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 362C8C00140 for ; Fri, 12 Aug 2022 11:45:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238061AbiHLLpx (ORCPT ); Fri, 12 Aug 2022 07:45:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53190 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238206AbiHLLpZ (ORCPT ); Fri, 12 Aug 2022 07:45:25 -0400 Received: from mx1.molgen.mpg.de (mx3.molgen.mpg.de [141.14.17.11]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2FE05AFAF2; Fri, 12 Aug 2022 04:44:49 -0700 (PDT) Received: from [141.14.220.45] (g45.guest.molgen.mpg.de [141.14.220.45]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: pmenzel) by mx.molgen.mpg.de (Postfix) with ESMTPSA id 261F361EA1929; Fri, 12 Aug 2022 13:44:45 +0200 (CEST) Message-ID: Date: Fri, 12 Aug 2022 13:44:44 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.1.2 Subject: Re: mainline build failure due to 332f1795ca20 ("Bluetooth: L2CAP: Fix l2cap_global_chan_by_psm regression") Content-Language: en-US To: Sudip Mukherjee Cc: torvalds@linux-foundation.org, Jakub Kicinski , Marcel Holtmann , Johan Hedberg , Luiz Augusto von Dentz , "David S. Miller" , Eric Dumazet , Paolo Abeni , linux-bluetooth@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Palmer Dabbelt References: From: Paul Menzel In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org Dear Sudip, Am 12.08.22 um 13:25 schrieb Sudip Mukherjee (Codethink): > The latest mainline kernel branch fails to build csky and mips allmodconfig > with gcc-12. > > mips error is: > > In function 'memcmp', > inlined from 'bacmp' at ./include/net/bluetooth/bluetooth.h:347:9, > inlined from 'l2cap_global_chan_by_psm' at net/bluetooth/l2cap_core.c:2003:15: > ./include/linux/fortify-string.h:44:33: error: '__builtin_memcmp' specified bound 6 exceeds source size 0 [-Werror=stringop-overread] > 44 | #define __underlying_memcmp __builtin_memcmp > | ^ > ./include/linux/fortify-string.h:420:16: note: in expansion of macro '__underlying_memcmp' > 420 | return __underlying_memcmp(p, q, size); > | ^~~~~~~~~~~~~~~~~~~ > In function 'memcmp', > inlined from 'bacmp' at ./include/net/bluetooth/bluetooth.h:347:9, > inlined from 'l2cap_global_chan_by_psm' at net/bluetooth/l2cap_core.c:2004:15: > ./include/linux/fortify-string.h:44:33: error: '__builtin_memcmp' specified bound 6 exceeds source size 0 [-Werror=stringop-overread] > 44 | #define __underlying_memcmp __builtin_memcmp > | ^ > ./include/linux/fortify-string.h:420:16: note: in expansion of macro '__underlying_memcmp' > 420 | return __underlying_memcmp(p, q, size); > | ^~~~~~~~~~~~~~~~~~~ > > > csky error is: > > In file included from net/bluetooth/l2cap_core.c:37: > In function 'bacmp', > inlined from 'l2cap_global_chan_by_psm' at net/bluetooth/l2cap_core.c:2003:15: > ./include/net/bluetooth/bluetooth.h:347:16: error: 'memcmp' specified bound 6 exceeds source size 0 [-Werror=stringop-overread] > 347 | return memcmp(ba1, ba2, sizeof(bdaddr_t)); > | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > In function 'bacmp', > inlined from 'l2cap_global_chan_by_psm' at net/bluetooth/l2cap_core.c:2004:15: > ./include/net/bluetooth/bluetooth.h:347:16: error: 'memcmp' specified bound 6 exceeds source size 0 [-Werror=stringop-overread] > 347 | return memcmp(ba1, ba2, sizeof(bdaddr_t)); > | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > > git bisect pointed to 332f1795ca20 ("Bluetooth: L2CAP: Fix l2cap_global_chan_by_psm regression"). > And, reverting that commit has fixed the build failure. > > Already reported at https://lore.kernel.org/lkml/YvVQEDs75pxSgxjM@debian/ > and Jacub is looking at a fix, but this is just my usual build failure > mail of mainline branch for Linus's information. Does *[PATCH] Bluetooth: L2CAP: Elide a string overflow warning* [1] fix it? Kind regards, Paul PS: > -- > Regards > Sudip Only if you care, your signature delimiter is missing a trailing space [2]. [1]: https://lore.kernel.org/linux-bluetooth/20220812055249.8037-1-palmer@rivosinc.com/T/#t [2]: https://en.wikipedia.org/wiki/Signature_block#Standard_delimiter