Re: 2.6.16-mm1
- From: Andrew Morton <akpm@xxxxxxxx>
- Date: Thu, 23 Mar 2006 18:24:11 -0800
Brandon Low <lostlogic@xxxxxxxxxxxxxx> wrote:
I'm getting a repeatable oops regardless of io scheduler (it looks like
it's in cfq code so I first tried changing schedulers) on USB
disconnect.
Kernel is built for athlon k8, but running in 32 bit mode. Tainted by a
madwifi driver which should have no impact on the problem area.
Oops follows, and kernel config attached.
Brandon
usb 1-8: USB disconnect, address 6
BUG: unable to handle kernel NULL pointer dereference at virtual address 00000102
printing eip:
c023e447
*pde = 00000000
Oops: 0000 [#1]
SMP
last sysfs file: /block/sda/sda2/size
Modules linked in: nls_cp437 deadline_iosched sd_mod vfat fat wlan_tkip wlan_scan_sta ath_pci ath_rate_sample wlan ath_hal w83627hf
hwmon_vid eeprom i2c_isa i2c_ali1563 i2c_core snd_pcm_oss snd_mixer_oss snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_ali5451 snd_ac97_codec snd_ac97_bus snd_pcm snd_timer snd soundcore snd_page_alloc rtc pcspkr
CPU: 1
EIP: 0060:[<c023e447>] Tainted: PF VLI
EFLAGS: 00010046 (2.6.16-mm1 #1)
EIP is at cfq_exit_single_io_context+0x27/0x110
eax: 00000086 ebx: f7dcc124 ecx: f7dcc124 edx: f7dcc124
esi: f645b200 edi: 00000006 ebp: 0000000f esp: f6a99e44
ds: 007b es: 007b ss: 0068
Process hald-addon-stor (pid: 11786, threadinfo=f6a99000 task=f6546030)
Stack: <0>f65460e8 00000001 f6c1c070 f6546030 f7dcc124 00000282 c1b4d384 c023e55a
f7dcc124 f6a99000 00000286 c02398c7 c1b4d384 c18de960 f6546030 c1b4d384
c01213f6 f6546030 c0452b40 f654649c f6a99f24 00000001 f7e66500 f6a99000
Call Trace:
<c023e55a> cfq_exit_io_context+0x2a/0x50 <c02398c7> exit_io_context+0x87/0xb0
<c01213f6> do_exit+0x2a6/0x460 <c012161c> do_group_exit+0x3c/0x90
<c012c6c9> get_signal_to_deliver+0x229/0x300 <c0102da9> do_signal+0x69/0x160
<c013781e> ktime_get_ts+0x5e/0x70 <c0246ca2> copy_to_user+0x42/0x60
<c013807e> hrtimer_nanosleep+0xce/0x150 <c0137f90> nanosleep_wakeup+0x0/0x20
<c0138167> sys_nanosleep+0x67/0x70 <c0102ed8> do_notify_resume+0x38/0x3c
<c0103076> work_notifysig+0x13/0x19
Code: 00 00 00 00 83 ec 1c 89 5c 24 10 8b 5c 24 20 89 74 24 14 89 7c 24 18 8b 73 10 85 f6 74 65 8b 3e 9c 58 f6 c4 02 0f 85 82 00 00
00 <8b> 87 fc 00 00 00 e8 0e 3b 15 00 8b 43 14 85 c0 75 57 8b 43 18
<1>Fixing recursive fault but reboot is needed!
OK, thanks. There have been some recent changes affecting iosched context
lifetime management, which might be causing this.
If you have time, it'd be useful if you could retest with
ftp://ftp.kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.16-git6.gz -
that'll tell us whether it's that code or if it's something which is only
in -mm.
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