From patchwork Tue Feb 11 16:57:46 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christian Brauner X-Patchwork-Id: 11375951 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 19A2613A4 for ; Tue, 11 Feb 2020 16:59:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EE02D2168B for ; Tue, 11 Feb 2020 16:59:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731015AbgBKQ7o (ORCPT ); Tue, 11 Feb 2020 11:59:44 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:53481 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731009AbgBKQ7n (ORCPT ); Tue, 11 Feb 2020 11:59:43 -0500 Received: from ip5f5bf7ec.dynamic.kabel-deutschland.de ([95.91.247.236] helo=wittgenstein.fritz.box) by youngberry.canonical.com with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from ) id 1j1Ysc-00014T-Pt; Tue, 11 Feb 2020 16:59:22 +0000 From: Christian Brauner To: =?utf-8?q?St=C3=A9phane_Graber?= , "Eric W. Biederman" , Aleksa Sarai , Jann Horn Cc: smbarber@chromium.org, Alexander Viro , Alexey Dobriyan , Serge Hallyn , James Morris , Kees Cook , Jonathan Corbet , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, containers@lists.linux-foundation.org, linux-security-module@vger.kernel.org, linux-api@vger.kernel.org, Christian Brauner Subject: [PATCH 17/24] sys: __sys_setfsgid(): handle fsid mappings Date: Tue, 11 Feb 2020 17:57:46 +0100 Message-Id: <20200211165753.356508-18-christian.brauner@ubuntu.com> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200211165753.356508-1-christian.brauner@ubuntu.com> References: <20200211165753.356508-1-christian.brauner@ubuntu.com> MIME-Version: 1.0 Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: Switch setfsgid() to lookup fsids in the fsid mappings. If no fsid mappings are setup the behavior is unchanged, i.e. fsids are looked up in the id mappings. Signed-off-by: Christian Brauner --- kernel/sys.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/sys.c b/kernel/sys.c index ae376d32c1e3..b89334ad0908 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -847,9 +847,9 @@ long __sys_setfsgid(gid_t gid) kgid_t kgid; old = current_cred(); - old_fsgid = from_kgid_munged(old->user_ns, old->fsgid); + old_fsgid = from_kfsgid_munged(old->user_ns, old->fsgid); - kgid = make_kgid(old->user_ns, gid); + kgid = make_kfsgid(old->user_ns, gid); if (!gid_valid(kgid)) return old_fsgid;