diff options
| author | Gerald Schaefer <gerald.schaefer@de.ibm.com> | 2016-11-21 12:13:58 +0100 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-07-04 11:51:16 +0200 |
| commit | 1fb2b0e746c9695673b897f5da3cd18ea2886254 (patch) | |
| tree | fe66fa973b10d62b23d9610b77d13ea82342d7d9 | |
| parent | 3d9b076ff9acda608d8202b2c539a13df6d8e6ab (diff) | |
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 <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
| -rw-r--r-- | drivers/s390/char/vmlogrdr.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/s390/char/vmlogrdr.c b/drivers/s390/char/vmlogrdr.c index 9b3a24e8d..5e41e8453 100644 --- a/drivers/s390/char/vmlogrdr.c +++ b/drivers/s390/char/vmlogrdr.c @@ -873,7 +873,7 @@ 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; |