server freezes from time to time (PE1750 RHEL 4) - Unable to handle kernel NULL pointer

[Götz Reinicke]

Hi,

in the last week and today again our PE1750 with raid 1, dual CPU
freezes. The OS is RHEL 4 with kernel-smp-2.6.9-34.EL. We used
kernel-smp-2.6.9-22.0.1.EL before and AFAIK there where no freezes.

A couple of days before the freezing starts, we changed one defect
harddisk and rebuildet the raid with a new harddisk from dell. Other
hardware/software wasn't changed

Any ideas?


Regards
Götz Reinicke


The last messages on the terminal and in /var/log/messages are:

May 10 06:30:09 mail kernel: Unable to handle kernel NULL pointer
dereference at virtual address 000001b8
May 10 06:30:09 mail kernel:  printing eip:
May 10 06:30:09 mail kernel: c0185420
May 10 06:30:09 mail kernel: *pde = 31cb6001
May 10 06:30:09 mail kernel: Oops: 0000 [#1]
May 10 06:30:09 mail kernel: SMP
May 10 06:30:09 mail kernel: Modules linked in: iptable_filter ip_tables
dcdipm(U) dcdbas(U) parport_pc lp parport md5 ipv6 autofs4 i2
c_dev i2c_core sunrpc dm_mirror dm_mod button battery ac ohci_hcd tg3
floppy sg ext3 jbd megaraid_mbox megaraid_mm sd_mod scsi_mod
May 10 06:30:09 mail kernel: CPU:    3
May 10 06:30:09 mail kernel: EIP:    0060:[<c0185420>]    Tainted: P
   VLI
May 10 06:30:09 mail kernel: EFLAGS: 00010246   (2.6.9-34.ELsmp)
May 10 06:30:09 mail kernel: EIP is at show_map+0x70/0x111
May 10 06:30:09 mail kernel: eax: 00000000   ebx: d38d1544   ecx:
00000008   edx: e94ed2b0
May 10 06:30:09 mail kernel: esi: 00100071   edi: f5f2f280   ebp:
d986ac80   esp: cb5aef24
May 10 06:30:09 mail kernel: ds: 007b   es: 007b   ss: 0068
May 10 06:30:09 mail kernel: Process lsof (pid: 20988,
threadinfo=cb5ae000 task=d72d83b0)
May 10 06:30:09 mail kernel: Stack: 00000070 00124000 00000008 00000006
00030069 cb5aef40 e94ed2b0 c032c980
May 10 06:30:09 mail kernel:        c032c980 f5f2f280 00000000 d38d1544
c0174614 000001f2 00000000 00000400
May 10 06:30:09 mail kernel:        b7fe2000 00000007 00000000 00000006
00000000 c032ce60 dd391480 00000400
May 10 06:30:09 mail kernel: Call Trace:
May 10 06:30:09 mail kernel:  [<c0174614>] seq_read+0x1c7/0x2c2
May 10 06:30:09 mail kernel:  [<c015a3d9>] vfs_read+0xb6/0xe2
May 10 06:30:09 mail kernel:  [<c015a5ec>] sys_read+0x3c/0x62
May 10 06:30:09 mail kernel:  [<c02d251b>] syscall_call+0x7/0xb
May 10 06:30:09 mail kernel:  [<c02d007b>] schedule+0x46b/0x8d3
May 10 06:30:09 mail kernel: Code: c1 e0 0c 50 89 f0 24 80 3c 01 19 c0
83 e0 fd 83 c0 73 f7 c6 04 00 00 00 50 75 1b 83 3d bc 11 41 c0
00 75 19 8b 54 24 18 8b 42 70 <8b> 80 b8 01 00 00 39 43 04 73 07 b8 78
00 00 00 eb 05 b8 2d 00
May 10 06:30:09 mail kernel:  <0>Fatal exception: panic in 5 seconds
May 10 06:30:11 mail root: Process did not exit cleanly, returned 0 with
signal 14


-- 
Götz Reinicke
IT Koordinator - IT OfficeNet

Tel. +49 (0) 7141 - 969 420
Fax  +49 (0) 7141 - 969 55 420
goetz.reinicke at filmakademie.de

Filmakademie Baden-Württemberg
Mathildenstr. 20
71638 Ludwigsburg
www.filmakademie.de