Public bug reported:
I resumed from a suspend to RAM. I'll attach dmesg, uname -a, lspci and
/proc/version_signature.
I had bluetooth enabled and had established a serial connection over bluetooth
which I didn't release when suspending. I have used that connection as a modem
with wvdial.
I also mounted an ftpfs over FUSE which I didn't unmount before suspending.
FWIW: The kernel is rather unstable on my machine. It often freezes hard
when dealing with Bluetooth or the sd-card reader in my Lenovo x61s.
This issue is pretty reproducible, so please let me know if I can provide
further information.
The issue itself reflects in the following piece of dmesg:
[ 7.268808] usb 1-1: new full speed USB device using uhci_hcd and address 7
[ 7.438947] usb 1-1: configuration #1 chosen from 1 choice
[ 7.439339] Unable to handle kernel NULL pointer dereference at
0000000000000008 RIP:
[ 7.439343] [<ffffffff802febc8>] sysfs_get_dentry+0x38/0xa0
[ 7.439353] PGD 7a47d067 PUD 7a7c4067 PMD 0
[ 7.439356] Oops: 0000 [1] SMP
[ 7.439359] CPU 0
[ 7.439361] Modules linked in: e1000 iwl4965 iwlwifi_mac80211 cfg80211
ppp_deflate zlib_deflate bsd_comp ppp_async crc_ccitt ppp_generic slhc rfcomm
l2cap hci_usb bluetooth af_packet i915 drm binfmt_misc vboxdrv ipt_MASQUERADE
iptable_nat nf_nat nf_conntrack_ipv4 xt_state nf_conntrack ipt_REJECT xt_tcpudp
bridge ppdev ipv6 container sbs bay sbshc dock acpi_cpufreq cpufreq_powersave
cpufreq_stats cpufreq_userspace cpufreq_ondemand cpufreq_conservative
freq_table iptable_filter ip_tables x_tables ext2 mbcache uinput tp_smapi
thinkpad_ec sbp2 parport_pc lp parport arc4 ecb pcmcia thinkpad_acpi nvram
evdev pcspkr snd_hda_intel psmouse serio_raw snd_pcm_oss snd_mixer_oss sdhci
mmc_core battery snd_pcm ac yenta_socket rsrc_nonstatic snd_page_alloc
snd_hwdep pcmcia_core snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi
snd_seq_midi_event video output snd_seq snd_timer snd_seq_device button
iTCO_wdt iTCO_vendor_support snd shpchp pci_hotplug intel_agp soundcore
reiserfs sha256_generic aes_generic aes_x86_64 cbc blkcipher sg sd_mod ohci1394
ieee1394 ata_piix ehci_hcd uhci_hcd usbcore ata_generic pata_acpi libata
scsi_mod dm_crypt dm_mod thermal processor fan fbcon tileblit font bitblit
softcursor fuse
[ 7.439453] Pid: 7835, comm: btdelconn Not tainted 2.6.24-16-generic #1
[ 7.439455] RIP: 0010:[<ffffffff802febc8>] [<ffffffff802febc8>]
sysfs_get_dentry+0x38/0xa0
[ 7.439460] RSP: 0018:ffff810079babdb0 EFLAGS: 00010282
[ 7.439462] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000026
[ 7.439464] RDX: ffff8100793e5b40 RSI: 0000000000000025 RDI: ffff81007709e750
[ 7.439467] RBP: ffff810034035000 R08: 0000000000000023 R09: 0000000000000000
[ 7.439469] R10: 8000000000000000 R11: ffffffff80311760 R12: ffff810052bf63c0
[ 7.439471] R13: 00000000fffffff4 R14: ffff81002a8c3700 R15: 0000000000000000
[ 7.439474] FS: 0000000000000000(0000) GS:ffffffff805b0000(0000)
knlGS:0000000000000000
[ 7.439477] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b
[ 7.439479] CR2: 0000000000000008 CR3: 000000007abf6000 CR4: 00000000000006e0
[ 7.439481] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 7.439483] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 7.439486] Process btdelconn (pid: 7835, threadinfo ffff810079baa000, task
ffff81005291cf80)
[ 7.439488] Stack: ffff8100795c7f40 ffff8100378535a0 ffff810052bf63c0
ffffffff802fee32
[ 7.439494] 00000000000080d0 ffff8100795c7f40 ffff810052bfe4f0
ffff810060353840
[ 7.439498] 00000000fffffff4 ffff81002a8c3700 0000000000000000
ffffffff80344c73
[ 7.439502] Call Trace:
[ 7.439510] [<ffffffff802fee32>] sysfs_move_dir+0x52/0x230
[ 7.439524] [<ffffffff80344c73>] kobject_move+0xb3/0x140
[ 7.439537] [<ffffffff803b711a>] device_move+0x6a/0x150
[ 7.439553] [<ffffffff886b2eaa>] :bluetooth:del_conn+0x1a/0x60
[ 7.439564] [<ffffffff886b2e90>] :bluetooth:del_conn+0x0/0x60
[ 7.439568] [<ffffffff8024f21c>] run_workqueue+0xcc/0x170
[ 7.439571] [<ffffffff8024fda0>] worker_thread+0x0/0x110
[ 7.439577] [<ffffffff8024fda0>] worker_thread+0x0/0x110
[ 7.439582] [<ffffffff8024fe43>] worker_thread+0xa3/0x110
[ 7.439589] [<ffffffff80253960>] autoremove_wake_function+0x0/0x30
[ 7.439596] [<ffffffff8024fda0>] worker_thread+0x0/0x110
[ 7.439602] [<ffffffff8024fda0>] worker_thread+0x0/0x110
[ 7.439606] [<ffffffff8025359b>] kthread+0x4b/0x80
[ 7.439614] [<ffffffff8020d198>] child_rip+0xa/0x12
[ 7.439634] [<ffffffff80253550>] kthread+0x0/0x80
[ 7.439638] [<ffffffff8020d18e>] child_rip+0x0/0x12
[ 7.439645]
[ 7.439646]
[ 7.439646] Code: 48 8b 43 08 48 39 c2 75 f4 48 8b 7d 10 48 81 c7 b8 00 00
00
[ 7.439657] RIP [<ffffffff802febc8>] sysfs_get_dentry+0x38/0xa0
[ 7.439661] RSP <ffff810079babdb0>
[ 7.439662] CR2: 0000000000000008
[ 7.439665] ---[ end trace c52925f1832e407e ]---
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
--
2.6.24-16-generic Oopses: " comm: btdelconn Not tainted" "Unable to handle
kernel NULL pointer dereference at 0000000000000008 RIP:"
https://bugs.launchpad.net/bugs/223651
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