Smbd 2.0.7 crash, security=share, HP-UX 11.0, 64 bits
Laurent Menu
laurent.menu at temic.fr
Tue Oct 17 11:24:33 GMT 2000
Hi,
I tried to fix this but I can't get it : when in security=share model on
a HP-UX 11 64 bits (9000/800/L2000-44), smbd crashes in an amazing way :
- from a PC NT 4.0 point of view :
net use \\openmail\essai1 toto1
=> OK
net use \\openmail\essai2 toto2
=> crash ! Error 59
( Creating other connections will work, then crash, then work and so on
).
- from the server point of view : first connection is OK, the second
kill the smbd process with a #11 signal (seg fault ?)
- smbd is OK with security=server.
As far as I've drilled down the problem, the smbd process dies on the
second call to the initgroups() function in setup_groups()
(smbd/password.c) :
- the first call to init_group is OK for the essai1 connection,
- the second connection (to essai2) dumps the core
The amazing details are :
- it seems the crash occurs in the OS level function initgroups()
- the same smbd 2.0.7 binary does *not* crash on a 32 bit platform
(9000/856/E55)
I asked HP support about that and had no solution. No real support
'cause they distribute their (as far as I know) own copy of samba :
CIF. [ From my point of view they'd better support the actual
developpment : SAMBA! It's another sort of problem ! ] :-(
I guess a way to bypass the problem would be to completely rewrite the
setup_groups with no calls to initgroups and getgroups. I'd like to
avoid that.
I included in this message :
- the step1 log file corresponding to the first connection (essai1)
- the step2 log file corresponding to the crashing second connection
(essai2)
- the setup_groups function extracted from the password.c file cause I
added a bunch of DEBUG lines and some other garbage to tracks the
origin of the core dump
- both smb.conf and smb.openmail.conf (I use a lot of netbios aliases)
Am I missing something ?
Is there some other solution to the problem except patching ?:
- compilation options ?
- configuration option to avoid the second call to initgroups ?
- patch to the initgroups() function ?
thank you for your help,
Regards,
Laurent Menu
-------------- next part --------------
// original file is smbd/password.c
//============================
// LM : first part of file deleted to keep it shorter
/****************************************************************************
Setup the groups a user belongs to.
****************************************************************************/
int setup_groups(char *user, uid_t uid, gid_t gid, int *p_ngroups, gid_t **p_groups)
{
int i,ngroups;
gid_t grp = 0;
gid_t *groups = NULL;
// char tmpuser[256],*org=user,*dest=tmpuser;
/* DEBLM("YOYOYOYOYOYOY ====\n");
DEBUG(1,("PRELM ======= DEBUT\n"));
initgroups("lmenu",0);
DEBUG(1,("PRELM ======= TEMRINE\n"));
DEBLM("=============\n STEP1\n");
*/
DEBUG(1,("LM ======= User=%s, gid=%d\n getuid=%d, geteuid=%d\n",user,gid,getuid(),geteuid()));
// DEBLM("=============\n STEP1\n");
if (initgroups(user,gid)==-1)
{
// DEBLM("=============\n STEP apres initgroooup perdu \n");
DEBUG(1,("LM ======= apres initgroup merdu"));
DEBUG(0,("Unable to initgroups. Error was %s\n", strerror(errno) ));
if (getuid() == 0)
{
if (gid < 0 || gid > 32767 || uid < 0 || uid > 32767)
{
DEBUG(0,("This is probably a problem with the account %s\n", user));
}
}
return -1;
}
DEBUG(1,("LM ====== dans setup_group, STEP2\n"));
ngroups = sys_getgroups(0,&grp);
DEBUG(1,("LM ====== dans setup_group, STEP3\n"));
if (ngroups <= 0)
{
ngroups = groups_max();
}
if((groups = (gid_t *)malloc(sizeof(gid_t)*ngroups)) == NULL)
{
DEBUG(0,("setup_groups malloc fail !\n"));
return -1;
}
DEBUG(1,("LM ====== dans setup_group, STEP4\n"));
ngroups = sys_getgroups(ngroups,groups);
