From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 34CE5C04FDF for ; Tue, 1 Aug 2023 09:35:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233153AbjHAJfx (ORCPT ); Tue, 1 Aug 2023 05:35:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34968 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233127AbjHAJfa (ORCPT ); Tue, 1 Aug 2023 05:35:30 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9B1D01BCC for ; Tue, 1 Aug 2023 02:33:31 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 20B8F613E2 for ; Tue, 1 Aug 2023 09:33:31 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 30083C433C8; Tue, 1 Aug 2023 09:33:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1690882410; bh=RNSpY8Wlq6iZA3NwoukpyH+WE7F5hLROrc7d5GWkqIM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BLgNTkmLVhJU6lZR7JdsbkmCFOhNQFvaMAGoQEdXB6BX427dWg/n2pECGnCFs8NTq h3uB1DeAY7aTD17V9n1n9zQWUoVx4wD4/O/oM/FYLHyWH71XDu3d3TMpI0TKqrfEB2 OzLftmuHGxtI+YYkx5yRYzL5GpWDa4bnznOeK8O4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Michal Schmidt , Przemek Kitszel , Jedrzej Jagielski , Leon Romanovsky , Tony Nguyen , Jakub Kicinski , Sasha Levin , Pucha Himasekhar Reddy Subject: [PATCH 6.1 096/228] ice: Fix memory management in ice_ethtool_fdir.c Date: Tue, 1 Aug 2023 11:19:14 +0200 Message-ID: <20230801091926.302496188@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230801091922.799813980@linuxfoundation.org> References: <20230801091922.799813980@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Jedrzej Jagielski [ Upstream commit a3336056504d780590ac6d6ac94fbba829994594 ] Fix ethtool FDIR logic to not use memory after its release. In the ice_ethtool_fdir.c file there are 2 spots where code can refer to pointers which may be missing. In the ice_cfg_fdir_xtrct_seq() function seg may be freed but even then may be still used by memcpy(&tun_seg[1], seg, sizeof(*seg)). In the ice_add_fdir_ethtool() function struct ice_fdir_fltr *input may first fail to be added via ice_fdir_update_list_entry() but then may be deleted by ice_fdir_update_list_entry. Terminate in both cases when the returned value of the previous operation is other than 0, free memory and don't use it anymore. Reported-by: Michal Schmidt Link: https://bugzilla.redhat.com/show_bug.cgi?id=2208423 Fixes: cac2a27cd9ab ("ice: Support IPv4 Flow Director filters") Reviewed-by: Przemek Kitszel Signed-off-by: Jedrzej Jagielski Reviewed-by: Leon Romanovsky Tested-by: Pucha Himasekhar Reddy (A Contingent worker at Intel) Signed-off-by: Tony Nguyen Link: https://lore.kernel.org/r/20230721155854.1292805-1-anthony.l.nguyen@intel.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- .../net/ethernet/intel/ice/ice_ethtool_fdir.c | 26 ++++++++++--------- 1 file changed, 14 insertions(+), 12 deletions(-) diff --git a/drivers/net/ethernet/intel/ice/ice_ethtool_fdir.c b/drivers/net/ethernet/intel/ice/ice_ethtool_fdir.c index ead6d50fc0adc..8c6e13f87b7d3 100644 --- a/drivers/net/ethernet/intel/ice/ice_ethtool_fdir.c +++ b/drivers/net/ethernet/intel/ice/ice_ethtool_fdir.c @@ -1281,16 +1281,21 @@ ice_cfg_fdir_xtrct_seq(struct ice_pf *pf, struct ethtool_rx_flow_spec *fsp, ICE_FLOW_FLD_OFF_INVAL); } - /* add filter for outer headers */ fltr_idx = ice_ethtool_flow_to_fltr(fsp->flow_type & ~FLOW_EXT); + + assign_bit(fltr_idx, hw->fdir_perfect_fltr, perfect_filter); + + /* add filter for outer headers */ ret = ice_fdir_set_hw_fltr_rule(pf, seg, fltr_idx, ICE_FD_HW_SEG_NON_TUN); - if (ret == -EEXIST) - /* Rule already exists, free memory and continue */ - devm_kfree(dev, seg); - else if (ret) + if (ret == -EEXIST) { + /* Rule already exists, free memory and count as success */ + ret = 0; + goto err_exit; + } else if (ret) { /* could not write filter, free memory */ goto err_exit; + } /* make tunneled filter HW entries if possible */ memcpy(&tun_seg[1], seg, sizeof(*seg)); @@ -1305,18 +1310,13 @@ ice_cfg_fdir_xtrct_seq(struct ice_pf *pf, struct ethtool_rx_flow_spec *fsp, devm_kfree(dev, tun_seg); } - if (perfect_filter) - set_bit(fltr_idx, hw->fdir_perfect_fltr); - else - clear_bit(fltr_idx, hw->fdir_perfect_fltr); - return ret; err_exit: devm_kfree(dev, tun_seg); devm_kfree(dev, seg); - return -EOPNOTSUPP; + return ret; } /** @@ -1914,7 +1914,9 @@ int ice_add_fdir_ethtool(struct ice_vsi *vsi, struct ethtool_rxnfc *cmd) input->comp_report = ICE_FXD_FLTR_QW0_COMP_REPORT_SW_FAIL; /* input struct is added to the HW filter list */ - ice_fdir_update_list_entry(pf, input, fsp->location); + ret = ice_fdir_update_list_entry(pf, input, fsp->location); + if (ret) + goto release_lock; ret = ice_fdir_write_all_fltr(pf, input, true); if (ret) -- 2.39.2