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authorGerald Schaefer <gerald.schaefer@de.ibm.com>2016-11-21 14:13:58 +0300
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2016-12-12 11:01:25 +0300
commit5457e03de918f7a3e294eb9d26a608ab8a579976 (patch)
treed7247c21f61f9db96e02b57a8ed9d902b730b03c /drivers/s390/char
parent9e6e7c74315095fd40f41003850690c711e44420 (diff)
downloadlinux-5457e03de918f7a3e294eb9d26a608ab8a579976.tar.xz
s390/vmlogrdr: fix IUCV buffer allocation
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. Cc: stable@vger.kernel.org Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/char')
-rw-r--r--drivers/s390/char/vmlogrdr.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/s390/char/vmlogrdr.c b/drivers/s390/char/vmlogrdr.c
index e883063c7258..3167e8581994 100644
--- 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;