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[Linux-cluster] kernel panic



I got the following kernel panic last night on one of
my cluster nodes. Does this look like a known bug?
I'll try and give some other useful info and let me
know if you need any other info.

OS: CentOS release 4.4 (Final)

uname -a
Linux scylla1 2.6.9-42.0.3.ELsmp #1 SMP Fri Oct 6
06:21:39 CDT 2006 i686 i686 i386 GNU/Linux

---------------------------------------------------
Feb  7 18:28:59 scylla1 clurgmgrd: [4346]: <info>
Executing /etc/init.d/httpd status
Feb  7 18:28:59 scylla1 clurgmgrd: [4346]: <info>
Executing /etc/init.d/mysqld status
Feb  7 18:29:00 scylla1 kernel: Unable to handle
kernel NULL pointer dereference at virtual address
00000000
Feb  7 18:29:00 scylla1 kernel:  printing eip:
Feb  7 18:29:00 scylla1 kernel: f8c743a6
Feb  7 18:29:00 scylla1 kernel: *pde = 00004001
Feb  7 18:29:00 scylla1 kernel: Oops: 0000 [#1]
Feb  7 18:29:00 scylla1 kernel: SMP
Feb  7 18:29:00 scylla1 kernel: Modules linked in:
iptable_filter ip_tables nfs nfsd exportfs lockd
nfs_acl parport_pc lp parport autofs4 i2c_dev i2c_core
lock_dlm(U) gfs
(U) lock_harness(U) dlm(U) cman(U) sunrpc dm_mirror
dm_multipath dm_mod button battery ac md5 ipv6
uhci_hcd ehci_hcd hw_random tg3 floppy ext3 jbd cciss
sd_mod scsi_mod
Feb  7 18:29:00 scylla1 kernel: CPU:    1
Feb  7 18:29:00 scylla1 kernel: EIP:   
0060:[<f8c743a6>]    Not tainted VLI
Feb  7 18:29:00 scylla1 kernel: EFLAGS: 00010206  
(2.6.9-42.0.3.ELsmp)
Feb  7 18:29:00 scylla1 kernel: EIP is at
gfs_glock_dq+0xaf/0x16e [gfs]
Feb  7 18:29:00 scylla1 kernel: eax: d3758b30   ebx:
d3758b24   ecx: f7f46400   edx: 00000000
Feb  7 18:29:00 scylla1 kernel: esi: 00000000   edi:
d3758b08   ebp: f6a8b41c   esp: e9adae98
Feb  7 18:29:00 scylla1 kernel: ds: 007b   es: 007b  
ss: 0068
Feb  7 18:29:00 scylla1 kernel: Process ypserv (pid:
31510, threadinfo=e9ada000 task=f387c130)
Feb  7 18:29:00 scylla1 kernel: Stack: 0219c74e
ee98019c f8ca96a0 f8945000 f6a8b41c f6a8b41c f6a8b404
f6a8b400
Feb  7 18:29:00 scylla1 kernel:        f8c747aa
f1cb7280 f8c8945c e9adaeec f1cb7280 00000000 00000007
f1cb7280
Feb  7 18:29:00 scylla1 kernel:        f8c894d0
f1cb7280 f8ca98e0 efeb2e20 c016e8ac 00000000 00000000
00000000
Feb  7 18:29:00 scylla1 kernel: Call Trace:
Feb  7 18:29:00 scylla1 kernel:  [<f8c747aa>]
gfs_glock_dq_uninit+0x8/0x10 [gfs]
Feb  7 18:29:00 scylla1 kernel:  [<f8c8945c>]
do_unflock+0x4f/0x61 [gfs]
Feb  7 18:29:00 scylla1 kernel:  [<f8c894d0>]
gfs_flock+0x62/0x76 [gfs]
Feb  7 18:29:00 scylla1 kernel:  [<c016e8ac>]
locks_remove_flock+0x49/0xe1
Feb  7 18:29:00 scylla1 kernel:  [<c015bbc2>]
__fput+0x41/0x100
Feb  7 18:29:00 scylla1 kernel:  [<c015a7f5>]
filp_close+0x59/0x5f
Feb  7 18:29:00 scylla1 kernel:  [<c0123b5b>]
put_files_struct+0x57/0xc0
Feb  7 18:29:00 scylla1 kernel:  [<c012476f>]
do_exit+0x245/0x404
Feb  7 18:29:00 scylla1 kernel:  [<c0124a19>]
sys_exit_group+0x0/0xd
Feb  7 18:29:00 scylla1 kernel:  [<c02d47cb>]
syscall_call+0x7/0xb
Feb  7 18:29:00 scylla1 kernel: Code: f8 ba 57 85 c9
f8 68 2d 82 c9 f8 8b 44 24 14 e8 e0 1e 02 00 59 5b f6
45 15 08 74 06 f0 0f ba 6f 08 04 f6 45 15 04 74 38 8b
57 28 <8b
> 02 0f 18 00 90 8d 47 28 39 c2 74 0b ff 04 24 89 54
24 04 8b
Feb  7 18:29:00 scylla1 kernel:  <0>Fatal exception:
panic in 5 seconds


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