Oops when mounting NFS

[Jonathan Sambrook]

Binary package hint: linux-source-2.6.24

I've several automounted NFS mounts which have worked for years. They are currently causing a Oops which locks the processes involved, including nautilus and gnome-panel (presumably by way of gvfs?).

I've added uname, dmesg, dmidecode and lspci output to https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.22/+bug/214810 which appears to be the same oops, only on 2.6.22.

[ 870.450520] BUG: unable to handle kernel NULL pointer dereference at virtual address 00000066
[ 870.450538] printing eip: c018c2b9 *pde = 00000000
[ 870.450550] Oops: 0000 [#1]
[ 870.450557] Modules linked in: nvidia(P) i2c_core binfmt_misc rfcomm l2cap nfsd auth_rpcgss exportfs ipx p8023 ppdev lp autofs4 container sbs dock sbshc video output battery cpufreq_conservative cpufreq_userspace cpufreq_stats cpufreq_powersave cpufreq_ondemand nfs lockd nfs_acl sunrpc iptable_filter ip_tables x_tables reiserfs aes_i586 dm_crypt p4_clockmod speedstep_lib freq_table quickcam videodev v4l2_common v4l1_compat yenta_socket rsrc_nonstatic pcmcia_core ipv6 af_packet hci_usb bluetooth prism2_usb evdev p80211 parport_pc parport serio_raw snd_intel8x0 psmouse rtc snd_ac97_codec ac97_bus snd_pcm_oss snd_pcm snd_mixer_oss snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq pcspkr snd_timer snd_seq_device snd soundcore snd_page_alloc button iTCO_wdt iTCO_vendor_support shpchp pci_hotplug intel_agp agpgart ac ext3 jbd mbcache sg sr_mod cdrom sd_mod ata_piix pata_acpi 8139cp floppy ata_generic ohci1394 ieee1394 8139too mii libata scsi_mod ehci_hcd uhci_hcd usbcore 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
[ 870.450697]
[ 870.450704] Pid: 8729, comm: mount.nfs Tainted: P (2.6.24-16-386 #1)
[ 870.450711] EIP: 0060:[<c018c2b9>] EFLAGS: 00010206 CPU: 0
[ 870.450726] EIP is at graft_tree+0x39/0xf0
[ 870.450730] EAX: eb10d580 EBX: ffffffec ECX: 00000000 EDX: f77f9f2c
[ 870.450737] ESI: df479e00 EDI: f77f9f2c EBP: 00000023 ESP: f77f9e04
[ 870.450741] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068
[ 870.450748] Process mount.nfs (pid: 8729, ti=f77f8000 task=e0c11640 task.ti=f77f8000)
[ 870.450752] Stack: f77f9f2c f77f9f30 df479e00 c018c641 00200006 df479e00 f6a6d000 f77e0000
[ 870.450766] c018d73b 00000000 f778e000 00000023 df979e00 00000000 00000001 f6939000
[ 870.450777] c02d28a3 00000001 f7f2fe00 f7aa8c00 00000025 f704e900 f77f9edc 00000000
[ 870.450788] Call Trace:
[ 870.450813] [<c018c641>] do_add_mount+0x71/0xf0
[ 870.450850] [<c018d73b>] do_mount+0x5db/0x6c0
[ 870.450908] [<c02d28a3>] ip4_datagram_connect+0x193/0x350
[ 870.451033] [<c01563fc>] find_lock_page+0x2c/0xa0
[ 870.451074] [<c0158765>] filemap_fault+0x1b5/0x3b0
[ 870.451202] [<c0117eed>] fixup_exception+0x1d/0x60
[ 870.451326] [<c015b61f>] __alloc_pages+0x5f/0x380
[ 870.451351] [<c0302ba0>] do_page_fault+0x0/0x720
[ 870.451468] [<c018c080>] copy_mount_options+0x40/0x140
[ 870.451526] [<c018dbc2>] sys_mount+0x72/0xb0
[ 870.451581] [<c0104132>] sysenter_past_esp+0x6b/0xa9
[ 870.451716] =======================
[ 870.451720] Code: 04 89 c6 89 7c 24 08 8b 40 14 89 d7 8b 40 30 85 c0 79 11 89 d8 8b 74 24 04 8b 1c 24 8b 7c 24 08 83 c4 0c c3 8b 02 b3 ec 8b 48 08 <0f> b7 41 66 25 00 f0 00 00 3d 00 40 00 00 8b 46 10 0f 94 c2 8b
[ 870.451768] EIP: [<c018c2b9>] graft_tree+0x39/0xf0 SS:ESP 0068:f77f9e04
[ 870.451782] ---[ end trace 5785c06c9917abb6 ]---

[Gareth Fitzworthington (mapping-gp-deactivatedaccount)]

Marking as duplicate as this has been confirmed under bug 214810 and passed to kernel team as kernel 2.6.24 bug.
If you think this assignment as a duplicate is in error then please re-mark as NEW.
Thanks.