[PATCH 5.10 075/112] net/tls: Check for errors in tls_device_init

[Greg Kroah-Hartman]

From: Tariq Toukan <tariqt@xxxxxxxxxx>

[ Upstream commit 3d8c51b25a235e283e37750943bbf356ef187230 ]

Add missing error checks in tls_device_init.

Fixes: e8f69799810c ("net/tls: Add generic NIC offload infrastructure")
Reported-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Reviewed-by: Maxim Mikityanskiy <maximmi@xxxxxxxxxx>
Signed-off-by: Tariq Toukan <tariqt@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220714070754.1428-1-tariqt@xxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 include/net/tls.h    | 4 ++--
 net/tls/tls_device.c | 4 ++--
 net/tls/tls_main.c   | 7 ++++++-
 3 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/include/net/tls.h b/include/net/tls.h
index 745b3bc6ce91..d9cb597cab46 100644
--- a/include/net/tls.h
+++ b/include/net/tls.h
@@ -707,7 +707,7 @@ int tls_sw_fallback_init(struct sock *sk,
 			 struct tls_crypto_info *crypto_info);
 
 #ifdef CONFIG_TLS_DEVICE
-void tls_device_init(void);
+int tls_device_init(void);
 void tls_device_cleanup(void);
 void tls_device_sk_destruct(struct sock *sk);
 int tls_set_device_offload(struct sock *sk, struct tls_context *ctx);
@@ -727,7 +727,7 @@ static inline bool tls_is_sk_rx_device_offloaded(struct sock *sk)
 	return tls_get_ctx(sk)->rx_conf == TLS_HW;
 }
 #else
-static inline void tls_device_init(void) {}
+static inline int tls_device_init(void) { return 0; }
 static inline void tls_device_cleanup(void) {}
 
 static inline int
diff --git a/net/tls/tls_device.c b/net/tls/tls_device.c
index 3c82286e5bcc..6ae2ce411b4b 100644
--- a/net/tls/tls_device.c
+++ b/net/tls/tls_device.c
@@ -1390,9 +1390,9 @@ static struct notifier_block tls_dev_notifier = {
 	.notifier_call	= tls_dev_event,
 };
 
-void __init tls_device_init(void)
+int __init tls_device_init(void)
 {
-	register_netdevice_notifier(&tls_dev_notifier);
+	return register_netdevice_notifier(&tls_dev_notifier);
 }
 
 void __exit tls_device_cleanup(void)
diff --git a/net/tls/tls_main.c b/net/tls/tls_main.c
index 58d22d6b86ae..e537085b184f 100644
--- a/net/tls/tls_main.c
+++ b/net/tls/tls_main.c
@@ -905,7 +905,12 @@ static int __init tls_register(void)
 	if (err)
 		return err;
 
-	tls_device_init();
+	err = tls_device_init();
+	if (err) {
+		unregister_pernet_subsys(&tls_proc_ops);
+		return err;
+	}
+
 	tcp_register_ulp(&tcp_tls_ulp_ops);
 
 	return 0;
-- 
2.35.1