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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 86AEBC10DC1 for ; Fri, 22 Jan 2021 19:59:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6181123B08 for ; Fri, 22 Jan 2021 19:59:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730818AbhAVT6w (ORCPT ); Fri, 22 Jan 2021 14:58:52 -0500 Received: from mail.kernel.org ([198.145.29.99]:36978 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727095AbhAVOPn (ORCPT ); Fri, 22 Jan 2021 09:15:43 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 3C58F23B06; Fri, 22 Jan 2021 14:11:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1611324719; bh=X+DZ+fM7wZtI5dMsVocTCJ0dPwP6G9Bldkj+sxRzR6g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zVyF7YOpy8zt0us50iqN9XIO1XFZr75BoXZu7yED4adHbePFyXrqytMz7iqoKVD1x L5quPn3V7hpUGK1I8Wf6ewCPBJdqxbTm2ZsW0w1agrT2ddysc/o/6QekAl7u3bM/sL t8JS7NlETqi6yEZJkR5zhOrXZutGHG13gkAI8I8I= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Russell King , Arnd Bergmann , Will Deacon , Nathan Chancellor , Nick Desaulniers , Linus Torvalds , Theodore Tso , Florian Weimer , Peter Zijlstra , Catalin Marinas Subject: [PATCH 4.9 24/35] compiler.h: Raise minimum version of GCC to 5.1 for arm64 Date: Fri, 22 Jan 2021 15:10:26 +0100 Message-Id: <20210122135733.287240739@linuxfoundation.org> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210122135732.357969201@linuxfoundation.org> References: <20210122135732.357969201@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Will Deacon commit dca5244d2f5b94f1809f0c02a549edf41ccd5493 upstream. GCC versions >= 4.9 and < 5.1 have been shown to emit memory references beyond the stack pointer, resulting in memory corruption if an interrupt is taken after the stack pointer has been adjusted but before the reference has been executed. This leads to subtle, infrequent data corruption such as the EXT4 problems reported by Russell King at the link below. Life is too short for buggy compilers, so raise the minimum GCC version required by arm64 to 5.1. Reported-by: Russell King Suggested-by: Arnd Bergmann Signed-off-by: Will Deacon Tested-by: Nathan Chancellor Reviewed-by: Nick Desaulniers Reviewed-by: Nathan Chancellor Acked-by: Linus Torvalds Cc: Cc: Theodore Ts'o Cc: Florian Weimer Cc: Peter Zijlstra Cc: Nick Desaulniers Link: https://lore.kernel.org/r/20210105154726.GD1551@shell.armlinux.org.uk Link: https://lore.kernel.org/r/20210112224832.10980-1-will@kernel.org Signed-off-by: Catalin Marinas [will: backport to 4.4.y/4.9.y/4.14.y] Signed-off-by: Will Deacon Signed-off-by: Greg Kroah-Hartman --- include/linux/compiler-gcc.h | 6 ++++++ 1 file changed, 6 insertions(+) --- a/include/linux/compiler-gcc.h +++ b/include/linux/compiler-gcc.h @@ -149,6 +149,12 @@ #if GCC_VERSION < 30200 # error Sorry, your compiler is too old - please upgrade it. +#elif defined(CONFIG_ARM64) && GCC_VERSION < 50100 +/* + * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63293 + * https://lore.kernel.org/r/20210107111841.GN1551@shell.armlinux.org.uk + */ +# error Sorry, your version of GCC is too old - please use 5.1 or newer. #endif #if GCC_VERSION < 30300