bus/vdev: verify strdup return

[ upstream commit 83f275fa8124daf3a6b3e56f4b40a2be4b07a3b4 ]

Add verify strdup return value logic.

Fixes: 64051bb ("devargs: unify scratch buffer storage")

Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
Acked-by: Huisong Li <lihuisong@huawei.com>

drivers/bus/vdev/vdev.c

@@ -249,6 +249,10 @@ alloc_devargs(const char *name, const char *args)
 		devargs->data = strdup(args);
 	else
 		devargs->data = strdup("");
+	if (devargs->data == NULL) {
+		free(devargs);
+		return NULL;
+	}
 	devargs->args = devargs->data;
 
 	ret = strlcpy(devargs->name, name, sizeof(devargs->name));