This is a note to let you know that I've just added the patch titled
efi: Process the MEMATTR table only if EFI_MEMMAP is enabled
to the 4.12-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:
efi-process-the-memattr-table-only-if-efi_memmap-is-enabled.patch
and it can be found in the queue-4.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 457ea3f7e97881f937136ce0ba1f29f82b9abdb0 Mon Sep 17 00:00:00 2001
From: Daniel Kiper <daniel.kiper@xxxxxxxxxx>
Date: Thu, 22 Jun 2017 12:51:36 +0200
Subject: efi: Process the MEMATTR table only if EFI_MEMMAP is enabled
From: Daniel Kiper <daniel.kiper@xxxxxxxxxx>
commit 457ea3f7e97881f937136ce0ba1f29f82b9abdb0 upstream.
Otherwise e.g. Xen dom0 on x86_64 EFI platforms crashes.
In theory we can check EFI_PARAVIRT too, however,
EFI_MEMMAP looks more targeted and covers more cases.
Signed-off-by: Daniel Kiper <daniel.kiper@xxxxxxxxxx>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: andrew.cooper3@xxxxxxxxxx
Cc: boris.ostrovsky@xxxxxxxxxx
Cc: jgross@xxxxxxxx
Cc: linux-efi@xxxxxxxxxxxxxxx
Cc: matt@xxxxxxxxxxxxxxxxxxx
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx
Link: http://lkml.kernel.org/r/1498128697-12943-2-git-send-email-daniel.kiper@xxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/firmware/efi/efi.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -528,7 +528,8 @@ int __init efi_config_parse_tables(void
}
}
- efi_memattr_init();
+ if (efi_enabled(EFI_MEMMAP))
+ efi_memattr_init();
/* Parse the EFI Properties table if it exists */
if (efi.properties_table != EFI_INVALID_TABLE_ADDR) {
Patches currently in stable-queue which might be from daniel.kiper@xxxxxxxxxx are
queue-4.12/efi-process-the-memattr-table-only-if-efi_memmap-is-enabled.patch
queue-4.12/x86-xen-efi-initialize-only-the-efi-struct-members-used-by-xen.patch