From a6ad2a6b9cc1d9d791aee5462cfb8528f366f1d4 Mon Sep 17 00:00:00 2001 From: Johan Hedberg Date: Mon, 19 Oct 2015 10:51:47 +0300 Subject: [PATCH] Bluetooth: Fix removing connection parameters when unpairing The commit 89cbb0638e9b7 introduced support for deferred connection parameter removal when unpairing by removing them only once an existing connection gets disconnected. However, it failed to address the scenario when we're *not* connected and do an unpair operation. What makes things worse is that most user space BlueZ versions will first issue a disconnect request and only then unpair, meaning the buggy code will be triggered every time. This effectively causes the kernel to resume scanning and reconnect to a device for which we've removed all keys and GATT database information. This patch fixes the issue by adding the missing call to the hci_conn_params_del() function to a branch which handles the case of no existing connection. Signed-off-by: Johan Hedberg Signed-off-by: Marcel Holtmann Cc: stable@vger.kernel.org # 3.19+ --- net/bluetooth/mgmt.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c index 33a8564397b4..98d8d20a05c1 100644 --- a/net/bluetooth/mgmt.c +++ b/net/bluetooth/mgmt.c @@ -3090,6 +3090,11 @@ static int unpair_device(struct sock *sk, struct hci_dev *hdev, void *data, } else { u8 addr_type; + if (cp->addr.type == BDADDR_LE_PUBLIC) + addr_type = ADDR_LE_DEV_PUBLIC; + else + addr_type = ADDR_LE_DEV_RANDOM; + conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, &cp->addr.bdaddr); if (conn) { @@ -3105,13 +3110,10 @@ static int unpair_device(struct sock *sk, struct hci_dev *hdev, void *data, */ if (!cp->disconnect) conn = NULL; + } else { + hci_conn_params_del(hdev, &cp->addr.bdaddr, addr_type); } - if (cp->addr.type == BDADDR_LE_PUBLIC) - addr_type = ADDR_LE_DEV_PUBLIC; - else - addr_type = ADDR_LE_DEV_RANDOM; - hci_remove_irk(hdev, &cp->addr.bdaddr, addr_type); err = hci_remove_ltk(hdev, &cp->addr.bdaddr, addr_type); -- 2.20.1