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| author | Alex Elder <elder@inktank.com> | 2012-05-16 22:16:39 +0200 |
|---|---|---|
| committer | Alex Elder <elder@dreamhost.com> | 2012-05-17 15:18:13 +0200 |
| commit | a255651d4cad89f1a606edd36135af892ada4f20 (patch) | |
| tree | 6d2c694b336f948272349e5de24be70460a94826 /net/ceph | |
| parent | ceph: messenger: reduce args to create_authorizer (diff) | |
| download | linux-a255651d4cad89f1a606edd36135af892ada4f20.tar.xz linux-a255651d4cad89f1a606edd36135af892ada4f20.zip | |
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 'net/ceph')
| -rw-r--r-- | net/ceph/osd_client.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c index 2da4b9e97dc1..f640bdf027e7 100644 --- a/net/ceph/osd_client.c +++ b/net/ceph/osd_client.c @@ -664,10 +664,10 @@ static void put_osd(struct ceph_osd *osd) { dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref), atomic_read(&osd->o_ref) - 1); - if (atomic_dec_and_test(&osd->o_ref)) { + if (atomic_dec_and_test(&osd->o_ref) && osd->o_auth.authorizer) { struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth; - if (osd->o_auth.authorizer) + if (ac->ops && ac->ops->destroy_authorizer) ac->ops->destroy_authorizer(ac, osd->o_auth.authorizer); kfree(osd); } @@ -2119,10 +2119,11 @@ 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 (!auth->authorizer && ac->ops && ac->ops->create_authorizer) { ret = ac->ops->create_authorizer(ac, CEPH_ENTITY_TYPE_OSD, auth); if (ret) return ret; @@ -2144,6 +2145,10 @@ static int verify_authorizer_reply(struct ceph_connection *con, int len) struct ceph_osd_client *osdc = o->o_osdc; struct ceph_auth_client *ac = osdc->client->monc.auth; + /* + * XXX If ac->ops or ac->ops->verify_authorizer_reply is null, + * XXX which do we do: succeed or fail? + */ return ac->ops->verify_authorizer_reply(ac, o->o_auth.authorizer, len); } @@ -2153,7 +2158,7 @@ static int invalidate_authorizer(struct ceph_connection *con) struct ceph_osd_client *osdc = o->o_osdc; struct ceph_auth_client *ac = osdc->client->monc.auth; - if (ac->ops->invalidate_authorizer) + if (ac->ops && ac->ops->invalidate_authorizer) ac->ops->invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); return ceph_monc_validate_auth(&osdc->client->monc); |