This is a note to let you know that I've just added the patch titled
x86/mce/AMD: Make the init code more robust
to the 4.4-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-mce-amd-make-the-init-code-more-robust.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Fri Aug 4 13:34:53 PDT 2017
From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Date: Mon, 26 Dec 2016 22:58:20 +0100
Subject: x86/mce/AMD: Make the init code more robust
From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
[ Upstream commit 0dad3a3014a0b9e72521ff44f17e0054f43dcdea ]
If mce_device_init() fails then the mce device pointer is NULL and the
AMD mce code happily dereferences it.
Add a sanity check.
Reported-by: Markus Trippelsdorf <markus@xxxxxxxxxxxxxxx>
Reported-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/kernel/cpu/mcheck/mce_amd.c | 3 +++
1 file changed, 3 insertions(+)
--- a/arch/x86/kernel/cpu/mcheck/mce_amd.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_amd.c
@@ -682,6 +682,9 @@ static int threshold_create_bank(unsigne
const char *name = th_names[bank];
int err = 0;
+ if (!dev)
+ return -ENODEV;
+
if (is_shared_bank(bank)) {
nb = node_to_amd_nb(amd_get_nb_id(cpu));
Patches currently in stable-queue which might be from tglx@xxxxxxxxxxxxx are
queue-4.4/sched-cputime-fix-prev-steal-time-accouting-during-cpu-hotplug.patch
queue-4.4/sched-cgroup-move-sched_online_group-back-into-css_online-to-fix-crash.patch
queue-4.4/x86-mce-amd-make-the-init-code-more-robust.patch