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authorAlex Elder <elder@inktank.com>2012-05-16 15:16:39 -0500
committerAlex Elder <elder@dreamhost.com>2012-05-17 08:18:13 -0500
commita255651d4cad89f1a606edd36135af892ada4f20 (patch)
tree6d2c694b336f948272349e5de24be70460a94826 /fs/ceph/mds_client.c
parent74f1869f76d043bad12ec03b4d5f04a8c3d1f157 (diff)
ceph: ensure auth ops are defined before use
In the create_authorizer method for both the mds and osd clients, the auth_client->ops pointer is blindly dereferenced. There is no obvious guarantee that this pointer has been assigned. And furthermore, even if the ops pointer is non-null there is definitely no guarantee that the create_authorizer or destroy_authorizer methods are defined. Add checks in both routines to make sure they are defined (non-null) before use. Add similar checks in a few other spots in these files while we're at it. Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-by: Sage Weil <sage@inktank.com>
Diffstat (limited to 'fs/ceph/mds_client.c')
-rw-r--r--fs/ceph/mds_client.c14
1 files changed, 6 insertions, 8 deletions
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index b71ffd2c809..462281742ae 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -3406,16 +3406,14 @@ static int get_authorizer(struct ceph_connection *con,
int ret = 0;
if (force_new && auth->authorizer) {
- ac->ops->destroy_authorizer(ac, auth->authorizer);
+ if (ac->ops && ac->ops->destroy_authorizer)
+ ac->ops->destroy_authorizer(ac, auth->authorizer);
auth->authorizer = NULL;
}
- if (auth->authorizer == NULL) {
- if (ac->ops->create_authorizer) {
- ret = ac->ops->create_authorizer(ac,
- CEPH_ENTITY_TYPE_MDS, auth);
- if (ret)
- return ret;
- }
+ if (!auth->authorizer && ac->ops && ac->ops->create_authorizer) {
+ ret = ac->ops->create_authorizer(ac, CEPH_ENTITY_TYPE_MDS, auth);
+ if (ret)
+ return ret;
}
*proto = ac->protocol;