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 EA4D66FA1 for ; Wed, 30 Nov 2022 18:27:27 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2E354C433D6; Wed, 30 Nov 2022 18:27:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1669832847; bh=A/31FoIveb2WxbqlnDMAVcULgHiMi/pFgsarCiSUo8s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CnIitrXAeOBxpw6u6YZwfmUKuv7rjiRCrCFUJfQUe8sMhBXsTpP44cZQS5DFpOzRU mJqeoGrOeoa867U3l7oxE12YQ8g5iJELRWDibOF1udzjMolj4DsDJKlHKE7mAQpF5t evPueivq8OEE5e0EEJnx7T9D5fGu53RCsGqkxyt4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jaco Coetzee , Louis Peens , Simon Horman , Jakub Kicinski , Sasha Levin Subject: [PATCH 5.10 061/162] nfp: add port from netdev validation for EEPROM access Date: Wed, 30 Nov 2022 19:22:22 +0100 Message-Id: <20221130180530.161353252@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221130180528.466039523@linuxfoundation.org> References: <20221130180528.466039523@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: Jaco Coetzee [ Upstream commit 0873016d46f6dfafd1bdf4d9b935b3331b226f7c ] Setting of the port flag `NFP_PORT_CHANGED`, introduced to ensure the correct reading of EEPROM data, causes a fatal kernel NULL pointer dereference in cases where the target netdev type cannot be determined. Add validation of port struct pointer before attempting to set the `NFP_PORT_CHANGED` flag. Return that operation is not supported if the netdev type cannot be determined. Fixes: 4ae97cae07e1 ("nfp: ethtool: fix the display error of `ethtool -m DEVNAME`") Signed-off-by: Jaco Coetzee Reviewed-by: Louis Peens Signed-off-by: Simon Horman Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c index 3977aa2f59bd..311873ff57e3 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c @@ -1225,6 +1225,9 @@ nfp_port_get_module_info(struct net_device *netdev, u8 data; port = nfp_port_from_netdev(netdev); + if (!port) + return -EOPNOTSUPP; + /* update port state to get latest interface */ set_bit(NFP_PORT_CHANGED, &port->flags); eth_port = nfp_port_get_eth_port(port); -- 2.35.1