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 13C42C54EBE for ; Mon, 16 Jan 2023 16:55:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233922AbjAPQzm (ORCPT ); Mon, 16 Jan 2023 11:55:42 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46948 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233917AbjAPQyk (ORCPT ); Mon, 16 Jan 2023 11:54:40 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 92FBD58299 for ; Mon, 16 Jan 2023 08:38:17 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 83517B80DC7 for ; Mon, 16 Jan 2023 16:38:14 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DE0F0C433D2; Mon, 16 Jan 2023 16:38:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1673887093; bh=Nk0UU05SlVqC22UnMeONzRQVTOyBD6Jh7WSeZaO6dl8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IOFXp+jzXeef9JyctPRlBJmIS4pxGKxqEZv6EH5Kjo8JIUf/FymdUjmmtrwTSRkck LnchpehmXfN0RqYTVDToz26rNlVLauWldAxGKvS5TWy1LhGhc9ufPK/CMju33B1SR0 Nfsowiay0CYUwxZeinx1oXJc4zNgXqCCSzjBYKAw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Akihiko Odaki , Tony Nguyen , Leon Romanovsky , Jakub Kicinski Subject: [PATCH 4.19 019/521] igb: Initialize mailbox message for VF reset Date: Mon, 16 Jan 2023 16:44:41 +0100 Message-Id: <20230116154848.138270242@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230116154847.246743274@linuxfoundation.org> References: <20230116154847.246743274@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: Tony Nguyen commit de5dc44370fbd6b46bd7f1a1e00369be54a041c8 upstream. When a MAC address is not assigned to the VF, that portion of the message sent to the VF is not set. The memory, however, is allocated from the stack meaning that information may be leaked to the VM. Initialize the message buffer to 0 so that no information is passed to the VM in this case. Fixes: 6ddbc4cf1f4d ("igb: Indicate failure on vf reset for empty mac address") Reported-by: Akihiko Odaki Signed-off-by: Tony Nguyen Reviewed-by: Akihiko Odaki Reviewed-by: Leon Romanovsky Link: https://lore.kernel.org/r/20221212190031.3983342-1-anthony.l.nguyen@intel.com Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/intel/igb/igb_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -7165,7 +7165,7 @@ static void igb_vf_reset_msg(struct igb_ { struct e1000_hw *hw = &adapter->hw; unsigned char *vf_mac = adapter->vf_data[vf].vf_mac_addresses; - u32 reg, msgbuf[3]; + u32 reg, msgbuf[3] = {}; u8 *addr = (u8 *)(&msgbuf[1]); /* process all the same items cleared in a function level reset */