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Kernel failure message 1:
BUG: unable to handle kernel NULL pointer dereference at 00000006
IP: [<f7cc7ea7>] usb_submit_urb+0x78/0x206 [usbcore]
*pde = 00000000 
Oops: 0000 [#1] SMP 
last sysfs file: /sys/devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0003:00/power_supply/ADP1/online
Modules linked in: cdc_ether usbnet mii cdc_wdm cdc_acm michael_mic arc4 ecb acpi_cpufreq cpufreq_userspace cpufreq_powersave cpufreq_conservative cpufreq_stats fuse nls_utf8 hfsplus firewire_sbp2 loop snd_hda_codec_idt snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event btusb i915 snd_seq snd_timer snd_seq_device drm_kms_helper bluetooth lib80211_crypt_tkip snd rfkill wl(P) isight_firmware soundcore applesmc drm led_class i2c_algo_bit i2c_i801 input_polldev joydev video lib80211 battery snd_page_alloc pcspkr rng_core appletouch mbp_nvidia_bl evdev ac i2c_core button output processor ext3 jbd mbcache hid_apple usbhid hid sg sd_mod crc_t10dif sr_mod cdrom ata_generic firewire_ohci ata_piix uhci_hcd firewire_core crc_itu_t sky2 thermal thermal_sys ehci_hcd libata scsi_mod usbcore nls_base [last unloaded: scsi_wait_scan]

Pid: 1799, comm: modem-manager Tainted: P           (2.6.32-5-686 #1) MacBook2,1
EIP: 0060:[<f7cc7ea7>] EFLAGS: 00010206 CPU: 0
EIP is at usb_submit_urb+0x78/0x206 [usbcore]
EAX: fffffffe EBX: edb96300 ECX: 00000003 EDX: dbdaf1e0
ESI: edb96300 EDI: dbdaf000 EBP: f678fe74 ESP: f678fe24
 DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Process modem-manager (pid: 1799, ti=f678e000 task=f66efb80 task.ti=f678e000)
Stack:
 00000010 edb96300 edb96300 00001388 f678fe74 f7cc8e0a 00000000 00000000
<0> f678fe44 f678fe44 f7cc8276 edb96300 fffffff4 f1344f30 00000000 f7cc906f
<0> 0003fd78 22210000 dad00000 dbdaf000 f951c468 00000000 dbda8000 f24d1000
Call Trace:
 [<f7cc8e0a>] ? usb_start_wait_urb+0x38/0x92 [usbcore]
 [<f7cc8276>] ? usb_init_urb+0x1a/0x26 [usbcore]
 [<f7cc906f>] ? usb_control_msg+0xf7/0x111 [usbcore]
 [<f951b8bc>] ? acm_port_down+0x67/0x15f [cdc_acm]
 [<c11944c4>] ? tty_port_close_start+0xe5/0x12e
 [<f951bd92>] ? acm_tty_close+0x60/0x79 [cdc_acm]
 [<c118f607>] ? tty_release_dev+0x14c/0x3ee
 [<c1001f10>] ? __switch_to+0xcf/0x141
 [<c102b2b8>] ? finish_task_switch+0x34/0x95
 [<c118f8b8>] ? tty_release+0xf/0x18
 [<c10b3ceb>] ? __fput+0xd5/0x170
 [<c10b13c0>] ? filp_close+0x4e/0x54
 [<c10b1420>] ? sys_close+0x5a/0x8d
 [<c10030fb>] ? sysenter_do_call+0x12/0x28
Code: c0 0f 49 d1 c1 e8 0f 83 e0 0f 8b 0c 82 b8 fe ff ff ff 85 c9 0f 84 99 01 00 00 89 4b 2c c7 43 34 8d ff ff ff c7 43 50 00 00 00 00 <0f> b6 41 03 89 c5 83 e5 03 75 26 8b 53 54 b8 f8 ff ff ff 85 d2 
EIP: [<f7cc7ea7>] usb_submit_urb+0x78/0x206 [usbcore] SS:ESP 0068:f678fe24
CR2: 0000000000000006
---[ end trace e9d62862dbf1d631 ]---