Re: bug disabling NX (noexec=off)

[Thomas Gleixner]

On Sat, 13 Apr 2019, Xose Vazquez Perez wrote:
> [    0.000000] NX (Execute Disable) protection: disabled by kernel command 
> line option
> [    0.000000] ------------[ cut here ]------------
> [    0.000000] attempted to set unsupported pgprot: 8000000000000163 bits: 
> 8000000000000000 supported: 7fffffffffffffff

Does the below patch fix it for you?

Thanks,

        tglx

8<----------------
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 0029604af8a4..dd73d5d74393 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -825,7 +825,7 @@ void __init __early_set_fixmap(enum fixed_addresses idx,
        pte = early_ioremap_pte(addr);
 
        /* Sanitize 'prot' against any unsupported bits: */
-       pgprot_val(flags) &= __default_kernel_pte_mask;
+       pgprot_val(flags) &= __supported_pte_mask;
 
        if (pgprot_val(flags))
                set_pte(pte, pfn_pte(phys >> PAGE_SHIFT, flags));