From patchwork Wed Feb 21 21:24:43 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Seth Forshee (DigitalOcean)" X-Patchwork-Id: 13566386 X-Patchwork-Delegate: paul@paul-moore.com 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 A9BA1129A8D; Wed, 21 Feb 2024 21:25:06 +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=1708550706; cv=none; b=hlK3VS9pe3vS8yvfj6p1JgKAw1i++EvxUKM9r2uLCFfTawzXh1aUUYaxcEPaZtN8NDRjnFibz2GGFQ2bXtodeT4ciDAqwiKcCqdT+e/ffwwnZxNaGirOogw/ACLF/zusf48N+svsZwe6IbRVA9tEvFvTxfnVK/EudO6j+r1yjlc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708550706; c=relaxed/simple; bh=pUWNt9mRsWKZJ1yXibvTabhp6NyYRplMYf4ol2PV1qs=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=myVhcc/Iz1ClZYr66H2sFLie8UTmCTDeYLHO1hr/dkFtGfOEcZS/XNdx+mdZrgR70f8Lrk8tG+fa9H9PIwC0fHG3aafF0Ju/vNWwx/GV9M9nfBIgOpp6TlJ/0Vua29DjZbxlKQ4m0WwL+As7HkdlNUY4K33S/feof2s/W/SHS40= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=OE5GYKrN; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="OE5GYKrN" Received: by smtp.kernel.org (Postfix) with ESMTPS id 88E21C3278A; Wed, 21 Feb 2024 21:25:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1708550706; bh=pUWNt9mRsWKZJ1yXibvTabhp6NyYRplMYf4ol2PV1qs=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=OE5GYKrNXbhCRoyzeq1Uxwh+7AvoyiVU4RFHWWAkBoyH2PSfR8louMEYypCkFSBHp /QK88SLmFCXh8vrQRwW+V2vYmQew9jhciIYuZIwtD6xTZjSIyY1SE3xc655mOeYw1K fw6eKTosn8jH4AMfW10Lsbdwxj/xat0kDSqrBjrzfKG+wqDiStz/Dt/Wvp0ddA9006 TWwXHU7e+0tqwxbmUtQi3P2onMllhLHQvTIIMzq1bttKhrawupE4GXNXfGp+rOVXV9 kheVg+z1IPObzaqroVcFaD9glXefaelF990s79FRkFSxhQabeAsHZZj5NNSuc2QG4P QLQVMHn9/W5BA== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 76D09C5478C; Wed, 21 Feb 2024 21:25:06 +0000 (UTC) From: "Seth Forshee (DigitalOcean)" Date: Wed, 21 Feb 2024 15:24:43 -0600 Subject: [PATCH v2 12/25] selinux: add hooks for fscaps operations Precedence: bulk X-Mailing-List: audit@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240221-idmap-fscap-refactor-v2-12-3039364623bd@kernel.org> References: <20240221-idmap-fscap-refactor-v2-0-3039364623bd@kernel.org> In-Reply-To: <20240221-idmap-fscap-refactor-v2-0-3039364623bd@kernel.org> To: Christian Brauner , Seth Forshee , Serge Hallyn , Paul Moore , Eric Paris , James Morris , Alexander Viro , Jan Kara , Stephen Smalley , Ondrej Mosnacek , Casey Schaufler , Mimi Zohar , Roberto Sassu , Dmitry Kasatkin , Eric Snowberg , "Matthew Wilcox (Oracle)" , Jonathan Corbet , Miklos Szeredi , Amir Goldstein Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-security-module@vger.kernel.org, audit@vger.kernel.org, selinux@vger.kernel.org, linux-integrity@vger.kernel.org, linux-doc@vger.kernel.org, linux-unionfs@vger.kernel.org X-Mailer: b4 0.12.4 X-Developer-Signature: v=1; a=openpgp-sha256; l=2028; i=sforshee@kernel.org; h=from:subject:message-id; bh=pUWNt9mRsWKZJ1yXibvTabhp6NyYRplMYf4ol2PV1qs=; =?utf-8?q?b=3DowEBbQGS/pANAwAKAVMDma7l9DHJAcsmYgBl1mojvJhyZw9emud3TEu0eTTg0?