This is a note to let you know that I've just added the patch titled
perf/x86/intel/uncore: Fix wrong box pointer check
to the 4.11-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:
perf-x86-intel-uncore-fix-wrong-box-pointer-check.patch
and it can be found in the queue-4.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 80c65fdb4c6920e332a9781a3de5877594b07522 Mon Sep 17 00:00:00 2001
From: Kan Liang <kan.liang@xxxxxxxxx>
Date: Thu, 29 Jun 2017 12:09:26 -0700
Subject: perf/x86/intel/uncore: Fix wrong box pointer check
From: Kan Liang <kan.liang@xxxxxxxxx>
commit 80c65fdb4c6920e332a9781a3de5877594b07522 upstream.
Should not init a NULL box. It will cause system crash.
The issue looks like caused by a typo.
This was not noticed because there is no NULL box. Also, for most
boxes, they are enabled by default. The init code is not critical.
Fixes: fff4b87e594a ("perf/x86/intel/uncore: Make package handling more robust")
Signed-off-by: Kan Liang <kan.liang@xxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/20170629190926.2456-1-kan.liang@xxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/events/intel/uncore.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/events/intel/uncore.c
+++ b/arch/x86/events/intel/uncore.c
@@ -1170,7 +1170,7 @@ static int uncore_event_cpu_online(unsig
pmu = type->pmus;
for (i = 0; i < type->num_boxes; i++, pmu++) {
box = pmu->boxes[pkg];
- if (!box && atomic_inc_return(&box->refcnt) == 1)
+ if (box && atomic_inc_return(&box->refcnt) == 1)
uncore_box_init(box);
}
}
Patches currently in stable-queue which might be from kan.liang@xxxxxxxxx are
queue-4.11/perf-x86-intel-uncore-fix-wrong-box-pointer-check.patch