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| author | Gerald Schaefer <gerald.schaefer@de.ibm.com> | 2016-11-21 14:13:58 +0300 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-12-12 11:01:25 +0300 |
| commit | 5457e03de918f7a3e294eb9d26a608ab8a579976 (patch) | |
| tree | d7247c21f61f9db96e02b57a8ed9d902b730b03c /drivers/s390/char | |
| parent | 9e6e7c74315095fd40f41003850690c711e44420 (diff) | |
| download | linux-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.c | 2 |
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; |