resource leak in librdmacm

[Honggang LI <honli@xxxxxxxxxx>]

Hi,

 We are observing resource leak issues with librdmacm. This memory leak
 issue is one of those issues.

 You need a working IPoIB interface to run this reproducer. This reproducer will
be killed as out of memory.

It had been compiled with "gcc -ldl -lrdmacm -g -o fd-leak.exe fd-leak.c"

Thanks

~]$ cat fd-leak.c 
#include <stdio.h>
#include <stdlib.h>
#include <dlfcn.h>
#include <arpa/inet.h>
#include <rdma/rdma_cma.h>
#include <limits.h>

#include <sys/types.h>
#include <unistd.h>

void test(char *ipoib_ip)
{
	int ret;
	struct rdma_cm_id *id;
	struct sockaddr_in ipoib_addr;
	struct rdma_event_channel *ch;

	memset(&ipoib_addr, 0, sizeof(ipoib_addr));

	ipoib_addr.sin_family = AF_INET;
	ipoib_addr.sin_port = 5555;

#if 0
	ret = inet_pton(AF_INET, ipoib_ip, (void *)&(ipoib_addr.sin_addr));

	if (ret != 1)
		printf("inet_pton failed\n");
#else	
	ipoib_addr.sin_addr.s_addr=htonl(INADDR_ANY);
#endif	

	ch = rdma_create_event_channel();
	if (ch == NULL)
		printf("rdma_create_event_channel failed\n");

	ret = rdma_create_id(ch, &id, NULL, RDMA_PS_TCP);
	if (ret != 0)
		printf("rdma_create_id failed\n");

	ret = rdma_bind_addr(id, (struct sockaddr *) &ipoib_addr);

	if (ret != 0)
		printf("rdma_bind_addr failed\n");

	rdma_destroy_event_channel(ch);

	rdma_destroy_id(id);
}

int main(int argc, char** argv)
{
	int i;
	void *handle;
	pid_t pid;
	char path[128];
	int ret;

#if 0
	if (argc != 2) {
		printf("usage: %s IPoIB_IP_ADDR\n", argv[0]);
		exit(-1);
	}
#endif

#define MAX INT_MAX
	for (i = 0; i < MAX; i++) {
		if (i % 1000 == 0)
			printf("dlopen/dlclose test: round %d\n", i);
		handle = dlopen("/usr/lib64/librdmacm.so", RTLD_NOW);
		if (!handle) {
			printf("dlopen failed\n");
		}

		test(argv[1]);
#if 1
		ret = dlclose(handle);
		if (ret != 0)
			printf("dlclose failed\n");
#endif		
	}

#if 0
	pid = getpid();
	printf("pid = %d\n", pid);

//	for(;;);
#endif
	return 0;
}