Date: Tue, 10 Mar 1998 10:39:28 -0600 (CST) From: Tim Bandy <bandy@raid.com> To: FreeBSD-gnats-submit@FreeBSD.ORG Subject: kern/5969: non-root user can reboot/lock up system Message-ID: <199803101639.KAA00381@ralph.raid.com>
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>Number: 5969
>Category: kern
>Synopsis: non-root user can reboot/lock up system
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Mar 10 08:50:04 PST 1998
>Last-Modified:
>Originator: Tim Bandy
>Organization:
>Release: FreeBSD 3.0-CURRENT i386
>Environment:
pentium 166MHz 64M
>Description:
I was looking at some code from the ioccc (International Obfuscated C
Code Contest) and locked up my machine. The code that did it is included
below. It does not always lock up in the same manner. It sometimes will
take about 15 seconds or more to lock up, sometimes as quickly as 1.
I've had better luck locking up the system about 30 seconds or so after
it boots, with both X and Xemacs running.
I copied some information off of the console after one such lockup.
Fatal trap 12
fault virtual address 0x38
However, at other times, it does not lock up in the same manner and only
tells me "page fault, syncing disks..."
>How-To-Repeat:
Here's the nasty beast.
int i;main(){for(;i["]<i;++i){--i;}"];read('-'-'-',i+++"hell\
o, world!\n",'/'/'/'));}read(j,i,p){write(j/p+p,i---j,i/i);}
>Fix:
>Audit-Trail:
>Unformatted:
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