sbp-target: fix error path in sbp_make_tpg()
If the TPG memory is allocated successfully, but we fail further along
in the function, a dangling pointer to freed memory is left in the TPort
structure. This is mostly harmless, but does prevent re-trying the
operation without first removing the TPort altogether.
Reported-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Chris Boot <bootc@bootc.net>
Cc: Andy Grover <agrover@redhat.com>
Cc: Nicholas A. Bellinger <nab@linux-iscsi.org>
Cc: stable@vger.kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
diff --git a/drivers/target/sbp/sbp_target.c b/drivers/target/sbp/sbp_target.c
index f0a2a1d..2e8d06f 100644
--- a/drivers/target/sbp/sbp_target.c
+++ b/drivers/target/sbp/sbp_target.c
@@ -2208,20 +2208,23 @@
tport->mgt_agt = sbp_management_agent_register(tport);
if (IS_ERR(tport->mgt_agt)) {
ret = PTR_ERR(tport->mgt_agt);
- kfree(tpg);
- return ERR_PTR(ret);
+ goto out_free_tpg;
}
ret = core_tpg_register(&sbp_fabric_configfs->tf_ops, wwn,
&tpg->se_tpg, (void *)tpg,
TRANSPORT_TPG_TYPE_NORMAL);
- if (ret < 0) {
- sbp_management_agent_unregister(tport->mgt_agt);
- kfree(tpg);
- return ERR_PTR(ret);
- }
+ if (ret < 0)
+ goto out_unreg_mgt_agt;
return &tpg->se_tpg;
+
+out_unreg_mgt_agt:
+ sbp_management_agent_unregister(tport->mgt_agt);
+out_free_tpg:
+ tport->tpg = NULL;
+ kfree(tpg);
+ return ERR_PTR(ret);
}
static void sbp_drop_tpg(struct se_portal_group *se_tpg)