CVE-2023-54146 x86/kexec: Fix double-free of elf header buffer

In the Linux kernel, the following vulnerability has been resolved: x86/kexec: Fix double-free of elf header buffer After b3e34a47f989 "x86/kexec: fix memory leak of elf header buffer", freeing image-elfheaders in the error path of crashloadsegments is not needed because kimagefilepostloadcleanup...