[PATCH 6.1 0646/1146] scsi: hpsa: Fix error handling in hpsa_add_sas_host()

Greg Kroah-Hartman
2022-12-28T16:21:21Z

From: Yang Yingliang <yangyingliang@huawei.com>

[ Upstream commit 4ef174a3ad9b5d73c1b6573e244ebba2b0d86eac ]

hpsa_sas_port_add_phy() does:
...
sas_phy_add() -> may return error here
sas_port_add_phy()
...

Whereas hpsa_free_sas_phy() does:
...
sas_port_delete_phy()
sas_phy_delete()
...

If hpsa_sas_port_add_phy() returns an error, hpsa_free_sas_phy() can not be
called to free the memory because the port and the phy have not been added
yet.

Replace hpsa_free_sas_phy() with sas_phy_free() and kfree() to avoid kernel
crash in this case.

Fixes: d04e62b9d63a ("hpsa: add in sas transport class")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20221110151129.394389-1-yangyingliang@huawei.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/scsi/hpsa.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index e5cbc97a5ea4..6696967c5192 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -9786,7 +9786,8 @@ static int hpsa_add_sas_host(struct ctlr_info *h)
return 0;

free_sas_phy:
- hpsa_free_sas_phy(hpsa_sas_phy);
+ sas_phy_free(hpsa_sas_phy->phy);
+ kfree(hpsa_sas_phy);
free_sas_port:
hpsa_free_sas_port(hpsa_sas_port);
free_sas_node:
--
2.35.1