From patchwork Mon Dec 6 14:55:26 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 521554 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 40747C4332F for ; Mon, 6 Dec 2021 15:07:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1356210AbhLFPLJ (ORCPT ); Mon, 6 Dec 2021 10:11:09 -0500 Received: from ams.source.kernel.org ([145.40.68.75]:38960 "EHLO ams.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347033AbhLFPIC (ORCPT ); Mon, 6 Dec 2021 10:08:02 -0500 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 BFA70B81126; Mon, 6 Dec 2021 15:04:31 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 00E4FC341C1; Mon, 6 Dec 2021 15:04:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1638803070; bh=Sn8tndyMRnu26tV783OUTcsuI7UKqTEhnAAgF7tTOSA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=k377CSfS1CYYct/c3sXfFp3kMnKWwwpuAHloHDh0D3FCov6vSUevEyzIi7L78M8eq N08sTjh5WS8aDaKs/7tn5sNXkOvG5fbXeADoQ9H9kfi2NbFkbGQfvk9OZktLLbOBA+ aK0s94+EM7CkHlhPol2KvxU1yyj3aToYJ/hXO1KQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Alexander Aring , Stefan Schmidt , Sasha Levin Subject: [PATCH 4.14 018/106] net: ieee802154: handle iftypes as u32 Date: Mon, 6 Dec 2021 15:55:26 +0100 Message-Id: <20211206145556.007221323@linuxfoundation.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20211206145555.386095297@linuxfoundation.org> References: <20211206145555.386095297@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Alexander Aring [ Upstream commit 451dc48c806a7ce9fbec5e7a24ccf4b2c936e834 ] This patch fixes an issue that an u32 netlink value is handled as a signed enum value which doesn't fit into the range of u32 netlink type. If it's handled as -1 value some BIT() evaluation ends in a shift-out-of-bounds issue. To solve the issue we set the to u32 max which is s32 "-1" value to keep backwards compatibility and let the followed enum values start counting at 0. This brings the compiler to never handle the enum as signed and a check if the value is above NL802154_IFTYPE_MAX should filter -1 out. Fixes: f3ea5e44231a ("ieee802154: add new interface command") Signed-off-by: Alexander Aring Link: https://lore.kernel.org/r/20211112030916.685793-1-aahringo@redhat.com Signed-off-by: Stefan Schmidt Signed-off-by: Sasha Levin --- include/net/nl802154.h | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/include/net/nl802154.h b/include/net/nl802154.h index ddcee128f5d9a..145acb8f25095 100644 --- a/include/net/nl802154.h +++ b/include/net/nl802154.h @@ -19,6 +19,8 @@ * */ +#include + #define NL802154_GENL_NAME "nl802154" enum nl802154_commands { @@ -150,10 +152,9 @@ enum nl802154_attrs { }; enum nl802154_iftype { - /* for backwards compatibility TODO */ - NL802154_IFTYPE_UNSPEC = -1, + NL802154_IFTYPE_UNSPEC = (~(__u32)0), - NL802154_IFTYPE_NODE, + NL802154_IFTYPE_NODE = 0, NL802154_IFTYPE_MONITOR, NL802154_IFTYPE_COORD,