CVE-2025-38473 Bluetooth: Fix null-ptr-deref in l2cap_sock_resume_cb()

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: Fix null-ptr-deref in l2capsockresumecb syzbot reported null-ptr-deref in l2capsockresumecb. 0 l2capsockresumecb has a similar problem that was fixed by commit 1bff51ea59a9 "Bluetooth: fix use-after-free error in...