From patchwork Tue Apr 5 07:19:21 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 12801317 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 A268BC4332F for ; Tue, 5 Apr 2022 09:13:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343932AbiDEJPt (ORCPT ); Tue, 5 Apr 2022 05:15:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52156 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244704AbiDEIwe (ORCPT ); Tue, 5 Apr 2022 04:52:34 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 25E7D18E24; Tue, 5 Apr 2022 01:42:22 -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 dfw.source.kernel.org (Postfix) with ESMTPS id B174B609D0; Tue, 5 Apr 2022 08:42:21 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9B576C385A1; Tue, 5 Apr 2022 08:42:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1649148141; bh=YQar6ezHZkPY8X6SYpKiX/qtDQj2Nb/lf+/JJVypKo8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ruQKorjoV32pU39DqmwNgMmTSWyTIew6GNyb5YXkNdhOMPzG+HkcfhR7LfiWR9dZE iF34rM5Egm5c+mApDleQUXP7EM6wjRzcWuiMFZqyO+E7xJVMM5GGGsQtKNesRitkJV 4W0FnMbcA9b3jT+mOMhZk8D8D/YVtKQqXHeMSP6s= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dave Kleikamp , Sumit Garg , James Bottomley , Jarkko Sakkinen , Mimi Zohar , David Howells , James Morris , "Serge E. Hallyn" , linux-integrity@vger.kernel.org, keyrings@vger.kernel.org, linux-security-module@vger.kernel.org, Sasha Levin Subject: [PATCH 5.16 0248/1017] KEYS: trusted: Avoid calling null function trusted_key_exit Date: Tue, 5 Apr 2022 09:19:21 +0200 Message-Id: <20220405070401.621647117@linuxfoundation.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220405070354.155796697@linuxfoundation.org> References: <20220405070354.155796697@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org From: Dave Kleikamp [ Upstream commit c5d1ed846e15090bc90dfdaafc07eac066e070bb ] If one loads and unloads the trusted module, trusted_key_exit can be NULL. Call it through static_call_cond() to avoid a kernel trap. Fixes: 5d0682be3189 ("KEYS: trusted: Add generic trusted keys framework") Signed-off-by: Dave Kleikamp Cc: Sumit Garg Cc: James Bottomley Cc: Jarkko Sakkinen Cc: Mimi Zohar Cc: David Howells Cc: James Morris Cc: "Serge E. Hallyn" Cc: linux-integrity@vger.kernel.org Cc: keyrings@vger.kernel.org Cc: linux-security-module@vger.kernel.org Reviewed-by: Jarkko Sakkinen Signed-off-by: Jarkko Sakkinen Signed-off-by: Sasha Levin --- security/keys/trusted-keys/trusted_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/security/keys/trusted-keys/trusted_core.c b/security/keys/trusted-keys/trusted_core.c index 5b35f1b87644..9b9d3ef79cbe 100644 --- a/security/keys/trusted-keys/trusted_core.c +++ b/security/keys/trusted-keys/trusted_core.c @@ -351,7 +351,7 @@ static int __init init_trusted(void) static void __exit cleanup_trusted(void) { - static_call(trusted_key_exit)(); + static_call_cond(trusted_key_exit)(); } late_initcall(init_trusted);