obexd: Fix not checking for valid fd on NewConnection

The fd needs to be checked as it may not be valid which cause the
following warnings:

==8162== Warning: invalid file descriptor 1031 in syscall fcntl(DUPFD_CLOEXEC)()

(obexd:8162): GLib-WARNING **: giounix.c:412Error while getting flags for FD: Bad file descriptor (9)

1 files changed, 13 insertions, 0 deletions

diff --git a/obexd/plugins/bluetooth.c b/obexd/plugins/bluetooth.c
index 07baf9058..e4d518ef5 100644
--- a/obexd/plugins/bluetooth.c
+++ b/obexd/plugins/bluetooth.c
@@ -30,6 +30,7 @@
 #include <string.h>
 #include <unistd.h>
 #include <inttypes.h>
+#include <fcntl.h>
 #include <sys/socket.h>
 
 #include <glib.h>
@@ -132,6 +133,18 @@ static DBusMessage *profile_new_connection(DBusConnection *conn,
 
 	dbus_message_iter_get_basic(&args, &fd);
 
+	if (fd < 0) {
+		error("bluetooth: NewConnection invalid fd");
+		return invalid_args(msg);
+	}
+
+	/* Read fd flags to make sure it can be used */
+	if (fcntl(fd, F_GETFD) < 0) {
+		error("bluetooth: fcntl(%d, F_GETFD): %s (%d)", fd,
+						strerror(errno), errno);
+		return invalid_args(msg);
+	}
+
 	io = g_io_channel_unix_new(fd);
 	if (io == NULL)
 		return invalid_args(msg);