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authorWenchao Hao2023-02-25 18:01:36 +0800
committerMartin K. Petersen2023-03-07 21:02:09 -0500
commitd3c57724f1569311e4b81e98fad0931028b9bdcd (patch)
tree3ead6c2142e79c2ddd58b1627d3b6f5289d511a2 /drivers/scsi
parent288b3271d920c9ba949c3bab0f749f4cecc70e09 (diff)
scsi: mpt3sas: Fix NULL pointer access in mpt3sas_transport_port_add()
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>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/mpt3sas/mpt3sas_transport.c14
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/scsi/mpt3sas/mpt3sas_transport.c b/drivers/scsi/mpt3sas/mpt3sas_transport.c
index e5ecd6ada6cd..e8a4750f6ec4 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_transport.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_transport.c
@@ -785,7 +785,7 @@ 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;
@@ -824,6 +824,12 @@ mpt3sas_transport_port_add(struct MPT3SAS_ADAPTER *ioc, u16 handle,
mpt3sas_port->remote_identify.sas_address;
}
+ 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 ((sas_rphy_add(rphy))) {
@@ -831,6 +837,7 @@ 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) {
@@ -857,7 +864,10 @@ mpt3sas_transport_port_add(struct MPT3SAS_ADAPTER *ioc, u16 handle,
rphy_to_expander_device(rphy), hba_port->port_id);
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);