unimore/kernel-hacking-2024-linux-steffo
unimore/kernel-hacking-2024-linux-steffo
1
Fork 0
Code Pull requests 5 Wiki Activity

Bluetooth: MGMT: Ignore keys being loaded with invalid type

Browse source 
Due to 59b047bc98 there could be keys stored
with the wrong address type so this attempt to detect it and ignore them
instead of just failing to load all keys.

Cc: stable@vger.kernel.org
Link: https://github.com/bluez/bluez/issues/875
Fixes: 59b047bc98 ("Bluetooth: MGMT/SMP: Fix address type when using SMP over BREDR/LE")
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Luiz Augusto von Dentz 2024-08-27 15:01:34 -04:00
parent 532f8bcd1c
commit 1e9683c9b6
1 changed files with 19 additions and 18 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

37
net/bluetooth/mgmt.c
View file

@ -2830,15 +2830,6 @@ static int load_link_keys(struct sock *sk, struct hci_dev *hdev, void *data,
bt_dev_dbg(hdev, "debug_keys %u key_count %u", cp->debug_keys,
key_count);
for (i = 0; i < key_count; i++) {
struct mgmt_link_key_info *key = &cp->keys[i];
if (key->addr.type != BDADDR_BREDR || key->type > 0x08)
return mgmt_cmd_status(sk, hdev->id,
MGMT_OP_LOAD_LINK_KEYS,
MGMT_STATUS_INVALID_PARAMS);
}
hci_dev_lock(hdev);
hci_link_keys_clear(hdev);
@ -2863,6 +2854,19 @@ static int load_link_keys(struct sock *sk, struct hci_dev *hdev, void *data,
continue;
}
if (key->addr.type != BDADDR_BREDR) {
bt_dev_warn(hdev,
"Invalid link address type %u for %pMR",
key->addr.type, &key->addr.bdaddr);
continue;
}
if (key->type > 0x08) {
bt_dev_warn(hdev, "Invalid link key type %u for %pMR",
key->type, &key->addr.bdaddr);
continue;
}
/* Always ignore debug keys and require a new pairing if
* the user wants to use them.
*/
@ -7163,15 +7167,6 @@ static int load_long_term_keys(struct sock *sk, struct hci_dev *hdev,
bt_dev_dbg(hdev, "key_count %u", key_count);
for (i = 0; i < key_count; i++) {
struct mgmt_ltk_info *key = &cp->keys[i];
if (!ltk_is_valid(key))
return mgmt_cmd_status(sk, hdev->id,
MGMT_OP_LOAD_LONG_TERM_KEYS,
MGMT_STATUS_INVALID_PARAMS);
}
hci_dev_lock(hdev);
hci_smp_ltks_clear(hdev);
@ -7188,6 +7183,12 @@ static int load_long_term_keys(struct sock *sk, struct hci_dev *hdev,
continue;
}
if (!ltk_is_valid(key)) {
bt_dev_warn(hdev, "Invalid LTK for %pMR",
&key->addr.bdaddr);
continue;
}
switch (key->type) {
case MGMT_LTK_UNAUTHENTICATED:
authenticated = 0x00;