Wind River Support Network

Description

In the Linux kernel, the following vulnerability has been resolved:[EOL][EOL]usb: gadget: u_serial: Add null pointer check in gserial_resume[EOL][EOL]Consider a case where gserial_disconnect has already cleared[EOL]gser->ioport. And if a wakeup interrupt triggers afterwards,[EOL]gserial_resume gets called, which will lead to accessing of[EOL]gser->ioport and thus causing null pointer dereference.Add[EOL]a null pointer check to prevent this.[EOL][EOL]Added a static spinlock to prevent gser->ioport from becoming[EOL]null after the newly added check.