Comment 15 for bug 214810

Hi, This bug also occurs on Ubuntu 8.10. It's pretty serious for me, because the crash now happens almost twice a day. Hi had the very same bug with Ubuntu 8.06's kernel.

Linux karma 2.6.24-18-generic #1 SMP Wed May 28 20:27:26 UTC 2008 i686 GNU/Linux

I'm using autofs with a Thecus N2100 NFS file-server, it's a linux box.

[29871.351477] WARNING: at /build/buildd/linux-2.6.24/fs/inotify.c:172 set_dentry_child_flags()
[29871.351490] Pid: 7229, comm: kded Tainted: P 2.6.24-18-generic #1
[29871.351530] [<c01bc0ff>] set_dentry_child_flags+0xcf/0x160
[29871.351590] [<c01bc1e0>] remove_watch_no_event+0x50/0x60
[29871.351611] [<c01bc2f8>] inotify_remove_watch_locked+0x18/0x50
[29871.351627] [<c019238c>] vfs_read+0x11c/0x170
[29871.351654] [<c01bc65c>] inotify_rm_wd+0x6c/0xb0
[29871.351690] [<c01bcc78>] sys_inotify_rm_watch+0x38/0x60
[29871.351717] [<c01043c2>] sysenter_past_esp+0x6b/0xa9
[29871.351810] =======================
[31382.177527] BUG: unable to handle kernel NULL pointer dereference at virtual address 0000006a
[31382.177536] printing eip: c01a7c39 *pde = 00000000
[31382.177541] Oops: 0000 [#1] SMP
[31382.177544] Modules linked in: autofs4 af_packet vmnet(P) vmblock vmmon(P) binfmt_misc rfcomm l2cap nfsd auth_rpcgss exportfs irtty_sir sir_dev ppdev ipv6 acpi_cpufreq cpufreq_userspace cpufreq_conservative cpufreq_stats cpufreq_powersave cpufreq_ondemand freq_table container sbs bay dock sbshc nfs lockd nfs_acl sunrpc iptable_filter ip_tables x_tables nls_iso8859_1 nls_cp437 vfat fat aes_i586 dm_crypt parport_pc lp parport snd_hda_intel snd_pcm_oss snd_mixer_oss snd_pcm snd_page_alloc snd_hwdep snd_seq_dummy serial_cs snd_seq_oss snd_seq_midi arc4 snd_rawmidi ecb blkcipher snd_seq_midi_event joydev snd_seq pcmcia hci_usb iwl3945 usbhid nvidia(P) bluetooth iwlwifi_mac80211 hid agpgart snd_timer cfg80211 i2c_core snd_seq_device iTCO_wdt iTCO_vendor_support serio_raw yenta_socket rsrc_nonstatic pcmcia_core battery irda video output snd ac wmi_acer crc_ccitt button soundcore dcdbas shpchp pci_hotplug evdev psmouse pcspkr ext3 jbd mbcache sg sr_mod cdrom sd_mod ata_generic ata_piix pata_acpi libata scsi_mod ehci_hcd uhci_hcd usbcore tg3 dm_mirror dm_snapshot dm_mod thermal processor fan fbcon tileblit font bitblit softcursor fuse
[31382.177619]
[31382.177622] Pid: 18847, comm: mount.nfs Tainted: P (2.6.24-18-generic #1)
[31382.177625] EIP: 0060:[<c01a7c39>] EFLAGS: 00010206 CPU: 1
[31382.177632] EIP is at graft_tree+0x39/0xf0
[31382.177634] EAX: deb6f770 EBX: ffffffec ECX: 00000000 EDX: dec6ff2c
[31382.177636] ESI: d119ea00 EDI: dec6ff2c EBP: 0000002b ESP: dec6fe04
[31382.177638] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
[31382.177641] Process mount.nfs (pid: 18847, ti=dec6e000 task=d2b44b80 task.ti=dec6e000)
[31382.177643] Stack: dec6ff2c dec6ff30 d119ea00 c01a7fd2 00200006 d119ea00 ded03000 d32f5000
[31382.177649] c01a90eb 00000000 e21bf000 0000002b 00000246 00000000 00000001 00000040
[31382.177654] 00000007 d2b44b80 001280d2 00000000 c01730d0 00000044 0000014e f7807ac4
[31382.177660] Call Trace:
[31382.177677] [<c01a7fd2>] do_add_mount+0x72/0x100
[31382.177699] [<c01a90eb>] do_mount+0x5fb/0x700
[31382.177741] [<c01730d0>] __alloc_pages+0x60/0x3a0
[31382.177779] [<c0121084>] kunmap_atomic+0x84/0xb0
[31382.177783] [<c012103d>] kunmap_atomic+0x3d/0xb0
[31382.177800] [<c017dbf7>] handle_mm_fault+0x387/0x730
[31382.177821] [<c012103d>] kunmap_atomic+0x3d/0xb0
[31382.177872] [<c031de7f>] do_page_fault+0x13f/0x730
[31382.177917] [<c01730d0>] __alloc_pages+0x60/0x3a0
[31382.177928] [<c031dd40>] do_page_fault+0x0/0x730
[31382.177935] [<c031c512>] error_code+0x72/0x80
[31382.177971] [<c01a7a55>] copy_mount_options+0xa5/0x140
[31382.178000] [<c01a9807>] sys_mount+0x77/0xb0
[31382.178022] [<c01043c2>] sysenter_past_esp+0x6b/0xa9
[31382.178049] [<c0310000>] unix_dgram_recvmsg+0x50/0x2d0
[31382.178074] =======================
[31382.178076] 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 0c <0f> b7 41 6a 25 00 f0 00 00 3d 00 40 00 00 8b 46 10 0f 94 c2 8b
[31382.178104] EIP: [<c01a7c39>] graft_tree+0x39/0xf0 SS:ESP 0068:dec6fe04
[31382.178127] ---[ end trace d83b25df135d8c2b ]---