Unable to handle kernel paging request at virtual address 00040004

[ferren]

Kernel version: 3.10.25+

I compiled a driver module from peak(peak-linux-driver-7.9), And when I type 'insmod pcan.ko', kernel crashed with the messages below.

[ 171.987546] pcan: Release_20130814_n (le)
[ 171.987584] pcan: driver config [mod] [usb]
[ 171.987852] usbcore: registered new interface driver pcan
[ 171.987911] pcan: major 248.
[ 171.987954] Unable to handle kernel paging request at virtual address 00040004
[ 171.998231] pgd = d9888000
[ 172.002438] [00040004] *pgd=00000000
[ 172.007445] Internal error: Oops: 5 [#1] PREEMPT ARM

[ferren]

When I use 'bcmrpi_defconfig' to compile the kernel (from github.com/raspberrypi/linux/ branch rpi-3.10.y), the issue can recur. But when I use 'bcmrpi_quick_defconfig' to compile the kernel. The driver module worked fine.

[ferren]

If comment out 'CONFIG_JUMP_LABEL=y'
The issue will be resolve.

[P33M]

Out of interest, could you find out where the bug occurs?

You can use kdb (which should be enabled in the bcmrpi_defconfig) after the kernel crashes to find out which function the kernel was in (btc command in kdb).

[ferren]

I post the messages to

http://dpaste.com/1548715/
http://dpaste.com/1548728/

[P33M]

There's more in the trace log - it blew up in module_put but the bit we need is off the bottom of the screen. Pressing enter in the KDB more > prompt will show the remaining lines.

[ferren]

That is all.
I retry it use the newest kernel from github, and paste the log below.
http://dpaste.com/1552337/