From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Mon, 27 May 2024 12:28:07 +0200 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1sBXaJ-000ezt-0H for lore@lore.pengutronix.de; Mon, 27 May 2024 12:28:07 +0200 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1sBXaI-0005mq-1v for lore@pengutronix.de; Mon, 27 May 2024 12:28:06 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-Id:Date :Subject:To:From:Reply-To:Content-Type:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=HTlw/dkmsNeuCf5vmj7JuDD1dk3cIYWP2xG7yVeLg+4=; b=oZZBgUcH2rPWic DkoLe3s0boJRekE1+ynty7osralsNIsNUxRjsqJmj/giONO1cYENMN3N3XydNPhkt2iAJMI8Byot3 70yphZW5bs3Phm8Zx9OvHNH2qY2Febm2UreC6UX/mjwzk2ridSepCqJEfZccFqp1GUTIrTI2J6+Ya 9TmCvaLlFZpa7LJqzYTnYjMTTAGWZfuu0csjLaPDA1izXcZM23p4BFA4frUxGT5Vdaq1GJn1Hyw2h 91AnTuS1qRaExDxrH9kaUJtcG7wsPVntJqPSQyvmipPJu7ky0fX14FbMKxVKUjLO4yyAEs598eoQe oYF3DccWwNjgJV3X75kA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sBXZk-0000000Ea9n-27f4; Mon, 27 May 2024 10:27:32 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sBXZe-0000000Ea6o-2Muq for barebox@lists.infradead.org; Mon, 27 May 2024 10:27:29 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1sBXZc-0005RH-Ck; Mon, 27 May 2024 12:27:24 +0200 Received: from [2a0a:edc0:0:1101:1d::28] (helo=dude02.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1sBXZb-003Asr-VJ; Mon, 27 May 2024 12:27:23 +0200 Received: from localhost ([::1] helo=dude02.red.stw.pengutronix.de) by dude02.red.stw.pengutronix.de with esmtp (Exim 4.96) (envelope-from ) id 1sBXZb-00Ejyk-2m; Mon, 27 May 2024 12:27:23 +0200 From: Sascha Hauer To: Barebox List Date: Mon, 27 May 2024 12:27:18 +0200 Message-Id: <20240527102723.3504270-3-s.hauer@pengutronix.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240527102723.3504270-1-s.hauer@pengutronix.de> References: <20240527102723.3504270-1-s.hauer@pengutronix.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240527_032726_704585_597C41B1 X-CRM114-Status: GOOD ( 12.00 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jianqiang wang Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-5.1 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH v2 2/7] net: cs8900: do not read past the receive buffer X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) the hardware may report a packet longer than our receive buffer. Instead of reading past the read buffer, discard too long packets. Signed-off-by: Sascha Hauer --- drivers/net/cs8900.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/drivers/net/cs8900.c b/drivers/net/cs8900.c index afb0f3e26e..bce26d4def 100644 --- a/drivers/net/cs8900.c +++ b/drivers/net/cs8900.c @@ -295,10 +295,14 @@ static int cs8900_recv(struct eth_device *dev) status = readw(priv->regs + CS8900_RTDATA0); len = readw(priv->regs + CS8900_RTDATA0); - for (addr = (u16 *)priv->rx_buf, i = (len + 1) >> 1; i > 0; i--) - *addr++ = readw(priv->regs + CS8900_RTDATA0); - - net_receive(dev, priv->rx_buf, len); + if (len <= PKTSIZE) { + for (addr = (u16 *)priv->rx_buf, i = (len + 1) >> 1; i > 0; i--) + *addr++ = readw(priv->regs + CS8900_RTDATA0); + net_receive(dev, priv->rx_buf, len); + } else { + for (addr = (u16 *)priv->rx_buf, i = (len + 1) >> 1; i > 0; i--) + (void)readw(priv->regs + CS8900_RTDATA0); + } return len; } -- 2.39.2