linux-kernel - [PATCH v17 05/12] KEYS: Move KEY_LOOKUP_ to include/linux/key.h and define KEY_LOOKUP

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220906121506.165001-1-roberto.sassu@huaweicloud.com>
Date:   Tue,  6 Sep 2022 14:15:06 +0200
From:   Roberto Sassu <roberto.sassu@...weicloud.com>
To:     jarkko@...nel.org
Cc:     andrii@...nel.org, ast@...nel.org, bpf@...r.kernel.org,
        daniel@...earbox.net, deso@...teo.net, dhowells@...hat.com,
        haoluo@...gle.com, jmorris@...ei.org, john.fastabend@...il.com,
        jolsa@...nel.org, keyrings@...r.kernel.org, kpsingh@...nel.org,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        linux-security-module@...r.kernel.org, martin.lau@...ux.dev,
        memxor@...il.com, mingo@...hat.com, mykolal@...com,
        paul@...l-moore.com, roberto.sassu@...wei.com,
        roberto.sassu@...weicloud.com, rostedt@...dmis.org, sdf@...gle.com,
        serge@...lyn.com, shuah@...nel.org, song@...nel.org, yhs@...com
Subject: [PATCH v17 05/12] KEYS: Move KEY_LOOKUP_ to include/linux/key.h and define KEY_LOOKUP_ALL

From: Roberto Sassu <roberto.sassu@...wei.com>

In preparation for the patch that introduces the bpf_lookup_user_key() eBPF
kfunc, move KEY_LOOKUP_ definitions to include/linux/key.h, to be able to
validate the kfunc parameters. Add them to enum key_lookup_flag, so that
all the current ones and the ones defined in the future are automatically
exported through BTF and available to eBPF programs.

Also, add KEY_LOOKUP_ALL to the enum, with the logical OR of currently
defined flags as value, to facilitate checking whether a variable contains
only those flags.

Signed-off-by: Roberto Sassu <roberto.sassu@...wei.com>
---
 include/linux/key.h      | 6 ++++++
 security/keys/internal.h | 2 --
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/include/linux/key.h b/include/linux/key.h
index 7febc4881363..d27477faf00d 100644
--- a/include/linux/key.h
+++ b/include/linux/key.h
@@ -88,6 +88,12 @@ enum key_need_perm {
 	KEY_DEFER_PERM_CHECK,	/* Special: permission check is deferred */
 };
 
+enum key_lookup_flag {
+	KEY_LOOKUP_CREATE = 0x01,
+	KEY_LOOKUP_PARTIAL = 0x02,
+	KEY_LOOKUP_ALL = (KEY_LOOKUP_CREATE | KEY_LOOKUP_PARTIAL),
+};
+
 struct seq_file;
 struct user_struct;
 struct signal_struct;
diff --git a/security/keys/internal.h b/security/keys/internal.h
index 9b9cf3b6fcbb..3c1e7122076b 100644
--- a/security/keys/internal.h
+++ b/security/keys/internal.h
@@ -165,8 +165,6 @@ extern struct key *request_key_and_link(struct key_type *type,
 
 extern bool lookup_user_key_possessed(const struct key *key,
 				      const struct key_match_data *match_data);
-#define KEY_LOOKUP_CREATE	0x01
-#define KEY_LOOKUP_PARTIAL	0x02
 
 extern long join_session_keyring(const char *name);
 extern void key_change_session_keyring(struct callback_head *twork);
-- 
2.25.1