CVE-2024-46706 tty: serial: fsl_lpuart: mark last busy before uart_add_one_port

In the Linux kernel, the following vulnerability has been resolved: tty: serial: fsllpuart: mark last busy before uartaddoneport With "earlycon initcalldebug=1 loglevel=8" in bootargs, kernel sometimes boot hang. It is because normal console still is not ready, but runtime suspend is called, so...

CVE-2024-46706

The connected documents provide concrete details for CVE-2024-46706 in the Linux kernel: the issue lies in the fsl_lpuart driver where, during uart_add_one_port, a child serial_ctrl is probed with PM runtime enabled, causing a runtime suspend race that can hang early console output when boot argu...