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rbd: fix double free on rbd_dev->header_name

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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: Ilya Dryomov <[email protected]>
Reviewed-by: Alex Elder <[email protected]>
This commit is contained in:
Ilya Dryomov 2015-08-31 15:21:39 +03:00
commit 3ebe138ac6
1 changed files with 0 additions and 1 deletions
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1
drivers/block/rbd.c
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@ -5201,7 +5201,6 @@ 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);