From b988320dab539678a19466834012f75d7883cfc7 Mon Sep 17 00:00:00 2001 From: Gerald Schaefer Date: Mon, 21 Nov 2016 12:13:58 +0100 Subject: s390/vmlogrdr: fix IUCV buffer allocation 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 Signed-off-by: Martin Schwidefsky Signed-off-by: Greg Kroah-Hartman --- drivers/s390/char/vmlogrdr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/s390') diff --git a/drivers/s390/char/vmlogrdr.c b/drivers/s390/char/vmlogrdr.c index 799c1524c779..4b8de3e70cf2 100644 --- a/drivers/s390/char/vmlogrdr.c +++ b/drivers/s390/char/vmlogrdr.c @@ -872,7 +872,7 @@ 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; -- cgit v1.2.3