From: Wenchao Hao haowenchao2@huawei.com
[ 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 --- drivers/scsi/mpt3sas/mpt3sas_transport.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/mpt3sas/mpt3sas_transport.c b/drivers/scsi/mpt3sas/mpt3sas_transport.c index b909cf100ea48..ebe78ec42da8b 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_transport.c +++ b/drivers/scsi/mpt3sas/mpt3sas_transport.c @@ -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) { @@ -741,7 +748,10 @@ 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);