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Fix heap corruption on Windows in FcEndElement() 

Must not call FcStrFree() on a value returned by
FcStrBufDoneStatic(). In the Windows code don't bother with dynamic
allocation, just use a local buffer.
This commit is contained in:
Tor Lillqvist 2009-08-14 00:08:17 +03:00 committed by Behdad Esfahbod
parent a1b6e34a9a
commit d15678127a
1 changed files with 11 additions and 32 deletions
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41
src/fcxml.c
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@ -2031,6 +2031,9 @@ FcEndElement(void *userData, const XML_Char *name)
{
FcConfigParse *parse = userData;
FcChar8 *data;
#ifdef _WIN32
FcChar8 buffer[1000];
#endif
if (!parse->pstack)
return;
@ -2050,18 +2053,10 @@ FcEndElement(void *userData, const XML_Char *name)
if (strcmp (data, "CUSTOMFONTDIR") == 0)
{
char *p;
FcStrFree (data);
data = malloc (1000);
if (!data)
{
FcConfigMessage (parse, FcSevereError, "out of memory");
break;
}
FcMemAlloc (FC_MEM_STRING, 1000);
if(!GetModuleFileName(NULL, data, 1000))
data = buffer;
if (!GetModuleFileName (NULL, buffer, sizeof (buffer) - 20))
{
FcConfigMessage (parse, FcSevereError, "GetModuleFileName failed");
FcStrFree (data);
break;
}
p = strrchr (data, '\\');
@ -2071,18 +2066,10 @@ FcEndElement(void *userData, const XML_Char *name)
else if (strcmp (data, "APPSHAREFONTDIR") == 0)
{
char *p;
FcStrFree (data);
data = malloc (1000);
if (!data)
{
FcConfigMessage (parse, FcSevereError, "out of memory");
break;
}
FcMemAlloc (FC_MEM_STRING, 1000);
if(!GetModuleFileName(NULL, data, 1000))
data = buffer;
if (!GetModuleFileName (NULL, buffer, sizeof (buffer) - 20))
{
FcConfigMessage (parse, FcSevereError, "GetModuleFileName failed");
FcStrFree (data);
break;
}
p = strrchr (data, '\\');
@ -2092,19 +2079,11 @@ FcEndElement(void *userData, const XML_Char *name)
else if (strcmp (data, "WINDOWSFONTDIR") == 0)
{
int rc;
FcStrFree (data);
data = malloc (1000);
if (!data)
{
FcConfigMessage (parse, FcSevereError, "out of memory");
break;
}
FcMemAlloc (FC_MEM_STRING, 1000);
rc = GetSystemWindowsDirectory (data, 800);
if (rc == 0 || rc > 800)
data = buffer;
rc = GetSystemWindowsDirectory (buffer, sizeof (buffer) - 20);
if (rc == 0 || rc > sizeof (buffer) - 20)
{
FcConfigMessage (parse, FcSevereError, "GetSystemWindowsDirectory failed");
FcStrFree (data);
break;
}
if (data [strlen (data) - 1] != '\\')