KKopyscinski opened a new pull request, #1766:
URL: https://github.com/apache/mynewt-nimble/pull/1766
Two functions: `ble_l2cap_coc_continue_tx` and `ble_l2cap_coc_recv_ready`
can be reached from other task than host, for example separate thread running
in application, by calling `ble_l2cap_recv_ready` or `ble_l2cap_send`. Because
pointer to chan passed into these functions may be outdated (connection is
being terminated by host) this will lead to either:
- triggering BLE_HS_DBG_ASSERT(conn != NULL) in ble_hs_conn_find_assert
- dereferencing NULL pointer to conn, after ble_hs_conn_find_assert returns
NULL (case with disabled BLE_HS_DEBUG) These two cases shall not cause assert,
and should be prepared for chan not existing anymore. Now, BLE_HS_ENOTCONN is
returned if connection no longer exists.
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