CVE-2024-50058

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> serial: protect uart_port_dtr_rts() in uart_shutdown() too<br /> <br /> Commit af224ca2df29 (serial: core: Prevent unsafe uart port access, part<br /> 3) added few uport == NULL checks. It added one to uart_shutdown(), so<br /> the commit assumes, uport can be NULL in there. But right after that<br /> protection, there is an unprotected "uart_port_dtr_rts(uport, false);"<br /> call. That is invoked only if HUPCL is set, so I assume that is the<br /> reason why we do not see lots of these reports.<br /> <br /> Or it cannot be NULL at this point at all for some reason :P.<br /> <br /> Until the above is investigated, stay on the safe side and move this<br /> dereference to the if too.<br /> <br /> I got this inconsistency from Coverity under CID 1585130. Thanks.