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 91B03C4332F for ; Thu, 9 Nov 2023 20:35:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230150AbjKIUfP (ORCPT ); Thu, 9 Nov 2023 15:35:15 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53006 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229560AbjKIUfO (ORCPT ); Thu, 9 Nov 2023 15:35:14 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B145A18E for ; Thu, 9 Nov 2023 12:34:30 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1699562069; 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AGHT+IGnVz7WwFSCNQz1Zoy2JUBgLXOhkda+hpR7PmjD8EGs7R/cRGWGm5z/RY/XirI7WjCcuJ2xUQ== X-Received: by 2002:a17:907:9488:b0:9de:b20c:be46 with SMTP id dm8-20020a170907948800b009deb20cbe46mr4992159ejc.3.1699562067108; Thu, 09 Nov 2023 12:34:27 -0800 (PST) Received: from [10.0.0.168] ([37.186.169.33]) by smtp.gmail.com with ESMTPSA id h17-20020a17090634d100b009b29553b648sm2956437ejb.206.2023.11.09.12.34.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 09 Nov 2023 12:34:26 -0800 (PST) Message-ID: <0da07d8c11797fdbc52a20dc59b819aae632c24c.camel@redhat.com> Subject: Re: [PATCH nft 1/3] parser: don't mark "string" as const From: Thomas Haller To: Pablo Neira Ayuso Cc: NetFilter Date: Thu, 09 Nov 2023 21:34:26 +0100 In-Reply-To: References: <20231109190032.669575-1-thaller@redhat.com> Autocrypt: addr=thaller@redhat.com; prefer-encrypt=mutual; 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 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.50.0 (3.50.0-1.fc39) MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netfilter-devel@vger.kernel.org On Thu, 2023-11-09 at 20:22 +0100, Pablo Neira Ayuso wrote: > On Thu, Nov 09, 2023 at 07:59:47PM +0100, Thomas Haller wrote: > > The "string" field is allocated, and the bison actions are expected > > to > > take/free them. It's not const, and it should not be freed with > > free_const(). >=20 > This ifname_expr_alloc() function does not modify the 'name' > argument, > this is really const. ifname_expr_alloc() calls `free(name)`, destroying the thing that is pointed at. That's a modification. The code required to cast away the constness, which also indicates that it is not actually const. Thomas