AOAM531fe3Chiq+oAPSAyfqFVLMCpJFnbonxWxEhwtTcvef59XaxI0Ty AKMbq8flAwMSd9W2+Ibb+eQ= X-Received: by 2002:a17:902:f54f:b0:154:5686:7616 with SMTP id h15-20020a170902f54f00b0015456867616mr24668500plf.125.1648460326246; Mon, 28 Mar 2022 02:38:46 -0700 (PDT) Received: from ubuntu.huawei.com ([119.3.119.18]) by smtp.googlemail.com with ESMTPSA id y12-20020a17090a784c00b001c6bdafc995sm17230900pjl.3.2022.03.28.02.38.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Mar 2022 02:38:45 -0700 (PDT) From: Xiaomeng Tong To: svens@linux.ibm.com Cc: agordeev@linux.ibm.com, borntraeger@linux.ibm.com, dsterba@suse.com, elder@linaro.org, gor@linux.ibm.com, gregkh@linuxfoundation.org, hca@linux.ibm.com, jcmvbkbc@gmail.com, jirislaby@kernel.org, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, stable@vger.kernel.org, xiam0nd.tong@gmail.com Subject: Re: [PATCH v2] char: tty3270: fix a missing check on list iterator Date: Mon, 28 Mar 2022 17:38:31 +0800 Message-Id: <20220328093831.28087-1-xiam0nd.tong@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > I should have written that in my first reply, but s == NULL means > the given line number couldn't be found in the list of lines. This is > a serious error and should be warned about. So maybe something like: > > if (WARN_ON(!s)) > return; > > But allocating a new empty line in that case is certainly wrong. Thank you, i have resend a v3 patch as you suggested. -- Xiaomeng Tong