Commit d7fdc82a authored by Ilya Dryomov's avatar Ilya Dryomov Committed by Luis Henriques

rbd: fix double free on rbd_dev->header_name

commit 3ebe138a upstream.

If rbd_dev_image_probe() in rbd_dev_probe_parent() fails, header_name
is freed twice: once in rbd_dev_probe_parent() and then in its caller
rbd_dev_image_probe() (rbd_dev_image_probe() is called recursively to
handle parent images).

rbd_dev_probe_parent() is responsible for probing the parent, so it
shouldn't muck with clone's fields.
Signed-off-by: default avatarIlya Dryomov <idryomov@gmail.com>
Reviewed-by: default avatarAlex Elder <elder@linaro.org>
Signed-off-by: default avatarLuis Henriques <luis.henriques@canonical.com>
parent cd5bdc69
......@@ -5058,7 +5058,6 @@ static int rbd_dev_probe_parent(struct rbd_device *rbd_dev)
out_err:
if (parent) {
rbd_dev_unparent(rbd_dev);
kfree(rbd_dev->header_name);
rbd_dev_destroy(parent);
} else {
rbd_put_client(rbdc);
......
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