From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4268A1863 for ; Wed, 28 Dec 2022 14:56:36 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B5769C433D2; Wed, 28 Dec 2022 14:56:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1672239396; bh=ILrNE0GOn0fsPLQJHEDMlh0tRaOCV/GENeqo4gxUkrY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YSmSlQj8BGuVEU392EK/q7vjKIkikasJV6e+1TrtZY6aI/m88g5zrty9fjphOpl4V ZV+C8/G5RPQAfrP77oTjGaSwgMf3p4msG/+Ur2r81qoyeC1DezytYHEEZXXdvglb6H anhC6RCd/J86cizcdUnjcx93+5lI+dOK2eaW3xuU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Marco Elver , Dmitry Vyukov , "Paul E. McKenney" , Sasha Levin Subject: [PATCH 6.0 0022/1073] objtool, kcsan: Add volatile read/write instrumentation to whitelist Date: Wed, 28 Dec 2022 15:26:50 +0100 Message-Id: <20221228144328.754423489@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20221228144328.162723588@linuxfoundation.org> References: <20221228144328.162723588@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Marco Elver [ Upstream commit 63646fcba5bb4b59a19031c21913f94e46a3d0d4 ] 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_volatile_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 Signed-off-by: Sasha Levin --- tools/objtool/check.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/tools/objtool/check.c b/tools/objtool/check.c index e55fdf952a3a..67afdce3421f 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -999,6 +999,16 @@ static const char *uaccess_safe_builtin[] = { "__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", -- 2.35.1