Nikolay Sivov : usp10: Ignore device tables with invalid delta format.
Alexandre Julliard
julliard at winehq.org
Thu Jul 20 12:11:30 CDT 2017
Module: wine
Branch: stable
Commit: 179500a7ef2db21f9a20ed06ac3f41765640befb
URL: http://source.winehq.org/git/wine.git/?a=commit;h=179500a7ef2db21f9a20ed06ac3f41765640befb
Author: Nikolay Sivov <nsivov at codeweavers.com>
Date: Mon Feb 20 02:36:39 2017 +0300
usp10: Ignore device tables with invalid delta format.
Signed-off-by: Nikolay Sivov <nsivov at codeweavers.com>
Signed-off-by: Aric Stewart <aric at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>
(cherry picked from commit fefd15118fa643c16a34be889baf79cda1768a0f)
Signed-off-by: Michael Stefaniuc <mstefani at winehq.org>
---
dlls/usp10/opentype.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/dlls/usp10/opentype.c b/dlls/usp10/opentype.c
index d7afbe1..d20361e 100644
--- a/dlls/usp10/opentype.c
+++ b/dlls/usp10/opentype.c
@@ -1114,10 +1114,18 @@ static INT GPOS_get_device_table_value(const OT_DeviceTable *DeviceTable, WORD p
static const WORD mask[3] = {3,0xf,0xff};
if (DeviceTable && ppem >= GET_BE_WORD(DeviceTable->StartSize) && ppem <= GET_BE_WORD(DeviceTable->EndSize))
{
- int format = GET_BE_WORD(DeviceTable->DeltaFormat);
+ WORD format = GET_BE_WORD(DeviceTable->DeltaFormat);
int index = ppem - GET_BE_WORD(DeviceTable->StartSize);
int value;
- TRACE("device table, format %i, index %i\n",format, index);
+
+ TRACE("device table, format %#x, index %i\n", format, index);
+
+ if (format & ~0x3)
+ {
+ WARN("invalid delta format %#x\n", format);
+ return 0;
+ }
+
index = index << format;
value = (DeviceTable->DeltaValue[index/sizeof(WORD)] << (index%sizeof(WORD)))&mask[format-1];
TRACE("offset %i, value %i\n",index, value);
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