Null pointer dereference during iSCSI login

2009-03-02 Thread Ulrich Windl 

Hello,

with SLES10 SP1 on x86_64 (open-iscsi-2.0.707-0.32) I'm seeing a problem during 
login using iscsiadm -m node -L automatic. After a few logins, login suddenly 
fails:
Login session [172.20.77.2:3260 iqn.1986-
03.com.hp:fcgw.mpx100:rkdvmis2.1.50001fe1500c1f60.50001fe1500c1f68]
Login session [172.20.77.2:3260 iqn.1986-
03.com.hp:fcgw.mpx100:rkdvmis2.1.50001fe1500c1f60.50001fe1500c1f69]
Login session [172.20.77.2:3260 iqn.1986-
03.com.hp:fcgw.mpx100:rkdvmis2.1.50001fe1500c1f60.50001fe1500c1f6c]
Login session [172.20.77.2:3260 iqn.1986-
03.com.hp:fcgw.mpx100:rkdvmis2.1.50001fe1500c1f60.50001fe1500c1f6d]
Login session [172.20.77.2:3260 iqn.1986-
03.com.hp:fcgw.mpx100:rkdvmis2.1.50001fe1500c1f20.50001fe1500c1f28]
Login session [172.20.77.2:3260 iqn.1986-
03.com.hp:fcgw.mpx100:rkdvmis2.1.50001fe1500c1f20.50001fe1500c1f29]
Login session [172.20.77.2:3260 iqn.1986-
03.com.hp:fcgw.mpx100:rkdvmis2.1.50001fe1500c1f20.50001fe1500c1f2c]
Login session [172.20.77.2:3260 iqn.1986-
03.com.hp:fcgw.mpx100:rkdvmis2.1.50001fe1500c1f20.50001fe1500c1f2d]
Login session [172.20.77.1:3260 iqn.1986-
03.com.hp:fcgw.mpx100:rkdvmis1.1.50001fe1500c1f60.50001fe1500c1f68]
Login session [172.20.77.1:3260 iqn.1986-
03.com.hp:fcgw.mpx100:rkdvmis1.1.50001fe1500c1f60.50001fe1500c1f69]
Login session [172.20.77.1:3260 iqn.1986-
03.com.hp:fcgw.mpx100:rkdvmis1.1.50001fe1500c1f60.50001fe1500c1f6c]
Login session [172.20.77.1:3260 iqn.1986-
03.com.hp:fcgw.mpx100:rkdvmis1.1.50001fe1500c1f60.50001fe1500c1f6d]
Login session [172.20.76.2:3260 iqn.1986-
03.com.hp:fcgw.mpx100:rkdvmis2.0.50001fe1500c1f60.50001fe1500c1f68]
Login session [172.20.76.2:3260 iqn.1986-
03.com.hp:fcgw.mpx100:rkdvmis2.0.50001fe1500c1f60.50001fe1500c1f69]
Login session [172.20.76.2:3260 iqn.1986-
03.com.hp:fcgw.mpx100:rkdvmis2.0.50001fe1500c1f60.50001fe1500c1f6c]
Login session [172.20.76.2:3260 iqn.1986-
03.com.hp:fcgw.mpx100:rkdvmis2.0.50001fe1500c1f60.50001fe1500c1f6d]
Login session [172.20.77.1:3260 iqn.1986-
03.com.hp:fcgw.mpx100:rkdvmis1.1.50001fe1500c1f20.50001fe1500c1f28]
Login session [172.20.77.1:3260 iqn.1986-
03.com.hp:fcgw.mpx100:rkdvmis1.1.50001fe1500c1f20.50001fe1500c1f29]
Login session [172.20.77.1:3260 iqn.1986-
03.com.hp:fcgw.mpx100:rkdvmis1.1.50001fe1500c1f20.50001fe1500c1f2c]
Login session [172.20.77.1:3260 iqn.1986-
03.com.hp:fcgw.mpx100:rkdvmis1.1.50001fe1500c1f20.50001fe1500c1f2d]
Login session [172.20.76.2:3260 iqn.1986-
03.com.hp:fcgw.mpx100:rkdvmis2.0.50001fe1500c1f20.50001fe1500c1f28]
Login session [172.20.76.2:3260 iqn.1986-
03.com.hp:fcgw.mpx100:rkdvmis2.0.50001fe1500c1f20.50001fe1500c1f29]
iscsiadm: Could not login session (err 5).

iscsiadm: initiator reported error (5 - encountered iSCSI login failure)
Login session [172.20.76.2:3260 iqn.1986-
03.com.hp:fcgw.mpx100:rkdvmis2.0.50001fe1500c1f20.50001fe1500c1f2c]