DEBUG(1,("LM ====== dans setup_group, STEP5\n"));
(*p_ngroups) = ngroups;
(*p_groups) = groups;
DEBUG( 1, ( "%s is in %d groups: ", user, ngroups ) );
for (i = 0; i < ngroups; i++ )
{
DEBUG( 1, ( "%s%d", (i ? ", " : ""), (int)groups[i] ) );
}
DEBUG( 1, ( "\n" ) );
return 0;
}
// LM : remaining part of the smbd/password.c file deleted to keep it shorter
-------------- next part --------------
[2000/10/17 10:24:34, 2] lib/interface.c:(83)
added interface ip=192.168.111.11 bcast=192.168.111.255 nmask=255.255.255.0
[2000/10/17 10:24:34, 2] lib/interface.c:(83)
added interface ip=172.29.102.33 bcast=172.29.255.255 nmask=255.255.0.0
[2000/10/17 10:24:34, 3] lib/interface.c:(63)
not adding duplicate interface 172.29.102.37
[2000/10/17 10:24:34, 3] lib/interface.c:(63)
not adding duplicate interface 172.29.102.41
[2000/10/17 10:24:34, 3] smbd/process.c:(618)
Transaction 1 of length 174
[2000/10/17 10:24:34, 3] smbd/process.c:(448)
switch message SMBnegprot (pid 21397)
[2000/10/17 10:24:34, 3] smbd/negprot.c:(341)
Requested protocol [PC NETWORK PROGRAM 1.0]
[2000/10/17 10:24:34, 3] smbd/negprot.c:(341)
Requested protocol [XENIX CORE]
[2000/10/17 10:24:34, 3] smbd/negprot.c:(341)
Requested protocol [MICROSOFT NETWORKS 1.03]
[2000/10/17 10:24:34, 3] smbd/negprot.c:(341)
Requested protocol [LANMAN1.0]
[2000/10/17 10:24:34, 3] smbd/negprot.c:(341)
Requested protocol [Windows for Workgroups 3.1a]
[2000/10/17 10:24:34, 3] smbd/negprot.c:(341)
Requested protocol [LM1.2X002]
[2000/10/17 10:24:34, 3] smbd/negprot.c:(341)
Requested protocol [LANMAN2.1]
[2000/10/17 10:24:34, 3] smbd/negprot.c:(341)
Requested protocol [NT LM 0.12]
[2000/10/17 10:24:34, 3] smbd/negprot.c:(424)
Selected protocol NT LM 0.12
[2000/10/17 10:24:34, 3] smbd/process.c:(618)
Transaction 2 of length 148
[2000/10/17 10:24:34, 3] smbd/process.c:(448)
switch message SMBsesssetupX (pid 21397)
[2000/10/17 10:24:34, 3] smbd/reply.c:(804)
Domain=[MHS] NativeOS=[Windows NT 1381] NativeLanMan=[]
[2000/10/17 10:24:34, 3] smbd/reply.c:(809)
sesssetupX:name=[PCNTCN14]
[2000/10/17 10:24:34, 3] smbd/reply.c:(946)
Registered username SMBGUEST for guest access
[2000/10/17 10:24:34, 3] smbd/process.c:(775)
Chained message
[2000/10/17 10:24:34, 3] smbd/process.c:(448)
switch message SMBtconX (pid 21397)
[2000/10/17 10:24:34, 3] lib/util.c:(1758)
Get_Hostbyname: Unknown host.
[2000/10/17 10:24:34, 3] lib/util.c:(1758)
Get_Hostbyname: Unknown host.
[2000/10/17 10:24:34, 2] lib/access.c:(257)
Allowed connection from pcntcn14 (172.29.232.164)
[2000/10/17 10:24:34, 3] smbd/password.c:(849)
ACCEPTED: guest account and guest ok
[2000/10/17 10:24:34, 3] smbd/service.c:(441)
Connect path is /tmp
[2000/10/17 10:24:34, 3] lib/doscalls.c:(342)
dos_ChDir to /tmp
[2000/10/17 10:24:34, 3] smbd/service.c:(552)
pcntcn14 (172.29.232.164) connect to service IPC$ as user SMBGUEST (uid=4299, gid=4299) (pid 21397)
[2000/10/17 10:24:34, 3] lib/doscalls.c:(342)
dos_ChDir to /tmp/samba
[2000/10/17 10:24:34, 3] smbd/reply.c:(357)
tconX service=ipc$ user=SMBGUEST
[2000/10/17 10:24:34, 3] smbd/process.c:(618)
Transaction 3 of length 155
[2000/10/17 10:24:34, 3] smbd/process.c:(448)
switch message SMBsesssetupX (pid 21397)
[2000/10/17 10:24:34, 3] smbd/reply.c:(804)
Domain=[MHS] NativeOS=[Windows NT 1381] NativeLanMan=[]
[2000/10/17 10:24:34, 3] smbd/reply.c:(809)
sesssetupX:name=[GSALVIN]
[2000/10/17 10:24:34, 3] smbd/reply.c:(946)
Registered username gsalvin for guest access
[2000/10/17 10:24:34, 3] smbd/process.c:(775)
Chained message
[2000/10/17 10:24:34, 3] smbd/process.c:(448)
switch message SMBtconX (pid 21397)
[2000/10/17 10:24:34, 3] lib/util.c:(1758)
Get_Hostbyname: Unknown host.
[2000/10/17 10:24:34, 3] lib/util.c:(1758)
Get_Hostbyname: Unknown host.
