CVE-2023-52513

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> RDMA/siw: Fix connection failure handling<br /> <br /> In case immediate MPA request processing fails, the newly<br /> created endpoint unlinks the listening endpoint and is<br /> ready to be dropped. This special case was not handled<br /> correctly by the code handling the later TCP socket close,<br /> causing a NULL dereference crash in siw_cm_work_handler()<br /> when dereferencing a NULL listener. We now also cancel<br /> the useless MPA timeout, if immediate MPA request<br /> processing fails.<br /> <br /> This patch furthermore simplifies MPA processing in general:<br /> Scheduling a useless TCP socket read in sk_data_ready() upcall<br /> is now surpressed, if the socket is already moved out of<br /> TCP_ESTABLISHED state.