This is a note to let you know that I've just added the patch titled s390/vmlogrdr: fix IUCV buffer allocation to the 4.9-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: s390-vmlogrdr-fix-iucv-buffer-allocation.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 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-4.9/s390-vmlogrdr-fix-iucv-buffer-allocation.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html