Comment 2 for bug 138583

Same for me when trying to synchronize with a Qtek 9100 running Windows Mobile 5:

[291275.346347] BUG: unable to handle kernel NULL pointer dereference at virtual address 0000002c
[291275.346359] printing eip:
[291275.346361] f8b6bba4
[291275.346363] *pde = 00000000
[291275.346368] Oops: 0002 [#1]
[291275.346370] SMP
[291275.346374] Modules linked in: iptable_filter ip_tables x_tables ppp_async ppp_generic slhc crc_ccitt rndis_host cdc_ether usbnet ipaq usbserial kqemu isofs snd_rtctimer nfs binfmt_misc af_packet rfcomm l2cap bluetooth nfsd exportfs lockd sunrpc autofs4 ppdev ipv6 capifs video container sbs button dock ac battery w83627hf hwmon_vid eeprom i2c_isa lp rsrc_nonstatic pcmcia_core snd_intel8x0 snd_ac97_codec ac97_bus snd_usb_audio snd_pcm_oss snd_mixer_oss snd_pcm snd_usb_lib snd_hwdep snd_seq_dummy pwc snd_seq_oss compat_ioctl32 snd_seq_midi videodev v4l2_common v4l1_compat xpad snd_rawmidi snd_seq_midi_event parport_pc parport snd_seq snd_timer psmouse serio_raw pcspkr snd_seq_device snd soundcore snd_page_alloc shpchp i2c_sis96x i2c_core pci_hotplug sis_agp agpgart evdev reiserfs usbhid hid sg sr_mod cdrom sd_mod ehci_hcd sis900 mii ohci_hcd usbcore pata_sis ata_generic libata scsi_mod raid10 raid456 xor raid1 raid0 multipath linear md_mod dm_mirror dm_snapshot dm_mod thermal processor fan fuse apparmor commoncap
[291275.346460] CPU: 0
[291275.346462] EIP: 0060:[<f8b6bba4>] Not tainted VLI
[291275.346463] EFLAGS: 00210286 (2.6.22-14-generic #1)
[291275.346494] EIP is at ipaq_open+0x1e4/0x340 [ipaq]
[291275.346497] eax: cd61d000 ebx: 00000100 ecx: e1185000 edx: 00000000
[291275.346501] esi: d8d9b720 edi: e88707d4 ebp: e88707c0 esp: c98cfe60
[291275.346505] ds: 007b es: 007b fs: 00d8 gs: 0033 ss: 0068
[291275.346508] Process pppd (pid: 16932, ti=c98ce000 task=dad6b9f0 task.ti=c98ce000)
[291275.346511] Stack: c9836800 cc51f080 00200292 c0241c47 00000000 c024292d e1185000 ca546980
[291275.346519] 00000064 e1185000 ca546980 c9836800 e118500c f8e8e31a c0241b04 cc51f400
[291275.346526] d27e47f8 c89fc280 ffffffed 00000000 0bc00000 c89fc280 00000000 c02458b7
[291275.346532] Call Trace:
[291275.346541] [<c0241c47>] tty_ldisc_enable+0x27/0x30
[291275.346558] [<c024292d>] init_dev+0x24d/0x5f0
[291275.346572] [<f8e8e31a>] serial_open+0x10a/0x160 [usbserial]
[291275.346589] [<c0241b04>] check_tty_count+0x14/0xb0
[291275.346604] [<c02458b7>] tty_open+0x147/0x2f0
[291275.346612] [<c0245770>] tty_open+0x0/0x2f0
[291275.346619] [<c0183416>] chrdev_open+0xa6/0x190
[291275.346635] [<c0183370>] chrdev_open+0x0/0x190
[291275.346639] [<c017ebf8>] __dentry_open+0xb8/0x1c0
[291275.346656] [<c017edb5>] nameidata_to_filp+0x35/0x40
[291275.346664] [<c017ee10>] do_filp_open+0x50/0x60
[291275.346695] [<c017ee6e>] do_sys_open+0x4e/0xf0
[291275.346701] [<c0106b20>] do_IRQ+0x40/0x70
[291275.346715] [<c017ef4c>] sys_open+0x1c/0x20
[291275.346720] [<c01041d2>] sysenter_past_esp+0x6b/0xa9
[291275.346744] =======================
[291275.346746] Code: ff ba d0 00 00 00 b8 40 9f 3d c0 e8 a7 10 61 c7 8b 4c 24 18 85 c0 89 41 4c 0f 84 26 01 00 00 8b 44 24 18 89 c1 8b 50 44 8b 40 3c <89> 42 2c 8b 41 4c 8b 51 54 89 42 2c 8b 41 44 c7 40 34 00 10 00
[291275.346772] EIP: [<f8b6bba4>] ipaq_open+0x1e4/0x340 [ipaq] SS:ESP 0068:c98cfe60