CVE-2023-54167

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> m68k: mm: Move initrd phys_to_virt handling after paging_init()<br /> <br /> When booting with an initial ramdisk on platforms where physical memory<br /> does not start at address zero (e.g. on Amiga):<br /> <br /> initrd: 0ef0602c - 0f800000<br /> Zone ranges:<br /> DMA [mem 0x0000000008000000-0x000000f7ffffffff]<br /> Normal empty<br /> Movable zone start for each node<br /> Early memory node ranges<br /> node 0: [mem 0x0000000008000000-0x000000000f7fffff]<br /> Initmem setup node 0 [mem 0x0000000008000000-0x000000000f7fffff]<br /> Unable to handle kernel access at virtual address (ptrval)<br /> Oops: 00000000<br /> Modules linked in:<br /> PC: [] memcmp+0x28/0x56<br /> <br /> As phys_to_virt() relies on m68k_memoffset and module_fixup(), it must<br /> not be called before paging_init(). Hence postpone the phys_to_virt<br /> handling for the initial ramdisk until after calling paging_init().<br /> <br /> While at it, reduce #ifdef clutter by using IS_ENABLED() instead.