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Diffstat (limited to 'src/GetFPath.c')
-rw-r--r--src/GetFPath.c36
1 files changed, 22 insertions, 14 deletions
diff --git a/src/GetFPath.c b/src/GetFPath.c
index 7d497c92..abd4a5db 100644
--- a/src/GetFPath.c
+++ b/src/GetFPath.c
@@ -28,15 +28,18 @@ in this Software without prior written authorization from The Open Group.
#include <config.h>
#endif
#include "Xlibint.h"
+#include <limits.h>
char **XGetFontPath(
register Display *dpy,
int *npaths) /* RETURN */
{
xGetFontPathReply rep;
- register long nbytes;
- char **flist;
- char *ch;
+ unsigned long nbytes;
+ char **flist = NULL;
+ char *ch = NULL;
+ char *chend;
+ int count = 0;
register unsigned i;
register int length;
register xReq *req;
@@ -46,16 +49,17 @@ char **XGetFontPath(
(void) _XReply (dpy, (xReply *) &rep, 0, xFalse);
if (rep.nPaths) {
- flist = (char **)
- Xmalloc((unsigned) rep.nPaths * sizeof (char *));
- nbytes = (long)rep.length << 2;
- ch = (char *) Xmalloc ((unsigned) (nbytes + 1));
+ flist = Xmalloc(rep.nPaths * sizeof (char *));
+ if (rep.length < (LONG_MAX >> 2)) {
+ nbytes = (unsigned long) rep.length << 2;
+ ch = Xmalloc (nbytes + 1);
/* +1 to leave room for last null-terminator */
+ }
if ((! flist) || (! ch)) {
if (flist) Xfree((char *) flist);
if (ch) Xfree(ch);
- _XEatData(dpy, (unsigned long) nbytes);
+ _XEatDataWords(dpy, rep.length);
UnlockDisplay(dpy);
SyncHandle();
return (char **) NULL;
@@ -65,16 +69,20 @@ char **XGetFontPath(
/*
* unpack into null terminated strings.
*/
+ chend = ch + (nbytes + 1);
length = *ch;
for (i = 0; i < rep.nPaths; i++) {
- flist[i] = ch+1; /* skip over length */
- ch += length + 1; /* find next length ... */
- length = *ch;
- *ch = '\0'; /* and replace with null-termination */
+ if (ch + length < chend) {
+ flist[i] = ch+1; /* skip over length */
+ ch += length + 1; /* find next length ... */
+ length = *ch;
+ *ch = '\0'; /* and replace with null-termination */
+ count++;
+ } else
+ flist[i] = NULL;
}
}
- else flist = NULL;
- *npaths = rep.nPaths;
+ *npaths = count;
UnlockDisplay(dpy);
SyncHandle();
return (flist);