Hi All,

We hit the kernel oops again on our setup. Any suggestion to fix that?
Thanks.

Our set up is:
kernel: 2.6.24-24
open-iscsi: 2.0-870.3

kernel logs:
Oct  9 21:15:50 ian_ser_2 kernel: [28466.697051] scsi841 : iSCSI Initiator
over TCP/IP
Oct  9 21:15:50 ian_ser_2 kernel: [28466.962031] scsi 841:0:0:201:
Direct-Access     IET      VIRTUAL-DISK     0    PQ: 0 ANSI: 4
Oct  9 21:15:50 ian_ser_2 kernel: [28466.969109] sd 841:0:0:201: [sdd]
4505472 512-byte hardware sectors (2307 MB)
Oct  9 21:15:50 ian_ser_2 kernel: [28466.973314] sd 841:0:0:201: [sdd] Write
Protect is off
Oct  9 21:15:50 ian_ser_2 kernel: [28466.973320] sd 841:0:0:201: [sdd] Mode
Sense: 77 00 00 08
Oct  9 21:15:50 ian_ser_2 kernel: [28466.975420] sd 841:0:0:201: [sdd] Write
cache: disabled, read cache: disabled, doesn't support DPO or FUA
Oct  9 21:15:50 ian_ser_2 kernel: [28466.977468] sd 841:0:0:201: [sdd]
4505472 512-byte hardware sectors (2307 MB)
Oct  9 21:15:50 ian_ser_2 kernel: [28466.977938] sd 841:0:0:201: [sdd] Write
Protect is off
Oct  9 21:15:50 ian_ser_2 kernel: [28466.977944] sd 841:0:0:201: [sdd] Mode
Sense: 77 00 00 08
Oct  9 21:15:50 ian_ser_2 kernel: [28466.981749] sd 841:0:0:201: [sdd] Write
cache: disabled, read cache: disabled, doesn't support DPO or FUA
Oct  9 21:15:50 ian_ser_2 kernel: [28466.981761]  sdd: sdd1
Oct  9 21:15:50 ian_ser_2 kernel: [28467.027801] sd 841:0:0:201: [sdd]
Attached SCSI disk
Oct  9 21:15:50 ian_ser_2 kernel: [28467.027886] sd 841:0:0:201: Attached
scsi generic sg4 type 0
Oct  9 21:16:01 ian_ser_2 kernel: [28477.713280]  connection626:0: ping
timeout of 15 secs expired, last rx 7049831, last ping 7052331, now 7056081
Oct  9 21:16:01 ian_ser_2 kernel: [28477.713467]  connection626:0: detected
conn error (1011)
Oct  9 21:16:01 ian_ser_2 kernel: [28477.717268]  connection627:0: ping
timeout of 15 secs expired, last rx 7049832, last ping 7052332, now 7056082
Oct  9 21:16:01 ian_ser_2 kernel: [28477.717458]  connection627:0: detected
conn error (1011)
Oct  9 21:16:10 ian_ser_2 kernel: [28486.049414] BUG: unable to handle
kernel NULL pointer dereference at virtual address 00000060
Oct  9 21:16:10 ian_ser_2 kernel: [28486.049639] printing eip: e08a212a *pde
= 00000000
Oct  9 21:16:10 ian_ser_2 kernel: [28486.049924] Oops: 0000 [#1] SMP
Oct  9 21:16:10 ian_ser_2 kernel: [28486.050100] Modules linked in:
iscsi_tcp libiscsi scsi_transport_iscsi iscsi_trgt crc32c libcrc32c
nls_iso8859_1 nls_cp437 vfat fat vmmemctl cpufreq_conservative
cpufreq_ondemand cpufreq_userspace cpufreq_stats freq_table
cpufreq_powersave sbs video output sbshc dock battery iptable_filter
ip_tables x_tables vmhgfs lp loop ipv6 container serio_raw ac button evdev
parport_pc parport i2c_piix4 i2c_core intel_agp agpgart shpchp pci_hotplug
psmouse pcspkr ext3 jbd mbcache sd_mod sg sr_mod cdrom pata_acpi ata_generic
floppy pcnet32 mii mptspi mptscsih mptbase scsi_transport_spi ata_piix
libata scsi_mod raid10 raid456 async_xor async_memcpy async_tx xor raid1
raid0 multipath linear md_mod dm_mirror dm_snapshot dm_mod thermal processor
fan fbcon tileblit font bitblit softcursor fuse vmxnet
Oct  9 21:16:10 ian_ser_2 kernel: [28486.051174]

