From: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> 3.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Alex Elder <elder@xxxxxxxxxxx> commit 7262cfca430a1a0e0707149af29ae86bc0ded230 upstream. 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 Reported-by: Dan van der Ster <dan@xxxxxxxxxxxxxx> Signed-off-by: Alex Elder <elder@xxxxxxxxxxx> Reviewed-by: Josh Durgin <josh.durgin@xxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/block/rbd.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -435,8 +435,8 @@ static const struct block_device_operati }; /* - * 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) { @@ -583,7 +583,8 @@ static int parse_rbd_opts_token(char *c, /* * 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) { @@ -4104,7 +4105,6 @@ static ssize_t rbd_add(struct bus_type * rc = PTR_ERR(rbdc); goto err_out_args; } - ceph_opts = NULL; /* rbd_dev client now owns this */ /* pick the pool */ osdc = &rbdc->client->osdc; @@ -4140,8 +4140,6 @@ 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: -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html