CVE-2023-54186 usb: typec: altmodes/displayport: fix pin_assignment_show

In the Linux kernel, the following vulnerability has been resolved: usb: typec: altmodes/displayport: fix pinassignmentshow This patch fixes negative indexing of buf array in pinassignmentshow when getcurrentpinassignments returns 0 i.e. no compatible pin assignments are found. BUG: KASAN:...