This is a note to let you know that I've just added the patch titled
x86/efi: Free efi_pgd with free_pages()
to the 4.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
x86-efi-free-efi_pgd-with-free_pages.patch
and it can be found in the queue-4.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 06ace26f4e6fcf747e890a39193be811777a048a Mon Sep 17 00:00:00 2001
From: Waiman Long <longman@xxxxxxxxxx>
Date: Thu, 22 Mar 2018 15:18:53 -0400
Subject: x86/efi: Free efi_pgd with free_pages()
From: Waiman Long <longman@xxxxxxxxxx>
commit 06ace26f4e6fcf747e890a39193be811777a048a upstream.
The efi_pgd is allocated as PGD_ALLOCATION_ORDER pages and therefore must
also be freed as PGD_ALLOCATION_ORDER pages with free_pages().
Fixes: d9e9a6418065 ("x86/mm/pti: Allocate a separate user PGD")
Signed-off-by: Waiman Long <longman@xxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: linux-efi@xxxxxxxxxxxxxxx
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Link: https://lkml.kernel.org/r/1521746333-19593-1-git-send-email-longman@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/platform/efi/efi_64.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/platform/efi/efi_64.c
+++ b/arch/x86/platform/efi/efi_64.c
@@ -228,7 +228,7 @@ int __init efi_alloc_page_tables(void)
if (!pud) {
if (CONFIG_PGTABLE_LEVELS > 4)
free_page((unsigned long) pgd_page_vaddr(*pgd));
- free_page((unsigned long)efi_pgd);
+ free_pages((unsigned long)efi_pgd, PGD_ALLOCATION_ORDER);
return -ENOMEM;
}
Patches currently in stable-queue which might be from longman@xxxxxxxxxx are
queue-4.15/x86-efi-free-efi_pgd-with-free_pages.patch