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 EE2DB1FBC8C; Mon, 2 Jun 2025 14:06:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748873175; cv=none; b=uLSMXBJ4y/7B+EjkHoeIObmvr1j6RHdhpGnniVJr7G6y34gR18Y1TUa1Qf7KtBFlfgEWpMPWpQlfQFG/XSOGrdjPGjSCn6rPHAeuMrS9k1tY2GYv1BBJySASuLF/AvACbqJ6Ho8o4NJDEsA0I3eYtXwhnnDMP0KXPlHK5apQpRM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748873175; c=relaxed/simple; bh=9CvzfTSd6r0FZUqUGRpIYrZbGioE+kiMcLDgm2l9AOk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=lUZfDXy9JVlraaf5ULLjwe9EP/mYk5VMR/a9B6C3bhUgWwbVOP84SqMqrjkq5nVdQIa1YTTl0Fqof7fw0dud68kU9VjGRO6xXdV/AW8O+PCgQqKehhRL/efvubfVG6kmDVaL/adfwFfGQmkVcIad9imzHMZXNO9xFZofg+E6qWA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=bLh2mTs6; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="bLh2mTs6" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 72E0BC4CEEB; Mon, 2 Jun 2025 14:06:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1748873174; bh=9CvzfTSd6r0FZUqUGRpIYrZbGioE+kiMcLDgm2l9AOk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bLh2mTs6hOLVb5yfjv1O6bEIQU+j9ijfmPCu6TjT+mV31EMocCNGwiPkp/N3jtYu7 l8rBiPdUQQFvv4O7b13KbeOHqbFXPXXeaKJ+BD33oddSHdt25ddpcunfVR4EyoS4VF yKa4ejxPh5fg7btI+rFLNZtdGbXc0tzlAUOFeSKk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Josh Poimboeuf , Ingo Molnar , Linus Torvalds , Sasha Levin Subject: [PATCH 6.6 061/444] objtool: Properly disable uaccess validation Date: Mon, 2 Jun 2025 15:42:05 +0200 Message-ID: <20250602134343.402045337@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250602134340.906731340@linuxfoundation.org> References: <20250602134340.906731340@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Josh Poimboeuf [ Upstream commit e1a9dda74dbffbc3fa2069ff418a1876dc99fb14 ] If opts.uaccess isn't set, the uaccess validation is disabled, but only partially: it doesn't read the uaccess_safe_builtin list but still tries to do the validation. Disable it completely to prevent false warnings. Signed-off-by: Josh Poimboeuf Signed-off-by: Ingo Molnar Cc: Linus Torvalds Link: https://lore.kernel.org/r/0e95581c1d2107fb5f59418edf2b26bba38b0cbb.1742852846.git.jpoimboe@kernel.org Signed-off-by: Sasha Levin --- tools/objtool/check.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/tools/objtool/check.c b/tools/objtool/check.c index a1b14378bab04..f5af48502c9c8 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -3287,7 +3287,7 @@ static int handle_insn_ops(struct instruction *insn, if (update_cfi_state(insn, next_insn, &state->cfi, op)) return 1; - if (!insn->alt_group) + if (!opts.uaccess || !insn->alt_group) continue; if (op->dest.type == OP_DEST_PUSHF) { @@ -3754,6 +3754,9 @@ static int validate_branch(struct objtool_file *file, struct symbol *func, return 0; case INSN_STAC: + if (!opts.uaccess) + break; + if (state.uaccess) { WARN_INSN(insn, "recursive UACCESS enable"); return 1; @@ -3763,6 +3766,9 @@ static int validate_branch(struct objtool_file *file, struct symbol *func, break; case INSN_CLAC: + if (!opts.uaccess) + break; + if (!state.uaccess && func) { WARN_INSN(insn, "redundant UACCESS disable"); return 1; @@ -4238,7 +4244,8 @@ static int validate_symbol(struct objtool_file *file, struct section *sec, if (!insn || insn->ignore || insn->visited) return 0; - state->uaccess = sym->uaccess_safe; + if (opts.uaccess) + state->uaccess = sym->uaccess_safe; ret = validate_branch(file, insn_func(insn), insn, *state); if (ret) -- 2.39.5