From nobody Mon Sep 29 22:34:29 2025 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 2B36EC2BB45 for ; Mon, 15 Aug 2022 22:42:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1351256AbiHOWlp (ORCPT ); Mon, 15 Aug 2022 18:41:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38600 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350829AbiHOWhM (ORCPT ); Mon, 15 Aug 2022 18:37:12 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 57067F580; Mon, 15 Aug 2022 12:50:34 -0700 (PDT) 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 dfw.source.kernel.org (Postfix) with ESMTPS id 872596125F; Mon, 15 Aug 2022 19:49:31 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7E702C433C1; Mon, 15 Aug 2022 19:49:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1660592970; bh=VJCmYCac8+0GtJU2jX1P9L9/IdytulRpy/aYEWsiEso=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XjbW+k7harS4zQKEp1O7nJEaqMN5/Idc5JGteMviflf06SXNqAczMdcRauImmNbCJ 9z0KVKS1fwQ6a7JG20k/lOjzUMmPr0sirBdZwy5VuBe4XGPr1Z6z3mIwZbUXmViWIr 5+lv5auYH24qrOzi0U6y4sjU7rS+h2mZtiFATUrA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Xiu Jianfeng , Paul Moore , Sasha Levin Subject: [PATCH 5.19 0194/1157] selinux: Add boundary check in put_entry() Date: Mon, 15 Aug 2022 19:52:30 +0200 Message-Id: <20220815180447.494296967@linuxfoundation.org> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220815180439.416659447@linuxfoundation.org> References: <20220815180439.416659447@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Xiu Jianfeng [ Upstream commit 15ec76fb29be31df2bccb30fc09875274cba2776 ] Just like next_entry(), boundary check is necessary to prevent memory out-of-bound access. Signed-off-by: Xiu Jianfeng Signed-off-by: Paul Moore Signed-off-by: Sasha Levin --- security/selinux/ss/policydb.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/security/selinux/ss/policydb.h b/security/selinux/ss/policydb.h index c24d4e1063ea..ffc4e7bad205 100644 --- a/security/selinux/ss/policydb.h +++ b/security/selinux/ss/policydb.h @@ -370,6 +370,8 @@ static inline int put_entry(const void *buf, size_t byt= es, int num, struct polic { size_t len =3D bytes * num; =20 + if (len > fp->len) + return -EINVAL; memcpy(fp->data, buf, len); fp->data +=3D len; fp->len -=3D len; --=20 2.35.1