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scsi: mpt3sas: Fix NULL pointer access in mpt3sas_transport_port_add()

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[ Upstream commit d3c57724f1569311e4b81e98fad0931028b9bdcd ]

Port is allocated by sas_port_alloc_num() and rphy is allocated by either
sas_end_device_alloc() or sas_expander_alloc(), all of which may return
NULL. So we need to check the rphy to avoid possible NULL pointer access.

If sas_rphy_add() returned with failure, rphy is set to NULL. We would
access the rphy in the following lines which would also result NULL pointer
access.

Fixes: 78316e9dfc24 ("scsi: mpt3sas: Fix possible resource leaks in mpt3sas_transport_port_add()")
Signed-off-by: Wenchao Hao <haowenchao2@huawei.com>
Link: https://lore.kernel.org/r/20230225100135.2109330-1-haowenchao2@huawei.com
Acked-by: Sathya Prakash Veerichetty <sathya.prakash@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Wenchao Hao
2023-02-25 18:01:36 +08:00
committed by Greg Kroah-Hartman
parent 79fe786dab
commit 6f0c2f70d9
1 changed files with 12 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/scsi/mpt3sas/mpt3sas_transport.c
View File

@@ -670,7 +670,7 @@ mpt3sas_transport_port_add(struct MPT3SAS_ADAPTER *ioc, u16 handle,
goto out_fail;
}
port = sas_port_alloc_num(sas_node->parent_dev);
if ((sas_port_add(port))) {
if (!port || (sas_port_add(port))) {
ioc_err(ioc, "failure at %s:%d/%s()!\n",
__FILE__, __LINE__, __func__);
goto out_fail;
@@ -695,6 +695,12 @@ mpt3sas_transport_port_add(struct MPT3SAS_ADAPTER *ioc, u16 handle,
rphy = sas_expander_alloc(port,
mpt3sas_port->remote_identify.device_type);
if (!rphy) {
ioc_err(ioc, "failure at %s:%d/%s()!\n",
__FILE__, __LINE__, __func__);
goto out_delete_port;
}
rphy->identify = mpt3sas_port->remote_identify;
if (mpt3sas_port->remote_identify.device_type == SAS_END_DEVICE) {
@@ -714,6 +720,7 @@ mpt3sas_transport_port_add(struct MPT3SAS_ADAPTER *ioc, u16 handle,
__FILE__, __LINE__, __func__);
sas_rphy_free(rphy);
rphy = NULL;
goto out_delete_port;
}
if (mpt3sas_port->remote_identify.device_type == SAS_END_DEVICE) {
@@ -740,7 +747,10 @@ mpt3sas_transport_port_add(struct MPT3SAS_ADAPTER *ioc, u16 handle,
rphy_to_expander_device(rphy));
return mpt3sas_port;
out_fail:
out_delete_port:
sas_port_delete(port);
out_fail:
list_for_each_entry_safe(mpt3sas_phy, next, &mpt3sas_port->phy_list,
port_siblings)
list_del(&mpt3sas_phy->port_siblings);