This is a note to let you know that I've just added the patch titled
KVM: s390: Fix STHYI buffer alignment for diag224
to the 4.8-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:
kvm-s390-fix-sthyi-buffer-alignment-for-diag224.patch
and it can be found in the queue-4.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 45c7ee43a5184ddbff652ee0d2e826f86f1b616b Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@xxxxxxxxxxxxxxxxxx>
Date: Wed, 26 Oct 2016 08:48:11 +0200
Subject: KVM: s390: Fix STHYI buffer alignment for diag224
From: Janosch Frank <frankja@xxxxxxxxxxxxxxxxxx>
commit 45c7ee43a5184ddbff652ee0d2e826f86f1b616b upstream.
Diag224 requires a page-aligned 4k buffer to store the name table
into. kmalloc does not guarantee page alignment, hence we replace it
with __get_free_page for the buffer allocation.
Reported-by: Michael Holzheu <holzheu@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Janosch Frank <frankja@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Cornelia Huck <cornelia.huck@xxxxxxxxxx>
Signed-off-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/s390/kvm/sthyi.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/s390/kvm/sthyi.c
+++ b/arch/s390/kvm/sthyi.c
@@ -315,7 +315,7 @@ static void fill_diag(struct sthyi_sctns
if (r < 0)
goto out;
- diag224_buf = kmalloc(PAGE_SIZE, GFP_KERNEL | GFP_DMA);
+ diag224_buf = (void *)__get_free_page(GFP_KERNEL | GFP_DMA);
if (!diag224_buf || diag224(diag224_buf))
goto out;
@@ -378,7 +378,7 @@ static void fill_diag(struct sthyi_sctns
sctns->par.infpval1 |= PAR_WGHT_VLD;
out:
- kfree(diag224_buf);
+ free_page((unsigned long)diag224_buf);
vfree(diag204_buf);
}
Patches currently in stable-queue which might be from frankja@xxxxxxxxxxxxxxxxxx are
queue-4.8/kvm-s390-fix-sthyi-buffer-alignment-for-diag224.patch
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