[Bug 30850] New: use-after-free error when running Gigasoft ProEssentials graph component?
wine-bugs at winehq.org
wine-bugs at winehq.org
Thu Jul 26 09:40:33 CDT 2012
http://bugs.winehq.org/show_bug.cgi?id=30850
Bug #: 30850
Summary: use-after-free error when running Gigasoft
ProEssentials graph component?
Product: Wine
Version: 1.5.5
Platform: x86
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: -unknown
AssignedTo: wine-bugs at winehq.org
ReportedBy: dank at kegel.com
Classification: Unclassified
A real app that uses gigasoft's graphing component is having
a strange clipping problem when using gigasoft's "scientific graph"
component. Their canned demo doesn't run well enough to test that component
(see bug 30826), so I extracted just the part that displays
a "scientific" graph. It seems to run fine, but valgrind complains
about some use-after-free problems:
Invalid read of size 4
at HEAP_FindFreeBlock (heap.c:1003)
by RtlAllocateHeap (heap.c:1688)
by init_region (region.c:485)
by REGION_RegionOp (region.c:1742)
by REGION_UnionRegion (region.c:2170)
by CombineRgn (region.c:1366)
by add_cap.isra.7 (objects.c:1227)
by wide_line_segments (objects.c:1470)
by wide_pen_lines (objects.c:1526)
by dibdrv_LineTo (graphics.c:891)
by LineTo (painting.c:242)
by ??? (in /home/dank/demo100/PEGRP32E.DLL)
by EnumMetaFile (metafile.c:537)
by ??? (in /home/dank/demo100/PEGRP32E.DLL)
This looks a lot like the warn+heap crash in bug 30826.
Right-clicking on the demo and exporting it as a .wmf,
then loading it in to a simple app that plays back
metafiles with PlayMetaFile under valgrind shows no warnings in playback.
Source, executable, and a script to install visual C++ and compile
the executable are attached.
To reproduce: see last few lines of demo.sh in the attached archive.
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