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 X-Spam-Level: X-Spam-Status: No, score=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5F115C433E6 for ; Sat, 29 Aug 2020 07:49:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3710720838 for ; Sat, 29 Aug 2020 07:49:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=gmx.net header.i=@gmx.net header.b="fAinSf8G" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726105AbgH2Ht6 (ORCPT ); Sat, 29 Aug 2020 03:49:58 -0400 Received: from mout.gmx.net ([212.227.15.19]:33697 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726056AbgH2Ht5 (ORCPT ); Sat, 29 Aug 2020 03:49:57 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1598687382; bh=CRN7gxrHWKY8PuddBKnZbfdaUK2X4VSJCXmTTwPU/Ps=; h=X-UI-Sender-Class:Subject:From:To:References:Date:In-Reply-To; b=fAinSf8Gj+dQ5l+UjUnlXo93Mw4jIfh0ZU9PcSgbPjiXqiXT/dNYhqyNDAvj1BbQi WREdx/sVK7CTzVzyW+8j9AtPOxoYVE+t70YiPdrE0hq6OR8pJtdz2y67LdfowxTA/a hNO0satJ67BSupgteuwIljsBRhkrmRPSEceRRUfE= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from [0.0.0.0] ([149.28.201.231]) by mail.gmx.com (mrgmx005 [212.227.17.184]) with ESMTPSA (Nemesis) id 1MhD6W-1kp8FT3u7O-00ePnx; Sat, 29 Aug 2020 09:49:42 +0200 Subject: Re: [ARM64][GCC10] Kernel can't load any module due to RWX check From: Qu Wenruo To: linux-modules@vger.kernel.org, linux-arm-kernel@lists.infradead.org, peterz@infradead.org References: Autocrypt: addr=quwenruo.btrfs@gmx.com; prefer-encrypt=mutual; keydata= mQENBFnVga8BCACyhFP3ExcTIuB73jDIBA/vSoYcTyysFQzPvez64TUSCv1SgXEByR7fju3o 8RfaWuHCnkkea5luuTZMqfgTXrun2dqNVYDNOV6RIVrc4YuG20yhC1epnV55fJCThqij0MRL 1NxPKXIlEdHvN0Kov3CtWA+R1iNN0RCeVun7rmOrrjBK573aWC5sgP7YsBOLK79H3tmUtz6b 9Imuj0ZyEsa76Xg9PX9Hn2myKj1hfWGS+5og9Va4hrwQC8ipjXik6NKR5GDV+hOZkktU81G5 gkQtGB9jOAYRs86QG/b7PtIlbd3+pppT0gaS+wvwMs8cuNG+Pu6KO1oC4jgdseFLu7NpABEB AAG0IlF1IFdlbnJ1byA8cXV3ZW5ydW8uYnRyZnNAZ214LmNvbT6JAU4EEwEIADgCGwMFCwkI BwIGFQgJCgsCBBYCAwECHgECF4AWIQQt33LlpaVbqJ2qQuHCPZHzoSX+qAUCXZw1oQAKCRDC PZHzoSX+qCY6CACd+mWu3okGwRKXju6bou+7VkqCaHTdyXwWFTsr+/0ly5nUdDtT3yEVggPJ 3VP70wjlrxUjNjFb6iIvGYxiPOrop1NGwGYvQktgRhaIhALG6rPoSSAhGNjwGVRw0km0PlIN D29BTj/lYEk+jVM1YL0QLgAE1AI3krihg/lp/fQT53wLhR8YZIF8ETXbClQG1vJ0cllPuEEv efKxRyiTSjB+PsozSvYWhXsPeJ+KKjFen7ebE5reQTPFzSHctCdPnoR/4jSPlnTlnEvLeqcD ZTuKfQe1gWrPeevQzgCtgBF/WjIOeJs41klnYzC3DymuQlmFubss0jShLOW8eSOOWhLRuQEN BFnVga8BCACqU+th4Esy/c8BnvliFAjAfpzhI1wH76FD1MJPmAhA3DnX5JDORcgaCbPEwhLj 1xlwTgpeT+QfDmGJ5B5BlrrQFZVE1fChEjiJvyiSAO4yQPkrPVYTI7Xj34FnscPj/IrRUUka 