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Change History

In the Linux kernel, the following vulnerability has been resolved:

riscv: Fix loading 64-bit NOMMU kernels past the start of RAM

commit 3335068f8721 ("riscv: Use PUD/P4D/PGD pages for the linear
mapping") added logic to allow using RAM below the kernel load address.
However, this does not work for NOMMU, where PAGE_OFFSET is fixed to the
kernel load address. Since that range of memory corresponds to PFNs
below ARCH_PFN_OFFSET, mm initialization runs off the beginning of
mem_map and corrupts a

kernel.org https://git.kernel.org/stable/c/aea702dde7e9876fb00571a2602f25130847bf0f [No types assigned]

kernel.org https://git.kernel.org/stable/c/b008e327fa570aca210f98c817757649bae56694 [No types assigned]

kernel.org https://git.kernel.org/stable/c/ea6628e4e2353978af7e3b4ad4fdaab6149acf3d [No types assigned]