[PATCH v1] net/tcp: use kfree_sensitive() instend of kfree() in tcp_md5_twsk_free_rcu()

[Minjie Du]

key might contain private information, so better use
kfree_sensitive to free it.
In tcp_md5_twsk_free_rcu() use kfree_sensitive().

Signed-off-by: Minjie Du <duminjie@xxxxxxxx>
---
 net/ipv4/tcp_minisocks.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c
index a9807eeb311c..a7be78096783 100644
--- a/net/ipv4/tcp_minisocks.c
+++ b/net/ipv4/tcp_minisocks.c
@@ -368,7 +368,7 @@ static void tcp_md5_twsk_free_rcu(struct rcu_head *head)
 	struct tcp_md5sig_key *key;
 
 	key = container_of(head, struct tcp_md5sig_key, rcu);
-	kfree(key);
+	kfree_sensitive(key);
 	static_branch_slow_dec_deferred(&tcp_md5_needed);
 	tcp_md5_release_sigpool();
 }
-- 
2.39.0