68MlHxPtFnAHr25VIuOS41lmYKYNwPNLRz9Ik6DmeTG3WJO2BQRNvXA0pXrJH1fNGSsRb+pK EKHKtL1803x71zQxCwLh+zLP1iXHVM5j8gX9zqupigQR/Cel2XPS44zWcDW8r7B0q1eW4Jrv 0x19p4P923voqn+joIAostyNTUjCeSrUdKth9jcdlam9X2DziA/DHDFfS5eq4fEvABEBAAGJ ATwEGAEIACYCGwwWIQQt33LlpaVbqJ2qQuHCPZHzoSX+qAUCXZw1rgUJCWpOfwAKCRDCPZHz oSX+qFcEB/95cs8cM1OQdE/GgOfCGxwgckMeWyzOR7bkAWW0lDVp2hpgJuxBW/gyfmtBnUai fnggx3EE3ev8HTysZU9q0h+TJwwJKGv6sUc8qcTGFDtavnnl+r6xDUY7A6GvXEsSoCEEynby 72byGeSovfq/4AWGNPBG1L61Exl+gbqfvbECP3ziXnob009+z9I4qXodHSYINfAkZkA523JG ap12LndJeLk3gfWNZfXEWyGnuciRGbqESkhIRav8ootsCIops/SqXm0/k+Kcl4gGUO/iD/T5 oagaDh0QtOd8RWSMwLxwn8uIhpH84Q4X1LadJ5NCgGa6xPP5qqRuiC+9gZqbq4Nj Message-ID: <2d00ffc3-1176-1b80-20a5-e7f6babf924a@gmx.com> Date: Sat, 29 Aug 2020 15:49:36 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.11.0 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="LrxD5NFIiGmv2PyffUTm0g4Tuo9YRoo6F" X-Provags-ID: V03:K1:Bs94OsUul5z1P97cy+vLU/XrcbVKuzy6orjhbjMQJAYXoJN6zGl HDqK3jokS21eMaoezV2fHop8N0o25+/9Lk4bOUzeDziw5pQ0IWUQbve32r1S8b6YBsSvbL6 aUdnx1yEvJSZc0ecXqZbINdCXOTyhIQyVnFOct/SdUUSljJIs3FN2l21ssPpIJkd/ES+Bwe hTw5/X03S4VQE0FFUbg7g== X-UI-Out-Filterresults: notjunk:1;V03:K0:1TYFiDu1Wfk=:K01qq/UKCxmZVNBricYOKp JcWQkKJlLAFa4sEvr7ri3/o8ZPZfYi4LKiAdxziP0kwRPDr9AH7EV9Kf4LoJLVcRwf9n0jPmr iNM6HE9OytoeHtdXIt6AIYVPxMQ+J3Tlu1f0nm9BNYHiVcf6BfYetYhM94OWpVo9C/BsqQcv6 f9bcVFy0tGXZBcRb58dP8AaNk2g6tTH6M2elleqqFRV0fGE6RQ61SKBiIgyuYxfIhe5YBP27X 06mCKqMWREKyn5ZhDu8W+qcuAiMnnihc4b0IoBcCFlXE0fx08yyRkCwGRRIatMZmItEpm44ky BlMzNPg2w547OhD0Iz3nR4gNrMJV5rhGq1KQDEGgDDOXIg73M0EB1yp3gh0Pn3umcy/1y+l9c 9iyUu4mmfK4Eq+PBhYeN4DFos2EyVLEXUO26UjU9iHXqNnYKoL5TqMC1gt1jo2kgBDaF8vJaQ syhWDUuDoFvPTsxUBTxhTxqcETuqEGDcNWga0fL+UI1NA/bEDdlOtKikzooxtJR686bgi4i5c snQYUlBufGX62rTq/B/E5I3++SGEGTT0GdNTHynSP9HkPMcPW/ubW0+99j5sk2id4EeZCoGOE Em9tJ80T8p9/s8wE/UUS9kNSainED3ixhArRReaiGnLF7RVJOl53KDzfzm0JkA7XoIOp647A4 DTGm1j47JWL23A0WJWbjSyRBd5tr6JJ6pDjS+RRTHX2MSy8iUgDLG5XgVOh2Bh3ARArOs0auT 6N6jQLCj0KzZj/sPNfC72NqYuciCkYij0rsMK8fv+K2RBQzsCtqofFe1A1A1Vf+iwe5p7dBAd 7YKITwIBpdeIzBvRvx3Q2uOa2Am4h5qQLh9SMYOCXm+WT9QrGbZhB4JeYdUZclGtrFpDwOaIf 2oC2mk4pvsURq9ZkHwfwctNKh2p4CjOCv4uBKfDuz2tjZpx+pdsgwfk80l2DEx8ASWA6D9RNv xCu8vsMqzRewgRRCtlXrE6LncKnmeOSykC2wg7BIL2bsWxnKrf9Pem+KThh38NZUTGxD+CKBM drYlF8f1LgdZC39lU516s7VnMNUlL+i5sFKGq6qPiqUPt7URzA/UT6b4tArlhvjBuCLtooicH rZ9IQ87W0k1w0CBj+snHHefT/sQPH2flH3Jvb11h03jxSBtteLCFztzeGgi4Z4w9phygefSCi mLWQieYfISoLVq9itYVwNZ3x1pMYa0ZSZbvtrSAqz8nmld+qGEdREYWkwY9LXC9DH869s/8Z2 