CVE-2023-53551

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

• linux linux kernel (>= 5.8 < 5.10.171) • linux linux kernel (>= 5.11 < 5.15.97) • linux linux kernel (>= 5.16 < 6.1.15) • linux linux kernel (>= 6.2 < 6.2.2)