nfs4 kernel hang when using nautilus

[Anthony Messina]

i use nfs4 automounts to access servers on my lan.  occasionally, when i
try to connect to an nfs4 share using nautilus, i get the following.
i'm wondering how figure out how to fix this issue and if anyone else
sees this.  i am using 2.6.19-1.2911.fc6.  thanks in advance for any
help.  -anthony


BUG: unable to handle kernel NULL pointer dereference at virtual address
00000018
printing eip:
f915299c
*pde = 00000000
Oops: 0000 [#1]
SMP 
last sysfs file: /class/net/eth0/carrier
Modules linked in: nfs lockd nfs_acl i915 drm autofs4 hidp rfcomm l2cap
bluetooth sunrpc dm_mirror dm_multipath dm_mod video sbs i2c_ec button
battery asus_acpi ac ipv6 lp joydev snd_intel8x0(F)(U)
snd_ac97_codec(F)(U) snd_ac97_bus snd_seq_dummy(F)(U) snd_seq_oss(F)(U)
snd_seq_midi_event(F)(U) snd_seq(F)(U) snd_seq_device(F)(U)
snd_pcm_oss(F)(U) snd_mixer_oss(F)(U) snd_pcm(F)(U) sg snd_timer(F)(U)
snd(F)(U) i2c_i801 soundcore ide_cd iTCO_wdt snd_page_alloc(F)(U)
i2c_core parport_pc tg3 cdrom parport usblp serio_raw pcspkr usb_storage
ata_piix libata sd_mod scsi_mod ext3 jbd ehci_hcd ohci_hcd uhci_hcd
CPU:    1
EIP:    0060:[<f915299c>]    Tainted: GF     VLI
EFLAGS: 00010246   (2.6.19-1.2911.fc6 #1)
EIP is at nfs_update_inode+0xb0/0x65a [nfs]
eax: 00000000   ebx: 000081b4   ecx: 000081b4   edx: 00008000
esi: ef6c6580   edi: f1b414b0   ebp: f094f758   esp: dbee9de8
ds: 007b   es: 007b   ss: 0068
Process umount.nfs4 (pid: 19406, ti=dbee9000 task=f15383f0
task.ti=dbee9000)
Stack: c17f08b8 ecfbd2e8 00000004 00000000 f15383f0 c0439965 dbee9e00
dbee9e00 
       f1b414b0 f094f610 c062597d c0431551 ecfbd280 f094f758 f1b414b0
f094f7c8 
       f094f758 f9153f17 f1b41400 00000000 ecfbd280 f916128c f1b41400
f29533d0 
Call Trace:
[<f9153f17>] nfs_post_op_update_inode+0x2a/0x39 [nfs]
[<f916128c>] nfs4_proc_delegreturn+0x12c/0x181 [nfs]
[<f916babd>] nfs_do_return_delegation+0xf/0x1d [nfs]
[<f91516e4>] nfs_dentry_iput+0x13/0x3e [nfs]
[<c048482c>] shrink_dcache_for_umount_subtree+0x1c2/0x213
[<c04856c1>] shrink_dcache_for_umount+0x2e/0x3a
[<c04772d8>] generic_shutdown_super+0x19/0xdf
[<c04773d4>] kill_anon_super+0x9/0x30
[<f9154a61>] nfs_kill_super+0xc/0x14 [nfs]
[<c0477469>] deactivate_super+0x57/0x6a
[<c0489172>] expire_mount_list+0xe9/0x120
[<c04891db>] shrink_submounts+0x32/0xad
[<c0489df9>] sys_umount+0xfb/0x22f
[<c0489f44>] sys_oldumount+0x17/0x1a
[<c040404b>] syscall_call+0x7/0xb
[<00754402>] 0x754402
=======================
Code: 20 0f b7 5d 28 89 c8 89 da 25 00 f0 00 00 81 e2 00 f0 00 00 39 c2
0f 85 ac 04 00 00 8b 85 c0 00 00 00 8b b0 a8 01 00 00 8b 40 38 <3b> 68
18 75 52 83 c7 44 89 7c 24 2c 8b 7c 24 20 8d 46 74 89 44 
EIP: [<f915299c>] nfs_update_inode+0xb0/0x65a [nfs] SS:ESP 0068:dbee9de8

-- 
Anthony -  http://messinet.com - http://messinet.com/~amessina/gallery
8F89 5E72 8DF0 BCF0 10BE 9967 92DC 35DC B001 4A4E
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