Date: Wed, 16 Feb 2000 17:25:19 -0800 (PST)
From: Jin Guojun (FTG staff) <jin@gracie.lbl.gov>
To: FreeBSD-gnats-submit@freebsd.org
Subject: kern/16767: open("/dev/ppi0") will crash machine without sync disk
Message-ID: <200002170125.RAA01071@gracie.lbl.gov>
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>Number: 16767
>Category: kern
>Synopsis: open("/dev/ppi0") will crash machine without sync disk
>Confidential: no
>Severity: critical
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed Feb 16 17:30:01 PST 2000
>Closed-Date:
>Last-Modified:
>Originator: Jin Guojun (FTG staff)
>Release: FreeBSD 4.0-200002xx-CURRENT i386
>Organization:
>Environment:
FreeBSD 4.0-200002xx-CURRENT i386
>Description:
any user can use the following code to crash system.
Also, the ppi program interface is no longer exist
in 4.0-xxxx-CURRENT; see header files within #if 0 ... #endif /* 0 */
>How-To-Repeat:
Run following code will simply cause system panic without
sync the file system:
/* cc this_ppi.c
./aout --> system crash
*/
#include <fcntl.h>
#if 0
#if (__FreeBSD__ > 3) /* non-user level header files for using ppi */
#define _KERNEL
#include <sys/bus.h>
#include <sys/bus_private.h>
#endif
#include </sys/dev/ppbus/ppi.h> /* user interface */
#include </sys/dev/ppbus/ppbconf.h>
#endif
main(int argc, char* argv[])
{
int pd;
#define iodev "/dev/ppi0"
if ((pd = open(iodev, O_WRONLY)) < 0)
err(1, "open %s", iodev);
}
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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