CVE-2023-52567

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> serial: 8250_port: Check IRQ data before use<br /> <br /> In case the leaf driver wants to use IRQ polling (irq = 0) and<br /> IIR register shows that an interrupt happened in the 8250 hardware<br /> the IRQ data can be NULL. In such a case we need to skip the wake<br /> event as we came to this path from the timer interrupt and quite<br /> likely system is already awake.<br /> <br /> Without this fix we have got an Oops:<br /> <br /> serial8250: ttyS0 at I/O 0x3f8 (irq = 0, base_baud = 115200) is a 16550A<br /> ...<br /> BUG: kernel NULL pointer dereference, address: 0000000000000010<br /> RIP: 0010:serial8250_handle_irq+0x7c/0x240<br /> Call Trace:<br /> ? serial8250_handle_irq+0x7c/0x240<br /> ? __pfx_serial8250_timeout+0x10/0x10