efi/x86: Free efi_pgd with free_pages()

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  d9e9a64180 ("x86/mm/pti: Allocate a separate user PGD")

changed the PGD allocation to allocate PGD_ALLOCATION_ORDER pages, so in
the error path it should be freed using free_pages() rather than
free_page().

Commit

    06ace26f4e ("x86/efi: Free efi_pgd with free_pages()")

fixed one instance of this, but missed another.

Move the freeing out-of-line to avoid code duplication and fix this bug.

Fixes: d9e9a64180 ("x86/mm/pti: Allocate a separate user PGD")
Link: https://lore.kernel.org/r/20201110163919.1134431-1-nivedita@alum.mit.edu
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

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This commit is contained in:

Arvind Sankar 2020-11-10 11:39:19 -05:00 • committed by Ard Biesheuvel

parent fe5186cf12

commit c2fe61d8be

1 changed files with 13 additions and 11 deletions

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arch/x86/platform/efi/efi_64.c

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