From nobody Tue Apr 7 23:58:58 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 28B7FC4332F for ; Wed, 19 Oct 2022 23:04:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229657AbiJSXET (ORCPT ); Wed, 19 Oct 2022 19:04:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38186 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231436AbiJSXEO (ORCPT ); Wed, 19 Oct 2022 19:04:14 -0400 Received: from sin.source.kernel.org (sin.source.kernel.org [IPv6:2604:1380:40e1:4800::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F375B1BB946 for ; Wed, 19 Oct 2022 16:04:11 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sin.source.kernel.org (Postfix) with ESMTPS id 1D3B6CE247B for ; Wed, 19 Oct 2022 23:04:09 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6E0A5C433C1; Wed, 19 Oct 2022 23:04:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1666220647; bh=7lFI8jwYjTgUuAGoBEvqrl/zt90PET5zynmRHnpkDdQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YrX9Uiwq9Ld4pObV/swVMAbLV4J/q8QJ+0XwveQJ3YWIHa6NxjC1TggJimC5/JPSX s82EOo+IMq0oQpD2fIhpstg/gLAgLD4GQivPTM2FL6W2jzG5vmFZ+A8dK/qmOdopHx LrtuclBvlUEREXEM01VFp6kUiU/KtPl2PPPsRdj4ocvMm73gfv9xkAhp8KxPzPFSa4 6eBu/RI051dPFB+7uWcnr2FFu7pcSvxqNefJ3PymkM3+9TdsDv0z/u/oPvxwXfmqzT GCP1edBgu/TDKecIkfcN2MO7tYaUTNOadBqc35ePGxxZBvZNbWngPZ6mya4HHUGPq7 4r2momI8VJHzg== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id 2C6CB5C0879; Wed, 19 Oct 2022 16:04:07 -0700 (PDT) From: "Paul E. McKenney" To: linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, kernel-team@fb.com, mingo@kernel.org Cc: elver@google.com, andreyknvl@google.com, glider@google.com, dvyukov@google.com, cai@lca.pw, boqun.feng@gmail.com, "Paul E . McKenney" Subject: [PATCH kcsan 2/3] objtool, kcsan: Add volatile read/write instrumentation to whitelist Date: Wed, 19 Oct 2022 16:04:04 -0700 Message-Id: <20221019230405.2502089-2-paulmck@kernel.org> X-Mailer: git-send-email 2.31.1.189.g2e36527f23 In-Reply-To: <20221019230356.GA2501950@paulmck-ThinkPad-P17-Gen-1> References: <20221019230356.GA2501950@paulmck-ThinkPad-P17-Gen-1> 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" From: Marco Elver Adds KCSAN's volatile instrumentation to objtool's uaccess whitelist. Recent kernel change have shown that this was missing from the uaccess whitelist (since the first upstreamed version of KCSAN): mm/gup.o: warning: objtool: fault_in_readable+0x101: call to __tsan_volat= ile_write1() with UACCESS enabled Fixes: 75d75b7a4d54 ("kcsan: Support distinguishing volatile accesses") Signed-off-by: Marco Elver Reviewed-by: Dmitry Vyukov Signed-off-by: Paul E. McKenney --- tools/objtool/check.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/tools/objtool/check.c b/tools/objtool/check.c index 43ec14c29a60c..a7f1e6c8bb0a7 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -999,6 +999,16 @@ static const char *uaccess_safe_builtin[] =3D { "__tsan_read_write4", "__tsan_read_write8", "__tsan_read_write16", + "__tsan_volatile_read1", + "__tsan_volatile_read2", + "__tsan_volatile_read4", + "__tsan_volatile_read8", + "__tsan_volatile_read16", + "__tsan_volatile_write1", + "__tsan_volatile_write2", + "__tsan_volatile_write4", + "__tsan_volatile_write8", + "__tsan_volatile_write16", "__tsan_atomic8_load", "__tsan_atomic16_load", "__tsan_atomic32_load", --=20 2.31.1.189.g2e36527f23