diff options
| author | Lin Ma <linma@zju.edu.cn> | 2021-10-07 19:44:30 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-10-27 09:32:40 +0200 |
| commit | 1d5e0107bfdbef6cc140fb5d7a1a817a40948528 (patch) | |
| tree | 96829b3df3518b2ff6537f316382f712b0f71639 | |
| parent | a4f281ffc1d128d7ea693cbc3a796e56e919fd7c (diff) | |
nfc: nci: fix the UAF of rf_conn_info object
commit 1b1499a817c90fd1ce9453a2c98d2a01cca0e775 upstream.
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@canonical.com>
Signed-off-by: Lin Ma <linma@zju.edu.cn>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/nfc/nci/rsp.c | 2 |
1 files changed, 2 insertions, 0 deletions
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); } } |