diff --git a/fs/smb/server/transport_ipc.c b/fs/smb/server/transport_ipc.c
index 2584b162415b..4b0b572a3e1b 100644
--- a/fs/smb/server/transport_ipc.c
+++ b/fs/smb/server/transport_ipc.c
@@ -679,7 +679,7 @@ ksmbd_ipc_spnego_authen_request(const char *spnego_blob, int blob_len)
 		return NULL;
 
 	msg = ipc_msg_alloc(sizeof(struct ksmbd_spnego_authen_request) +
-			blob_len + 1);
+			blob_len);
 	if (!msg)
 		return NULL;
 
@@ -860,7 +860,7 @@ struct ksmbd_rpc_command *ksmbd_rpc_write(struct ksmbd_session *sess, int handle
 	if (payload_sz > KSMBD_IPC_MAX_PAYLOAD)
 		return NULL;
 
-	msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command) + payload_sz + 1);
+	msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command) + payload_sz);
 	if (!msg)
 		return NULL;
 
@@ -919,7 +919,7 @@ struct ksmbd_rpc_command *ksmbd_rpc_ioctl(struct ksmbd_session *sess, int handle
 	if (payload_sz > KSMBD_IPC_MAX_PAYLOAD)
 		return NULL;
 
-	msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command) + payload_sz + 1);
+	msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command) + payload_sz);
 	if (!msg)
 		return NULL;