diff options
Diffstat (limited to 'libX11/src/GetImage.c')
| -rw-r--r-- | libX11/src/GetImage.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/libX11/src/GetImage.c b/libX11/src/GetImage.c index e8f1b0309..c461abc09 100644 --- a/libX11/src/GetImage.c +++ b/libX11/src/GetImage.c @@ -30,6 +30,7 @@ in this Software without prior written authorization from The Open Group. #include "Xlibint.h" #include <X11/Xutil.h> /* for XDestroyImage */ #include "ImUtil.h" +#include <limits.h> #define ROUNDUP(nbytes, pad) (((((nbytes) - 1) + (pad)) / (pad)) * (pad)) @@ -56,7 +57,7 @@ XImage *XGetImage ( xGetImageReply rep; register xGetImageReq *req; char *data; - long nbytes; + unsigned long nbytes; XImage *image; LockDisplay(dpy); GetReq (GetImage, req); @@ -78,10 +79,13 @@ XImage *XGetImage ( return (XImage *)NULL; } - nbytes = (long)rep.length << 2; - data = (char *) Xmalloc((unsigned) nbytes); + if (rep.length < (INT_MAX >> 2)) { + nbytes = (unsigned long)rep.length << 2; + data = Xmalloc(nbytes); + } else + data = NULL; if (! data) { - _XEatData(dpy, (unsigned long) nbytes); + _XEatDataWords(dpy, rep.length); UnlockDisplay(dpy); SyncHandle(); return (XImage *) NULL; |