= =?utf-8?q?ZvRpxQbx/wYTlv3_1foWLWqJATMEAAEKAB0WIQSQnt+rKAvnETy4Hc9TA5mu5fQxy?= =?utf-8?q?QUCZdZqIwAKCRBTA5mu5fQxyUwiB/_94Hwww+Nvwr2i0mm92V1m/muLDxNZ3ichSg?= =?utf-8?q?SbVTXRmFnGLWiqqjMZl3IjV8bIU9kY0uE4x7zfEpBpX_rTcdD3t9JeMPtm8WcBoFc?= =?utf-8?q?lqIlyRYkgBIkPLFiY2Vb+GmlW/HPp0p7gXrkdXLnqRb2JLOEGjY3ReRrm_gx2B15b?= =?utf-8?q?lpH1tEHAitlNwTMg6Wlt+MkUqvPIXsiYP4hseEFG3GRmrmtLK8VDfPFmy0HO4Mkay?= =?utf-8?q?GhMzDS_piT9CYjbYEIlnSpJFWwC7agQMDtzoUNqlU4zRIOSjOTGd+/O8lHnI0mqol?= =?utf-8?q?xe+jhCS0DXiQ3StnEUTj?= AJXJqyr0z/OYbUCf//HFYSGghhbxur X-Developer-Key: i=sforshee@kernel.org; a=openpgp; fpr=2ABCA7498D83E1D32D51D3B5AB4800A62DB9F73A X-Endpoint-Received: by B4 Relay for sforshee@kernel.org/default with auth_id=103 Add hooks for set/get/remove fscaps operations which perform the same checks as the xattr hooks would have done for XATTR_NAME_CAPS. Signed-off-by: Seth Forshee (DigitalOcean) --- security/selinux/hooks.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index a6bf90ace84c..da129a387b34 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -3367,6 +3367,29 @@ static int selinux_inode_removexattr(struct mnt_idmap *idmap, return -EACCES; } +static int selinux_inode_set_fscaps(struct mnt_idmap *idmap, + struct dentry *dentry, + const struct vfs_caps *caps, int flags) +{ + return dentry_has_perm(current_cred(), dentry, FILE__SETATTR); +} + +static int selinux_inode_get_fscaps(struct mnt_idmap *idmap, + struct dentry *dentry) +{ + return dentry_has_perm(current_cred(), dentry, FILE__GETATTR); +} + +static int selinux_inode_remove_fscaps(struct mnt_idmap *idmap, + struct dentry *dentry) +{ + int rc = cap_inode_removexattr(idmap, dentry, XATTR_NAME_CAPS); + if (rc) + return rc; + + return dentry_has_perm(current_cred(), dentry, FILE__SETATTR); +} + static int selinux_path_notify(const struct path *path, u64 mask, unsigned int obj_type) { @@ -7165,6 +7188,9 @@ static struct security_hook_list selinux_hooks[] __ro_after_init = { LSM_HOOK_INIT(inode_set_acl, selinux_inode_set_acl), LSM_HOOK_INIT(inode_get_acl, selinux_inode_get_acl), LSM_HOOK_INIT(inode_remove_acl, selinux_inode_remove_acl), + LSM_HOOK_INIT(inode_set_fscaps, selinux_inode_set_fscaps), + LSM_HOOK_INIT(inode_get_fscaps, selinux_inode_get_fscaps), + LSM_HOOK_INIT(inode_remove_fscaps, selinux_inode_remove_fscaps), LSM_HOOK_INIT(inode_getsecurity, selinux_inode_getsecurity), LSM_HOOK_INIT(inode_setsecurity, selinux_inode_setsecurity), LSM_HOOK_INIT(inode_listsecurity, selinux_inode_listsecurity),