Description
In the Linux kernel, the following vulnerability has been resolved: m68k: mm: Move initrd phys_to_virt handling after paging_init() When booting with an initial ramdisk on platforms where physical memory does not start at address zero (e.g. on Amiga): initrd: 0ef0602c - 0f800000 Zone ranges: DMA [mem 0x0000000008000000-0x000000f7ffffffff] Normal empty Movable zone start for each node Early memory node ranges node 0: [mem 0x0000000008000000-0x000000000f7fffff] Initmem setup node 0 [mem 0x0000000008000000-0x000000000f7fffff] Unable to handle kernel access at virtual address (ptrval) Oops: 00000000 Modules linked in: PC: [<00201d3c>] memcmp+0x28/0x56 As phys_to_virt() relies on m68k_memoffset and module_fixup(), it must not be called before paging_init(). Hence postpone the phys_to_virt handling for the initial ramdisk until after calling paging_init(). While at it, reduce #ifdef clutter by using IS_ENABLED() instead.
Product status
376e3fdecb0dcae216c0ac559cff066f460bf47b (git) before ceb089e2337f810d3594d310953d9af4783f660a
376e3fdecb0dcae216c0ac559cff066f460bf47b (git) before 58662cfb459150b9c0c22d20cddaea439b3844bd
376e3fdecb0dcae216c0ac559cff066f460bf47b (git) before d4b97925e87eb133e400fe4a482d750c74ce392f
5.17
Any version before 5.17
6.1.20 (semver)
6.2.7 (semver)
6.3 (original_commit_for_fix)
References
git.kernel.org/...c/ceb089e2337f810d3594d310953d9af4783f660a
git.kernel.org/...c/58662cfb459150b9c0c22d20cddaea439b3844bd
git.kernel.org/...c/d4b97925e87eb133e400fe4a482d750c74ce392f
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