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Test for invalid large handles in GDI_GetObjPtr and GDI_FreeObject.

This commit is contained in:
Gerard Patel 2001-08-18 16:08:27 +00:00 committed by Alexandre Julliard
parent 0a5ab16aee
commit 4bd80eaa5f
1 changed files with 4 additions and 2 deletions
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6
objects/gdiobj.c
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@ -320,11 +320,12 @@ BOOL GDI_FreeObject( HGDIOBJ handle, void *ptr )
else /* large heap handle */
{
int i = (handle >> 2) - FIRST_LARGE_HANDLE;
if (i >= 0 && large_handles[i])
if (i >= 0 && i < MAX_LARGE_HANDLES && large_handles[i])
{
HeapFree( GetProcessHeap(), 0, large_handles[i] );
large_handles[i] = NULL;
}
else ERR( "Invalid handle %x\n", handle );
}
TRACE_SEC( handle, "leave" );
_LeaveSysLevel( &GDI_level );
@ -357,7 +358,7 @@ void *GDI_GetObjPtr( HGDIOBJ handle, WORD magic )
else /* large heap handle */
{
int i = (handle >> 2) - FIRST_LARGE_HANDLE;
if (i >= 0)
if (i >= 0 && i < MAX_LARGE_HANDLES)
{
ptr = large_handles[i];
if (ptr && (magic != MAGIC_DONTCARE) && (GDIMAGIC(ptr->wMagic) != magic)) ptr = NULL;
@ -368,6 +369,7 @@ void *GDI_GetObjPtr( HGDIOBJ handle, WORD magic )
{
_LeaveSysLevel( &GDI_level );
SetLastError( ERROR_INVALID_HANDLE );
WARN( "Invalid handle %x\n", handle );
}
else TRACE_SEC( handle, "enter" );