6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: wenglianfa <wenglianfa@xxxxxxxxxx>
[ Upstream commit fd8489294dd2beefb70f12ec4f6132aeec61a4d0 ]
Currently rsv_qp is freed before ib_unregister_device() is called
on HIP08. During the time interval, users can still dereg MR and
rsv_qp will be used in this process, leading to a UAF. Move the
release of rsv_qp after calling ib_unregister_device() to fix it.
Fixes: 70f92521584f ("RDMA/hns: Use the reserved loopback QPs to free MR before destroying MPT")
Signed-off-by: wenglianfa <wenglianfa@xxxxxxxxxx>
Signed-off-by: Junxian Huang <huangjunxian6@xxxxxxxxxxxxx>
Link: https://patch.msgid.link/20240906093444.3571619-3-huangjunxian6@xxxxxxxxxxxxx
Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
index 8f93aacde4936..908b4372bac95 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -2932,6 +2932,9 @@ static int hns_roce_v2_init(struct hns_roce_dev *hr_dev)
static void hns_roce_v2_exit(struct hns_roce_dev *hr_dev)
{
+ if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08)
+ free_mr_exit(hr_dev);
+
hns_roce_function_clear(hr_dev);
if (!hr_dev->is_vf)
@@ -6779,9 +6782,6 @@ static void __hns_roce_hw_v2_uninit_instance(struct hnae3_handle *handle,
hr_dev->state = HNS_ROCE_DEVICE_STATE_UNINIT;
hns_roce_handle_device_err(hr_dev);
- if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08)
- free_mr_exit(hr_dev);
-
hns_roce_exit(hr_dev);
kfree(hr_dev->priv);
ib_dealloc_device(&hr_dev->ib_dev);
--
2.43.0
