kernel buff overflow

[gerarra at tin.it]

Maybe you would appreciate more something like that:

===================================

> cat kern_syscalls.diff
--- kern_syscalls.c     Sat Sep 18 13:42:21 2004
+++ kern_syscalls2.c    Sun Sep 19 14:59:27 2004
@@ -58,6 +58,12 @@
 syscall_register(int *offset, struct sysent *new_sysent,
                 struct sysent *old_sysent)
 {
+
+#ifdef __i386__
+        if (new_sysent->sy_narg < 0 || new_sysent->sy_narg > i386_SYS_ARGS)
+                return E2BIG;
+#endif
+
        if (*offset == NO_SYSCALL) {
                int i;