Date: Mon, 3 Jul 2000 02:36:15 -0700 (PDT) From: wyb@lodesoft.com To: freebsd-gnats-submit@FreeBSD.org Subject: i386/19662: kernel panic after too many socket freed Message-ID: <20000703093615.7F84137B8BA@hub.freebsd.org>
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>Number: 19662
>Category: i386
>Synopsis: kernel panic after too many socket freed
>Confidential: no
>Severity: serious
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon Jul 03 02:40:03 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator: Ru Feng
>Release: 4.0-STABLE snapshot 20000625
>Organization:
LodeSoft, Inc.
>Environment:
FreeBSD 4.0-STABLE #27: Mon Jul 3 15:01:58 CST 2000 wyb@lodesoft.com:/usr/src/sys/compile/MINE i386
on
Dell PowerEdge 2400/667
Pentium III 667 x 2, 512M, 9G SCSI HD
network card : fxp0 + xl0
kernel config :
maxusers 256
options SOFTUPDATES
options NMBCLUSTERS=90000
in /etc/rc.local :
sysctl -w kern.maxfiles=65500
sysctl -w kern.maxfilesperproc=60000
sysctl -w net.inet.ip.portrange.last=65500
>Description:
I create a program to test how many connection can freebsd accepted,
it runs upto 32000 connections simultaneity. but when the program finished, the system crashed(or after a while). the error was :
panic : malloc : wrong bucket
(sometimes another message happened, e.g. 'trap 12' or 'cpu0: boot()')
>How-To-Repeat:
// compile and run this program : "./so & ./so c"
// notice you must update NMBCLUSTERS and kern.maxfilesperproc
// at first :
(compile kernel with NMBCLUSTERS > 65000, install, reboot )
sysctl -w kern.maxfiles=65500
sysctl -w kern.maxfilesperproc=60000
sysctl -w net.inet.ip.portrange.last=65000
sysctl -w net.inet.ip.portrange.hifirst=65001
/*
prog : Test Socket Max (so.c)
usage :
$ cc -o so so.c
$ ./so & ./so c
function address_end_point() from idonix.
*/
#define MAX_CONN 32000
#define HOST "127.0.0.1"
#define PORT "65510"
//#include <prelude.h>
# include <fcntl.h>
# include <netdb.h>
# include <unistd.h>
# include <dirent.h>
# include <sys/types.h>
# include <sys/param.h>
# include <sys/socket.h>
# include <sys/time.h>
# include <sys/stat.h>
# include <sys/ioctl.h>
# include <sys/file.h>
# include <sys/wait.h>
# include <netinet/in.h> /* Must come before arpa/inet.h */
# include <arpa/inet.h>
int address_end_point (const char *host, const char *service,
const char *protocol, struct sockaddr_in *sin)
{
struct hostent *phe;
struct servent *pse;
int feedback = 0;
memset ((void *) sin, 0, sizeof (*sin));
sin-> sin_family = AF_INET;
/* Map service name to a port number */
pse = getservbyname (service, protocol);
if (pse)
sin-> sin_port = htons ((short) (ntohs (pse-> s_port)));
else
sin-> sin_port = htons ((short) (atoi (service)));
/* Check if it's a valid IP address first */
sin-> sin_addr.s_addr = inet_addr (host);
if (sin-> sin_addr.s_addr == INADDR_NONE)
{
/* Not a dotted address -- try to translate the name */
phe = gethostbyname (host);
if (phe)
memcpy ((void *) &sin-> sin_addr, phe-> h_addr, phe-> h_length);
else
{ /* Cannot map to host */
feedback = (int) -1;
}
}
return (feedback);
}
int lis;
void client_link()
{
int i, r;
int sd;
char buf[100];
struct sockaddr_in sin;
r = address_end_point(HOST, PORT, "tcp", &sin);
for (i = 0; i < MAX_CONN; i ++) {
sd = socket(AF_INET, SOCK_STREAM, 0);
printf("<%d:%d>\n", i, sd);
if (sd < 0) {
puts("ERROR connect()");
exit(3);
}
r = connect(sd, (struct sockaddr *)&sin, sizeof(sin));
write(sd, "H", 1);
r = read(sd, buf, sizeof(buf));
if (r != 1) {
puts("ERROR read()");
exit(2);
}
}
}
void server_link()
{
int i, r;
int sd;
char buf[100];
struct sockaddr_in sin;
int len = sizeof(sin);
for (i = 0; i < MAX_CONN; i ++) {
sd = accept(lis, (struct sockaddr *)&sin, &len);
printf("<%d:%d>\n", i, sd);
if (sd < 0 )
puts("ERROR accept()");
r = read(sd, buf, sizeof(buf));
if (r <= 0) puts("ERROR read()");
write(sd, buf, r);
}
}
int main(int argc, char** argv)
{
int r;
int is_client = (argc == 2 && *argv[1] == 'c');
struct sockaddr_in sin;
printf("Test Socket Max on %s [%s]\n",
"Front", is_client?"c->s":"s->c");
if (is_client) {
client_link();
}
else {
r = address_end_point(HOST, PORT, "tcp", &sin);
lis = socket(AF_INET, SOCK_STREAM, 0);
r = bind(lis, (struct sockaddr *)&sin, sizeof(sin));
r = listen(lis, 5);
server_link();
}
puts("Over.");
return 0;
}
>Fix:
limit the connections in 4096.
>Release-Note:
>Audit-Trail:
>Unformatted:
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