From: Arvind Sankar <[email protected]> commit c8502eb2d43b6b9b1dc382299a4d37031be63876 upstream.
When remapping the kernel rodata section RO in the EFI pagetables, the protection flags that were used for the text section are being reused, but the rodata section should not be marked executable. Cc: <[email protected]> Signed-off-by: Arvind Sankar <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Ard Biesheuvel <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- arch/x86/platform/efi/efi_64.c | 2 ++ 1 file changed, 2 insertions(+) --- a/arch/x86/platform/efi/efi_64.c +++ b/arch/x86/platform/efi/efi_64.c @@ -269,6 +269,8 @@ int __init efi_setup_page_tables(unsigne npages = (__end_rodata - __start_rodata) >> PAGE_SHIFT; rodata = __pa(__start_rodata); pfn = rodata >> PAGE_SHIFT; + + pf = _PAGE_NX | _PAGE_ENC; if (kernel_map_pages_in_pgd(pgd, pfn, rodata, npages, pf)) { pr_err("Failed to map kernel rodata 1:1\n"); return 1;
