[LTP] [PATCH] rpc01: fix variable not initialized

[Hongchen Zhang]

when error occurred in function callrpc/clnt_call, return_buffer may
be leaved not initialized.So initialize return_buffer to NULL,and
retrieve the return_buffer->data when return_buffer is really assigned.

Signed-off-by: Hongchen Zhang <zhanghongchen@loongson.cn>
---
 testcases/network/rpc/basic_tests/rpc01/rpc1.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/testcases/network/rpc/basic_tests/rpc01/rpc1.c b/testcases/network/rpc/basic_tests/rpc01/rpc1.c
index bc9f35b..5691c06 100644
--- a/testcases/network/rpc/basic_tests/rpc01/rpc1.c
+++ b/testcases/network/rpc/basic_tests/rpc01/rpc1.c
@@ -24,7 +24,7 @@ void usage_error(char *program_name);
 int main(int argc, char *argv[])
 {
 	struct hostent *hp;
-	struct data buffer, *return_buffer;
+	struct data buffer, *return_buffer = NULL;
 	int i, n, rc;
 	FILE *fp;
 	struct stat stat_buffer;
@@ -128,7 +128,8 @@ int main(int argc, char *argv[])
 	rc = callrpc(server, program, version, 1, (xdrproc_t)xdr_send_data,
 			(char *)&buffer, (xdrproc_t)xdr_receive_data,
 			(char *)&return_buffer);
-	do_compare(rc, "callrpc", &buffer, return_buffer->data);
+	do_compare(rc, "callrpc", &buffer,
+				return_buffer ? return_buffer->data : NULL);
 
 	server_sin.sin_port = 0;
 	sock = RPC_ANYSOCK;
@@ -145,7 +146,8 @@ int main(int argc, char *argv[])
 				(char *)&buffer, (xdrproc_t)xdr_receive_data,
 				(char *)&return_buffer, timeout);
 	clnt_destroy(clnt);
-	do_compare(rc, "udp transport", &buffer, return_buffer->data);
+	do_compare(rc, "udp transport", &buffer,
+				return_buffer ? return_buffer->data : NULL);
 
 	server_sin.sin_port = 0;
 	sock = RPC_ANYSOCK;
@@ -160,7 +162,8 @@ int main(int argc, char *argv[])
 				(char *)&buffer, (xdrproc_t)xdr_receive_data,
 				(char *)&return_buffer, timeout);
 	clnt_destroy(clnt);
-	do_compare(rc, "tcp transport", &buffer, return_buffer->data);
+	do_compare(rc, "tcp transport", &buffer,
+				return_buffer ? return_buffer->data : NULL);
 
 	exit(0);
 }
-- 
1.8.3.1