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Granary / granary

Dynamic binary translation framework for instrumenting the Linux kernel and its modules
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[TEST] while test granary with ext3.ko, OS crashed. #30

Closed renzhengeek closed 10 years ago

renzhengeek commented 10 years ago

Hi, I want to see how granary works with real kernel module.

So, I did the following:

  1. sudo insmod granary.ko
  2. sudo touch /dev/granary
  3. sudo modprobe ext3.ko, instead of insmod, because sudo insmod ext3.ko says: 
insmod: ERROR: could not insert module ext3.ko: Unknown symbol in module

4.dmesg, everything seems ok 5.But when sudo mount /dev/sda6 /mnt(want to invoke ext3), the kernel crashed with a black screen full with debug message. here is the error report picture:

20140605_170723 6.I also did a comparing test, skip step 1-2, then the rest step works alright.

pgoodman commented 10 years ago

Is it a watchpoints client?

renzhengeek commented 10 years ago

I use bound_check client.

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-------- 原始邮件 -------- 发件人： Peter Goodman notifications@github.com 日期: 2014-06-05 19:35 (GMT+08:00) 收件人： Granary/granary granary@noreply.github.com 抄送： Ren Zhen renzhengeek@gmail.com 主题： Re: [granary] [TEST] while test granary with ext3.ko, OS crashed. (#30)

Is it a watchpoints client?

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pgoodman commented 10 years ago

Did you make the necessary changes to wake.c, or has the implementation of bit waitqueues changed? They are sensitive to watched addresses. A quick check would be to try to run with the null or watchpoint_null client.

renzhengeek commented 10 years ago

I did not make changes and do not know how to change. OK,I will have try.

从三星移动设备发送

-------- 原始邮件 -------- 发件人： Peter Goodman notifications@github.com 日期: 2014-06-06 1:14 (GMT+08:00) 收件人： Granary/granary granary@noreply.github.com 抄送： Ren Zhen renzhengeek@gmail.com 主题： Re: [granary] [TEST] while test granary with ext3.ko, OS crashed. (#30)

Did you make the necessary changes to wake.c, or has the implementation of bit waitqueues changed? They are sensitive to watched addresses. A quick check would be to try to run with the null or watchpoint_null client.

— Reply to this email directly or view it on GitHub.

pgoodman commented 10 years ago

Take a look at the change history to the Granary/linux repo and you will see some changes to wake.c.

renzhengeek commented 10 years ago

clone https://github.com/Granary/linux, then build kernel from it, finally everythings works fun.

Thanks :)