This is a note to let you know that I've just added the patch titled
powerpc: Fix Oops in rtas_stop_self()
to the 3.14-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:
powerpc-fix-oops-in-rtas_stop_self.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 4fb8d027dca0236c811272d342cf185569d91311 Mon Sep 17 00:00:00 2001
From: Li Zhong <zhong@xxxxxxxxxxxxxxxxxx>
Date: Mon, 28 Apr 2014 08:29:51 +0800
Subject: powerpc: Fix Oops in rtas_stop_self()
From: Li Zhong <zhong@xxxxxxxxxxxxxxxxxx>
commit 4fb8d027dca0236c811272d342cf185569d91311 upstream.
commit 41dd03a9 may cause Oops in rtas_stop_self().
The reason is that the rtas_args was moved into stack space. For a box
with more that 4GB RAM, the stack could easily be outside 32bit range,
but RTAS is 32bit.
So the patch moves rtas_args away from stack by adding static before
it.
Signed-off-by: Li Zhong <zhong@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Anton Blanchard <anton@xxxxxxxxx>
Signed-off-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/platforms/pseries/hotplug-cpu.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/arch/powerpc/platforms/pseries/hotplug-cpu.c
+++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c
@@ -88,13 +88,14 @@ void set_default_offline_state(int cpu)
static void rtas_stop_self(void)
{
- struct rtas_args args = {
- .token = cpu_to_be32(rtas_stop_self_token),
+ static struct rtas_args args = {
.nargs = 0,
.nret = 1,
.rets = &args.args[0],
};
+ args.token = cpu_to_be32(rtas_stop_self_token);
+
local_irq_disable();
BUG_ON(rtas_stop_self_token == RTAS_UNKNOWN_SERVICE);
Patches currently in stable-queue which might be from zhong@xxxxxxxxxxxxxxxxxx are
queue-3.14/powerpc-fix-oops-in-rtas_stop_self.patch
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