From f117b8e8611ee494765e5466799a216f842d7527 Mon Sep 17 00:00:00 2001 From: Wenchao Hao Date: Sat, 25 Feb 2023 18:01:36 +0800 Subject: [PATCH] scsi: mpt3sas: Fix NULL pointer access in mpt3sas_transport_port_add() [ Upstream commit 8b1e9ceb2baacac1f9c26ddebb9963172eddb94d ] 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: 3ba756e7a02d ("scsi: mpt3sas: Fix possible resource leaks in mpt3sas_transport_port_add()") Signed-off-by: Wenchao Hao Link: https://lore.kernel.org/r/20230225100135.2109330-1-haowenchao2@huawei.com Acked-by: Sathya Prakash Veerichetty Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- 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 e5ecd6ada6cdd..e8a4750f6ec47 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); -- 2.39.5