From bc68e428d4963af0201e92159629ab96948f0893 Mon Sep 17 00:00:00 2001
From: Yang Yingliang <yangyingliang@huawei.com>
Date: Tue, 15 Nov 2022 09:50:42 +0800
Subject: [PATCH] scsi: target: tcm_loop: Fix possible name leak in
tcm_loop_setup_hba_bus()
If device_register() fails in tcm_loop_setup_hba_bus(), the name allocated
by dev_set_name() need be freed. As comment of device_register() says, it
should use put_device() to give up the reference in the error path. So fix
this by calling put_device(), then the name can be freed in kobject_cleanup().
The 'tl_hba' will be freed in tcm_loop_release_adapter(), so it don't need
goto error label in this case.
Fixes: 3703b2c5d041 ("[SCSI] tcm_loop: Add multi-fabric Linux/SCSI LLD fabric module")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20221115015042.3652261-1-yangyingliang@huawei.com
Reviewed-by: Mike Christie <michael.chritie@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
drivers/target/loopback/tcm_loop.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/target/loopback/tcm_loop.c b/drivers/target/loopback/tcm_loop.c
index 4407b56aa6d1..139031ccb700 100644
--- a/drivers/target/loopback/tcm_loop.c
+++ b/drivers/target/loopback/tcm_loop.c
@@ -397,6 +397,7 @@ static int tcm_loop_setup_hba_bus(struct tcm_loop_hba *tl_hba, int tcm_loop_host
ret = device_register(&tl_hba->dev);
if (ret) {
pr_err("device_register() failed for tl_hba->dev: %d\n", ret);
+ put_device(&tl_hba->dev);
return -ENODEV;
}
@@ -1073,7 +1074,7 @@ check_len:
*/
ret = tcm_loop_setup_hba_bus(tl_hba, tcm_loop_hba_no_cnt);
if (ret)
- goto out;
+ return ERR_PTR(ret);
sh = tl_hba->sh;
tcm_loop_hba_no_cnt++;