From patchwork Mon Jul 22 07:30:23 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anton Ivanov X-Patchwork-Id: 1134744 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=lists.infradead.org (client-ip=2607:7c80:54:e::133; helo=bombadil.infradead.org; envelope-from=linux-um-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=cambridgegreys.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="fdbRkSdA"; dkim-atps=neutral Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 45sYDr6p1Nz9s3l for ; Mon, 22 Jul 2019 17:30:52 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=45mmIp0L0vui6yYxrU3KkIJN75dFTxXqwe0vEGFv6N0=; b=fdbRkSdAS9fOnW5owM+vENgrY3 Ko3rVjT8gZW3CBP+xE/sXXnc6bAVTqowScvO9Fs771ZPIErDYXHVeoJFpf0mkcZ6UHOq4xzpr2/Pu 2palw2Nl04NnBcM2U5A4S91P2VixwGWOCZyQVetQcpcwnnHHQtyJkh8J/PgM6IrfiR2l/4Pe6H1Ic Zuuzl0xsTrIl0O5RBv+V88sgXNuJB12Zp97UYN7V1T7wr/oCy7139OIKJofU0X8GuXwFgSxtUKAMK ImlTToGyhPrNBONaciFbNzymz/k0iQPvIaeMHm0E9ccfcn7m1yLGa1AHcGDeWr1SfA1MRzmo1dRem dG7GCmHg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hpSmR-0003Pk-Ay; Mon, 22 Jul 2019 07:30:43 +0000 Received: from ivanoab6.miniserver.com ([5.153.251.140] helo=www.kot-begemot.co.uk) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hpSmL-0003NK-O6 for linux-um@lists.infradead.org; Mon, 22 Jul 2019 07:30:40 +0000 Received: from [192.168.17.6] (helo=jain.kot-begemot.co.uk) by www.kot-begemot.co.uk with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1hpSmJ-0001KH-3m; Mon, 22 Jul 2019 07:30:35 +0000 Received: from jain.kot-begemot.co.uk ([192.168.3.3]) by jain.kot-begemot.co.uk with esmtp (Exim 4.89) (envelope-from ) id 1hpSmG-0005V2-Ac; Mon, 22 Jul 2019 08:30:34 +0100 From: anton.ivanov@cambridgegreys.com To: linux-um@lists.infradead.org Subject: [PATCHv3 3/5] um: Add checks to mtu parameter parsing Date: Mon, 22 Jul 2019 08:30:23 +0100 Message-Id: <20190722073025.20844-3-anton.ivanov@cambridgegreys.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20190722073025.20844-1-anton.ivanov@cambridgegreys.com> References: <20190722073025.20844-1-anton.ivanov@cambridgegreys.com> X-Spam-Score: -1.0 X-Spam-Score: -1.0 X-Clacks-Overhead: GNU Terry Pratchett X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190722_003037_910550_B54CA32B X-CRM114-Status: UNSURE ( 9.67 ) X-CRM114-Notice: Please train this message. X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.0 SPF_NONE SPF: sender does not publish an SPF Record X-BeenThere: linux-um@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: richard@nod.at, Anton Ivanov MIME-Version: 1.0 Sender: "linux-um" Errors-To: linux-um-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org From: Anton Ivanov Adds a sanity check to the parsing of mtu command line param Signed-off-by: Anton Ivanov --- arch/um/drivers/vector_kern.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/um/drivers/vector_kern.c b/arch/um/drivers/vector_kern.c index e314a60cdc98..e79cd1dcb018 100644 --- a/arch/um/drivers/vector_kern.c +++ b/arch/um/drivers/vector_kern.c @@ -121,7 +121,8 @@ static int get_mtu(struct arglist *def) if (mtu != NULL) { if (kstrtoul(mtu, 10, &result) == 0) - return result; + if ((result < (1 << 16) - 1) && (result >= 576)) + return result; } return ETH_MAX_PACKET; }