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Subject2.6.20-mm1 USB-related OOPS
I get the following OOPS on boot, presumably connected with USB driver
loading. I've attached the entire log. Please CC on replies as I'm not
subscribed.

[ 149.525742] Unable to handle kernel NULL pointer dereference at
0000000000000008 RIP:
[ 149.531302] [<ffffffff8887eec3>] :cdc_acm:acm_probe+0x1dd/0x741
[ 149.539958] PGD 3d248067 PUD 3d23c067 PMD 0
[ 149.544431] Oops: 0000 [1] PREEMPT SMP
[ 149.548475] last sysfs file: /class/net/lo/operstate
[ 149.553510] CPU 0
[ 149.555618] Modules linked in: cdc_acm snd_rtctimer w83627ehf eeprom
i2c_isa nvidia(P) usb_storage usbhid 8139cp snd_hda_intel snd_hda_codec
snd_pcm_oss snd_pcm snd_mixer_oss snd_seq_dummy snd_seq_oss
snd_seq_midi_event snd_seq snd_timer snd_seq_device snd 8139too uhci_hcd
mii soundcore snd_page_alloc i2c_i801 evdev usbcore i2c_core floppy
[ 149.587337] Pid: 1620, comm: modprobe Tainted: P 2.6.20-mm1 #3
[ 149.593785] RIP: 0010:[<ffffffff8887eec3>] [<ffffffff8887eec3>]
:cdc_acm:acm_probe+0x1dd/0x741
[ 149.602650] RSP: 0018:ffff81003df29c98 EFLAGS: 00010246
[ 149.608045] RAX: ffff81003eb14800 RBX: ffff81003eb14820 RCX:
ffff81003eb21008
[ 149.615278] RDX: ffff81003eb14800 RSI: 0000000000000000 RDI:
0000000000000000
[ 149.622507] RBP: 0000000000000000 R08: 0000000000000001 R09:
ffffffff88880d80
[ 149.629730] R10: 0000000000000000 R11: ffffc2000019a7f8 R12:
ffffffff88880d80
[ 149.636960] R13: ffff81003f555800 R14: 0000000000000000 R15:
ffff81003eb14800
[ 149.644183] FS: 00002abc668716d0(0000) GS:ffffffff80544000(0000)
knlGS:0000000000000000
[ 149.652393] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 149.658217] CR2: 0000000000000008 CR3: 000000003d25d000 CR4:
00000000000006e0
[ 149.665458] Process modprobe (pid: 1620, threadinfo ffff81003df28000,
task ffff81003eeb0950)
[ 149.674014] Stack: ffff81003d21af20 ffff81003eb14800
ffff81003edf3418 ffff81003d21af20
[ 149.682317] 00000000fffffff4 ffff81003d4e3820 00ffffff804db922
0000000000000001
[ 149.689981] 0000001088880db0 ffff81003d21af20 ffffffff8801cbe5
ffff81003eb14820
[ 149.697455] Call Trace:
[ 149.700194] [<ffffffff8801cbe5>] :usbcore:usb_match_one_id+0x26/0x84
[ 149.706742] [<ffffffff8801d78e>] :usbcore:usb_probe_interface+0x7d/0xa5
[ 149.713544] [<ffffffff8039ac88>] driver_probe_device+0xf6/0x17f
[ 149.719654] [<ffffffff8039ad94>] __driver_attach+0x0/0x93
[ 149.725230] [<ffffffff8039adee>] __driver_attach+0x5a/0x93
[ 149.730893] [<ffffffff8039a14e>] bus_for_each_dev+0x43/0x6e
[ 149.736644] [<ffffffff8039a48e>] bus_add_driver+0x6b/0x18d
[ 149.742310] [<ffffffff8801d2b0>] :usbcore:usb_register_driver+0x85/0xeb
[ 149.749113] [<ffffffff880560cc>] :cdc_acm:acm_init+0xcc/0x105
[ 149.755037] [<ffffffff8028dd0b>] sys_init_module+0x1572/0x16d2
[ 149.761058] [<ffffffff802561ce>] system_call+0x7e/0x83
[ 149.766361]
[ 149.767898]
[ 149.767898] Code: 49 8b 46 08 80 78 05 0a 74 17 49 8b 47 08 80 78 05
0a 0f 85
[ 149.777661] RIP [<ffffffff8887eec3>] :cdc_acm:acm_probe+0x1dd/0x741
[ 149.784146] RSP <ffff81003df29c98>
[ 149.787694] CR2: 0000000000000008
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