Then the SSH session hangs, but the machine is still alive. Syslog says:
Mar  2 10:36:27 testhost kernel: Unable to handle kernel NULL pointer dereferenc
e at 0232 RIP:
Mar  2 10:36:27 testhost kernel: 802ba089{inet_sendmsg+23}
Mar  2 10:36:27 testhost kernel: PGD 0
Mar  2 10:36:27 testhost kernel: Oops:  [1] SMP
Mar  2 10:36:27 testhost kernel: last sysfs file: 
/class/iscsi_connection/connection22:0/exp_statsn
Mar  2 10:36:27 testhost kernel: CPU 3
Mar  2 10:36:27 testhost kernel: Modules linked in: crc32c libcrc32c iscsi_tcp l
ibiscsi scsi_transport_iscsi nfs lockd nfs_acl sunrpc ip6t_REJECT xt_pkttype ipt
_REJECT ipt_TCPMSS xt_tcpudp ipt_LOG xt_limit xt_state iptable_mangle iptable_na
t ip_nat ip6table_mangle ip_conntrack nfnetlink ip6table_filter ip6_tables xt_ph
ysdev iptable_filter ip_tables x_tables bridge netbk netloop xenblk blkbk blktap
 xenbus_be ipmi_devintf ipv6 ipmi_si ipmi_msghandler af_packet button battery ac
 sr_mod loop usb_storage usbhid hw_random ide_cd cdrom i2c_amd8111 i2c_amd756 i2
c_core ohci_hcd mptctl shpchp usbcore pci_hotplug e1000 8250 serial_core reiserf
s dm_snapshot dm_mod fan thermal processor sg mptsas mptscsih mptbase scsi_trans
port_sas amd74xx sd_mod scsi_mod ide_disk ide_core
Mar  2 10:36:27 testhost kernel: Pid: 25485, comm: scsi_wq_25 Not tainted 
2.6.16.54-0.2.11-xen #1
Mar  2 10:36:27 testhost kernel: RIP: e030:[802ba089] 802ba08
9{inet_sendmsg+23}
Mar  2 10:36:27 testhost kernel: RSP: e02b:880011e0db78  EFLAGS: 00010296
Mar  2 10:36:27 testhost kernel: RAX: 802f1c40 RBX:  RCX
: 0200
Mar  2 10:36:27 testhost kernel: RDX: 880011e0dd58 RSI: 8800080988c0 RDI
: 880011e0dba8
Mar  2 10:36:27 testhost kernel: RBP: 0200 R08: 0200 R09
: 8000
Mar  2 10:36:27 testhost kernel: R10: dbb545c6 R11: 0001 R12
: 880011e0dd58
Mar  2 10:36:27 testhost kernel: R13: 880011e0dba8 R14: 88000bdc52c0 R15
: 0200
Mar  2 10:36:27 testhost kernel: FS:  2b77ef71e6d0() GS:803a2180
() knlGS:
Mar  2 10:36:27 testhost

Re: Null pointer dereference during iSCSI login

2009-03-02 Thread Ulrich Windl 

Hi!

As an add-on to this problem: Any subsequent attempt to run iscsiadm -m node 
-L 
automatic just silently hangs. Trace follows:

# strace iscsiadm -m node -L automatic
execve(/sbin/iscsiadm, [iscsiadm, -m, node, -L, automatic], [/* 56 
vars */]) = 0
brk(0)  = 0x522000
[...]
umask(0177) = 022
socket(PF_FILE, SOCK_STREAM, 0) = 3
connect(3, {sa_family=AF_FILE, pa...@iscsiadm_abstract_namespace}, 110) = 0
write(3, \10\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0..., 2504) = 
2504
recvfrom(3,  unfinished ...

Regards,
Ulrich


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Re: Null pointer dereference during iSCSI login

2009-03-02 Thread Konrad Rzeszutek 

On Mon, Mar 02, 2009 at 10:53:19AM +0100, Ulrich Windl wrote:
 
 Hello,
 
 with SLES10 SP1 on x86_64 (open-iscsi-2.0.707-0.32) I'm seeing a problem 
 during 
 login using iscsiadm -m node -L automatic. After a few logins, login 
 suddenly 

What happens if you use the latest version of Open-iSCSI kernel modules and 
Open-iSCSI utils?
(You will need to patch the kernel directory with the kernel/2.6.16-suse.patch 
for them to compile).

I see the 'kprobes' symbol in there - do you have any of them loaded?

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Re: Null pointer dereference during iSCSI login

2009-03-02 Thread Mike Christie 

Ulrich Windl wrote:
 Hello,
 
 with SLES10 SP1 on x86_64 (open-iscsi-2.0.707-0.32) I'm seeing a problem 
 during 
 login using iscsiadm -m node -L automatic. After a few logins, login 
 suddenly 
 fails:

I think you will have to make a suse bugzilla or try to recreate with 
the current open-iscsi code. open-iscsi-2.0.707 is a little old and I 
have no idea what suse adds to it.

I think suse might actually have this one fixed though. You can contact 
Hannes Reinecke h...@suse.de. I think he gets the suse bugzilla for 
iscsi too, so either way you will reach him.

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