tools/iio: Add memory allocation failure check for trigger_name

Added a check to handle memory allocation failure for `trigger_name`
and return `-ENOMEM`.

Signed-off-by: Zhu Jun <zhujun2@cmss.chinamobile.com>
Link: https://patch.msgid.link/20240828093129.3040-1-zhujun2@cmss.chinamobile.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Author: Zhu Jun

tools/iio/iio_generic_buffer.c

@@ -498,6 +498,10 @@ int main(int argc, char **argv)
 			return -ENOMEM;
 		}
 		trigger_name = malloc(IIO_MAX_NAME_LENGTH);
+		if (!trigger_name) {
+			ret = -ENOMEM;
+			goto error;
+		}
 		ret = read_sysfs_string("name", trig_dev_name, trigger_name);
 		free(trig_dev_name);
 		if (ret < 0) {