storage: avoid segfault

When the "lxc.rootfs.path" property is not set and users request a container copy we would segfault since strstr() would be called on a NULL pointer. Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

storage: avoid segfault
45b4bb96 · Christian Brauner · 76bdf299 · 45b4bb96
Unverified Commit 45b4bb96 authored Sep 11, 2017 by Christian Brauner
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storage.c src/lxc/storage/storage.c +5 -0

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--- a/src/lxc/storage/storage.c
+++ b/src/lxc/storage/storage.c
@@ -337,6 +337,11 @@ struct lxc_storage *storage_copy(struct lxc_container *c, const char *cname,
 	struct rsync_data data = {0};
 	char cmd_output[MAXPATHLEN] = {0};

+	if (!src) {
+		ERROR("No rootfs specified");
+		return NULL;
+	}
+
 	/* If the container name doesn't show up in the rootfs path, then we
 	 * don't know how to come up with a new name.
 	 */