CVE-2025-21798 firewire: test: Fix potential null dereference in firewire kunit test

In the Linux kernel, the following vulnerability has been resolved: firewire: test: Fix potential null dereference in firewire kunit test kunitkzalloc may return a NULL pointer, dereferencing it without NULL check may lead to NULL dereference. Add a NULL check for teststate...

CVE-2025-21798

CVE-2025-21798 concerns the Linux kernel FireWire kunit test. The vulnerability arises when kunit_kzalloc() returns NULL and test_state is dereferenced without a NULL check, potentially causing a NULL pointer dereference. A fix adds a NULL check for test_state to prevent dereferencing a NULL poin...