[2000/10/17 10:24:34, 2] lib/access.c:(257)
Allowed connection from pcntcn14 (172.29.232.164)
[2000/10/17 10:24:34, 3] smbd/password.c:(833)
ACCEPTED: user list username and given password ok
[2000/10/17 10:24:34, 3] smbd/service.c:(441)
Connect path is /tmp/samba/share/essai1
[2000/10/17 10:24:34, 1] smbd/service.c:(451)
LM ====== avant setup_groups
[2000/10/17 10:24:34, 1] smbd/password.c:(187)
LM ======= User=toto1, gid=4300
getuid=0, geteuid=0
[2000/10/17 10:24:34, 1] smbd/password.c:(204)
LM ====== dans setup_group, STEP2
[2000/10/17 10:24:34, 1] smbd/password.c:(206)
LM ====== dans setup_group, STEP3
[2000/10/17 10:24:34, 1] smbd/password.c:(218)
LM ====== dans setup_group, STEP4
[2000/10/17 10:24:34, 1] smbd/password.c:(220)
LM ====== dans setup_group, STEP5
[2000/10/17 10:24:34, 1] smbd/password.c:(225)
toto1 is in 1 groups: 4300
[2000/10/17 10:24:34, 1] smbd/service.c:(454)
LM ====== APRES setup_groups
[2000/10/17 10:24:34, 3] lib/doscalls.c:(342)
dos_ChDir to /tmp/samba/share/essai1
[2000/10/17 10:24:34, 1] smbd/service.c:(552)
pcntcn14 (172.29.232.164) connect to service essai1 as user toto1 (uid=30000, gid=4300) (pid 21397)
[2000/10/17 10:24:34, 3] lib/doscalls.c:(342)
dos_ChDir to /tmp/samba
[2000/10/17 10:24:34, 3] smbd/reply.c:(357)
tconX service=essai1 user=toto1
-------------- next part --------------
======== THIS ONE for the crash
[2000/10/17 10:25:50, 3] smbd/process.c:(618)
Transaction 4 of length 79
[2000/10/17 10:25:50, 3] smbd/process.c:(448)
switch message SMBtconX (pid 21397)
[2000/10/17 10:25:50, 3] lib/util.c:(1758)
Get_Hostbyname: Unknown host.
[2000/10/17 10:25:50, 3] lib/util.c:(1758)
Get_Hostbyname: Unknown host.
[2000/10/17 10:25:50, 2] lib/access.c:(257)
Allowed connection from pcntcn14 (172.29.232.164)
[2000/10/17 10:25:50, 3] smbd/password.c:(833)
ACCEPTED: user list username and given password ok
[2000/10/17 10:25:50, 3] smbd/service.c:(441)
Connect path is /tmp/samba/share/essai2
[2000/10/17 10:25:50, 1] smbd/service.c:(451)
LM ====== avant setup_groups
[2000/10/17 10:25:50, 1] smbd/password.c:(187)
LM ======= User=toto2, gid=4300
getuid=0, geteuid=0
[2000/10/17 10:25:50, 0] lib/fault.c:(40)
===============================================================
[2000/10/17 10:25:50, 0] lib/fault.c:(41)
INTERNAL ERROR: Signal 11 in pid 21397 (2.0.7)
Please read the file BUGS.txt in the distribution
[2000/10/17 10:25:50, 0] lib/fault.c:(43)
===============================================================
[2000/10/17 10:25:50, 0] lib/util.c:(2381)
PANIC: internal error
-------------- next part --------------
workgroup = MHS
guest account= SMBGUEST
log file = /tmp/samba/%m.om.log
#debug level = 1
log level = 3
max log size = 5
lock directory = /tmp/samba/locks
locking = yes
security = SHARE
password level = 4
hosts allow = 172.29.0.0 / 255.255.0.0
socket options = TCP_NODELAY
domain master = no
read size = 65535
read raw = yes
read prediction = True
write raw = yes
shared mem size = 3000000
max xmit = 65535
fake oplocks=no
printcap name = /soft/samba/lib/printers.txt
printing = hpux
; elections LM 17/6/98
local master = no
domain master = no
preferred master = no
os level = 26
oplocks=no
;force group = MONK
;force user = MONK
;create mask = 660
;directory mask = 770
writable = yes
public = no
; revalidate = yes
;======================================================
[essai1]
comment = ESSAI LM 1
path = /tmp/samba/share/essai1
writable = yes
valid users = toto1
username = toto1
;======================================================
[essai2]
comment = ESSAI LM 2
path = /tmp/samba/share/essai2
writable = yes
valid users = toto2
username = toto2
-------------- next part --------------
[global]
netbios name = LAUREL
netbios aliases = OPENMAIL
server string = LAUREL SMB.CONF
workgroup=MHS
include = /soft/samba/lib/smb.%L.conf
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