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Date: Fri, 1 Feb 2002 16:52:25 -0800 (PST)
From: "Marcus L. Reid" <marcus@punq.net>
To: freebsd-gnats-submit@FreeBSD.org
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Subject: kern/34544: Kernel crash on fclose() of /dev/kbd1 when USB keyboard is detached while file is open.
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>Number:         34544
>Category:       kern
>Synopsis:       Kernel crash on fclose() of /dev/kbd1 when USB keyboard is detached while file is open.
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Feb 01 17:00:00 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     Marcus L. Reid
>Release:        4.5-RELEASE
>Organization:
Gampro
>Environment:
FreeBSD zork.punq.net 4.5-RELEASE FreeBSD 4.5-RELEASE #0: Fri Feb  1 16:06:37 PST 2002     root@zork.punq.net:/usr/obj/home/archive/releases/RELENG_4_5/src/sys/ZORK  i386
>Description:
When a USB keyboard is detached while a process has /dev/kbd1 open, the machine crashes hard when the process tries to fclose() the file.     
>How-To-Repeat:
int
main(void)
{
        FILE *fp;

        /* USB keyboard is attached. */
        fp = fopen("/dev/kbd1", "r");
        if(fp) {
                printf("Unplug the keyboard in the next 10 seconds.\n");
                sleep(10);
        }
        else {
                fprintf(stderr, "Couldn't open /dev/kbd1\n");
                exit(1);
        }
        /* USB keyboard is detached by now. */
        fclose(fp);
        /* Boom. */

        exit(0);
}
   
>Fix:
      
>Release-Note:
>Audit-Trail:
>Unformatted:

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