Fix memory leaks

I was doing some code reviews of the 4.54 release and found a few memory
leaks. These are mostly in error paths.

3 files changed, 19 insertions, 3 deletions

diff --git a/compat/dun.c b/compat/dun.c
index 7140bacd5..3d4dab4d5 100644
--- a/compat/dun.c
+++ b/compat/dun.c
@@ -86,6 +86,7 @@ static int for_each_port(int (*func)(struct rfcomm_dev_info *, unsigned long), u
 	}
 
 	close(sk);
+	free(dl);
 	return r;
 }
 
diff --git a/compat/dund.c b/compat/dund.c
index fc8ba3036..f9847ea83 100644
--- a/compat/dund.c
+++ b/compat/dund.c
@@ -568,21 +568,26 @@ int main(int argc, char *argv[])
 
 	io_init();
 
-	if (dun_init())
+	if (dun_init()) {
+		free(dst);
 		return -1;
+	}
 
 	/* Check non daemon modes first */
 	switch (mode) {
 	case SHOW:
 		do_show();
+		free(dst);
 		return 0;
 
 	case KILL:
 		do_kill(dst);
+		free(dst);
 		return 0;
 
 	case NONE:
 		printf(main_help, VERSION);
+		free(dst);
 		return 0;
 	}
 
@@ -612,6 +617,7 @@ int main(int argc, char *argv[])
 		src_dev = hci_devid(src);
 		if (src_dev < 0 || hci_devba(src_dev, &src_addr) < 0) {
 			syslog(LOG_ERR, "Invalid source. %s(%d)", strerror(errno), errno);
+			free(dst);
 			return -1;
 		}
 	}
@@ -634,5 +640,6 @@ int main(int argc, char *argv[])
 		break;
 	}
 
+	free(dst);
 	return 0;
 }
diff --git a/compat/pand.c b/compat/pand.c
index c3f39333a..53f6c41d6 100644
--- a/compat/pand.c
+++ b/compat/pand.c
@@ -721,21 +721,26 @@ int main(int argc, char *argv[])
 	argv += optind;
 	optind = 0;
 
-	if (bnep_init())
+	if (bnep_init()) {
+		free(dst);
 		return -1;
+	}
 
 	/* Check non daemon modes first */
 	switch (mode) {
 	case SHOW:
 		do_show();
+		free(dst);
 		return 0;
 
 	case KILL:
 		do_kill(dst);
+		free(dst);
 		return 0;
 
 	case NONE:
 		printf(main_help, VERSION);
+		free(dst);
 		return 0;
 	}
 
@@ -766,12 +771,15 @@ int main(int argc, char *argv[])
 		if (src_dev < 0 || hci_devba(src_dev, &src_addr) < 0) {
 			syslog(LOG_ERR, "Invalid source. %s(%d)",
 						strerror(errno), errno);
+			free(dst);
 			return -1;
 		}
 	}
 
-	if (pidfile && write_pidfile())
+	if (pidfile && write_pidfile()) {
+		free(dst);
 		return -1;
+	}
 
 	if (dst) {
 		/* Disable cache invalidation */