Mine

root@OpenWrt:/# mount -t vfat /dev/sda1 tmp/foo/
root@OpenWrt:/# ls tmp/foo/
Documents     LaunchU3.exe  System
root@OpenWrt:/# ls tmp/foo/System/
Break instruction in kernel code[#1]:
Cpu 0
$ 0   : 00000000 fffbffff 802c0000 00000000
$ 4   : 81097c48 01ea9000 00000010 00000002
$ 8   : 00000005 00000002 00000000 80262000
$12   : 0000001f 00000000 21f16000 a13e0120
$16   : 8132f030 8132f060 00000002 00000003
$20   : 00000005 81097c48 c0008280 81142aa4
$24   : 00000001 8004ddb0
$28   : 80382000 80383e10 00000001 8004de90
Hi    : 00000000
Lo    : 00000000
epc   : 8004de04 dma_map_sg+0x54/0x128     Tainted: P
ra    : 8004de90 dma_map_sg+0xe0/0x128
Status: 1000bc03    KERNEL EXL IE
Cause : 10800024
PrId  : 00019064
Modules linked in: usb_storage sd_mod scsi_mod ehci_hcd ath_ahb wlan_xauth wlan_
wep wlan_tkip wlan_ccmp wlan_acl ath_rate_sample ath_hal(P) wlan_scan_sta wlan_s
can_ap wlan ip_conntrack_tftp ip_nat_irc ip_conntrack_irc ip_nat_ftp ip_conntrac
k_ftp ppp_async ppp_generic slhc crc_ccitt vfat fat nls_iso8859_1 nls_cp437 usbc
ore nls_base
Process usb-storage (pid: 571, threadinfo=80382000, task=81228168)
Stack : 7fffffff 80383e70 81142aa4 00000000 8132f000 81142b04 c0008280 803d10d4
        803d1060 00004000 c019ef64 81228168 8005ded0 00100100 00200200 00000000
        81142aa4 00004000 c0008280 803d10d4 803d1060 0000001f 803d1060 81142aa4
        00000000 c02a190c 80383e74 00000002 c0008200 00000000 8132f000 00000005
        00004000 00000010 00004000 8006e9fc a1f1600f a1f16000 81142aa4 00004000
        ...
Call Trace:
[<8004de04>] dma_map_sg+0x54/0x128
[<c019ef64>] usb_sg_init+0xa8/0x2ec [usbcore]
[<c02a190c>] usb_stor_bulk_transfer_sg+0x78/0x2e0 [usb_storage]
[<c02a20a0>] usb_stor_Bulk_transport+0x1b4/0x35c [usb_storage]
[<c02a240c>] usb_stor_invoke_transport+0x40/0x1250 [usb_storage]
[<c02a3a54>] fill_inquiry_response+0x438/0x804 [usb_storage]
[<c02a3838>] fill_inquiry_response+0x21c/0x804 [usb_storage]


Code: 8e220000  14400003  3c02802c <0200000d> 3c02802c  8c4392c0  8e020000  0043
1023  00021143