unimore/kernel-hacking-2024-linux-steffo
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Bluetooth: Ignore too large handle values in BIG

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hci_le_big_sync_established_evt is necessary to filter out cases where the
handle value is belonging to ida id range, otherwise ida will be erroneously
released in hci_conn_cleanup.

Fixes: 181a42eddd ("Bluetooth: Make handle of hci_conn be unique")
Reported-by: syzbot+b2545b087a01a7319474@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=b2545b087a01a7319474
Signed-off-by: Edward Adam Davis <eadavis@qq.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Edward Adam Davis 2024-06-17 19:09:37 +08:00 committed by Luiz Augusto von Dentz
parent 4183a7be77
commit 015d79c96d
1 changed files with 4 additions and 0 deletions
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4
net/bluetooth/hci_event.c
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@ -6916,6 +6916,10 @@ static void hci_le_big_sync_established_evt(struct hci_dev *hdev, void *data,
bis = hci_conn_hash_lookup_handle(hdev, handle);
if (!bis) {
if (handle > HCI_CONN_HANDLE_MAX) {
bt_dev_dbg(hdev, "ignore too large handle %u", handle);
continue;
}
bis = hci_conn_add(hdev, ISO_LINK, BDADDR_ANY,
HCI_ROLE_SLAVE, handle);
if (IS_ERR(bis))