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 D9177C7EE2C for ; Thu, 24 Aug 2023 14:57:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241882AbjHXO5R (ORCPT ); Thu, 24 Aug 2023 10:57:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48502 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241947AbjHXO4z (ORCPT ); Thu, 24 Aug 2023 10:56:55 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F266719B3 for ; Thu, 24 Aug 2023 07:56:52 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 879BE66FB9 for ; Thu, 24 Aug 2023 14:56:52 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9BF82C433C8; Thu, 24 Aug 2023 14:56:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1692889012; bh=gDZdQMC8xmHlWVRNxVrCcw0QsU40lnsmqfVwqvzEFvI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=E3VwSfR85gfpFjoBB1bHAmrlFcMgGmRTxt5/errtKk8lxFLrdX4SAYzczqOAu5MZN 22jrdQiY5UXsKBSTLKkOZAFgRgaVISDiqpJOMsVIfCaAyyJLomRZd3RVVlXEWoNRdE io1RLiqcXLjvkN+tchPtLCpqWGj3MjP5IqH0EgB4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, "Peter Zijlstra (Intel)" , "Borislav Petkov (AMD)" Subject: [PATCH 5.15 123/139] x86/cpu: Fix __x86_return_thunk symbol type Date: Thu, 24 Aug 2023 16:50:46 +0200 Message-ID: <20230824145028.838281897@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230824145023.559380953@linuxfoundation.org> References: <20230824145023.559380953@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Peter Zijlstra commit 77f67119004296a9b2503b377d610e08b08afc2a upstream. Commit fb3bd914b3ec ("x86/srso: Add a Speculative RAS Overflow mitigation") reimplemented __x86_return_thunk with a mix of SYM_FUNC_START and SYM_CODE_END, this is not a sane combination. Since nothing should ever actually 'CALL' this, make it consistently CODE. Fixes: fb3bd914b3ec ("x86/srso: Add a Speculative RAS Overflow mitigation") Signed-off-by: Peter Zijlstra (Intel) Signed-off-by: Borislav Petkov (AMD) Link: https://lore.kernel.org/r/20230814121148.571027074@infradead.org Signed-off-by: Greg Kroah-Hartman --- arch/x86/lib/retpoline.S | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/arch/x86/lib/retpoline.S +++ b/arch/x86/lib/retpoline.S @@ -204,7 +204,9 @@ SYM_CODE_END(srso_safe_ret) SYM_FUNC_END(srso_untrain_ret) __EXPORT_THUNK(srso_untrain_ret) -SYM_FUNC_START(__x86_return_thunk) +SYM_CODE_START(__x86_return_thunk) + UNWIND_HINT_FUNC + ANNOTATE_NOENDBR ALTERNATIVE_2 "jmp __ret", "call srso_safe_ret", X86_FEATURE_SRSO, \ "call srso_safe_ret_alias", X86_FEATURE_SRSO_ALIAS int3