[pnfs] pnfs kernel crash

[Tigran Mkrtchyan]

todays tree : linux client against dCache server.

Regards,
    Tigran.

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kernel BUG at fs/nfs/nfs4proc.c:4541!
invalid opcode: 0000 [#1] SMP
Modules linked in: nfslayoutdriver nfs lockd nfs_acl sunrpc 
iptable_filter ip_tables ip6table_filter ip6_tables x_tables ipv6 edd 
microcode fuse loop dm_mod snd_es1968 gameport snd_ac97_codec ac97_bus 
snd_pcm snd_timer pcmcia snd_page_alloc firmware_class ppdev 
snd_mpu401_uart snd_rawmidi snd_seq_device snd soundcore sr_mod cdrom 
video sg output radio_maestro yenta_socket rtc_cmos i2c_piix4 parport_pc 
rsrc_nonstatic rtc_core videodev e100 battery shpchp ac button parport 
intel_agp rtc_lib v4l1_compat joydev i2c_core pcmcia_core mii 
pci_hotplug agpgart ext3 jbd mbcache sd_mod ata_piix uhci_hcd libata 
usbcore scsi_mod dock fan thermal processor [last unloaded: speedstep_lib]

Pid: 2162, comm: mount.nfs4 Not tainted (2.6.26-rc4-pnfs-default #3)
EIP: 0060:[<e0e473c1>] EFLAGS: 00010246 CPU: 0
EIP is at _nfs4_proc_exchange_id+0x1bc/0x212 [nfs]
EAX: 00000000 EBX: df898a00 ECX: de1b3b20 EDX: 00000000
ESI: 00000000 EDI: 00000000 EBP: de119970 ESP: de1190c4
 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
Process mount.nfs4 (pid: 2162, ti=de118000 task=df954310 task.ti=de118000)
Stack: 00000000 df898a0e df898a11 df898a10 df898a0f df898bac df898a00 
00000000
       00000011 00000000 00000007 6d696843 00617265 00000000 00000000 
00000000
       00000000 00000000 00000000 00000000 00000000 00000000 00000000 
00000000
Call Trace:
 [<e0e1c3b8>] ? decode_and_add_ds+0x41a/0x52f [nfslayoutdriver]
 [<e0e1c8e3>] ? nfs4_pnfs_device_item_get+0x288/0x47e [nfslayoutdriver]
 [<e0e1cb1e>] ? process_deviceid_list+0x45/0x8f [nfslayoutdriver]
 [<e0e1bcb7>] ? filelayout_initialize_mountpoint+0x9d/0xfe [nfslayoutdriver]
 [<e0e57658>] ? set_pnfs_layoutdriver+0x92/0x105 [nfs]
 [<e0e35a77>] ? nfs4_init_pnfs+0x23/0x30 [nfs]
 [<e0e36014>] ? nfs4_get_sb+0x563/0x633 [nfs]
 [<c017874e>] ? vfs_kern_mount+0x82/0xf5
 [<c0178805>] ? do_kern_mount+0x32/0xba
 [<c018b16d>] ? do_new_mount+0x42/0x6c
 [<c018bbed>] ? do_mount+0x184/0x1a2
 [<c02d8f12>] ? error_code+0x72/0x80
 [<c018a2aa>] ? copy_mount_options+0x79/0xf9
 [<c018bc71>] ? sys_mount+0x66/0x9d
 [<c0104a1f>] ? sysenter_past_esp+0x78/0xb9
 [<c02d0000>] ? i8042_create_aux_port+0xcb/0xde
 =======================
Code: e1 10 74 13 50 68 5c b1 e5 e0 68 68 ff e5 e0 e8 2c 54 49 df 83 c4 
0c 8b 83 ec 01 00 00 e8 17 c0 2a 00 83 bd 54 f7 ff ff 00 75 04 <0f> 0b 
eb fe 8b 95 54 f7 ff ff 90 ff 42 2c 89 93 ec 01 00 00 f6
EIP: [<e0e473c1>] _nfs4_proc_exchange_id+0x1bc/0x212 [nfs] SS:ESP 
0068:de1190c4
---[ end trace 5ede4e8972a92c20 ]---