4.17-stable review patch. If anyone has any objections, please let me know. ------------------ From: Juergen Gross <jgross@xxxxxxxx> commit e69b5d308da72cbf4e7911c3979f9a46d28532af upstream. When removing the global bit from __supported_pte_mask do the same for __default_kernel_pte_mask in order to avoid the WARN_ONCE() in check_pgprot() when setting a kernel pte before having called init_mem_mapping(). Cc: <stable@xxxxxxxxxxxxxxx> # 4.17 Reported-by: Michael Young <m.a.young@xxxxxxxxxxxx> Signed-off-by: Juergen Gross <jgross@xxxxxxxx> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx> Signed-off-by: Juergen Gross <jgross@xxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/x86/xen/enlighten_pv.c | 1 + 1 file changed, 1 insertion(+) --- a/arch/x86/xen/enlighten_pv.c +++ b/arch/x86/xen/enlighten_pv.c @@ -1228,6 +1228,7 @@ asmlinkage __visible void __init xen_sta /* Prevent unwanted bits from being set in PTEs. */ __supported_pte_mask &= ~_PAGE_GLOBAL; + __default_kernel_pte_mask &= ~_PAGE_GLOBAL; /* * Prevent page tables from being allocated in highmem, even
