[PATCH] keys/keyctl: Use kfree_rcu instead of kfree

From: Siddh Raman Pant <code@siddh.me>
To: David Howells <dhowells@redhat.com>,
	Jarkko Sakkinen <jarkko@kernel.org>,
	James Morris <jmorris@namei.org>,
	"Serge E. Hallyn" <serge@hallyn.com>
Cc: keyrings <keyrings@vger.kernel.org>,
	linux-security-modules <linux-security-module@vger.kernel.org>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	linux-kernel-mentees 
	<linux-kernel-mentees@lists.linuxfoundation.org>
Subject: [PATCH] keys/keyctl: Use kfree_rcu instead of kfree
Date: Sat, 23 Jul 2022 19:20:35 +0530	[thread overview]
Message-ID: <20220723135035.199188-1-code@siddh.me> (raw)

In keyctl_watch_key, use kfree_rcu() for freeing watch and wlist
as they support RCU and have an rcu_head in the struct definition.

Signed-off-by: Siddh Raman Pant <code@siddh.me>
---
 security/keys/keyctl.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/security/keys/keyctl.c b/security/keys/keyctl.c
index 96a92a645216..087fbc141cfd 100644
--- a/security/keys/keyctl.c
+++ b/security/keys/keyctl.c
@@ -1832,9 +1832,9 @@ long keyctl_watch_key(key_serial_t id, int watch_queue_fd, int watch_id)
 	}
 
 err_watch:
-	kfree(watch);
+	kfree_rcu(watch, rcu);
 err_wlist:
-	kfree(wlist);
+	kfree_rcu(wlist, rcu);
 err_wqueue:
 	put_watch_queue(wqueue);
 err_key:
-- 
2.35.1


