Author: kib Date: Sat Jul 16 13:24:58 2016 New Revision: 302936 URL: https://svnweb.freebsd.org/changeset/base/302936
Log: Another issue reported on http://seclists.org/oss-sec/2016/q3/68 is that struct kevent member ident has uintptr_t type, which is silently truncated to int in the call to fget(). Explicitely check for the valid range. Sponsored by: The FreeBSD Foundation MFC after: 1 week Modified: head/sys/kern/kern_event.c Modified: head/sys/kern/kern_event.c ============================================================================== --- head/sys/kern/kern_event.c Sat Jul 16 12:25:37 2016 (r302935) +++ head/sys/kern/kern_event.c Sat Jul 16 13:24:58 2016 (r302936) @@ -1183,8 +1183,11 @@ 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; _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
