Wind River Support Network

Description

In the Linux kernel, the following vulnerability has been resolved:  powerpc/kexec_file: Fix null-ptr-def in extra size calculation  A static Sashiko AI review identified a potential NULL pointer dereference in kexec_extra_fdt_size_ppc64().  On platforms without any reserved memory regions, get_reserved_memory_ranges() can return 0 while leaving 'rmem' unallocated as NULL. Passing it directly leads to a kernel panic when evaluating 'rmem->nr_ranges'.  Add a NULL check for 'rmem' to prevent this crash.