From patchwork Fri Mar 12 00:49:13 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sami Tolvanen X-Patchwork-Id: 12133511 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=-26.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=unavailable 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 46AE9C433E9 for ; Fri, 12 Mar 2021 00:50:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2354A64F82 for ; Fri, 12 Mar 2021 00:50:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231825AbhCLAuQ (ORCPT ); Thu, 11 Mar 2021 19:50:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52144 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231489AbhCLAtn (ORCPT ); Thu, 11 Mar 2021 19:49:43 -0500 Received: from mail-qt1-x849.google.com (mail-qt1-x849.google.com [IPv6:2607:f8b0:4864:20::849]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1F790C061762 for ; Thu, 11 Mar 2021 16:49:43 -0800 (PST) Received: by mail-qt1-x849.google.com with SMTP id b18so3030076qte.21 for ; Thu, 11 Mar 2021 16:49:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=Mjpx22b6GuQLoGn4NzDCeA9C1v5eOn+//WEZjXFxGag=; b=p1YJgca/l7E3iFpL3NEl23p9rq3uH3cCDpSNLobzpaRdN94bWmg2TLWliG4OTlDgNF b20mw7m0miBH3TC5NiTSrjOvpsxd/EdcZEMNofKjul69T290228EfMRqi263sZ7ZcaJy z2WDWEy/jTh6Vd9HVohxsoV9lhuJlYgs7JX6zxyvJVOc46TYiMufhQFP5HjsfNJNllhZ x42Xb3kCdRnLN7XJ1Ai7S9r8k9w7c9TnY3ZIZBGaRP2A6WNp1d5UesIsRKD8bTflljM+ ApPAV1OH/Bn5BUKlPk/oyAren6W77UIuvmnx4NkfwgRZxTrZ2vrS8diyGNcOaxyVNLg4 QIsw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=Mjpx22b6GuQLoGn4NzDCeA9C1v5eOn+//WEZjXFxGag=; b=J0TquO+FDU83/i+yQKOUbxRvjp+E9bRLYwimd9+dXkfR6lu96AGS56ks3VQoTB5ZEM eUWBKcY6K6lv+LaYr4UUO1KaTrIOi86GXrjQCd/3IPALwwEGVwylwIrBCq5aHxNJDsGQ 4607Qe+eGcL1kwtdXBpCdoJR7nuUfCkrusFMBCNgdFxtO9hbQHVRkWEpHzMhNyQR1U6w ZAiZfk/OOGbZaEuXaZvY+C6aLQQsSXoqrktWKlGS/cxW26d6ZTerQcw3G55sj4H6bMdC lhS1xMpEjInUU47+9yqr5zc9AZTGGN1LbrJlNWNyspo5MNaLDHJgkwZf0cM+h2bEi0x/ /jSw== X-Gm-Message-State: AOAM533igkMt5M26A6/mIt4DbLCpsh/btuELwiNSkT5f+bmPyAV2H7N8 F6JYozmSLmTt7EH2QO8uLHN6KhB4T6MDZPt67k4= X-Google-Smtp-Source: ABdhPJwmy8g4J1Glwh+9/Qdeqiq2sG1+WJpaNKE+Qhd9e3mgm3N1f00E1AniVKdzTbmiO2hHWYG9eMucONFWzKoR1oM= X-Received: from samitolvanen1.mtv.corp.google.com ([2620:15c:201:2:c86b:8269:af92:55a]) (user=samitolvanen job=sendgmr) by 2002:ad4:4745:: with SMTP id c5mr10451143qvx.39.1615510182313; Thu, 11 Mar 2021 16:49:42 -0800 (PST) Date: Thu, 11 Mar 2021 16:49:13 -0800 In-Reply-To: <20210312004919.669614-1-samitolvanen@google.com> Message-Id: <20210312004919.669614-12-samitolvanen@google.com> Mime-Version: 1.0 References: <20210312004919.669614-1-samitolvanen@google.com> X-Mailer: git-send-email 2.31.0.rc2.261.g7f71774620-goog Subject: [PATCH 11/17] psci: use __pa_function for cpu_resume From: Sami Tolvanen To: Kees Cook Cc: Nathan Chancellor , Nick Desaulniers , Masahiro Yamada , Will Deacon , Jessica Yu , Arnd Bergmann , Tejun Heo , bpf@vger.kernel.org, linux-hardening@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kbuild@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Sami Tolvanen Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org With CONFIG_CFI_CLANG, the compiler replaces function pointers with jump table addresses, which results in __pa_symbol returning the physical address of the jump table entry. As the jump table contains an immediate jump to an EL1 virtual address, this typically won't work as intended. Use __pa_function instead to get the address to cpu_resume. Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook --- drivers/firmware/psci/psci.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/firmware/psci/psci.c b/drivers/firmware/psci/psci.c index f5fc429cae3f..facd3cce3244 100644 --- a/drivers/firmware/psci/psci.c +++ b/drivers/firmware/psci/psci.c @@ -326,7 +326,7 @@ static int psci_suspend_finisher(unsigned long state) { u32 power_state = state; - return psci_ops.cpu_suspend(power_state, __pa_symbol(cpu_resume)); + return psci_ops.cpu_suspend(power_state, __pa_function(cpu_resume)); } int psci_cpu_suspend_enter(u32 state) @@ -345,7 +345,7 @@ int psci_cpu_suspend_enter(u32 state) static int psci_system_suspend(unsigned long unused) { return invoke_psci_fn(PSCI_FN_NATIVE(1_0, SYSTEM_SUSPEND), - __pa_symbol(cpu_resume), 0, 0); + __pa_function(cpu_resume), 0, 0); } static int psci_system_suspend_enter(suspend_state_t state)