Oct  9 21:16:10 ian_ser_2 kernel: [28486.051174]
Oct  9 21:16:10 ian_ser_2 kernel: [28486.051286] Pid: 16444, comm:
iscsi_scan_839 Not tainted (2.6.24-24-generic #1)
Oct  9 21:16:10 ian_ser_2 kernel: [28486.051433] EIP: 0060:[<e08a212a>]
EFLAGS: 00010202 CPU: 0
Oct  9 21:16:10 ian_ser_2 kernel: [28486.052073] EIP is at
spi_device_match+0x1a/0x60 [scsi_transport_spi]
Oct  9 21:16:10 ian_ser_2 kernel: [28486.052178] EAX: 00000000 EBX: c27ff0b0
ECX: c27ff000 EDX: c27ff0b0
Oct  9 21:16:10 ian_ser_2 kernel: [28486.052274] ESI: c27ff0b0 EDI: d0c31800
EBP: c0286000 ESP: dc1dfef0
Oct  9 21:16:10 ian_ser_2 kernel: [28486.052367]  DS: 007b ES: 007b FS: 00d8
GS: 0000 SS: 0068
Oct  9 21:16:10 ian_ser_2 kernel: [28486.052473] Process iscsi_scan_839
(pid: 16444, ti=dc1de000 task=d7823140 task.ti=dc1de000)
Oct  9 21:16:10 ian_ser_2 kernel: [28486.052586] Stack: e08a7c90 c0285c8f
e095e328 c27ff1d8 cc1c3430 c27ff000 c27ff0b0 d0c31800
Oct  9 21:16:10 ian_ser_2 kernel: [28486.052792]        00000202 e09449cd
c27ff000 cc1c3430 e0944a2f c27ff000 cc1c3400 e0944acc
Oct  9 21:16:10 ian_ser_2 kernel: [28486.052944]        d0c31814 cc1c30a4
e0944b50 00000000 e0944b64 00000000 c02805c2 cc1c30a4
Oct  9 21:16:10 ian_ser_2 kernel: [28486.053101] Call Trace:
Oct  9 21:16:10 ian_ser_2 kernel: [28486.053340]  [<c0285c8f>]
attribute_container_device_trigger+0x4f/0xb0
Oct  9 21:16:10 ian_ser_2 kernel: [28486.053963]  [<e09449cd>]
__scsi_remove_device+0x3d/0x80 [scsi_mod]
Oct  9 21:16:10 ian_ser_2 kernel: [28486.054083]  [<e0944a2f>]
scsi_remove_device+0x1f/0x30 [scsi_mod]
Oct  9 21:16:10 ian_ser_2 kernel: [28486.054185]  [<e0944acc>]
__scsi_remove_target+0x8c/0xc0 [scsi_mod]
Oct  9 21:16:10 ian_ser_2 kernel: [28486.054284]  [<e0944b50>]
__remove_child+0x0/0x20 [scsi_mod]
Oct  9 21:16:10 ian_ser_2 kernel: [28486.054380]  [<e0944b64>]
__remove_child+0x14/0x20 [scsi_mod]
Oct  9 21:16:10 ian_ser_2 kernel: [28486.054474]  [<c02805c2>]
device_for_each_child+0x22/0x40
Oct  9 21:16:10 ian_ser_2 kernel: [28486.054561]  [<e09ae7f0>]
__iscsi_unbind_session+0x0/0xa0 [scsi_transport_iscsi]
Oct  9 21:16:10 ian_ser_2 kernel: [28486.054709]  [<e0944b3e>]
scsi_remove_target+0x3e/0x50 [scsi_mod]
Oct  9 21:16:10 ian_ser_2 kernel: [28486.054807]  [<e09ae85c>]
__iscsi_unbind_session+0x6c/0xa0 [scsi_transport_iscsi]
Oct  9 21:16:10 ian_ser_2 kernel: [28486.054952]  [<c013ce6f>]
run_workqueue+0xbf/0x160
Oct  9 21:16:10 ian_ser_2 kernel: [28486.055040]  [<c013d910>]
worker_thread+0x0/0xe0
Oct  9 21:16:10 ian_ser_2 kernel: [28486.055116]  [<c013d994>]
worker_thread+0x84/0xe0
Oct  9 21:16:10 ian_ser_2 kernel: [28486.055238]  [<c0140c20>]
autoremove_wake_function+0x0/0x40
Oct  9 21:16:10 ian_ser_2 kernel: [28486.055323]  [<c013d910>]
worker_thread+0x0/0xe0
Oct  9 21:16:10 ian_ser_2 kernel: [28486.055398]  [<c0140962>]
kthread+0x42/0x70
Oct  9 21:16:10 ian_ser_2 kernel: [28486.055469]  [<c0140920>]
kthread+0x0/0x70
Oct  9 21:16:10 ian_ser_2 kernel: [28486.055541]  [<c0105667>]
kernel_thread_helper+0x7/0x10
Oct  9 21:16:10 ian_ser_2 kernel: [28486.055742]  =======================
Oct  9 21:16:10 ian_ser_2 kernel: [28486.055828] Code: 08 88 50 07 b8 08 00
00 00 c3 8d b4 26 00 00 00 00 53 89 d0 89 d3 e8 b6 1b 0a 00 85 c0 74 1c 8b
83 50 ff ff ff 8d 8b 50 ff ff ff <8b> 40 60 85 c0 74 09 81 78 1c c0 7c 8a e0
74 06 31 c0 5b c3 66
Oct  9 21:16:10 ian_ser_2 kernel: [28486.056243] EIP: [<e08a212a>]
spi_device_match+0x1a/0x60 [scsi_transport_spi] SS:ESP 0068:dc1dfef0
Oct  9 21:16:10 ian_ser_2 kernel: [28486.057126] ---[ end trace
dda5576840946286 ]---

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