From: Lin Ma <linma@xxxxxxxxxx>
[ Upstream commit 1b1499a817c90fd1ce9453a2c98d2a01cca0e775 ]
The nci_core_conn_close_rsp_packet() function will release the conn_info
with given conn_id. However, it needs to set the rf_conn_info to NULL to
prevent other routines like nci_rf_intf_activated_ntf_packet() to trigger
the UAF.
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxx>
Signed-off-by: Lin Ma <linma@xxxxxxxxxx>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
net/nfc/nci/rsp.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/net/nfc/nci/rsp.c b/net/nfc/nci/rsp.c
index 9b6eb913d801..74e4d5e8c275 100644
--- a/net/nfc/nci/rsp.c
+++ b/net/nfc/nci/rsp.c
@@ -274,6 +274,8 @@ static void nci_core_conn_close_rsp_packet(struct nci_dev *ndev,
conn_info = nci_get_conn_info_by_conn_id(ndev, ndev->cur_id);
if (conn_info) {
list_del(&conn_info->list);
+ if (conn_info == ndev->rf_conn_info)
+ ndev->rf_conn_info = NULL;
devm_kfree(&ndev->nfc_dev->dev, conn_info);
}
}
--
2.33.0
