6.9-stable review patch. If anyone has any objections, please let me know.
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From: Edward Adam Davis eadavis@qq.com
[ Upstream commit 015d79c96d62cd8a4a359fcf5be40d58088c936b ]
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: 181a42edddf5 ("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 Signed-off-by: Sasha Levin sashal@kernel.org --- net/bluetooth/hci_event.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c index 0b3a76fcfedf5..eb59f418eb6dc 100644 --- a/net/bluetooth/hci_event.c +++ b/net/bluetooth/hci_event.c @@ -6910,6 +6910,10 @@ 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))