Patch "EDAC, amd64: Add x86cpuid sanity check during init" has been added to the 4.9-stable tree

Patch "EDAC, amd64: Add x86cpuid sanity check during init" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    EDAC, amd64: Add x86cpuid sanity check during init

to the 4.9-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:
     edac-amd64-add-x86cpuid-sanity-check-during-init.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Thu Nov  9 09:48:01 CET 2017
From: Yazen Ghannam <Yazen.Ghannam@amd.com>
Date: Fri, 27 Jan 2017 11:24:23 -0600
Subject: EDAC, amd64: Add x86cpuid sanity check during init

From: Yazen Ghannam <Yazen.Ghannam@amd.com>


[ Upstream commit 1bd9900b8301fc505f032c90ea487824cf824e99 ]

Match one of the devices in amd64_cpuids[] before loading the module.
This is an additional sanity check against users trying to load
amd64_edac_mod on unsupported systems.

Signed-off-by: Yazen Ghannam <Yazen.Ghannam@amd.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/1485537863-2707-9-git-send-email-Yazen.Ghannam@amd.com
[ Get rid of err_ret label, make it a bit more readable this way. ]
Signed-off-by: Borislav Petkov <bp@suse.de>

Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/edac/amd64_edac.c |    6 ++++--
 drivers/edac/amd64_edac.h |    1 +
 2 files changed, 5 insertions(+), 2 deletions(-)

--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -2984,8 +2984,11 @@ static int __init amd64_edac_init(void)
 	int err = -ENODEV;
 	int i;
 
+	if (!x86_match_cpu(amd64_cpuids))
+		return -ENODEV;
+
 	if (amd_cache_northbridges() < 0)
-		goto err_ret;
+		return -ENODEV;
 
 	opstate_init();
 
@@ -3025,7 +3028,6 @@ err_free:
 	kfree(ecc_stngs);
 	ecc_stngs = NULL;
 
-err_ret:
 	return err;
 }
 
--- a/drivers/edac/amd64_edac.h
+++ b/drivers/edac/amd64_edac.h
@@ -16,6 +16,7 @@
 #include <linux/slab.h>
 #include <linux/mmzone.h>
 #include <linux/edac.h>
+#include <asm/cpu_device_id.h>
 #include <asm/msr.h>
 #include "edac_core.h"
 #include "mce_amd.h"


Patches currently in stable-queue which might be from Yazen.Ghannam@amd.com are

queue-4.9/edac-amd64-add-x86cpuid-sanity-check-during-init.patch
queue-4.9/edac-amd64-save-and-return-err-code-from-probe_one_instance.patch