linux-kernel - [PATCH 3/7] keys: Move key_get() out of line so a tracepoint can be added

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: <20240821123616.60401-4-dhowells@redhat.com>
Date: Wed, 21 Aug 2024 13:36:11 +0100
From: David Howells <dhowells@...hat.com>
To: Jarkko Sakkinen <jarkko@...nel.org>
Cc: David Howells <dhowells@...hat.com>,
	keyrings@...r.kernel.org,
	linux-security-module@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 3/7] keys: Move key_get() out of line so a tracepoint can be added

Move key_get() out of line so that a tracepoint can be added into it
without incurring circular header dependencies or overly expanding the
callers.

Signed-off-by: David Howells <dhowells@...hat.com>
cc: Jarkko Sakkinen <jarkko@...nel.org>
cc: keyrings@...r.kernel.org
cc: linux-security-module@...r.kernel.org
---
 include/linux/key.h |  6 +-----
 security/keys/key.c | 14 ++++++++++++++
 2 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/include/linux/key.h b/include/linux/key.h
index 943a432da3ae..08062b4f807c 100644
--- a/include/linux/key.h
+++ b/include/linux/key.h
@@ -299,6 +299,7 @@ extern struct key *key_alloc(struct key_type *type,
 
 extern void key_revoke(struct key *key);
 extern void key_invalidate(struct key *key);
+struct key *key_get(struct key *key);
 extern void key_put(struct key *key);
 extern bool key_put_tag(struct key_tag *tag);
 extern void key_remove_domain(struct key_tag *domain_tag);
@@ -309,11 +310,6 @@ static inline struct key *__key_get(struct key *key)
 	return key;
 }
 
-static inline struct key *key_get(struct key *key)
-{
-	return key ? __key_get(key) : key;
-}
-
 static inline void key_ref_put(key_ref_t key_ref)
 {
 	key_put(key_ref_to_ptr(key_ref));
diff --git a/security/keys/key.c b/security/keys/key.c
index 3d7d185019d3..14c7ee77ea15 100644
--- a/security/keys/key.c
+++ b/security/keys/key.c
@@ -635,6 +635,20 @@ int key_reject_and_link(struct key *key,
 }
 EXPORT_SYMBOL(key_reject_and_link);
 
+/**
+ * key_get - Get a reference on a key
+ * @key: The key to get a reference on.
+ *
+ * Get a reference on a key, if not NULL, and return the parameter.
+ */
+struct key *key_get(struct key *key)
+{
+	if (key)
+		refcount_inc(&key->usage);
+	return key;
+}
+EXPORT_SYMBOL(key_get);
+
 /**
  * key_put - Discard a reference to a key.
  * @key: The key to discard a reference from.