>Number:         5426
>Category:       kern
>Synopsis:       panic: malloc: out of space in kmem_map
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    kern-bug-people (Kernel Bug People)
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri May  8 14:20:00 1998
>Last-Modified:
>Originator:     Stefan Grefen
>Organization:
Stefan Grefen                                Tandem Computers Europe Inc.
grefen@hprc.tandem.com                       High Performance Research Center
 --- Hacking's just another word for nothing left to kludge. ---
>Release:        -current <NetBSD-current source date>
>Environment:
	
NetBSD hicks 1.3E NetBSD 1.3E (CPQ) #11: Thu May  7 22:01:45 CEST 1998     grefen@hicks:/usr/src/sys/arch/i386/compile/CPQ i386
pmap.new uvm Pentium II ??MHZ (Compaq Deskpro 6000)


>Description:
    Crash runnin simple socket testprogram.
    The testprogram connects to a server and sends/receives 128 bytes
    closes the connection and starts all over. Crash happens with ~5000
    sockets in TIME_WAIT. Machine IDLE.
    It happens with local and remote clients.
    I think somehow the defaults for the size various memmory regions are
    suboptimal (I could understand bind/socket/write failing with ENOMEM) 
    or the TIME_WAIT period is too long.
    This works on everything from NT over Solaris , unixware to BSDI 2.1
    with SMP patches).
    I know the programs below can be 'optimized' these is just the 
    benchmark boiled down to the essintials.

>How-To-Repeat:
    server.c:
#include <stdio.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>

int buffer[1024];
main() {
    int s=socket(AF_INET,SOCK_STREAM,NULL);
    struct sockaddr_in sin;

    bzero(&sin,sizeof(sin));
    sin.sin_family=AF_INET;
    sin.sin_len=sizeof(sin);
    sin.sin_port=htons(4321);

    bind(s,&sin,sizeof(sin));

    listen(s,5);

    while(1) {
        int slen=sizeof(sin);
        int w=accept(s,&sin,&slen);
        int l=recv(w,buffer,128,0);
        if(l<=0)
            exit(!!l);
        send(w,buffer,l,0);
        close(w);
    }
}

    client.c:
#include <stdio.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>

int buffer[1024];
main(int argc,char **argv) {

    while(1) {
        int s=socket(AF_INET,SOCK_STREAM,NULL);
        struct sockaddr_in sin;
        bzero(&sin,sizeof(sin));
        sin.sin_family=AF_INET;
        sin.sin_len=sizeof(sin);
        sin.sin_port=htons(4321);
        inet_aton(argv[1],&sin.sin_addr);

        if(connect(s,&sin,sizeof(sin))<0) {
            perror("connect");
        } else {
            send(s,buffer,128,0);
            recv(s,buffer,128,0);
        }
        close(s);
    }
}

$ server &
$ client 127.0.0.1 &

>Fix:
	
>Audit-Trail:
>Unformatted: