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author | Gerald Schaefer <gerald.schaefer@de.ibm.com> | 2016-11-21 11:13:58 (GMT) |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-09 07:32:22 (GMT) |
commit | 53bbee3348d88b9f68946e249a67beaff82aee6a (patch) | |
tree | bda8323c4ab9f6a16580b3c9a6c683ca2fd16139 /drivers/s390 | |
parent | b3854cefe3d24af43fb8abb3eda09612899bb604 (diff) | |
download | linux-53bbee3348d88b9f68946e249a67beaff82aee6a.tar.xz |
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/s390')
-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 e883063..3167e85 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; |