Re: [Bluez-devel] Warnings and Oops on 2.6.23-rc6 while activilyusing rfcomm links (mm/slab.c)

From: Marcel Holtmann
Date: Wed Sep 26 2007 - 18:17:48 EST

Hi Pierre-Yves,

> Putting the bluetooth system under load (opening and closing several
> rfcomm links off several USB adapters, and transmitting data over
> them),
> I got the Oops below. The computer hung completely, as you can see.
> Just
> before, I also got those warnings.

I got another one that also seems to involve device_move() in some way.
No idea on how I really got there. One time after resume it was there
and I was simply using my UMTS mobile phone for Internet connection.



general protection fault: 0000 [#2]
Modules linked in: battery ac thermal fan button ipw2200 ieee80211 ieee80211_cry
pt tg3 btusb ppp_deflate zlib_deflate bsd_comp ppp_async crc_ccitt ppp_generic s
lhc option usbserial ohci_hcd bnep bridge llc rfcomm l2cap bluetooth binfmt_misc
nfsd exportfs lockd sunrpc uinput parport_pc ppdev parport i915 drm ipv6 acpi_c
pufreq cpufreq_stats cpufreq_powersave cpufreq_performance cpufreq_ondemand freq
_table cpufreq_conservative sbs container bay dock fuse snd_intel8x0 snd_ac97_co
dec ac97_bus pcmcia snd_pcm_oss snd_pcm snd_mixer_oss snd_seq_oss snd_seq_midi s
nd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device sdhci firmware_cl
ass evdev sg mmc_core yenta_socket rsrc_nonstatic pcmcia_core snd ehci_hcd uhci_
hcd 8250_pci 8250 serial_core thinkpad_acpi hwmon video output soundcore snd_pag
e_alloc backlight nvram usbcore processor unix
CPU: 0
EIP: 0060:[<c017135d>] Tainted: G D VLI
EFLAGS: 00010282 (2.6.23-rc7 #41)
EIP is at dput+0xf/0xf4
eax: fffffffe ebx: fffffffe ecx: 00000000 edx: f70f6d04
esi: fffffffe edi: f76e14b0 ebp: d16b5de0 esp: d16b5dd8
ds: 007b es: 007b fs: 0000 gs: 0033 ss: 0068
Process wvdial (pid: 5229, ti=d16b5000 task=c46a6cb0 task.ti=d16b5000)
Stack: f1d8b0a8 fffffffe d16b5e18 c019539c ffffffff fffffffe ffffffff 00000000
f77c8ac8 f1d8b0a8 00000000 fffffffe 00000000 f1d8b0a8 f72f9dc0 f72f9f40
d16b5e48 c01d8fea c5d8bec0 c0359476 f72f9f40 fffffff4 c5d8bec0 c5d8bec0
Call Trace:
[<c0106d8a>] show_trace_log_lvl+0x1a/0x2f
[<c0106e3c>] show_stack_log_lvl+0x9d/0xa5
[<c0106ff9>] show_registers+0x1b5/0x287
[<c01071bc>] die+0xf1/0x225
[<c02cd537>] do_general_protection+0x1b8/0x1c0
[<c02ccf1a>] error_code+0x6a/0x70
[<c019539c>] sysfs_move_dir+0x1a0/0x1b2
[<c01d8fea>] kobject_move+0xab/0xf6
[<c023c9d9>] device_move+0x52/0xed
[<f8e36dbf>] rfcomm_tty_open+0x1b9/0x1c4 [rfcomm]
[<c0222fa6>] tty_open+0x170/0x2b1
[<c0164662>] chrdev_open+0xf1/0x137
[<c0160d99>] __dentry_open+0xb8/0x169
[<c0160ecb>] nameidata_to_filp+0x27/0x37
[<c0160f0e>] do_filp_open+0x33/0x3b
[<c0160f5b>] do_sys_open+0x45/0xc4
[<c0161012>] sys_open+0x1c/0x1e
[<c0105d4e>] sysenter_past_esp+0x6b/0xa1
Code: 49 43 83 f9 ff 75 e5 89 75 e8 8d 55 e8 89 f8 e8 f0 fd ff ff 83 c4 0c 5b 5e
5f 5d c3 55 89 e5 56 53 89 c3 85 c0 0f 84 e1 00 00 00 <83> 38 01 75 05 e8 17 a0
15 00 ba 40 8b 39 c0 89 d8 e8 cd 6a 06
EIP: [<c017135d>] dput+0xf/0xf4 SS:ESP 0068:d16b5dd8

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