Author: kib
Date: Sat Jul 23 08:02:45 2016
New Revision: 303214
URL: https://svnweb.freebsd.org/changeset/base/303214
Log:
MFC r302936:
Explicitely check for the valid range of file descriptor values.
Modified:
stable/10/sys/kern/kern_event.c
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/sys/kern/kern_event.c
==============================================================================
--- stable/10/sys/kern/kern_event.c Sat Jul 23 06:30:00 2016
(r303213)
+++ stable/10/sys/kern/kern_event.c Sat Jul 23 08:02:45 2016
(r303214)
@@ -1083,8 +1083,11 @@ kqueue_register(struct kqueue *kq, struc
findkn:
if (fops->f_isfd) {
KASSERT(td != NULL, ("td is NULL"));
- error = fget(td, kev->ident,
- cap_rights_init(&rights, CAP_EVENT), &fp);
+ if (kev->ident > INT_MAX)
+ error = EBADF;
+ else
+ error = fget(td, kev->ident,
+ cap_rights_init(&rights, CAP_EVENT), &fp);
if (error)
goto done;
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