3.5.7.3 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Chris Boot <bo...@bootc.net>
commit e1fe2060d7e8f58a69374135e32e90f0bb79a7fd upstream.
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.c...@asianux.com>
Signed-off-by: Chris Boot <bo...@bootc.net>
Cc: Andy Grover <agro...@redhat.com>
Cc: Nicholas A. Bellinger <n...@linux-iscsi.org>
Signed-off-by: Nicholas Bellinger <n...@linux-iscsi.org>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesin...@canonical.com>
---
drivers/target/sbp/sbp_target.c | 17 ++++++++++-------
1 file changed, 10 insertions(+), 7 deletions(-)
diff --git a/drivers/target/sbp/sbp_target.c b/drivers/target/sbp/sbp_target.c
index 7e6136e..e935aaa 100644
--- a/drivers/target/sbp/sbp_target.c
+++ b/drivers/target/sbp/sbp_target.c
@@ -2221,20 +2221,23 @@ static struct se_portal_group *sbp_make_tpg(
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)
--
1.7.9.5
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