sDV4LqeWFF7Y+UwTVXqyx7wpmRjcW+jkm+gNWzQ== Sender: owner-linux-modules@vger.kernel.org Precedence: bulk List-ID: This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --LrxD5NFIiGmv2PyffUTm0g4Tuo9YRoo6F Content-Type: multipart/mixed; boundary="rlFm2pJH6rwrEIdebavTa8tLQTszTJn8z" --rlFm2pJH6rwrEIdebavTa8tLQTszTJn8z Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 2020/8/29 =E4=B8=8B=E5=8D=883:44, Qu Wenruo wrote: > Hi, >=20 > Recently built a v5.9-rc2 kernel, it boots fine, but unable to load any= > kernel module. >=20 > After some debugging, it shows that it's due to RWX check failure: >=20 > load_module: start > module_enforce_rwx_sections: index=3D22 sh_flags=3D0x7 shf_wx=3D0x5 > layout_and_allocate: module enforce rwx sections > load_module: failed to alloc layout and allocate > load_module: end >=20 > Futhermore, it's unable to disable the RWX check through "make > menuconfig", since the ARCH_OPTIONAL_KERNEL_RWX is no for arm64. >=20 > The offending section 22 looks like this: (the kernel reports 38 > sectors, while we only have 37, thus near-by sections are also shown he= re). >=20 > 20 .data 00000aa0 0000000000000000 0000000000000000 00086d0= 8 > 2**3 > CONTENTS, ALLOC, LOAD, RELOC, DATA > 21 __bug_table 000000cc 0000000000000000 0000000000000000 000877a= 8 > 2**2 > CONTENTS, ALLOC, LOAD, RELOC, DATA > 22 __dyndbg 0000b9b8 0000000000000000 0000000000000000 0008787= 8 > 2**3 > CONTENTS, ALLOC, LOAD, RELOC, DATA > 23 .data.unlikely 00000012 0000000000000000 0000000000000000 > 00093230 2**0 > CONTENTS, ALLOC, LOAD, DATA >=20 > I'm using GCC 10.2.0, could this be the cause? I should check the git log, the module_enforce_rwx_sections() is just recently added by commit 5c3a7db0c7ec ("module: Harden STRICT_MODULE_RWX"= ). Hi Peter, any idea how could this commit causing a regression on arm64 but not on x86_64? Thanks, Qu >=20 > Thanks, > Qu >=20 >=20 >=20 --rlFm2pJH6rwrEIdebavTa8tLQTszTJn8z-- --LrxD5NFIiGmv2PyffUTm0g4Tuo9YRoo6F Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEELd9y5aWlW6idqkLhwj2R86El/qgFAl9KCJAACgkQwj2R86El /qhL9gf/WpdLn2XUpSd4T5qN6nf2VzX2a2mbb7f2toVvhfqRx4s36dJ4QUBfih0N oH71xcamNneLDZ3YkvEDSjow3Gu64Ug+WNT0KavG/xIRD8ThmydtUHvkEeR22hSy bTAYpOQs/MeNxzBM9f6u0aupO7fkhqPFDXMBVWC8BjlthrT1F3AuB9x/nVrDSYlq S474SsdFja5jOejlHMntA7hvIkXzazd14tlen3iqDwUzgzZ4zrPHgPivT4+zJAPs E1ZGP13OVUt8MyFheF8cR/dJB8K4thk2N+VjSbXHTJzZU3SNJ0C6rgZiHjqhpPwg M8zmzdTVnsDCsqFHf4XGosCwSY7nwg== =0wz7 -----END PGP SIGNATURE----- --LrxD5NFIiGmv2PyffUTm0g4Tuo9YRoo6F--