diff options
Diffstat (limited to 'src/XGetKMap.c')
| -rw-r--r-- | src/XGetKMap.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/src/XGetKMap.c b/src/XGetKMap.c index 0540ce4..008a72b 100644 --- a/src/XGetKMap.c +++ b/src/XGetKMap.c @@ -54,6 +54,7 @@ SOFTWARE. #include <config.h> #endif +#include <limits.h> #include <X11/extensions/XI.h> #include <X11/extensions/XIproto.h> #include <X11/Xlibint.h> @@ -93,9 +94,16 @@ XGetDeviceKeyMapping(register Display * dpy, XDevice * dev, return (KeySym *) NULL; } if (rep.length > 0) { - *syms_per_code = rep.keySymsPerKeyCode; - nbytes = (long)rep.length << 2; - mapping = (KeySym *) Xmalloc((unsigned)nbytes); + if (rep.length < INT_MAX >> 2 && + rep.length == rep.keySymsPerKeyCode * keycount) { + *syms_per_code = rep.keySymsPerKeyCode; + nbytes = (long)rep.length << 2; + mapping = (KeySym *) Xmalloc((unsigned)nbytes); + } else { + *syms_per_code = 0; + nbytes = 0; + mapping = NULL; + } if (mapping) _XRead(dpy, (char *)mapping, nbytes); else |