Author: kib
Date: Sat Jul 23 08:06:50 2016
New Revision: 303215
URL: https://svnweb.freebsd.org/changeset/base/303215
Log:
MFC r302936:
Explicitely check for the valid range of file descriptor values.
Modified:
stable/9/sys/kern/kern_event.c
Directory Properties:
stable/9/ (props changed)
stable/9/sys/ (props changed)
Modified: stable/9/sys/kern/kern_event.c
==============================================================================
--- stable/9/sys/kern/kern_event.c Sat Jul 23 08:02:45 2016
(r303214)
+++ stable/9/sys/kern/kern_event.c Sat Jul 23 08:06:50 2016
(r303215)
@@ -986,7 +986,10 @@ kqueue_register(struct kqueue *kq, struc
findkn:
if (fops->f_isfd) {
KASSERT(td != NULL, ("td is NULL"));
- error = fget(td, kev->ident, CAP_POLL_EVENT, &fp);
+ if (kev->ident > INT_MAX)
+ error = EBADF;
+ else
+ error = fget(td, kev->ident, CAP_POLL_EVENT, &fp);
if (error)
goto done;
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