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authorAlex Elder <elder@inktank.com>2013-05-16 15:04:20 -0500
committerAlex Elder <elder@inktank.com>2013-05-17 12:50:03 -0500
commit7262cfca430a1a0e0707149af29ae86bc0ded230 (patch)
tree30b8e36ffebad551fd4e4392ca9f49fd22d2298c /drivers/block
parent39be95e9c8c0b5668c9f8806ffe29bf9f4bc0f40 (diff)
rbd: don't destroy ceph_opts in rbd_add()
Whether rbd_client_create() successfully creates a new client or not, it takes responsibility for getting the ceph_opts structure it's passed destroyed. If successful, the structure becomes associated with the created client; if not, rbd_client_create() will destroy it. Previously, rbd_get_client() would call ceph_destroy_options() if rbd_get_client() failed, and that meant it got called twice. That led freeing various pointers more than once, which is never a good idea. This resolves: http://tracker.ceph.com/issues/4559 Cc: stable@vger.kernel.org # 3.8+ Reported-by: Dan van der Ster <dan@vanderster.com> Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
Diffstat (limited to 'drivers/block')
-rw-r--r--drivers/block/rbd.c10
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 6b872f21977..5f64ba77bc7 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -521,8 +521,8 @@ static const struct block_device_operations rbd_bd_ops = {
};
/*
- * Initialize an rbd client instance.
- * We own *ceph_opts.
+ * Initialize an rbd client instance. Success or not, this function
+ * consumes ceph_opts.
*/
static struct rbd_client *rbd_client_create(struct ceph_options *ceph_opts)
{
@@ -677,7 +677,8 @@ static int parse_rbd_opts_token(char *c, void *private)
/*
* Get a ceph client with specific addr and configuration, if one does
- * not exist create it.
+ * not exist create it. Either way, ceph_opts is consumed by this
+ * function.
*/
static struct rbd_client *rbd_get_client(struct ceph_options *ceph_opts)
{
@@ -4994,7 +4995,6 @@ static ssize_t rbd_add(struct bus_type *bus,
rc = PTR_ERR(rbdc);
goto err_out_args;
}
- ceph_opts = NULL; /* rbd_dev client now owns this */
/* pick the pool */
osdc = &rbdc->client->osdc;
@@ -5038,8 +5038,6 @@ err_out_rbd_dev:
err_out_client:
rbd_put_client(rbdc);
err_out_args:
- if (ceph_opts)
- ceph_destroy_options(ceph_opts);
kfree(rbd_opts);
rbd_spec_put(spec);
err_out_module: