From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 CAFEF8825 for ; Fri, 10 Mar 2023 14:58:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2FFF0C4339B; Fri, 10 Mar 2023 14:58:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1678460335; bh=VqZr35tAdxlVcLUMRIS6XMnv65tNG2HGO5s6XqHA0JY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Hih9nsPHXq04S5r8YYngqhd8b5rEn9yHuYZ/VRo54voESEj9xAoAnt8tJn6fXQDLP vYrDipfb04fYZLfsTeoIo6opBXWMZsHD8qiM0haiCTGNTYT3sxDdAyoDdg2+XTrKv1 dKYsf08q3ytMyZD/q80CQWaeYUD/ByMuBHLCEzxY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Florian Fainelli , "David S. Miller" , Sasha Levin Subject: [PATCH 5.10 300/529] net: bcmgenet: Add a check for oversized packets Date: Fri, 10 Mar 2023 14:37:23 +0100 Message-Id: <20230310133818.892407682@linuxfoundation.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230310133804.978589368@linuxfoundation.org> References: <20230310133804.978589368@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Florian Fainelli [ Upstream commit 5c0862c2c962052ed5055220a00ac1cefb92fbcd ] Occasionnaly we may get oversized packets from the hardware which exceed the nomimal 2KiB buffer size we allocate SKBs with. Add an early check which drops the packet to avoid invoking skb_over_panic() and move on to processing the next packet. Signed-off-by: Florian Fainelli Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/broadcom/genet/bcmgenet.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c index e0a6a2e62d23b..7667cbb5adfd6 100644 --- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c +++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c @@ -2263,6 +2263,14 @@ static unsigned int bcmgenet_desc_rx(struct bcmgenet_rx_ring *ring, __func__, p_index, ring->c_index, ring->read_ptr, dma_length_status); + if (unlikely(len > RX_BUF_LENGTH)) { + netif_err(priv, rx_status, dev, "oversized packet\n"); + dev->stats.rx_length_errors++; + dev->stats.rx_errors++; + dev_kfree_skb_any(skb); + goto next; + } + if (unlikely(!(dma_flag & DMA_EOP) || !(dma_flag & DMA_SOP))) { netif_err(priv, rx_status, dev, "dropping fragmented packet!\n"); -- 2.39.2