This is a note to let you know that I've just added the patch titled
s390/vmlogrdr: fix IUCV buffer allocation
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:
s390-vmlogrdr-fix-iucv-buffer-allocation.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 5457e03de918f7a3e294eb9d26a608ab8a579976 Mon Sep 17 00:00:00 2001
From: Gerald Schaefer <gerald.schaefer@xxxxxxxxxx>
Date: Mon, 21 Nov 2016 12:13:58 +0100
Subject: s390/vmlogrdr: fix IUCV buffer allocation
From: Gerald Schaefer <gerald.schaefer@xxxxxxxxxx>
commit 5457e03de918f7a3e294eb9d26a608ab8a579976 upstream.
The buffer for iucv_message_receive() needs to be below 2 GB. In
__iucv_message_receive(), the buffer address is casted to an u32, which
would result in either memory corruption or an addressing exception when
using addresses >= 2 GB.
Fix this by using GFP_DMA for the buffer allocation.
Signed-off-by: Gerald Schaefer <gerald.schaefer@xxxxxxxxxx>
Signed-off-by: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/s390/char/vmlogrdr.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/s390/char/vmlogrdr.c
+++ b/drivers/s390/char/vmlogrdr.c
@@ -870,7 +870,7 @@ static int __init vmlogrdr_init(void)
goto cleanup;
for (i=0; i < MAXMINOR; ++i ) {
- sys_ser[i].buffer = (char *) get_zeroed_page(GFP_KERNEL);
+ sys_ser[i].buffer = (char *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
if (!sys_ser[i].buffer) {
rc = -ENOMEM;
break;
Patches currently in stable-queue which might be from gerald.schaefer@xxxxxxxxxx are
queue-4.8/s390-vmlogrdr-fix-iucv-buffer-allocation.patch
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