This is a note to let you know that I've just added the patch titled
powerpc/tm: Fix null pointer deference in flush_hash_page
to the 3.9-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:
powerpc-tm-fix-null-pointer-deference-in-flush_hash_page.patch
and it can be found in the queue-3.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From c2fd22df89365df9451d5b91da3b7bfd48122ecd Mon Sep 17 00:00:00 2001
From: Michael Neuling <mikey@xxxxxxxxxxx>
Date: Thu, 2 May 2013 15:36:14 +0000
Subject: powerpc/tm: Fix null pointer deference in flush_hash_page
From: Michael Neuling <mikey@xxxxxxxxxxx>
commit c2fd22df89365df9451d5b91da3b7bfd48122ecd upstream.
Make sure that current->thread.reg exists before we deference it in
flush_hash_page.
Signed-off-by: Michael Neuling <mikey@xxxxxxxxxxx>
Reported-by: John J Miller <millerjo@xxxxxxxxxx>
Signed-off-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/mm/hash_utils_64.c | 1 +
1 file changed, 1 insertion(+)
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -1191,6 +1191,7 @@ void flush_hash_page(unsigned long vpn,
* unmapping it first, it may see the speculated version.
*/
if (local && cpu_has_feature(CPU_FTR_TM) &&
+ current->thread.regs &&
MSR_TM_ACTIVE(current->thread.regs->msr)) {
tm_enable();
tm_abort(TM_CAUSE_TLBI);
Patches currently in stable-queue which might be from mikey@xxxxxxxxxxx are
queue-3.9/powerpc-tm-fix-null-pointer-deference-in-flush_hash_page.patch
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