From nobody Wed Apr 8 01:18:42 2026 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 90D39C00140 for ; Wed, 24 Aug 2022 08:50:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232480AbiHXIuP (ORCPT ); Wed, 24 Aug 2022 04:50:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35226 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236023AbiHXItr (ORCPT ); Wed, 24 Aug 2022 04:49:47 -0400 Received: from esa4.hgst.iphmx.com (esa4.hgst.iphmx.com [216.71.154.42]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 46A028A1E2 for ; Wed, 24 Aug 2022 01:49:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1661330982; x=1692866982; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=4kZqvFG4tMiUnKB0w/rq1VrH8DwwrNQlje7Rk/MmMEQ=; b=ZuhcXayYC0xOYzdcpbiiObQxW+ta6+5H3uOUjvtU2JGD+V4rN3I+3TDu grwlu3SHZLI74udAfByYQcOh/3JvGdGV9YD5Dc8+JSNVI4xt4wjcD/p4v TgH9YfyVlPXrlkJH/vKLdCDF3S3RxMzKF3j9Ljf/Tv31e5PRO9MjHESzq 0LMVDrNkvjdWuZawbg2oux8I4qiY6X4C4DnaNxy7YnX6DzjnR82fCrL8K tEAd5XBIBjHWaKlBYjgoe0wnnaSIgQb4WUxXsqJUv0mGynaHtSyADnJiA 7wK2wGX3YHHaNC+M+5k/UxYpMn2+QjyqD++BUDepeknRDb3JT+8lkP8+v Q==; X-IronPort-AV: E=Sophos;i="5.93,260,1654531200"; d="scan'208";a="207973719" Received: from uls-op-cesaip01.wdc.com (HELO uls-op-cesaep01.wdc.com) ([199.255.45.14]) by ob1.hgst.iphmx.com with ESMTP; 24 Aug 2022 16:49:40 +0800 IronPort-SDR: bA2WFiaiXE2bPlpWnmrqAVV3vj2MAImSEz2m/xbuqoB1wFHFNZf9zURqRAOd3Rxm8EBsFvBY5y /HSZ0fvmsgLW771aNS1VpueRrzFEGpEgojTN+apAKtXoDZnzUHFENnFcf1ownkECelRxum8m0H tbIPDhf4QdN4a+7MnTRqFb5Xb0nY/Fv51WbHqLBBaKQ39OcSQ0u06m13yR3ASkO3SmIaToi4xu udwp508b9NopLSJRnfIYtZZf9LyBVDaOiDRMoHtXiKFXG7zzIyzlyPkJ6ZM/0WubxvkCuAD/ll gAM3eISBnkEgyHcz/HDGd7yi Received: from uls-op-cesaip01.wdc.com ([10.248.3.36]) by uls-op-cesaep01.wdc.com with ESMTP/TLS/ECDHE-RSA-AES128-GCM-SHA256; 24 Aug 2022 01:10:18 -0700 IronPort-SDR: aYy2ngGZRuaX5ZfUaVy9yvWD6gCrfGdmzX0SPZuoL8pJkiUMnuvy4EgHMN6Lc9MNN3IxeS834n mYPhxj5L67mTOCYOzq1s7Ll23K91bcy67c1imwcelZ79fzjufyor3NguFArPAV3FCH8hQBwXf7 qUC6KnkHFJMI0KYBl9BFQk+0zZbTuZ7NrgSjbSjKhKTWu3risa3NNgyfeWdY9eE9oks5ZGMRZ9 xIb1xOLPu3SS2eDJE4ByQc/JM85yGuU1kl9C0P7RAn/+jvvvQc6OPIsXNFrVN3DgHRIxkRUSph pYQ= WDCIronportException: Internal Received: from bsq92j3.ad.shared (HELO naota-xeon.wdc.com) ([10.225.50.4]) by uls-op-cesaip01.wdc.com with ESMTP; 24 Aug 2022 01:49:38 -0700 From: Naohiro Aota To: linux-mm@kvack.org, akpm@linux-foundation.org, x86@kernel.org Cc: linux-kernel@vger.kernel.org, Thomas Gleixner , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Naohiro Aota , Anshuman Khandual Subject: [PATCH] x86/mm: disable instrumentations of mm/pgprot.c Date: Wed, 24 Aug 2022 17:47:26 +0900 Message-Id: <20220824084726.2174758-1-naohiro.aota@wdc.com> X-Mailer: git-send-email 2.37.2 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The commit 4867fbbdd6b3 ("x86/mm: move protection_map[] inside the platform") moved accesses to protection_map[] from mem_encrypt_amd.c to pgprot.c. As a result, the accesses are now targets of KASAN (and other instrumentations), leading to the crash during the boot process. Disable the instrumentations for pgprot.c like commit 67bb8e999e0a ("x86/mm: Disable various instrumentations of mm/mem_encrypt.c and mm/tlb.c"). Before this patch, my AMD machine cannot boot since v6.0-rc1 with KASAN enabled, without anything printed. After the change, it successfully boots up. Cc: Anshuman Khandual Signed-off-by: Naohiro Aota --- arch/x86/mm/Makefile | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/mm/Makefile b/arch/x86/mm/Makefile index f8220fd2c169..829c1409ffbd 100644 --- a/arch/x86/mm/Makefile +++ b/arch/x86/mm/Makefile @@ -4,10 +4,12 @@ KCOV_INSTRUMENT_tlb.o :=3D n KCOV_INSTRUMENT_mem_encrypt.o :=3D n KCOV_INSTRUMENT_mem_encrypt_amd.o :=3D n KCOV_INSTRUMENT_mem_encrypt_identity.o :=3D n +KCOV_INSTRUMENT_pgprot.o :=3D n =20 KASAN_SANITIZE_mem_encrypt.o :=3D n KASAN_SANITIZE_mem_encrypt_amd.o :=3D n KASAN_SANITIZE_mem_encrypt_identity.o :=3D n +KASAN_SANITIZE_pgprot.o :=3D n =20 # Disable KCSAN entirely, because otherwise we get warnings that some func= tions # reference __initdata sections. @@ -17,6 +19,7 @@ ifdef CONFIG_FUNCTION_TRACER CFLAGS_REMOVE_mem_encrypt.o =3D -pg CFLAGS_REMOVE_mem_encrypt_amd.o =3D -pg CFLAGS_REMOVE_mem_encrypt_identity.o =3D -pg +CFLAGS_REMOVE_pgprot.o =3D -pg endif =20 obj-y :=3D init.o init_$(BITS).o fault.o ioremap.o extable.o mmap.o \ --=20 2.37.2